Decoration.
1. Deployment
The decoration and decoration of this project have a tight construction period and multi-task cross-work, so it must be carefully arranged and deployed. The construction organization is mainly carried out according to the construction stages divided, first rough decoration and then fine decoration, first wet operation and then dry operation, both inside and outside;The exterior decoration is from top to bottom, and the interior decoration is shared by the small room, first the top and then the wall and then the ground;Establish a model system, insist on building a model first, and then expand a large area;At the same time, civil engineering and the installation of various specialties are carried out in three dimensions, cooperate with each other, and try to create conditions for the decoration and installation projects to intervene in advance during the main construction.
Second, the main decoration project construction technology and technical measures
1. Exterior wall coating construction.
1) Operating conditions.
a. The plastering of the exterior wall has been completed, and each layer has been inspected for no hollowing, peeling and cracks
B. The drip line of the lintel, the slope of the window sill, and the yin and yang angles are inspected to meet the requirements;
c. The materials have entered the site and have been jointly accepted by Party A, the supervisor and Party B, and the materials entering the site in the following year should be strictly distinguished, and confusion before and after is strictly prohibited
d. The window frame has been installed, the plug seam has been closed, and the chisel has been repaired
e. The color separation line of the exterior wall should be tested to avoid inconsistency with the local convex or recessed lines
2) Operate the process.
Wall cleaning, punching and dotting, waterproof coating (hanging net), plastering the bottom layer of plaster, plastering the surface layer of plaster, scraping putty, color separation, elastic line, primer, top paint, cleaning.
3) Precautions.
a. The color mixing and stirring of the paint should be carried out by a special person, and a large container should be used to stir it uniformly, so as to make the paint color consistent.
b. Before scraping putty, the yin and yang corners, window sills, and lintels should be inspected and scraped, so as to make the line angles straight and uniform.
c. The same wall should be painted with the same stirring paint as much as possible, and should be stirred frequently when brushing to avoid precipitation and different colors.
d. When playing the color separation line, it is not advisable to use the ink line, but should use the powder line that is similar to the paint color, and it should be pasted with adhesive tape, so as not to cause different interfaces and mixed colors.
e. After the paint is brushed, immediately remove the outer frame, and it is strictly forbidden to damage the wall and pollute the wall when removing the outer frame.
2. Floor tiles: 1) Working conditions:
A, by Party A's design, the selection of the color and material of the tile fabric, before ordering, after the goods arrive at the site, Party A, supervision, construction three parties jointly inspect the point to receive.
b. Floor tiles are classified on the spot, and classified and stacked according to specifications, batch numbers and colors.
c. Clean up the base layer and water it to moisten. The construction of leveling layer, waterproof layer, slope finding layer, etc. has been completed, and has been inspected to meet the acceptance conditions. The waterproof layer should be recorded for hidden inspection and closed water test.
d. Before the construction of floor tiles, the line pipe should be unblocked, the buried pipe is installed, and the professional inspection is correct, so as to avoid rework.
2) Operate the process.
Clean the base layer, wipe the bottom layer mortar, elastic line grid, pave the floor tiles (paste baseboards), scratch the joints, wipe the joints, clean the surface, and cure.
3) Precautions.
a. Each room needs to use the same batch of floor tiles, and the color specifications of the matching room should not deviate too much.
b. When paving, it should be paved from the inside to the outside, first in a small room and then in the common parts.
c. During paving construction, a room should be completed at one time, and it cannot be paved in stages.
d. After the paving is completed, the sawdust is watered and cured for 3 4d, and the curing period is not allowed to be mastered.
e. During construction, it is not allowed to walk around on the unhardened surface layer. If you have to walk around, you should lay a wooden board to increase the stress area. After it is found that the surface brick is displaced, it should be adjusted in time.
f. Test the row in advance to avoid the appearance of less than 1 2 surface bricks and the occurrence of broken life.
g. The surface brick rubbing joints should be wide and narrow, the depth should be consistent, the lines should be smooth, and there should be a flooding slope room, and the slope should meet the design and specification requirements.
