Foundation Pit Construction Method Combining Upside-Down Method and Steel Support

Abstract

The foundation pit construction method combining the upside-down method and the steel support of the present invention includes the steps of: setting the support position of the horizontal steel support to be supported; constructing a vertical enclosure structure, and the enclosure structure is arranged on the periphery of the foundation pit to be excavated ; Construct a horizontal structural roof, the structural roof is set on the top of the foundation pit to be excavated and connected to the enclosure structure; excavate the earthwork downwards to the support position; support the horizontal steel support at the support position, and connect the horizontal steel support On the enclosure structure; continue to excavate the earthwork to the bottom of the foundation pit; construct the outer wall of the main structure, bind the outer wall steel skeleton of the outer wall of the main structure on the horizontal steel support, and pour concrete on the outer wall steel skeleton to form the outer wall of the main structure ; Cut and disassemble the part located outside the surface of the main structure's outer wall from the horizontal steel support. It avoids the processing of brace replacement, and avoids the problems of complex processing operation, many safety hazards in demolition work, difficult cleaning and high cost caused by brace replacement, 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 combining an upside-down method and steel support. Background technique [0002] In order to save the construction period, protect the environment and save resources, some foundation pits are constructed by reverse method. However, due to the large clearance of the underground structure of some projects, there is no beam slab in the middle of the structure. During the reverse construction, only the structural roof of the first floor plays a supporting role, and the outer wall and bottom slab of the main structure of the structure are not constructed. The enclosure structure cannot meet the requirements of earthwork excavation, and in severe cases, it may lead to instability of the foundation pit. [0003] The traditional method is to add concrete inner supports near the middle of the structure to meet the requirements of earthwork e...

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Problems solved by technology

[0005] In order to solve the problems of complex bracing replacement operation, many safety hazards in demolition work, difficult cleaning and high cost caused by the use of concrete supports in the construction of the upside-down method, the invention provides a foundation pit that combines the upside-down method and steel supports Construction method

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