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Construction method for tunnel drainage ditch

A construction method and drainage ditch technology, applied in drainage, earthwork drilling, pipeline laying and maintenance, etc., can solve problems such as arch foot extrusion inward, instability, soil instability and support as a whole

Pending Publication Date: 2021-07-09
CHINA MAJOR BRIDGE ENERGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The embodiment of the present application provides a construction method for tunnel drainage ditch to solve the inward extrusion of arch feet, soil instability and overall initial support caused by excessive excavation of the central deep-buried ditch in the related art instability problem

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  • Construction method for tunnel drainage ditch

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Embodiment Construction

[0035] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all of them. Based on the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present application.

[0036] The embodiment of the present application provides a construction method for tunnel drainage ditches, which can solve the problem of using open-cut construction for deep-buried ditches in the center. Lead to the overall instability of the initial support.

[0037] see figure 1 , figure 2 with Figure 4 As shown, the embodime...

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Abstract

The invention relates to a construction method for a tunnel drainage ditch, and belongs to the technical field of cold region tunnel construction. The method comprises the steps that after a tunnel is excavated and preliminarily supported to a set length, a pipe jacking working well is vertically excavated at the bottom of the tunnel to serve as a starting well; hardening treatment is conducted on the well wall and the well bottom of the pipe jacking working well; drainage holes are formed in the well wall of the pipe jacking working well, an annular water collecting tank is reserved at the well bottom of the pipe jacking working well, and drainage facilities are arranged in the annular water collecting tank; a counter-force base and jacking equipment are installed in the pipe jacking working well, and the jacking equipment jacks and pushes prefabricated concrete pipes to the set length section by section in the extending direction of the tunnel to form a deep buried ditch; and after pipe jacking construction is completed, steel bars are bound in the pipe jacking working well, and concrete is poured to seal a well mouth of the pipe jacking working well. According to the method, the deep buried ditch is constructed at the bottom of the tunnel through the pipe jacking technology, and damage of open excavation construction to the tunnel arch springing, the arch crown and the preliminary supporting structural strength is avoided.

Description

technical field [0001] The present application relates to the technical field of tunnel construction in cold regions, in particular to a construction method for tunnel drainage ditches. Background technique [0002] Tunnels are underground projects, and groundwater exists in the surrounding strata. At present, most of the tunnels built in our country belong to mountain tunnels. Water leakage and tunnel pavement damage are common diseases in the operation stage of mountain tunnels. The setting of the waterproof and drainage system of highway tunnels follows the principle of "combining prevention, drainage, interception and blocking, adapting measures to local conditions, and comprehensive treatment" to ensure the normal use and driving safety of tunnel structures and operating equipment. The waterproof and drainage design of the tunnel should properly handle the groundwater. A complete and smooth waterproof and drainage system should be formed inside and outside the tunnel. ...

Claims

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Application Information

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IPC IPC(8): E21F16/02F16L1/028
CPCE21F16/02F16L1/028
Inventor 郑俊张明娄西慧王腾飞郑国富陆金海方亮陈涛周小涵
Owner CHINA MAJOR BRIDGE ENERGINEERING
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