Foundation pit support of rotary bored pile?

The foundation pit support of rotary bored pile is very important, and every detail is crucial. Only in concrete construction can the quality be guaranteed, so we should pay attention to it. Zhong Da Consulting will briefly introduce the foundation pit support of rotary bored piles.

A, the construction general layout

According to the site conditions, the temporary structures, steel bar storage and production site, drilling slag stacking site, mud pit layout and water and electricity line layout are reasonably arranged, so that the layout is reasonable, neat and beautiful.

Second, the construction site leveling.

1. Foundation pit and access road: special concrete construction road will be built on the construction site to meet the requirements of construction equipment and materials entering the site; After the working face in the construction foundation pit is leveled, the foundation is compacted with concrete. According to the actual situation on site, arrange the position of mud pit and muck pile to ensure the cleanliness of site construction. After the living area is leveled at the original height, it is paved with brick slag to facilitate the passage of construction personnel.

2. Water and electricity for construction

(1) Construction water: According to the temporary water connection point (outlet of dewatering well) provided by the owner, use 1 inch semi-pipe to connect to all construction and domestic water points. Construction production wastewater can only be discharged into the sewage pipeline designated by the owner after precipitation.

⑵ Power consumption for construction: The total power consumption for on-site construction is more than 500KVA, and the construction site and the reinforcing cage production site are both equipped with secondary power distribution, and the electrical equipment is connected by cables.

Three. Overlay facilities and mud pit layout According to the site conditions, the office of the project department and the living quarters of construction workers shall be reasonably arranged, cotton sheds shall be set up in the office and living quarters, and the storage sites for steel bars, steel bars processing and steel cages shall be leveled. When steel bars and cages are stored, they are lifted by wooden machines, and the cages are equipped with operating platforms. Each rotary drilling rig is equipped with a mud pit. See the construction layout for the preliminary position. During construction, it is transported by mud pump and hauled by closed mud truck. In the later construction process, if the mud pit is not adjusted enough, a mud pit can be temporarily added in the unhardened area of the foundation pit according to the actual situation. Because the construction site is large and the site outside the foundation pit is narrow, the drilling slag stacking place is located in the foundation pit, which will not affect the construction and haulage of drilling slag. In the process of construction, it is transported from the foundation pit to the open water surface by loader to dry, and then transported abroad.

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