Temporary centralized diversion and drainage device for water gushing from lithologic stratum tunnel and use method of device

A technology for tunnels and formations, which is applied in the directions of safety devices, drainage, earthwork drilling and mining, etc. It can solve the problems of difficult drilling drainage, slow construction speed, and high construction cost, so as to ensure construction safety and construction progress, low cost and saving cost effect

Inactive Publication Date: 2018-12-18
CHINA FIRST HIGHWAY ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Advanced drilling for drainage The drilling depth is relatively large and the construction speed is slow. It is suitable for the situation where the groundwater is not abundant, and it is difficult to achieve drainage in the fault zone where the groundwater pressure is too high; the auxiliary tunnel should be kept in line with the main hole of the tunnel. Parallel or close to parallel, and require 10-20m in advance, the drainage effect is more obvious than the advance drilling drainage, but the cost is higher; grouting can cut off the groundwater flow, reduce the leakage of water into the working surface, and create a good job for the construction conditions, but there are also problems such as slow construction speed and high construction cost

Method used

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  • Temporary centralized diversion and drainage device for water gushing from lithologic stratum tunnel and use method of device
  • Temporary centralized diversion and drainage device for water gushing from lithologic stratum tunnel and use method of device
  • Temporary centralized diversion and drainage device for water gushing from lithologic stratum tunnel and use method of device

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Effect test

Embodiment 1

[0034] Such as Figure 1 to Figure 4 As shown, the temporary concentrated drainage device for tunnel water gushing in this embodiment includes a casing structure 1 and a drainage structure 2, the casing structure 1 wraps the drainage structure 2, the outer wall of the drainage structure 2 is close to the inner wall of the casing structure 1, and the other The side communicates with the external space. The temporary concentrated drainage device for tunnel water gushing is simple in structure and can be prefabricated in advance. During on-site construction, it is only necessary to drive the prefabricated drainage device into the place where the water seepage is obvious on the tunnel face to effectively drain water. The groundwater in the rock formation enters into the drainage pipe through the permeable holes of the shell structure and the selective filter layer, and the water is directly discharged from the drainage pipe. Compared with the existing technology, the drainage dev...

Embodiment 2

[0041] The implementation steps of the tunnel water gushing temporary centralized drainage device of this embodiment are as follows:

[0042] (1) Take a hollow metal tube with a tube wall thickness of 8mm, a tube length of 80cm, an outer diameter of 11.6cm, a tapered drill bit diameter of 12cm, and a cone head hollow metal tube with a depth of 8cm. Permeable holes are drilled in the form of conical countersunk holes. The outer diameter of the conical countersunk hole is 10mm, the inner diameter is 5mm, the feeding depth is 3mm, the density of the holes is 15 per ring, and the distance between the rings is 3cm; PVC pipe, using a drilling machine to drill water-permeable round holes with a diameter of 8mm, a hole density of 15 per ring, and a ring spacing of 3cm;

[0043] (2) Take a PVA foam sponge with a width of 3cm and a thickness of 1cm, and wrap the hard PVC pipe in sections at intervals of 5cm; take a thickness of 2mm, and the weight specification is 200g / m 2 Needle-punch...

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Abstract

The invention discloses a temporary centralized diversion and drainage device for water gushing from a lithologic stratum tunnel and a use method of the device. The device comprises an outer shell structure for forming holes in surrounding rock and supporting the wall of the holes. The front end surface of the outer shell is uniformly provided with holes which realizes division of seepage water ofhole walls into an inner drainage space. The device also includes a drainage guide structure for collecting and discharging seepage water, wherein one side of the outer wall of the drainage guide structure fits closely to the inner wall of the outer shell while the other side is communicated with the outer space. The invention solves the problem that temporary drainage is required on the face ofthe rock stratum tunnel during excavation, ensures construction safety, shortens the construction period of the tunnel and reduces the engineering cost.

Description

technical field [0001] The invention relates to the field of tunnel construction, in particular to a temporary centralized drainage device for water gushing in tunnels in lithic formations and a method for using the same. Background technique [0002] Tunnel water gushing is one of the main factors affecting construction safety and construction progress. When the tunnel passes through the karst developed area or the broken zone of the water-rich fault, the groundwater will wash away the rock strata, making it more difficult to excavate the tunnel face, and even water gushes out of the tunnel face, which will cause the construction equipment and even the tunnel to be flooded, seriously affecting the construction safety and Construction Schedule. At present, the commonly used treatment methods for water gushing in tunnel construction in lithological strata are: advance drilling drainage, auxiliary tunnel drainage, and grouting water blocking. Advanced drilling for drainage T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F16/02
CPCE21F16/02
Inventor 姚占虎郝纯宗阳军生郑静李林毅李尊武张城瑞
Owner CHINA FIRST HIGHWAY ENG
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