Foundation pit earthwork construction method for civil air defense engineering

Abstract

The invention relates to a foundation pit earthwork construction method for civil air defense engineering, and belongs to the technical field of civil air defense engineering construction. The foundation pit earthwork construction method for civil air defense engineering comprises the steps that step 1, after surveying and setting out of a deep foundation pit are completed, the deep foundation pit is divided into M areas from south to north, each area is divided into N<q> construction sections from west to east, and the corresponding mark number of each construction section is defined as MN<q> (p is larger than 2, q is larger than 4, and p and q are both positive integers); step 2, before the corresponding construction section is excavated, precipitation pipe well construction is conducted on the construction section; step 3, according to a foundation pit design drawing, excavation is conducted in a partitioned, segmented and layered mode from west to east in a backward sequence; when a (q-1) th foundation pit is excavated, layered excavation is carried out from west to east, excavation sections are M<1>N<q-1>, M<2>N<q-1>... MN<q-1> sections, excavation sections of a qth foundation pit are M<1>N<q>, M<2>N<q>... MN<q> sections, layered excavation is carried out from south to north, and riding tracks are arranged at the M<1>N<q> section; and step 4, according to the mode in step 3, excavation of the foundation pit is completed. The construction efficiency can be improved, and the construction quality is guaranteed.

Description

technical field [0001] The invention relates to the technical field of civil air defense engineering construction, in particular to an earthwork construction method for a civil air defense engineering foundation pit. Background technique [0002] Civil air defense projects, referred to as civil air defense projects, refer to underground protective buildings built separately to ensure the concealment of personnel and materials, civil air defense command, and medical rescue in wartime, and basements built in combination with ground buildings that can be used for air defense during wartime. [0003] The foundation of civil air defense projects is often a deep foundation pit. A deep foundation pit refers to an excavation depth of more than 5 meters (including 5 meters) or a basement with more than three floors (including three floors), or a depth of less than 5 meters, but the geological conditions and the surrounding The environment and underground pipelines are particularly co...

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Problems solved by technology

[0004] In the above construction plan, due to the direct excavation of earthwork, when constructing on some complex foundations with relatively large water content, the groundwater in the foundation pit has not been effectively treated, so it is easy to cause foundation settlement, and even cause serious safety accidents, and the construction is not safe enough At the same time, the above-mentioned construction plan is to excavate the earthwork layer by layer and build the foundation pit support structure layer by layer. The construction of the foundation pit support structure in this scheme requires multiple times, repeated disassembly and assembly, and the construction period is relatively long

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