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Construction method and system for supporting karst water burst section of tunnel

A construction method and karst technology, applied in tunnels, tunnel linings, drainage and other directions, can solve the problems of high risk of water inrush in tunnels, high water pressure on tunnel roofs, and reduced construction safety, so as to ensure construction safety and quality. , reducing groundwater and local water pressure, and ensuring the effect of construction efficiency

Pending Publication Date: 2022-07-05
中铁二十局集团第五工程有限公司
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Problems solved by technology

[0003] However, the water pressure above the tunnel roof is high, and under the interference of tunnel construction, high-pressure water jets or water inrush will be formed, and the risk of tunnel water inrush is extremely high
During the support process, the shotcrete cannot be molded under the action of rapid water erosion, resulting in support failure, thereby reducing construction safety and affecting construction efficiency

Method used

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  • Construction method and system for supporting karst water burst section of tunnel
  • Construction method and system for supporting karst water burst section of tunnel
  • Construction method and system for supporting karst water burst section of tunnel

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Embodiment Construction

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] It should be noted that if there are directional indications (such as up, down, left, right, front, back, etc.) involved in the embodiments of the present invention, the directional indications are only used to explain the relationship between various components in a specific posture If the specific posture changes, the directional indication also changes accordingly.

[0043] In addition, if there are descriptions involving "f...

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Abstract

The invention discloses a construction method and system for supporting a karst water gushing section of a tunnel, and the construction method for supporting the karst water gushing section of the tunnel comprises the following steps: excavating the karst water gushing section of the tunnel, and carrying out the pretreatment of the karst water gushing section of the tunnel; respectively assembling a bottom die structure and an inverted arch structure; a convex guide strip is arranged on the outer surface of the inverted arch structure, and the guide strip is used for guiding and discharging the sudden gushing water into a drainage ditch; hoisting the assembled bottom die structure and inverted arch structure to the tunnel karst water gushing section to obtain an inverted arch template; acquiring a water burst condition according to the position between the guide strip and the interior of the karst water burst section of the tunnel, and dividing water burst grades according to the acquired water burst condition; and supporting pretreatment is conducted between the guide strip and the karst water gushing section of the tunnel according to the water gushing grade. According to the technical scheme, the construction safety can be improved, and the construction efficiency is guaranteed.

Description

technical field [0001] The invention relates to the technical field of construction of tunnel karst water gushing sections, in particular to a construction method and system for supporting the tunnel karst water gushing sections. Background technique [0002] Tunnel karst is also called lava tunnel, that is, underground lava cave, also known as lava river. Under normal circumstances, when a volcanic group erupts, overflows the magma, and flows downstream along the valley to the southeast. The outer layer cools and solidifies into a hard shell, while the inner fiery continues to underflow, the magma flows out, and finally becomes an underground lava cave. Due to the geological action of lava, various fantastic shapes are formed. [0003] However, the water pressure on the roof of the tunnel is high. Under the interference of tunnel construction, high-pressure water jets or water inrush will be formed, and the danger of tunnel water inrush is extremely high. During the suppo...

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Application Information

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IPC IPC(8): E21D11/10E21D11/38E21F16/02
CPCE21D11/10E21D11/38E21F16/02
Inventor 冀卫清张云飞李朝成冷志华张向前耿国强尹京龙李娴
Owner 中铁二十局集团第五工程有限公司
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