Rectangular pipe jacking construction method for outlet and inlet channel of subway station

Abstract

The invention provides a rectangular pipe jacking construction method for an outlet and inlet channel of a subway station. The construction method specifically comprises the steps of constructing an initial well and a receiving well, calculating and determining jacking parameters, smearing wax on the outer wall of a pipe before jacking, connecting a head of a pipe jacking machine and three adjacent pipe sections into a whole during jacking, simultaneously injecting pressure injection thixotropic slurry into the back of the pipe sections in the jacking process, and arranging a stopping device to prevent the pipe jacking machine from retreating; erecting a receiving platform to receive the pipe jacking machine, after the jacking construction is finished, plugging pipe section gaps and the gaps between the pipe sections and two end openings, and finally adding cement slurry to replace the thixotropic slurry to consolidate a pipe jacking channel. It is ensured that the underground pipelinedoes not settle, crack, leak or the like, and compared with construction of a traditional open excavation method, the construction method has the advantages of small environmental impact, safe construction, simple operation, single procedure, low manufacturing cost, cost saving and good popularization significance.

Description

technical field [0001] The patent of the present invention relates to the construction of subway stations, specifically a construction suitable for complex stratum structures, shallow buried depths, adjacent buildings (structures), close tunnels, limited ground conditions, strict control of surrounding settlement, and construction period. Rectangular pipe jacking construction method for the entrance and exit passages of subway stations under the conditions of tightness and important pipelines below. Background technique [0002] With the rapid development of my country's economy, major cities are vigorously promoting the construction of subways to enhance the overall image of the city. The fast and good construction of subways is a major livelihood project with far-reaching significance. However, the construction of subway stations is often in the bustling areas of the city. With the continuous development of the subway industry, the utilization rate of urban underground spa...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the objective conditions of the current urban environment, the present invention proposes a rectangular pipe jacking construction method for the entrance and exit passages of subway stations. Quickly and safely pass through the municipal pipeline at a short distance, and can solve the problem of difficult relocation of the entrance and exit pipelines, and can effectively guarantee the construction period and control the construction safety and quality

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