A Foundation Pit Supporting Method with Zero Occupancy for Buildings in Dense Areas

A foundation pit support and building technology, applied in construction, soil protection, excavation, etc., can solve problems such as waste and loss of space use, and achieve the effect of saving cost, ensuring normal use, and simple materials

Inactive Publication Date: 2016-01-06
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the utilization of the underground space on the side of the foundation pit, these support structures undoubtedly caused loss and waste of space use

Method used

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  • A Foundation Pit Supporting Method with Zero Occupancy for Buildings in Dense Areas
  • A Foundation Pit Supporting Method with Zero Occupancy for Buildings in Dense Areas
  • A Foundation Pit Supporting Method with Zero Occupancy for Buildings in Dense Areas

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Embodiment Construction

[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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Abstract

The invention discloses a method for supporting zero-occupation foundation pits neighboring to buildings of agglomeration areas. The method includes that when a new foundation pit neighbors to the building, the ground beside the foundation pit is drilled with inclined holes by engineering machinery according to specific sequence, the inclined holes are drilled in the soil below the foundation of the neighboring building at the design depth, cement grout is ejected rotationally at high pressure to cut the soil around the holes, the cement grout and the cut soil can be stirred to form a cylindrical cement soil body via a series of orderly ejection, rotation and lifting, a cylindrical cement soil combination body arranged in order is obtained by curing, and a foundation pit support structure is formed below the foundation of the neighboring building. The method has the advantages that the support structure does not occupy the space of the foundation pit, supporting of the foundation pit, soil and water stopping, bearing and protection of the neighboring building are integrated, and the land area around the new foundation pit of the neighboring building in the agglomeration areas can be sufficiently utilized by 100%. The method is simple in structure, convenient to construct, reliable in supporting and reasonable in stress, and the neighboring building can be normally used in the course of construction of the foundation pit.

Description

technical field [0001] The invention relates to the technical field of foundation pit support in the civil engineering industry, in particular to a novel support method for foundation pits adjacent to buildings in urban dense areas. Background technique [0002] In recent years, my country's urbanization process has been accelerating, and urban construction has developed rapidly. A large number of various buildings and underground projects such as underground garages, underground shopping malls, subways, underground transportation hubs, and civil air defense facilities are built in dense urban areas, and foundation pit support projects can be seen everywhere. In densely built urban areas, foundation pit engineering is often adjacent to the surrounding existing buildings. In the face of such complex construction conditions, it is very important to take appropriate foundation pit support measures to ensure the safety of the foundation pit and surrounding buildings. [0003] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/04
CPCE02D3/126E02D17/04
Inventor 马建林赵兴权杨彦鑫张迎宾孙鹏
Owner SOUTHWEST JIAOTONG UNIV
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