3. Latex paint wall:
1) Operating conditions.
a. There is no obvious moisture on the wall, the drying procedure reaches more than 80%, and the wall cannot be constructed when it is too wet.
b. Plastering and leveling of walls and holes in advance.
2) Operate the process.
Repair the wall, scrape putty, brush the head over latex paint, brush twice with latex paint.
3) Precautions.
a. The mix ratio of latex paint putty is latex: talcum powder: hydroxymethyl cellulose (weight ratio) 1: 10 125:0.25. Add water appropriately according to the required consistency.
b. If there are cracks in the wall, the joints should be smoothed with lime plaster.
c. After the putty is dried, sandpaper it is sanded, polished and smoothed, be careful not to wipe through the putty, and do not pollute the doors, windows and baseboards when scraping the putty.
d. Latex paint dries quickly, and many people should cooperate with the flow operation when painting a large area, connect with each other, and gradually brush from one end to the other end to avoid joints.
e. Do not sweep the ground before the painted wall is dry, and do not close to the wall to remove water to avoid pollution, and properly protect it after the paint is completed.
4. Mosaic brick wall.
1) Operating conditions.
a. Bounce the 500mm line of the wall.
b. The door frame and window frame are installed, and the line pipe is dredged, and there is no blockage, which has avoided the removal of the wall after the end.
c. Select bricks in advance and classify and code bricks of different sizes.
d. Sprinkle the base layer with water one day in advance, and soak the bricks in advance and take them out in a cool and ventilated place to cool and dry.
2) Operate the process.
Punching and plastering, plastering, selecting bricks, dipping bricks, drying, corner bricks, wall bricks, set cutting, scribing, white cement slurry wiping joints.
3) Precautions.
a.The color and pattern should be uniform and consistent, and the bricks with missing edges and corners and cracks cannot be used.
b.The roof grid can not appear in a small half, and symmetry should be noted.
c.When cutting the plate, it is necessary to pay attention to the neat and square corners, no damage to the board surface, no bending edges and bulging phenomena;The width and thickness of the corners and grooves should be consistent.
d.When placing the plate, it should be carefully placed, so that the edge of the plate groove is lightly rested on the keel;The board surface and the surrounding keel should be tight.
Road renovation. 1. Construction procedures and practices.
Excavate the loose earthwork during the construction of the pipe network within the subgrade, and the base earthwork is compacted to the compactness required by the design and specification with a road roller
Clean the original roadbed soil and rinse it with water;
If the earthwork depth of the loose filling is within 400mm of the pipe trench part excavated within the subgrade range, then the stable layer of 6 cement is directly backfilled and compacted with a road roller;
If the earthwork depth of the loose filling is more than 400mm excavated at the pipe trench part within the subgrade range, then first use gravel backfill compaction, and the remaining 400mm is then backfilled with the stable layer of 6 cement and compacted with road roller;
Subgrade surface course settlement and damage part with 6 cement stabilized layer repaired and compacted with roller;
There is a passing pipe part in the concrete surface layer construction is recommended to be strengthened with a steel mesh, and the specific scheme should be determined by the design;
2. Construction of subgrade repair layer.
The roadbed is the key process of road engineering, and it must be constructed in strict accordance with the design drawings and specifications. Because the original roadbed has been seriously damaged, it must be repaired according to the construction drawings, and the filler part is constructed by the horizontal layered filling method, and the filler is paved with the full width of the road width in each layer, and there is a lateral slope of 2% and 3%.
In order to ensure the quality of the roadbed after repair, the next process construction can only be carried out after the supervision engineer is inspected and concealed by the supervising engineer after rolling.
The thick gravel layer repair layer construction uses a bulldozer to push away the accumulated gravel for leveling, and uses an 8-12t roller for preliminary stable rolling. Then use a grader to level well, use a vibrating roller to strengthen the rolling to the whole layer of compactness, and finally use a vibrating roller to roll the non-vibration cover to make its surface dense.
