Attention engineers! You must understand these four engineering quantity coefficients, it is recommended to collect, and if necessary, open your mouth to come!
Concrete dosage
The first is concrete, like the average high-rise residential building, the amount of concrete used in the shear wall structure is equal to the floor area multiplied by 03~0.34, which is all cast-in-place; If it is a project with a PC, such as a prefabricated staircase with laminated panels, it will be a little less, 026~0.28。
Then there is the frame structure, the amount of concrete, which is equal to the floor area multiplied by 023~0.25。Finally, there is the basic raft and roof of the garage, which is closely related to the thickness of the board. Of course, there is a special point to pay attention to, that is, the calculated amount does not need to be deducted from the steel system, do not deduct the steel bar.
Amount of reinforcement
The second is the amount of steel bars, first of all, the underground, the general underground garage 120 140kg per square meter, if it is with civil air defense will be higher than 20 30kg, that is, 160 180kg per square meter; Let's talk about the above-ground multi-layer brick-concrete structure, with a steel content of 225 kilograms per square meter. There are two situations in the high-rise, seismic fortification above 7 °, 42 48kg above 7 °, and 54 58kg per square meter.
Generally speaking, because Party A has strict control over the cost of the project, the design institute will not put too much conservative coefficient, and it is basically sticking to the offline line.
Template usage
The first is the aluminum film, shear wall structure, which is generally the floor area multiplied by 32~3.3。If there are more hanging beams with aluminum film deepening belts, structural columns, lintels, etc., 34~3.5；There are also some projects, its exterior wall is made of full concrete, can go to 38 or more, and even to 40。
After talking about aluminum film, let's talk about wood film, the general frame structure is the construction area multiplied by 18~2.3. The shear wall structure is the floor area multiplied by 31~3.2. It is calculated according to the sticky gray surface.
Block dosage
For example, the common block is about 500 high-rise residential buildings, and the general installation capacity is 100 120 cubic meters. Convert the amount of loading per square meter to 02~0.22 squares, this is just bricks, plus structural columns, lintels, frame-hugging columns, etc., after the concrete is built, at 0Around 28, if it is a frame structure, it will be 015~0.18。
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