Rapid pipe joint mounting device and advanced small pipe construction method

Abstract

The invention discloses a rapid pipe joint mounting device and an advanced small pipe construction method. The rapid pipe joint mounting device comprises a pipe joint body, a clamping mechanism and arapid joint, and a front end pipe, a grout stop valve and a rear end pipe are sequentially connected to form the pipe joint body. The construction method includes the steps: first, mounting a plurality of advanced small pipes; second, mounting the rapid pipe joint mounting device at the end of one advanced small pipe; third, connecting a grouting pipe onto the rapid joint of the rapid pipe joint mounting device; fourth, starting grouting; fifth, stopping grouting and disconnecting the grouting pipe and the rapid joint; sixth, detaching the rapid pipe joint mounting device; seventh, repeating the second step to the sixth step more than once. The rapid pipe joint mounting device and the advanced small pipe are firmly and reliably connected, the rapid pipe joint mounting device and the grouting pipe are firmly and reliably connected, the rapid pipe joint mounting device is convenient to detach and simple to operate and can be recycled, the labor intensity of operators is reduced, construction progress is accelerated, and construction cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction, and relates to a joint device used in the construction of a tunnel advanced small conduit, in particular to a quick-install pipe joint device and an advanced small conduit construction method. Background technique [0002] The Sichuan Ganzi 317 National Highway Queershan Tunnel constructed by China Railway First Bureau Group Fourth Engineering Co., Ltd. is currently the world's first high-altitude super-long road tunnel. The tunnel site is located on the western Sichuan plateau at an altitude of 4,300 meters. The construction area is high in altitude, harsh in weather, and high in environmental protection requirements. The oxygen content and air pressure are only 60% of the normal value. The length of the main tunnel of Queershan Tunnel is 7,079 meters, and the length of the horizontal guide is 7,108 meters. The main entrance of the exit is 3,530 meters, the horizontal guide is 3,576 ...

AI Technical Summary

Problems solved by technology

Affected by low air pressure and low oxygen content environment, the efficiency of construction equipment and personnel is seriously reduced

There are three ways to connect the grouting pipe and the small advance conduit in the traditional construction of the small advance conduit in the tunnel. The first is to weld the pipe head at the end of the small advance conduit, and use lead wire binding or clamps to fix the connection. The connection method has the disadvantage of grout leakage, and the binding or clamping operation is complicated, which wastes materials and cannot ensure a firm and stable connection; The threaded connection at the end of the conduit, this connection method has a good grouting effect, solves the problem of grout leakage in the first method, and the connection is stable and firm, but it is necessary to process threads inside or outside the end of each leading small conduit, increasing A large amount of work and high cost investment; the third method is to insert a section of rubber sealing tube between the grouting pipe and the small leading conduit, and then tie the two ends of the rubber sealing tube to the The grouting pipe is fixedly connected to the advanced small conduit. This connection method has a large workload and complicated operations on site, and has the disadvantage of wasting materials; Small conduit construction method

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