Thinner cement stabilized stone chips repair layer construction, to ensure the accurate parameters of cement, cement and stone chips with a mixer mixing, each tank mixing time is not less than 120 banknotes, in order to ensure that the cement stone chips are mixed evenly, each mixing thickness does not exceed 2cm, to ensure that the cement parameters are accurate. The amount of cement and the amount per 10 meters are calculated according to the width of the road, so that the cement content of the cement and stone chip layer is not lower than the optimal content of the design. The optimal water content should be controlled by 1% when the cement and stone chip mixture is rolled, and if the surface moisture is insufficient, it should be properly sprinkled, and the mixture must be rolled on the same day after sprinkling and mixing.
Rolling of cement stone chip repair layer: the front section of the material is paved, flattened, left about 5 meters without rolling, the latter section of the construction will be the previous section of the unpressed part and the latter section of the rolling together, rolling must follow the first light and then heavy, first edge and then middle, first fast and then slow, to ensure that the principle of overlapping wheel tracks when rolling is carried out construction. The rolled road surface is forbidden to turn around and rotate on it to prevent damage to the road surface.
3. Measurement. 1) Each level control point should be retested once to ensure its accuracy.
2) The steel ruler used for measurement must have a measurement verification certificate, and should be properly kept, so as to achieve the use of the same steel ruler to pay off the road in the whole factory area.
3) The level, Jingweiyi should have a metrological verification certificate before it can be put into use, and should be properly kept and used and its accuracy should be checked from time to time to avoid measurement accidents caused by instrument errors.
4) After each measurement, it should be checked in accordance with the relevant regulations and reported to the supervisor for acceptance.
5) Instruments, equipment, testers, test lines, and observation sequences should be fixed.
6) Before the construction layer is leveled, at least three elevation points transmitted from the starting elevation line should be calibrated, and when the calibration difference is less than 3mm, the floor level line should be measured at its average point. When copying, try to place the level in the center of the measuring point range, and carry out a precision leveling, and look at the two horizontal lines for verification.
7) After the control pile of the central axis of the road is checked by the site control pile, the road edge line is determined, and after the closure check, the boundary line required in the road construction is ejected in detail.
8) The error of placing the theodolite alignment is <1mm, and the error is < 20 when the two known edges are backsighted"。
9) After the axis measurement is completed, self-inspection must be carried out, and the inspection form must be filled in in time after qualification, and the measurement results table of the inspection content should be attached, so as to verify the correctness of the center line of each road in time.
12) According to the leveling point for on-site construction, the round-trip measurement method is used to lead to each road section, and the leveling point is set at the appropriate position on the roadside, and the closure difference does not exceed 6 n mm (n is the number of measuring stations).
13) The level of the elevation is measured, and the length of the front and back looks is the same, and the two known elevation points are to be looked back.
14) When inspecting the line, the elevation of the top surface of the base should be checked.
Pedestrian bridges. First, the overall construction plan and arrangement
1) The overall construction plan.
1. Foundation construction.
The steel temporary bridge and the steel platform are provided with two main longitudinal beams, and the longitudinal beams on both sides are two. The load-bearing adopts the upper bearing type, which is transversely paved with I25A, and the spacing is 075m, and then longitudinally lay 25 channel steel distribution beams, spacing 28cm, bridge deck laying 8mm thick steel plate.
2. Main body arrangement.
The steel temporary bridge water foundation is made of steel pipe piles, the specifications of steel pipe piles are 1000mm 10mm, and the steel platform and support positions are made of 600 10mm steel pipe piles. Each steel pipe is considered according to 20m, and the top of the pile at the bridge position is welded with 1100mm 1100mm 20mm steel cover plate and welded between the steel pipe piles with 4 pieces of 10cm 20cm 1cm stiffened triangle plate, and then a double row of I30A I-beams are placed and welded firmly on the steel cover plate, in order to strengthen its stability, two 18A channel steel shear braces are set between the transverse two steel pipe piles.
