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Over-excavation and under-excavation control construction method for mechanically and partially excavating tunnel

A technology of subdivided excavation and construction method, applied in tunnels, earthwork drilling, instruments, etc., can solve the problems of increasing excavation costs, affecting construction progress, safety quality, etc., and achieve the effect of improving construction progress and quality

Pending Publication Date: 2022-04-29
CCFEB CIVIL ENG +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The construction control of tunnel over- and under-excavation not only directly affects the construction progress and safety quality, but also increases the excavation cost, and more importantly, it causes the cost of excessive overfilling concrete

Method used

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  • Over-excavation and under-excavation control construction method for mechanically and partially excavating tunnel
  • Over-excavation and under-excavation control construction method for mechanically and partially excavating tunnel
  • Over-excavation and under-excavation control construction method for mechanically and partially excavating tunnel

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Experimental program
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Effect test

Embodiment

[0032] For the construction method of controlling over- and under-excavation of tunnels excavated by mechanical divisions, please refer to Figure 1 to Figure 5 , which includes the following steps:

[0033] Step S1: According to the data of the circumferential overbreak and underbreak, the axis overbreak and the outer contour 6 of the tunnel face in the next part of the tunnel, multiple laser-guided pointing devices 2 are set in the tunnel to measure and Control the position of the laser guidance pointing device 2, so that the laser guidance pointing device 2 can send out laser signals along the tunnel excavation direction, thereby projecting the laser control point 21 and the laser control line 22 on the tunnel excavation section, and making the laser control point 21 Distributed on the outer contour line 6 of the face of the tunnel to be excavated in the next part and make the laser control line 22 reflect the amount of over- and under-excavation in the circumferential dire...

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Abstract

The invention discloses an over-excavation and under-excavation control construction method for mechanically and partially excavating a tunnel, which comprises the following steps of: projecting a laser control point and a laser control line on a tunnel excavation section by arranging a laser guidance pointing instrument, and projecting a tunnel face image on the tunnel excavation section by arranging a tunnel face projection device; wherein the laser control line can be used for conveniently controlling the circumferential back break amount of the tunnel, and the longitudinal back break amount can be accurately and conveniently controlled by using the tunnel face image and the laser control point, so that the construction progress and quality of the back break of the tunnel can be improved.

Description

technical field [0001] The invention relates to a construction method for controlling over- and under-excavation of tunnels excavated by mechanical divisions, and belongs to the technical field of tunnel construction. Background technique [0002] In recent years, with the economic growth and the acceleration of urbanization, my country has built various types of underwater tunnels with a total length of 10,000 kilometers. The methods of building underwater tunnels mainly include shield tunneling method, immersed tube method and mining method. Compared with other construction methods, the mining method has its unique advantages-low construction cost, especially for shorter tunnels, its economic benefits are more obvious. As for mechanically excavated mining tunnels, how to control their over- and under-excavation is an urgent problem to be solved at present. [0003] The construction control of tunnel over- and under-excavation not only directly affects the construction prog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00G01B11/24G01C15/00
CPCE21D9/00E21D9/003E21D9/004G01C15/00G01B11/2433
Inventor 张腾彭可云张红卫赵一博郭弘宇谭搏雷润杰傅鹤林符瑞良
Owner CCFEB CIVIL ENG
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