Fixing structure and pre-embedment construction method for pre-embedded channel for duct piece in subway shield zone

Abstract

The invention provides a fixing structure for a pre-embedded channel for a duct piece in a subway shield zone. The pre-embedded channel can be fixedly mounted on a duct piece mold bottom arc plate bythe aid of multiple fixing structures; the pre-embedded channel comprises arc-shaped channel steel and multiple anchor rods fixed to the closed end of the arc-shaped channel steel; each fixing structure comprises a positioning nut, a positioning threaded rod and a locking screw; the positioning threaded rods penetrate through corresponding mounting holes in the arc-shaped channel steel and corresponding positioning holes in the duct piece mold bottom arc plate during mounting; each positioning nut penetrates through the corresponding mounting hole in the arc-shaped channel steel to screw and position one end of the corresponding positioning threaded rod on the closed end surface of the arc-shaped channel steel during mounting; and each locking screw is in threaded connection with the otherend of the corresponding positioning threaded rod in a sleeving manner to lock the other end of the corresponding positioning threaded rod on the duct piece mold bottom arc plate during mounting. Theinvention further provides a pre-embedment construction method for the pre-embedded channel for the duct piece in the subway shield zone. Hole drilling on the duct piece is avoided, the integrity ofthe duct piece structure is guaranteed, and the life of the project is prolonged.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a segment pre-embedded channel fixing structure and a pre-embedded construction method in a shield section of a subway. Background technique [0002] With the acceleration of China's urbanization process, the pressure brought by the increase of urban population to urban traffic is becoming more and more obvious. Therefore, urban rail transit has developed rapidly as a new channel to solve urban traffic pressure. In order to meet the operational functions and disaster prevention requirements of urban rail transit, more than a dozen pipelines and equipment such as power supply, communication, signal, and fire protection need to be installed in the interval. Frequent, tight construction schedule, complex mechanical and electrical installation, poor working environment, easy to damage segments and other shortcomings. Contents of the invention [0003] The purpose of th...

AI Technical Summary

Problems solved by technology

In order to meet the operational functions and disaster prevention requirements of urban rail transit, more than a dozen pipelines and equipment such as power supply, communication, signal, and fire protection need to be installed in the interval. Disadvantages such as frequent, tight construction period, complex electromechanical installation, poor working environment, and easy damage to segments

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