Pipe-jacking working well applicable to desert waterless sand area and construction method

Abstract

The invention provides a pipe-jacking working well applicable to desert waterless sand area and a construction method. The pipe-jacking working well is characterized in that a plurality of bore pilesare circumferentially uniformly arranged around the circle center the working well to form the main protecting and stress structure of the working well, a crown beam is arranged at the top of each bored pile, each circular crown beam and the working well are of a concentric circle structure, a liner is located on the inner side of each bored pile and vertically arranged along the depth direction of the working well, hidden beams are embedded into each liner and arranged at intervals along the length direction of the liner from top to bottom, a bottom plate is located at the bottom of the working well, a well bottom reinforcing jet grouting pile is arranged below the bottom plate, and hole reinforcing jet grouting piles located at positions where jacking pipe joints enter and exit holes arearranged on the outer sides of the bored piles. The pipe-jacking working well has the advantages that soil stability during excavation can be guaranteed by the bored piles, and the bored piles can bear large counter force needed by pipe-jacking construction; the liners can increase sand stability among the piles and evenly transmits horizontal load to the bored piles.

Description

technical field [0001] The invention belongs to the technical field of pipe jacking construction, and in particular relates to a pipe jacking working well and a construction method suitable for an anhydrous sand layer area in a desert. Background technique [0002] Pipe jacking construction is a pipeline facility construction technology that does not excavate or excavates less. Pipe jacking construction is an underground pipeline construction method developed after shield tunneling construction. It does not need to excavate the surface layer, and can cross roads, railways, rivers, ground buildings, underground structures and various underground pipelines. With the further acceleration of the urbanization process, the demand for underground pipelines in my country is also increasing year by year. Coupled with the enhancement of people's awareness of environmental protection, pipe jacking technology plays an increasingly important role in the construction of underground pipel...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the relatively large horizontal jacking force during the pipe jacking construction in the desert anhydrous sand layer area in the above-mentioned prior art, but the existing working well structure and construction method can not meet the requirements in this respect

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