3. Guardrail arrangement.
The bridge deck is protected by a railing made of small steel pipes (7cm in diameter), and the height of the railing is 12 meters, the railing is set up with 1 column (welded with the channel steel of the bridge deck) every 2 meters longitudinally, and two scaffolding poles are set as crossbars in the height direction, with a spacing of 55cm, and maintained with safety nets.
Second, the construction plan
1) Abutment construction.
The abutment of the temporary bridge is made of reinforced concrete to enlarge the foundation, and the size is 45m 2m 1m, poured 4 on an enlarged basis5m×1.5 m×1.5m reinforced concrete beam, bolts for fixing the bridgehead of the temporary bridge are embedded in the beam. The cone slope of the abutment is piled with woven bags of sand to prevent the slope from scouring and sliding.
2) The production and hoisting and stacking of steel pipe piles.
The steel pipe pile adopts the steel pipe of the purchase design specification, which is transported to the construction site by car, and then the length of the first section is determined according to the water position and water depth of each steel pipe pile, and each section is not more than 10m, and the construction conditions and geological conditions should be considered. Welding and production in accordance with the relevant provisions of the "Technical Specifications for Highway Bridge and Culvert Construction" and the "Manual for the Use of Prefabricated Highway Steel Bridges". The connection between the pipes is connected by spliced steel plates, and 4 connecting pieces of 15 10 1cm specifications are used.
Lifting and stacking of steel pipe piles: two lifting points are used for hoisting, and the distance between the two lifting points and the pile end is one-fifth of the pile length respectively.
3) Insert and drive steel pipe piles.
The construction of the temporary bridge was carried out in the sequence from the west bank to the east bank of the river, and a simple pier was set up at the location of the river beach. The steel pipe pile is transported by a flat car with a length of 12m, and a 50t crawler crane is equipped at the pile sinking position, and the main hook and the auxiliary hook of the crawler crane are used together, and the construction of the first span steel pipe pile is sunk on the embankment, and the crane is set on the formed temporary bridge when the pile is sunk later. The secondary hook of the crawler crane lifts the steel pipe on the flat car horizontally first, moves to a suitable position, lowers the auxiliary hook to adjust the steel pipe pile to make it vertical, and then uses the hydraulic pliers on the vibrating hammer hoisted by the main hook of the crawler crane to fix the steel pipe, and adjusts the verticality of the steel pipe pile through the hydraulic tongs.
The plane position of the steel pipe pile is determined by the total station lofting, and the depth of the steel pipe pile into the soil is controlled by the elevation of the pile top of the steel pipe pile and the length of the steel pipe pile. After the completion of each row of two steel pipe piles, the construction of the connecting system is carried out immediately, and the construction of the beams, longitudinal beams and bridge decks is carried out. In order to prevent workers and materials on the bridge deck from being hoisted into the river, steel pipe guardrails are set on both sides of the temporary bridge. Equipped with necessary safety protection equipment and measures.
After the crane is in place, it is positioned under the guidance of the total station, the steel pipe pile is clamped by the 60kw vibrating hammer clamp, and then put into the guide frame after lifting, and the vibrating hammer is turned on to insert and drive the steel pipe pile, and the crawler crane auxiliary hook maintains the steel pipe pile in a vertical state, and the excitation force of the vibrating hammer is maintained.
Vibration sinks under action. When the pile penetration amount is less than 5cm min, the load can be held for 5 minutes, and the vibration can be stopped only when the steel pipe pile does not sink significantly. When the length of the prefabricated steel pipe pile on the site in the first section is insufficient, the method of connecting the pile while driving is adopted to make the length of the steel pipe pile meet the requirements.
When the steel pipe pile is welded, the 4 connecting pieces of 15 10 1cm specification are welded on the bottom section steel pipe first, so that it is easier to dock the steel pipe pile. Due to the use of vertical welding, it is necessary to strictly control the quality of welding, after welding to check whether the welding meets the requirements, the welding is not good, not firm conditions require re-welding.
Technical requirements for the construction of steel pipe piles:
Piling according to the position and elevation required by the design document.
The slope of the central axis of the steel pipe pile < 1 pile length.
