Construction method of urban stone tunnel cantilever tunneling

A cantilever roadheader and tunnel technology, which is applied to tunnels, tunnel linings, shaft linings, etc., can solve the problems of complex ground pipelines, increased initial injection protection amount, and prolonged sealing period, so as to achieve less risk of collapse and construction. The effect of high efficiency and improved safety

Inactive Publication Date: 2018-02-23
JINAN URBAN CONSTR GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The blasting construction itself is more dangerous, and it disturbs the surrounding rock and soil, which is easy to cause the surrounding soil to collapse.
During the blasting construction, the over-excavation of the rock strata on the face of the face is serious, and the amount of soil and stone transported out and the amount of primary support spraying is increased, resulting in a waste of manpower, materials, and machinery. In addition, the time of spraying and protection is prolonged, and the risk of sealing cycle is increased.
Especially the construction site is located in the urban area, the ground pipeline is complicated, and the houses on both sides are close, so the risk of blasting construction is greater

Method used

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Embodiment Construction

[0018] Specific embodiments of the present invention are provided below, and it should be noted that the present invention is not limited to the following specific embodiments, and all equivalent transformations done on the basis of the technical solutions of the present application all fall within the scope of protection of the present invention.

[0019] A cantilever excavation construction method for urban stone tunnels, comprising the following steps:

[0020] (1) Measuring and setting out

[0021] The contour line is released, and the laser is used for positioning;

[0022] (2) Hole face splitting

[0023] The splitting is carried out in cooperation with a splitting machine and a rock drill, with auxiliary drilling and splitting as an auxiliary method to destroy the rock texture and release the rock stress before digging; the drill hole diameter is 5.5cm, and the hole spacing is 0.5m, arranged in a plum blossom shape ;

[0024] (3) Excavation construction of upper step...

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Abstract

The invention belongs to the technical field of underground excavation of a tunnel, and particularly relates to a construction method of urban stone tunnel cantilever tunneling. A rock layer is splitwhen it is hard, and exactly positioned by an excavation line; through the swaying in all rounds of a cutting mechanism at the front end of a tunneling machine and rotary rock breaking of a cutting head, the overexcavation is effectively controlled, and time for sealing an initial liner is reduced; moreover, the safety of a work face is greatly improved, and influence of vibration on surrounding buildings is weakened.

Description

technical field [0001] The invention belongs to the technical field of tunnel excavation construction, and in particular relates to a cantilever excavation construction method for urban stone tunnels. Background technique [0002] At present, tunnels in traditional rock strata are generally constructed by blasting. The blasting construction itself is relatively dangerous, and it disturbs the surrounding rock strata and soil, which is likely to cause the surrounding soil to collapse. During the blasting construction, over-excavation of the rock strata on the face of the tunnel is serious, and the amount of soil and stone transported out and initial support spraying is increased, resulting in a waste of manpower, materials, and machinery. In addition, the time of spraying and protection is prolonged, and the risk of sealing cycle is increased. In particular, the construction site is located in the urban area, the ground pipelines are complicated, and the houses on both sides ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D9/10E21D11/10E21D11/14E21D11/15E21D11/18
CPCE21D9/00E21D9/003E21D9/10E21D11/10E21D11/105E21D11/14E21D11/152E21D11/18
Inventor 韩磊金宝张传美杨守成马旭
Owner JINAN URBAN CONSTR GRP
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