Three-hole highway tunnel and middle drift TBM-double main hole drilling and blasting joint construction method

A technology for highway tunnels and construction methods, applied in tunnels, earth-moving drilling, mining equipment, etc., can solve the problems of high pressure on material organization, slow construction progress, and long construction period, so as to reduce the pressure on material organization and reduce the pressure on material organization. , The effect of low investment in personnel and equipment

Pending Publication Date: 2018-04-17
CCCC SHEC DONGMENG ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When the existing two-hole road tunnel is constructed by the intermediate pilot tunnel method, the design area of ​​the intermediate pilot tunnel is often relatively small due to investment cost considerations, which leads to narrow material passages and high material organization pressure in the intermediate pilot tunnel, which delays the construction progress
Moreover, due to the insufficient escape and rescue capabilities of ordinary two-hole tunnels, once an accident occurs, it is very unfavorable for escape and rescue.
[0003] If the three-hole road tunnel is excavated by the traditional drill and blast method, the construction progress will be slow, the construction period will be long, and the work efficiency will be low. When the tunnel is excavated, the construction location will be far away from the entrance, and there will be great safety hazards in the construction.
However, the TBM method has poor adaptability to adverse geological conditions, and is not as flexible as the drill-and-blast method, and its ability to deal with complex geological conditions, especially soft rock environments, is relatively weak

Method used

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  • Three-hole highway tunnel and middle drift TBM-double main hole drilling and blasting joint construction method
  • Three-hole highway tunnel and middle drift TBM-double main hole drilling and blasting joint construction method
  • Three-hole highway tunnel and middle drift TBM-double main hole drilling and blasting joint construction method

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Effect test

Embodiment 1

[0037] Such as figure 1 As shown, a three-hole road tunnel includes two main holes 1, and a middle pilot hole 2 is provided between the two main holes 1, and the middle pilot hole 2 is connected to the two main holes 1 respectively. They are connected through several transverse tunnels 3 for vehicles, and the middle pilot tunnel 2 is a channel that at least satisfies one-way traffic. The main tunnel 1 is excavated by the drill and blast method, and the intermediate pilot tunnel 2 is excavated by the TBM method. Both the main tunnel 1 and the intermediate pilot tunnel 2 are equipped with support, lining and drainage systems.

[0038] The middle pilot tunnel 2 is arranged along the longitudinal direction of the main tunnel 1, and the cross-sectional size of the middle pilot tunnel 2 is smaller than the cross-sectional size of the main tunnel 1. Through the set middle pilot tunnel 2 and the vehicle transverse tunnel 3, on the one hand, in the tunnel construction process Among th...

Embodiment 2

[0040] Such as Figure 1-Figure 3 Shown, a kind of middle pilot hole TBM-drilling and blasting joint construction method of double main hole, uses described a kind of three-hole highway tunnel, comprises the following steps:

[0041] Step 1: During TBM production, assembly, and commissioning, the opening sections of the main tunnel 1 and the intermediate pilot tunnel 2 are constructed using the drill and blast method, in which the intermediate pilot tunnel 2 goes first, and the two main tunnel 1 and the intermediate pilot tunnel 2 The working faces are misplaced, and the staggered distance between the two working faces is greater than twice the excavation width of the main hole 1 .

[0042]Step 2: After the TBM is assembled and debugged, the drilling and blasting construction of the intermediate pilot tunnel 2 is stopped, and the TBM advances to the working face of the intermediate pilot tunnel 2 to start TBM excavation, and the two main tunnels 1 continue to carry out the dri...

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Abstract

The invention discloses a three-hole highway tunnel. The three-hole highway tunnel comprises two main holes, and a middle drift is formed between the two main holes, is communicated with the two mainholes through several vehicle running transverse holes separately and is a channel at least satisfying one-way vehicle running. The invention further discloses a middle drift TBM-double main hole drilling and blasting joint construction method. The method comprises the steps of adopting a drilling and blasting method for construction on hole opening sections of the main holes and the middle driftin the period of TBM production, assembly and debugging; making a TBM walk to a working surface of the middle drift to start TBM tunneling and making the two main holes continue drilling and blastingconstruction; constructing preliminary supporting of the middle drift; constructing an inverted arch of the middle drift; adopting the drilling and blasting method to dig the vehicle running transverse holes and entering the main holes to dig main hole auxiliary working surfaces; digging the initial working surfaces of the main holes and the main hole auxiliary working surfaces in the same direction; utilizing a TBM method to complete digging of the middle drift and utilizing the drilling and blasting method to complete digging of the main holes.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a combined drilling and blasting construction method of a three-hole road tunnel and a pilot hole TBM-double main hole. Background technique [0002] When the existing two-hole highway tunnel is constructed by the intermediate pilot tunnel method, the design area of ​​the intermediate pilot tunnel is often relatively small due to investment cost considerations. And because the escape and rescue capabilities of ordinary two-hole tunnels are insufficient, once an accident occurs, it is very unfavorable for escape and rescue. [0003] If the three-hole road tunnel is excavated by the traditional drill and blast method, the construction progress will be slow, the construction period will be long, and the work efficiency will be low. When the tunnel is excavated, the construction location will be far away from the entrance, and there will be great safety hazards in the con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/14E21D9/00E21D9/10
CPCE21D9/006E21D9/10E21D9/14
Inventor 李广科毛锦波李亚隆赵红刚
Owner CCCC SHEC DONGMENG ENG CO LTD
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