The depth of the steel pipe pile into the soil (into the soil layer) must be greater than 10m, and the actual construction process due to the complex geological conditions of each pier, the elevation of the final hole of the pipe pile should be subject to the DZ60 pile hammer excitation for 5 minutes and still no footage.
When the individual steel pipe pile is less than 5m into the soil and cannot be hammered, and there is still no footage with DZ60 pile hammer excitation for 5 minutes, the geological conditions must be analyzed on site and measures must be taken to strengthen the force.
4) Pile top treatment.
After each completion of a steel pipe pile sinking, determine the pile top elevation according to the design requirements, level the steel pipe pile, cut the part higher than the elevation with oxygen welding, and the pile below the elevation is extended to the pile top elevation according to the actual length. After leveling the top of the steel pipe pile, 60cm of C25 concrete is poured into the pile head, and then 55 55cm 10mm steel cover plate is welded on the top of the pile, and the steel cover plate must be fully welded with the periphery, and ensure that the steel cover plate is level.
5) Welded flat brace and diagonal brace.
According to the layout diagram of the temporary bridge and the drilling platform, the diagonal brace and the flat brace are welded in the steel pipe pile body, and the steel pipe diagonal brace changes the direction every other span, so that the scissor brace form is formed between each hole.
6) Installation of beams.
After the pile top steel cover plate is welded, the I-beam is hoisted to the top of the steel pipe pile pile with a crane, and the beam is placed in the center of the pile top with No. 45 I-beam according to the design requirements to adjust the level, and is welded with the pile top steel cover plate after inspection.
7) Installation of longitudinal beams.
After the beam is installed, the No. 45 I-beam is installed according to the spacing of 100cm, and the intersection of the crossbeam is welded or made of steel bars to form a U-shaped longitudinal beam to fix the longitudinal beam on the beam.
8) Pavement panels.
After the longitudinal beam is installed, the pre-set No. 25 channel steel is directly laid on the longitudinal beam, and the bridge deck is installed smoothly, and there shall be no misalignment in the middle. And weld firmly with the longitudinal beams one by one.
9) Guardrail construction.
Both sides of the temporary bridge and vertical welding 12m high 70mm steel pipe, 3m spacing, every 05m high with 18 steel bars, spot welded with steel pipes. And set up night lights at the head of the temporary bridge, and paint red and white reflective paint on the guardrail to ensure construction safety.
10) Acceptance, testing and maintenance measures of the temporary bridge.
1. After the installation of the temporary bridge is completed, the project department shall organize the design unit, the resident office and the construction unit to accept the stability, strength and stiffness of the temporary bridge, and it can be put into use only after it is qualified.
11) Demolition and cleaning of temporary bridges.
The demolition of the steel temporary bridge is carried out in turn from the east bank of the river to the west bank according to the span, and the specific demolition sequence is: guardrail - bridge deck steel plate, channel steel - longitudinal beam - beam - steel pipe pile - abutment concrete, fill under the bridge.
1. The channel steel and I-beam of the bridge deck are manually cut by gas welding to separate them from other systems, and then loaded and transported by a 50t crane on the bridge deck of the XX extra-large bridge. In order to ensure the safety of the demolition personnel, life jackets, helmets, and safety belts must be worn during construction.
2. When the steel pipe pile is dismantled, a 50t crane is used to cooperate with the vibrating hammer to pull out, and the uprooting process is not forced to be constructed when it is difficult to lift, so as to ensure the safety of personnel and machinery. After pulling it out, it is directly loaded and transported away.
3. The concrete of the abutment is chiseled and crushed with a pickaxe or crushing hammer, and the waste concrete is transported to the designated dump with a loader or dump truck.
4. After demolition, the sidewalk filling in the river channel under the temporary bridge is loaded with an excavator and transported to the designated dump site to restore the original river channel.
