Deep foundation pit supporting method of ultrahigh floor height type basement structure

A deep foundation pit support and basement technology, applied in the direction of infrastructure engineering, excavation, construction, etc., can solve the problems of difficult construction, low construction efficiency, and low safety, so as to improve construction efficiency, avoid boring demolition, and operate flexible effects

Active Publication Date: 2017-03-22
SHANGHAI CONSTR NO 1 GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a deep foundation pit support method for a basement structure with super large storey height, so

Method used

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  • Deep foundation pit supporting method of ultrahigh floor height type basement structure
  • Deep foundation pit supporting method of ultrahigh floor height type basement structure
  • Deep foundation pit supporting method of ultrahigh floor height type basement structure

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[0033] Example one

[0034] Combine below Figure 1 to Figure 5 Taking the deep foundation pit support of the super-high basement structure with three supports and each step of the foundation pit divided into three step areas as an example, the deep foundation pit supporting method of the super-high basement structure of the present invention will be described in detail. It should be noted that, in this embodiment, before the construction of the deep foundation pit supporting structure, the construction of the foundation pit's retaining structure 1, the steel lattice column 51 and the column pile 53 has been completed.

[0035] In this embodiment, the deep foundation pit has a three-step ladder type, and each step of the foundation pit is divided into a first step area, a second step area, and a third step area from top to bottom, and the area of ​​the foundation pit gradually decreases from top to bottom. Because the foundation pit is ladder-shaped, the area of ​​the foundation p...

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Abstract

The invention discloses a deep foundation pit supporting method of an ultrahigh floor height type basement structure, belongs to the technical field of building construction, and aims at solving the problems of high difficulty, low safety and low construction efficiency of the construction of an existing deep and large foundation pit supporting system. The supporting method comprises the following steps: 1, arranging a concrete support on the top part of an enclosure structure; arranging a trestle bridge; arranging a concrete support at a ladder of a large-area foundation pit; arranging a steel support at the ladder of a lower small-area foundation pit; 2, arranging concrete supports and steel supports in a plurality of ladder areas from top to bottom in a sequence; excavating earth in the foundation pit until reaching the foundation; and pouring a cushion layer and a base bottom plate; 3, constructing the outer wall of a basement and the base bottom plate of each ladder area from bottom to top; remaining the bottom steel support; sequentially removing the corresponding concrete supports; constructing corresponding steel replacing supports; supporting as dismounting until a beam board of a first floor layer of the basement is poured; and 4, dismounting the steel supports and the steel replacing supports in each ladder area from bottom to top in a sequence after the surroundings are densely backfilled.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a deep foundation pit support method for a basement structure with a super large story height. Background technique [0002] Existing support systems for deep and large foundation pits usually adopt concrete supports or steel supports, and each support is removed from bottom to top along with the construction of the foundation floor and the underground floor structure. However, the existing support system for deep and large foundation pits is not suitable for deep foundation pit projects with super large story height underground structures. The main reason is that in the deep foundation pit engineering of the super-large-story underground structure, the supports cannot be removed before the construction of the roof of the underground structure is completed, otherwise the underground wall will become a cantilever structure, which will affect its safety, and will also...

Claims

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Application Information

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IPC IPC(8): E02D17/04
CPCE02D17/04
Inventor 徐磊高文志申青峰朱刚徐益夕史建勋
Owner SHANGHAI CONSTR NO 1 GRP
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