[Background information].
A construction unit undertakes the construction of a highway pavement project, the project is located in a hilly area, belongs to the first monsoon climate, the local road network is developed, and the transportation is more convenient. The design speed is 100kmh, two-way four-lane, and the main line is 15km long. The starting and ending stations are K15+000 K30+000, and the width of the carriageway is 375m。The main engineering contents are: hydraulically stabilized subbase, hydraulically stabilized subbase, asphalt concrete surface course and pavement drainage, etc., and the pavement structure is shown in Figure 1-1.
The following events occurred during the construction process:
Event 1: Before the construction of the pavement project, in the special construction plan prepared by the construction unit, the construction safety assurance measures include technical measures, monitoring and monitoring, etc., and before the implementation of the special plan, the project shall be disclosed in accordance with the requirements. At the same time, the construction site management personnel made a safety technical disclosure to X, which was jointly signed and confirmed by both parties and Project Y.
Event 2: During the construction of each layer of the pavement, the project department introduced the following main machinery and equipment: water stabilized mixing station, asphalt mixture mixing station, fiber delivery machine, transport vehicle, loader, paver, road roller, cement slurry spreader, vibratory compaction machine, intelligent asphalt spreader, etc. K17 + 100 K17 + 500 section of the base layer in the process of health ** shrinkage cracks. After bending detection, the bearing capacity of the structural layer meets the design requirements, and in order to prevent the occurrence of quality diseases in the later stage, the technicians have taken joint filling treatment measures.
Event 3: In the construction of the surface layer, part of the construction unit's practices are as follows: Before the construction of the middle surface layer, the construction unit completed the bidding work of the finished modified asphalt, and selected a strong businessman, and the construction unit required the supplier to provide two technical information about the modifier and matrix asphalt when supplyingThe middle surface course construction adopts two paver echelon operation, and after the paving operation is completed on the same day, the transverse joint is set by miter jointThe asphalt dosage in the upper layer of asphalt mastic gravel mixed material mix ratio design is high, before the official start of the construction of the upper layer, the construction unit selected the 200m road section as the test section, and used the tire roller for rolling construction.
Event 4: K20+000 K25+000 section has the conditions for advance construction, and the construction unit decided to divide the subbase and base of the section into 4 construction sections for flow construction, and the duration is shown in Table 1. After the completion of the construction of the base, the lower, middle and upper layers are not segmented to organize the sequential operation, the construction time of each layer is 4 days, and the technical intermittent between the subbase and the base, the base and the lower layer is 4 days.
Question] 1 Supplement the other two main contents of the construction safety assurance measures in Incident 1. Write the name by x, y. 2.Supplement the mechanical equipment required for the construction of each layer of the pavement in the second incident, and write the other two measures for the treatment of shrinkage cracks in the base layer. 3. Write the names of the two technical materials in Incident 3 and judge them one by oneIf you don't write it correctly, write the right thing to do. 4. According to the known conditions in event four, calculate the construction period of K20+000 K25+000 section of pavement, and improve the horizontal diagram of base layer and lower layer in Figure 2. First Class Constructor