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A blasting method for open-cut section of tunnel

A tunnel and open-cut technology, applied in the direction of blasting, etc., can solve the problems of delay in the construction period of new tunnels, threats to life and property safety, and increase in project costs, so as to ensure the safe and smooth implementation of the project, reduce vibration damage and increase the cost of construction. The effect of digging construction efficiency

Active Publication Date: 2018-06-15
SHANGHAI MUNICIPAL ENG DESIGN INST GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 increase in project costs, but also threaten the lives and property safety of adjacent buildings (structures)

Method used

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  • A blasting method for open-cut section of tunnel
  • A blasting method for open-cut section of tunnel
  • A blasting method for open-cut section of tunnel

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Embodiment Construction

[0028] The blasting method of the tunnel cut-and-cut section proposed by the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

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

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

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

[0032] like figure 1 A...

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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. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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