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An electronic detonator based on 400m 2 The blasting excavation method of the above-mentioned large-section tunnel

An electronic detonator, large-section technology, used in tunnels, blasting, 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 ensuring open The effect of excavation support safety

Active Publication Date: 2020-12-29
CHONGQING ZHONGHUAN CONSTR +1
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  • Abstract
  • Description
  • Claims
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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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  • An electronic detonator based on 400m <sup>2</sup> The blasting excavation method of the above-mentioned large-section tunnel
  • An electronic detonator based on 400m <sup>2</sup> The blasting excavation method of the above-mentioned large-section tunnel
  • An electronic detonator based on 400m <sup>2</sup> The blasting excavation method of the above-mentioned large-section tunnel

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Embodiment

[0084] Below Shenzhen Liantang Tunnel Project is an example to further state the technical scheme of the present invention. Shenzhen Liantang Tunnel Project is a section of Shenzhen Eastern Transit Expressway. The tunnel is located near the Fairy Lake Botanical Garden in Luohu District, and some sections are close to the Shenzhen Reservoir. The safety of the Shenzhen Reservoir must be ensured during the construction of the large-section section.

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

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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 based on an electronic detonator to realize 400m 2 The blasting excavation method of the above-mentioned large-section tunnel is mainly aimed at the blasting excavation project of the super-large-section bifurcation part tunnel. 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 in the direction of widening and comfort. Therefore, large-section tunnels and the accompanying tunnel construction will become normal. Generally speaking, the four-lane section is mostly within 200m 2 Left and right, if the parallel section in the tunnel is larger, it is generally considered to be greater than 100m on the perimeter 2 It belongs to the highest level super-large section, and the current...

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Application Information

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Patent Type & Authority Patents(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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