Method for foundation-pit vertical supporting piece to serve as bearing pile

Abstract

The invention discloses a method for a foundation-pit vertical supporting piece to serve as a bearing pile. The method includes the following steps of A), embedding connecting pieces in the foundation-pit vertical supporting piece; B), excavating a foundation pit to the pit bottom of the predetermined depth, connecting the foundation pit with an externally-connected ground beam and anchor joints through steel bars by the aid of the connecting pieces in the supporting piece, pouring concrete on the externally-connected ground beam and the anchor joints, and reserving anchored steel bars in the anchor joints so as to anchor the steel bars into a underground cavity baseboard; C), binding the steel bars of the underground cavity baseboard after waterproof layers and protecting layers of the same at the positions such as the underground cavity baseboard are completed, adjusting the positions, reserved by the anchor joints, of the anchored steel bars, and casting the cavity baseboard to enable a underground cavity and the externally-connected ground beam to be integrally formed; D), performing construction of remaining underground cavity structures. By the method, occupation of underground space is controlled to the greatest extent, and limited underground space resources are fully excavated; construction costs can be saved and construction period can be quickened as compared to arrangement of the bearing pile, and all-inclusive waterproofness of the underground cavity can still be constructed according to a conventional method.

Description

technical field [0001] The present invention is applicable to the method of utilizing the vertical supporting components of the foundation pit as load-bearing piles in the construction of cast-in-place reinforced concrete underground structures such as tunnels, subway stations and other underground caverns by the open-cut method. technical background [0002] For the all-inclusive waterproof underground caverns constructed by the open cut method, when the vertical bearing capacity of the foundation is insufficient or the anti-floating does not meet the requirements, pile foundations can be set on the bottom plate to meet the requirements. If the anti-floating does not meet the requirements, it may be considered to set up pile foundations under the cavern floor or to set up pressure beams between the cavern roof and the support components to utilize the vertical bearing capacity of the support components. For underground caverns that do not consider the construction of the al...

AI Technical Summary

Problems solved by technology

When the new underground cavern structure needs to reserve the implementation space of other underground buildings and structures, or when the underground cavern structure is adjacent to the existing underground buildings and structures, new construction is required, or various pipelines need to be set up next to the underground cavern, the underground cavern The structure cannot be equipped with pile foundations or top beams to meet the requirements of vertical bearing capacity; while the underground caverns require full waterproofing, it is not convenient to use the method of directly connecting the steel bars reserved in the support structure with the side walls of the underground caverns to meet the requirements of the underground caverns. Chamber vertical bearing capacity requirements

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