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Water draining method for tunnel construction process of penetrating through water-rich fracture zone

A technology for tunnel construction and broken zones, which is applied in drainage, earthwork drilling, safety devices, etc., can solve the problems of increasing engineering difficulty and high engineering cost, and achieve the effects of reducing construction risk, reducing engineering cost, and shortening the construction period

Active Publication Date: 2015-07-22
CCCC SECOND HARBOR ENG
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Problems solved by technology

This method can well pump out the water in the excavated rock wall, but the project cost is relatively high, and a large number of drainage equipment needs to be added, which increases the difficulty of the project

Method used

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  • Water draining method for tunnel construction process of penetrating through water-rich fracture zone
  • Water draining method for tunnel construction process of penetrating through water-rich fracture zone
  • Water draining method for tunnel construction process of penetrating through water-rich fracture zone

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] Such as Figure 1~5 , the water-rich fracture zone 1 is a geological structural zone with broken rocks and contains groundwater, and the construction of tunnels in the water-rich fracture zone 1 area needs to consider the drainage problem. Such as figure 1 The construction of a small clear distance tunnel in the water-rich broken zone 1 is shown, wherein the small clear distance tunnel includes the first tunnel 2 that passes through the water-rich broken zone 1 and the second tunnel 3 that does not pass through the water-rich broken zone 1. In actual operation, Because the first tunnel 2 will have a large amount of gushing water during the excavation process, it is necessary to quickly discharge the gushing water in time to excavate the tunnel. The method adopted in the present invention is to turn the second tunnel 3 into a ...

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Abstract

The invention relates to the field of tunnel excavating, in particular to a water draining method for the tunnel construction process of penetrating through a water-rich fracture zone. A water guiding structure is arranged on an interval rock wall of a small-distance tunnel to drain water burst on a tunnel face of the water burst tunnel to the other tunnel, and the water discharging flow of the water burst tunnel is increased. According to the water draining method for the tunnel construction process of penetrating through the water-rich fracture zone, based on the surrounding rock seepage field theory, the safety distance of the left tunnel and the right tunnel is kept when the small-distance tunnel is excavated, a non-water-burst tunnel is adopted as a diversion tunnel to replace the water draining mode of arranging an independent diversion tunnel, the problem that the independent diversion tunnel needs to be arranged in tunnel construction in the situation that the water burst amount of the ridge tunnel is too large is solved, the construction period of the tunnel is shortened, the project cost is reduced, and the construction risk is lowered.

Description

technical field [0001] The invention relates to the field of tunnel excavation, in particular to a drainage method during the construction of a tunnel passing through a water-rich fractured zone. Background technique [0002] Excavating tunnels at the low end of the water-rich fracture zone often requires the use of drainage equipment due to the large amount of water inflow, and sometimes the drainage is not returned in time, which seriously affects the excavation period. Commonly used small clear distance tunnels (small clear distance tunnels refer to the special tunnel layout in which the thickness of the middle rock wall between tunnels is less than the minimum clear distance of separate independent double tunnels) use drainage measures to dig underground ditches or drainage ditches in the tunnels , to guide the gushing water on the palm surface into the underground ditch or the drainage channel, and discharge the gushing water through the drainage equipment. In the actua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F16/02
CPCE21F16/02
Inventor 肖伯强胡义新周益军杨钊徐昌茂冯淑华陈成石万波王友
Owner CCCC SECOND HARBOR ENG
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