Method for supporting zero-occupation foundation pits neighboring to buildings of agglomeration areas
A foundation pit support and building technology, applied in construction, soil protection, excavation and other directions, can solve the problems of space loss and waste, and achieve the effect of saving cost, ensuring normal use and simple materials
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[0021] When using the method of the present invention for construction, the basic process is: 1. When the foundation pit is close to the building, use a special machine with high-pressure rotary spraying on the ground on one side of the foundation pit to drill inclined holes in a specific order, and the inclined holes are drilled to the next to the building. The design depth in the soil layer under the building foundation; 2. Then implement high-pressure rotary spraying of cement slurry in the hole to cut the soil around the hole. By spraying, rotating and lifting the drill pipe in an orderly manner, the sprayed cement slurry and the cut soil are stirred to form a cylindrical cement soil; The interlocking cylindrical cement-soil combination forms a foundation pit support structure immediately below the foundation of the building that can bear the upper load of the adjacent building, can support the retaining soil, and can stop water; 4. Excavation of the foundation pit, remove...
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