Tunnel underground river water burst blockage construction method

A technology of underground river gushing and construction method, applied in the field of tunnel engineering, can solve the problems of personal accident, high cost, difficult handling, etc., and achieve the effect of ensuring the construction period, reducing the construction cost and improving the construction quality.

Inactive Publication Date: 2015-11-18
SINOHYDRO BUREAU 14 CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] A large amount of water gushing out suddenly during tunnel construction is seriously harmful, not only causing equipment and personal accidents, but even being forced to stop work and delay the construction period, and it is difficult and expensive to deal with

Method used

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  • Tunnel underground river water burst blockage construction method

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Embodiment Construction

[0017] In the first step, the intersection of the underground river and the diversion tunnel 1 is expanded and excavated to 3.5m×2m, so that the valve can be installed, and the valve will not encroach on the size of the concrete lining of the diversion tunnel after installation. At the same time, inserting ribs 5 are arranged circumferentially on the cave wall above the water surface line of the underground river. The inserting ribs are Φ25mm, and the insertion length is 2m into the rock for 1.7m. , as the anchor point of the diversion steel pipe.

[0018] The second step is to install the diversion steel pipe. The diversion steel pipe 4 is a steel pipe with an inner diameter of 600mm and a wall thickness of 4mm. The length of the diversion steel pipe is 7.5m. Gate valve 2. The bottom of the diversion steel pipe is 30cm away from the water surface line of the underground river, and the diversion steel pipe is transported to the installation working surface in sections, and th...

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Abstract

The invention discloses a tunnel underground river water burst blockage construction method. The early drainage and the later closing are performed on the underground river water burst by using modes of a water retaining wall, mortar filling and a water closing gate sluice valve to realize the maximum control over the underground river water burst. The construction method overcomes the influence of the water burst on the concrete pouring construction to the greatest extent in the concrete construction process of tunnel with a lot of water burst, so that the concrete construction quality is improved, the construction period is guaranteed, and the water burst treatment construction cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of tunnel engineering, and in particular relates to a construction method for blocking water gushing from an underground river in a water-rich area of ​​a tunnel. Background technique [0002] Among all kinds of tunnel projects that have been built in our country, 80% encounter the hazards of groundwater during construction. Water gushing is the most common geological disaster in tunnel construction. Among the water gushing geological disasters, karst water gushing is the most serious. [0003] During the tunnel construction, a large amount of sudden water gushing is seriously harmful, not only causing equipment and personal accidents, but even being forced to stop work, delaying the construction period, and it is difficult and expensive to deal with. In more and more cross-basin water diversion projects, large-section deep-buried ultra-long tunnels pass through various strata. Leakage and water gushing d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B3/16
Inventor 陈晓光王来所浦友繁尹浩谭剑
Owner SINOHYDRO BUREAU 14 CO LTD
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