Foundation pit construction method

Abstract

The foundation pit construction method of the present invention comprises the steps of: constructing a vertical enclosure structure around the foundation pit; installing horizontal steel supports on the enclosure structure; excavating earthwork to the bottom of the foundation pit; constructing the outer wall of the main structure on the horizontal steel supports Bind the steel skeleton of the exterior wall of the exterior wall of the main structure, pour concrete on the skeleton of the exterior wall to form the exterior wall of the main structure; cut off the part outside the surface of the exterior wall of the main structure from the horizontal steel support and disassemble it. The present invention uses steel support to replace the concrete support in the prior art, and, in the step of constructing the main structure outer wall, directly connects the outer wall reinforcement frame to the horizontal steel support, and pours concrete on the outer wall reinforcement frame to form the main structure outer wall ; After the concrete structure reaches its strength, the steel structure located outside the surface of the main structure's outer wall can be cut and disassembled. It avoids the problem of large peripheral deformation caused by removing the inner support or changing the support, which affects the safety of the pipeline, and has the advantages of simple operation and high safety.

Description

technical field [0001] The invention relates to the field of foundation pit construction, in particular to a foundation pit construction method. Background technique [0002] With the large-scale construction of the city, the surrounding environment of the foundation pit is becoming more and more complex. For example, there are subways, water supply pipelines, heating pipelines, power pipelines, etc. around the foundation pit, and the surrounding environment of the foundation pit has high requirements for environmental protection. [0003] The foundation pit support structure generally adopts a vertical enclosure structure plus an internal support system. The foundation pit is excavated, and the support is excavated. After excavation to the bottom of the pit, the main structure is constructed. Remove the internal support or replace the support, and then continue the construction of the main structure. However, the surrounding environment of the foundation pit is complex and...

AI Technical Summary

Problems solved by technology

[0004] Concrete supports are self-heavy, complex to dismantle in the structure, high cost, generate a lot of waste, require high mechanical requirements, require a large construction space, generate vibration during dismantling, and are not conducive to the protection of finished products

[0005] Therefore, it is necessary to provide a solution to avoid the large deformation of the surrounding area caused by the removal of the inner support or the replacement of the support in the foundation pit with complex surrounding environment and high environmental protection requirements, which will affect the safety of the pipeline.

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