Prestress supporting structure used in long-strip rectangular foundation pit

Abstract

The invention relates to the technical field of building construction, in particular to a prestress supporting structure used in a long-strip rectangular foundation pit. The prestress supporting structure comprises the foundation pit, and multiple supporting devices arrayed side by side are installed in the foundation pit. Two supporting frames are movably arranged on a base of each supporting device, a supporting frame folding and unfolding mechanism is arranged between the two supporting frames and used for unfolding and folding the two supporting frames, so that the distance between the twosupporting frames and horizontal supporting steel frames is adjustable, and the supporting requirement for foundation pits different in width can be met; three horizontal supporting steel frames arevertically arranged on each supporting frame so that the vertical position of the two upper and lower horizontal supporting steel frames can be adjusted through supporting steel frames on a supportingsteel frame, the supporting requirement for the foundation pits different in width can be met, the supporting requirement for the different foundation pits can be met through the method, the application range of the device is greatly broadened, and practicability is improved.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a prestressed support structure for a long rectangular foundation pit. Background technique [0002] Most of the existing foundation pit support methods adopt the method of setting reinforced concrete purlins around the foundation pit, and then arranging mesh steel pipe supports on the inner periphery of the purlins. The disadvantages of this support method are: 1. The amount of steel pipes Large, troublesome to install and dismantle, and takes up a lot of space, which is not conducive to the excavation of earth in the foundation pit, and cannot well apply prestress to the side wall of the foundation pit, and the support strength is low. Usually, the support force can only be increased by increasing the density of the steel pipe arrangement ; 2. Due to different foundation pits, the width of the pit opening and the depth of the pit groove are inconsistent. When supp...

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Problems solved by technology

[0002] Most of the existing foundation pit support methods adopt the method of setting reinforced concrete purlins around the foundation pit, and then arranging mesh steel pipe supports on the inner periphery of the purlins. The disadvantages of this support method are: 1. The amount of steel pipes Large, troublesome to install and dismantle, and takes up a lot of space, which is not conducive to the excavation of earth in the foundation pit, and cannot well apply prestress to the side wall of the foundation pit, and the support strength is low. Usually, the support force can only be increased by increasing the density of the steel pipe arrangement ; 2. Due to different foundation pits, the width of the pit opening and the depth of the pit groove are inconsistent. When supporting different foundation pits, different numbers of steel pipes need to be used for support processing operations, and the size requirements for the steel pipes are also different. Similarly, this leads to a low reuse rate of steel pipes, indirectly resulting in high costs for foundation pit support, and will consume a lot of manpower and material resources in the entire disassembly process, increasing labor costs, which is not only uneconomical but also scientific and environmentally friendly.

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