3. Quality assurance measures for the construction of temporary bridges
After the completion of the steel bridge, it undertakes the transportation task of construction vehicles, and formulates the following guarantee measures to ensure the quality, quantity and safety of the steel bridge in a safe and timely manner
1. Conscientiously prepare the special construction organization design plan, make a comprehensive construction technical disclosure to the team, and ensure that the construction is strictly in accordance with the requirements of the design and construction technical specifications.
2. The steel bridge shall be carefully calculated and checked by the relevant personnel of the engineering department organized by the chief engineer, and submitted to the superior department for approval to ensure that the calculations meet the requirements of general use.
3. The construction of the steel bridge is strictly in accordance with the design calculation to guide the construction of the bracket, if the geological conditions of the site can not be constructed according to the design position, the technical personnel of the project department will first analyze and discuss on site, and then report the discussion results to the resident supervision office and relevant departments to decide the feasible construction plan.
Fourth, the safety assurance measures for the construction of temporary bridges
1. Prepare practical construction measures according to hydrogeological conditions.
2. After the completion of each construction process, the consent of the supervisor must be obtained before the next process can be carried out.
3. All engineering electricity should have a good grounding device, and install a leakage protector.
4. For all the personnel involved in the construction, the safety technology should be disclosed, and the safety measures should be emphasized, so that the personnel involved in the construction should be "well informed", master the safety measures, and do a good job in implementation.
5. All construction personnel on the site must accept the disclosure, and the welding parts must meet the design requirements.
6. The installation process must be equipped with an experienced crane driver, and the tonnage of the crane must meet the requirements of the installation processWhen installing steel pipe piles and punching holes, the wire rope and hook must be carefully inspected regularly, and replaced immediately if damaged.
7. The on-site construction personnel must wear safety helmets, and the construction personnel on the bridge must wear life-saving clothing, and it is strictly forbidden to wear slippers to work shirtless. Formulate a drowning emergency rescue plan, the staff must wear life jackets and safety helmets when working on the water, and the staff choose to be strong and strong, and the staff over 50 years old are strictly prohibited from working in the water.
8. Set up safety warning signs such as "front convenient bridge, slow down and slow down" and "speed limit 5km h" at the head and both sides of the bridge, and use sufficient lighting equipment during night construction.
9. Vehicles on the bridge are only allowed to pass in one direction, and no vehicles are allowed to meet, and special personnel are set up to direct the passage of vehicles.
10. Ensure that the performance of machinery and equipment is good, and the operators are certified to work.
Fifth, the maintenance of the construction bridge after the formation
1. The safety engineer often checks the stability of the temporary bridge, the tightness of the connecting screws and the weld, and repairs the weld in time to strengthen the welding.
2. Set up a hose light on the temporary bridge to ensure that it can continue to shine at night, prompting the ship to prohibit navigation.
3. Usually arrange special personnel to do a good job in the monitoring, observation, inspection and maintenance of the temporary bridge traffic command and the temporary bridge, and check the content: whether the steel bridge foundation has uneven settlement;Whether the deflection in the steel bridge span has increased;Whether the bridge deck is damaged, whether the various components are complete or loose. Problems are found and dealt with in a timely manner. Ensure that the connection is firm, the overall stability, and the safety warning signs are complete and effective.
4. In the event of a flood or typhoon, it is strictly forbidden for personnel and machinery to stagnate on the temporary bridge, and at the same time reduce the load on the temporary bridge.
5. Send someone to remove all kinds of water-blocking debris brought by the upstream of the temporary bridge in time to reduce the water flow impulse of the temporary bridge.
6. Set up speed limit and weight limit signs at the obvious position of entering the end of the steel bridge, and it is strictly forbidden for overloaded and speeding vehicles to pass.
7. During the flood season, a special person should be arranged to be responsible for observing the water level, and if any abnormal situation is found, it should be reported to the person in charge of the construction of the XX bridge in time.
8. When the erected steel temporary bridge affects the flood discharge, the demolition of the temporary bridge must be considered, and the demolition should be comprehensively arranged, and the mechanical personnel should be prepared to ensure the safety of personnel and materials in the demolition process.
