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A kind of drainage construction technology of seasonal frozen soil tunnel

A technology for tunnel drainage and construction technology, applied in tunnels, drainage, tunnel lining and other directions, can solve problems such as safe driving problems, and achieve the effects of less construction equipment, simple construction technology, and short construction period.

Active Publication Date: 2018-09-28
CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP OF THE FIFTH ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, although my country has made a lot of achievements in tunnel construction and made progress in tunnel waterproofing and drainage, there are still many problems in tunnel waterproofing and drainage to varying degrees, which pose a great problem to safe driving.

Method used

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  • A kind of drainage construction technology of seasonal frozen soil tunnel

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Comparison scheme
Effect test

Embodiment 1

[0021] like figure 1 As shown, a seasonal frozen soil tunnel drainage construction process, and the process is mainly suitable for tunnel road tunnel waterproof and drainage construction under complex geological conditions in seasonal frozen soil areas, the construction process mainly includes the following steps:

[0022] (1) Measurement stakeout, measure and release the center line of the tunnel, every 5.0m, measure and release the plane position of the longitudinal drainage pipe, every 5m, and use a level to measure the design elevation of the bottom of the longitudinal drainage pipe, measure and release the side line of the short side wall, every 5m One point, and use a level to measure the elevation of the top of the short side wall, calculate the elevation of the top of the short side wall according to the template of the trolley, and the elevation of the top of the short side wall is 20cm lower than the top of the cable trench;

[0023] (2) Install longitudinal drainage...

Embodiment 2

[0031] This embodiment is further limited on the basis of Embodiment 1. The installation method of the water stop in the step (5) is: 5-1. According to the thickness of the lining, the water stop is placed in the middle of the head plate, and the water stop is located at In the center of the lining concrete, drill holes on the headstop close to the waterstop at intervals of 70-90cm; Half, the other half of the waterstop is in contact with the headstop; 5-3. After the concrete solidifies, the headstop is removed, the waterstop is straightened and leveled, and the bent steel bars are clamped on the waterstop. Before pouring concrete, the construction joints are manually chiseled and washed with high-pressure air, and then the next slab of second-lined concrete is poured.

Embodiment 3

[0033] This embodiment is further limited on the basis of the above-mentioned embodiments. The specific method for the construction of the circumferential drainage pipe in the step (2) is: adopt the advanced water exploration and geophysical exploration method to determine the distribution of underground water in front of the tunnel face, and perform pre-grouting Blocking, this operation method is mainly aimed at the water gushing and water inrush sections in the tunnel, that is, the water gushing section formed by tubular water seepage in the tunnel during the rainy season.

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Abstract

The invention discloses a drainage construction technology for a seasonally-frozen ground tunnel. The technology includes the following steps that 1, staking out in survey is conducted; 2, longitudinal drainage pipes, transverse drainage pipes and annular drainage pipes are installed; 3, the rock surface and the concrete surface of a primary support are trimmed; 4, a waterproof board is installed; 5, a stopper plate and a water stop are installed. The construction technology is simple, the number of construction devices is small, the construction period is short, and the technology has a guide effect on waterproof and drainage construction of the seasonally-frozen ground region tunnel.

Description

technical field [0001] The invention belongs to the technical field of road construction, and in particular relates to a drainage construction technology for tunnels in seasonally frozen soil. Background technique [0002] In recent years, although my country has made a lot of achievements in tunnel construction and made progress in tunnel waterproofing and drainage, there are still many problems in tunnel waterproofing and drainage to varying degrees, which pose a great problem to safe driving. Tunnel waterproof and drainage construction is the key to ensure the smooth completion of the tunnel. It has laid a good foundation for the waterproofing of structures; doing a good job in structural waterproofing and drainage is an important prerequisite for ensuring the normal operation of the tunnel. For this reason, the owner of the expressway attaches great importance to it. Based on this, a waterproof construction technology for tunnels in seasonally frozen soil has been resear...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F16/02E21D11/38
CPCE21D11/38E21F16/02
Inventor 苏春生
Owner CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP OF THE FIFTH ENG