Explosion method of open-cut tunnel segment

A tunnel and cut-and-cover technology, applied in blasting and other directions, can solve the problems of delayed construction of new tunnels, threats to life and property safety, and increased engineering costs, so as to ensure the safe and smooth implementation of the project, reduce vibration damage, and increase openings. The effect of excavation construction efficiency

Active Publication Date: 2015-03-25
SHANGHAI MUNICIPAL ENG DESIGN INST GRP +2
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Problems solved by technology

This may not only lead to a delay in the construction period of the new tunnel and a substantial increa

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  • Explosion method of open-cut tunnel segment
  • Explosion method of open-cut tunnel segment
  • Explosion method of open-cut tunnel segment

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[0028] The blasting method of the open-cut section of the tunnel proposed by the present invention will be further described in detail below with reference to the drawings and specific embodiments. According to the following description and claims, the advantages and features of the present invention will be clearer. It should be noted that the drawings are in a very simplified form and all use imprecise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0029] Combine below figure 1 with Figure 8 The blasting method of the open cut section of the tunnel according to an embodiment of the present invention will be described in detail.

[0030] The blasting method of the open cut section of a tunnel according to an embodiment of the present invention includes the following steps:

[0031] Step 1: Determine the excavation area and excavation boundary of the open-cut tunnel;

[0032] Such as figure...

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Abstract

The invention provides an explosion method of an open-cut tunnel segment. The explosion method includes dividing rock mass of the open-cut tunnel segment to be tunneled into a plurality of steps from the top down for construction in layers and segments; comprehensively employing the spaced-loading segmental millisecond-delay blasting technique and the guide hollow hole-based contour smooth blasting technique. In this way, vibration damage, caused by oversize vibration, never occurs to near buildings during blasting of the tunnel shallow segment; tunneling efficiency of the rock mass of the open-cut tunnel segment is increased; cost spent on reinforcing and maintenance of the near buildings and temporary slopes is lowered; and engineering is implemented safely and smoothly.

Description

technical field [0001] The invention relates to a blasting method for open-cut sections of tunnels, in particular to a shock-absorbing blasting method for excavation construction of open-cut sections of tunnels close to existing buildings (structures). Background technique [0002] Generally, at the entrance and exit sections of mountain tunnels, due to the shallow buried depth in this area, it is often required to use the open cut method for tunnel construction in terms of construction safety and economic factors. During the blasting excavation process of the open-cut section of the tunnel, the existing buildings (structures) adjacent to the open-cut section are easily damaged or even destroyed due to the huge excavation blasting earthquake, especially when the temporary slope formed by the excavation When its own stability is poor, it is prone to collapse or landslide of slope rock mass, and its adjacent buildings (structures) will be in danger of tilting and collapsing. ...

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Application Information

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IPC IPC(8): F42D3/04F42D1/00
Inventor 葛竞辉费建勇张继春李志刚李河江邹新宽曹诗定王善贵石洪超李军
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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