Ground hardening. Construction of new ground
It can be divided into two types: concrete ground and wear-resistant ground. The former is to first construct the concrete above C-25 on the ground, leveling, calendering, and after collecting the light, cover it with plastic film, and after the curing period of 7 days, the concrete sealing curing agent can be sprayed. In order to see the strength as soon as possible after the curing agent is applied one day, one side of the reinforcing agent can be sprayed (about 20-30 square meters of kilogram construction). Then the ground is washed and polished to produce a bright and wear-resistant effect.
It is also possible to apply directly on freshly poured wear-resistant floors. The method is that after the construction of the wear-resistant floor is completed, after the seven-day curing period, the curing agent can be applied, and after one day, polish it to achieve the bright and wear-resistant effect of the ground, so that the wear-resistant floor will never be sanding, and at the same time resist oil penetration. It is also possible to apply a further reinforcing agent after the hardener has been applied to achieve a higher hardness. Due to the high compactness of the wear-resistant floor, the dosage of curing agent is 5-10 square meters per kilogram.
Construction of the old ground
It is necessary to first polish the ground to different degrees, remove the surface pollutants, swag, and cement slurry layer until the sand particles under the ground slurry are exposed, and the grinding process needs to be polished with water grinding discs of different particle sizes, with the lowest particle size of 50 mesh and the highest particle size of 3000 mesh. As the grain size changes from coarse to fine, the amount of grinding will gradually decrease, and the concrete surface will be smoother. When sanding, it is necessary to continuously add water and remove the mud generated by sanding. Once the sanding is complete and the surface is dry, the curing agent can be sprayed, and the next day, the floor can be finally polished. A booster can also be added.
Description: Grinding refers to the grinding behavior of grinding materials such as water grinding discs and diamond flakes on the ground with or without water. The amount of grinding is large. Polishing refers to the grinding behavior of using relatively soft, corundum-free plastic materials on the ground, which can be polished with water or without water. The amount of grinding is small, mainly to make the ground brighter.
Scaffolding works.
In view of the structural shape of this project, taking into account the characteristics of the exterior wall decoration and the installation of vertical transportation equipment, all the outer frames are double-row steel pipe fastener scaffolding, which is fully built along the outer edge of the structure.
1. Construction measures for steel pipe scaffolding
1. Erection parameters: pole spacing 12m, row spacing 11m, 300mm from the wall, large crossbar step distance 18m, small crossbar spacing 06m, the scissor brace is located on the outside of the scaffold, and all are continuously arranged along the length of the scaffold, and the transverse support is arranged along the height of the scaffold every 15m, and the discontinuous end must be set.
The scaffold step distance at the derrick should be adjusted appropriately to make it level with the floor.
2. The outer frame is erected on the backfill, so the backfill should be tamped within the erection range, and [16 channel steel] is added at the bottom of the pole, and the sweeping rod is added at 100 places under the pole, as shown in the following figure:
3. The scaffold should have a reliable continuity with the structure, and the connection method should be one top and one pull, and the side posts and external walls should be tightened and tightened.
4. The upper and lower layers of the operation layer are fully paved with scaffolding, and the construction layer is equipped with a foot guard, and the outer side is fully enclosed with a dense flame retardant safety net, and every three layers should be fully enclosed horizontally. Along the outer frame every six steps of the frame to unload to the structural layer, unloading using the steel pipe pull down the brace. After the unloading plan is calculated, detailed drawings are drawn to guide the construction.
5. At the entrance and export of personnel, materials and goods, the hole should be set aside when the outer frame is erected, and the fall fence or barrage should be erected above the hole, and the fall fence or barrage should also be erected on the outer edge of the road, and the safety scaffolding with a width of 4m wide is cantilevered around the top plate of the first floor, and a double-layer bamboo fence is laid on it to prevent falling objects from injuring people.
6. The demolition of the scaffold is written in detail, and the operator is disclosed, and the demolition sequence is carried out from top to bottom, and the wall point is dismantled synchronously with the scaffolding, and the warning area is set up when dismantling, and obvious signs are set up, and a special person is on duty.