Method for achieving blasting excavation of large-section tunnel with area larger than 400 m2 or above based on electronic detonator

An electronic detonator, large-section technology, used in blasting, tunneling, earth-moving drilling, etc., can solve problems such as low efficiency and difficulty in meeting vibration velocity control for large-section tunnels, achieving universal applicability, high overall construction progress, and avoiding operations. Effects of security risks

Active Publication Date: 2020-04-21
CHONGQING ZHONGHUAN CONSTR +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above technical problems, the present invention provides an electronic detonator based on 400m 2 The blasting excavation method for large-section tunnels above solves the problems that traditional blasting methods for large-section tunnels are difficult to meet the requirements of vibration velocity control and construction progress, and low efficiency.

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  • Method for achieving blasting excavation of large-section tunnel with area larger than 400 m2 or above based on electronic detonator
  • Method for achieving blasting excavation of large-section tunnel with area larger than 400 m2 or above based on electronic detonator
  • Method for achieving blasting excavation of large-section tunnel with area larger than 400 m2 or above based on electronic detonator

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Embodiment

[0084] The following is an example of the Shenzhen Liantang Tunnel Project to further illustrate the technical solution of the present invention. Shenzhen Liantang Tunnel Project is a section of Shenzhen Eastern Transit Expressway. The tunnel is located near Xianhu Botanical Garden in Luohu District, and some sections are close to Shenzhen Reservoir. The safety of the Shenzhen Reservoir should be ensured during the construction of large sections.

[0085] Among them, the maximum section of the bifurcation tunnel is 428.5m 2 , the world's largest road tunnel excavated by blasting. The project adopts a control standard higher than the "Blasting Safety Regulations" (GB6722-2014), and the blasting vibration speed is controlled within 2.0cm / s at a distance of 20m from the blast source. If the traditional tunnel blasting and excavation method is used, not only the blasting efficiency with short footage is low and the construction organization is complicated, but also the safety o...

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Abstract

The invention relates to a method for achieving blasting excavation of a large-section tunnel with the area larger than 400 m2 or above based on an electronic detonator and belongs to the field of tunnel blasting construction. The blasting excavation method comprises the five stages of a climbing uplifting section, a transverse expanding excavation section, a reverse excavation construction section, an over-excavation backfill section, a residual rock mass and large-section inverted arch treatment. The climbing uplifting section adopts a common detonator controlled blasting technology, and thetransverse expanding excavation section and the reverse excavation construction section both adopt a digital detonator hole-by-hole blasting technology. According to the method, the requirements forlow vibration speed precise control, high circulating footage and safe construction can be met at the same time in ultra-large section blasting construction.

Description

technical field [0001] The invention relates to the field of tunnel blasting construction, in particular to a method for realizing 400 m based on an electronic detonator 2 The above large-section tunnel blasting and excavation methods are mainly aimed at the blasting and excavation projects of super large-section bifurcation tunnels. Background technique [0002] With the progress of the times and society, the current highway and railway tunnels tend to build multi-lane (more than three lanes) expressways, and the construction of underground stations is developing towards a wider and more comfortable direction. Therefore, large-section tunnels and the accompanying tunnel construction will become normal. Generally speaking, the four-lane section is mostly 200m 2 Left and right, if the cross-section of the parallel line in the tunnel is larger, it is generally considered to be greater than 100m. 2 It belongs to the highest-level extra-large section, and the current 200m in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D3/04E21D9/00
CPCE21D9/006F42D3/04
Inventor 杨仁树赖成军龚敏贾家银吴晓东任康李永强沈仕宇李晓军陈淑明万锐杨国穿虎绍楠
Owner CHONGQING ZHONGHUAN CONSTR
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