Construction method for newly-built large deep foundation pit basements under protection building

Abstract

The invention provides a construction method for newly-built large deep foundation pit basements under a protection building. According to the construction method, on the premise that the protection building is not disassembled, within a limited foundation range, a mature building translation technology and a reverse foundation pit construction method are combined, and overall construction of the first-region and second-region basements is directly performed after the protection building and a top plate of the first-region basement are connected in an anti-seismic butt joint mode. On the basis of guaranteeing structural stability of the protection building, construction working conditions and construction steps of the basements are reduced, the construction period is shortened, safety and stability of the protection building are improved, overall construction quality and efficiency are improved, ambient environment is effectively controlled, the number of dividing strips between first and second regions is reduced, and time benefits, space benefits and stable benefits are maximized.

Description

technical field [0001] The invention relates to the construction field, in particular to a construction method for building a large-scale deep foundation pit basement under a protected building. Background technique [0002] At present, the translation technology of housing engineering (including structures, etc.) generally adopts underpinning forms such as upper sliding beams and lower beams, and the translation is carried out after the structure is consolidated. According to the overall weight of housing engineering (including structures, etc.), the foundation form is determined, and the basic translation is to On newly built pile foundations, piled raft foundations and strip foundations. [0003] However, the construction method of building a new large-scale deep foundation pit basement under a protected building (with a certain historical age and historical value, such buildings or structures that do not consider demolition, need to be protected, or preserved), consideri...

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Problems solved by technology

[0004] However, the existing construction method of building a new large-scale deep foundation pit basement under a protected building has many construction steps, a long construction period, and a long time for the foundation pit to be exposed, which is not conducive to the stability of the surrounding environment and the quality and efficiency of basement construction. , In addition, the construction of the partition underground diaphragm wall will also cause vertical and horizontal stress effects on the protected building, thereby reducing the structural strength of the protected building and increasing the possibility of cracking of the protected building, which is even more unfavorable to the protection of the protected building

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