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Reconstruction method of surrounding rock of vault cavity after large-section tunnel inrush of water and mud

A large-section, mud-outburst technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve problems such as unsatisfactory results, long treatment period, and high investment, so as to reduce the probability of secondary water inrush and mud outburst, and eliminate potential safety hazards , low cost effect

Active Publication Date: 2019-03-05
CHINA RAILWAY 18TH BUREAU GRP CO LTD +1
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Problems solved by technology

[0004] Conventional treatment methods for large water and mud inrush are often unsatisfactory, and the treatment period is long, the efficiency is low, the investment is high, and it is often affected by factors such as the narrowness of the tunnel.

Method used

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  • Reconstruction method of surrounding rock of vault cavity after large-section tunnel inrush of water and mud
  • Reconstruction method of surrounding rock of vault cavity after large-section tunnel inrush of water and mud
  • Reconstruction method of surrounding rock of vault cavity after large-section tunnel inrush of water and mud

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Embodiment Construction

[0030] The technical solution adopted by the present invention to solve its technical problems is:

[0031] 1) Situation analysis of water and mud gushing parts

[0032] After the water and mud gushing disaster occurred in the tunnel arch, after checking the occurrence process of the water and mud gushing and the on-site mud gushing objects, combined with the comprehensive analysis of the geological data provided by the tunnel design, an initial plan for the treatment of the water and mud gushing can be formulated. Generally, the initial treatment plan is to strengthen the affected uncollapsed vault with grouting and clean up and reinforce the mud-outburst dregs to stabilize the affected vault and slag from collapsing. At the same time, observe and analyze the dregs to facilitate the next step Formulate a treatment plan for the dregs. When the muck is cleaned up to a position 15-10 meters away from the water gushing and mud gushing, the treatment should be stopped, and the ne...

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Abstract

The invention discloses a vault cavity surrounding rock reconstruction method used after water and mud burst of a large-section tunnel. The method mainly aims at a large-section tunnel project, tunnel vault collapse, surrounding rock breaking and large surrounding rock gap unstability which are caused by water and mud burst are transformed and controlled through surrounding rock reconstruction, integration of a tunnel vault and surrounding rock is formed, handling of the water and mud burst of the tunnel is accelerated, investment and losses are reduced, and part of safety hidden hazards are eliminated. The urrounding rock reconstruction method improves the handling efficiency of the water and mud burst of the tunnel, stability of the tunnel surrounding rock is ensured, the probability of secondary water and mud burst is reduced, and the technology is safe and reliable. After positioning, detection and analysis of a tunnel vault cavity, surrounding rock reconstruction is reasonably selected, broken and hollow tunnel vault surrounding rock becomes integrated, the situation that underwater water continues to damage and erode the water and mud burst portion is reduced, the supporting function of a large pipe shed is improved, subsidence and convergence deformation of the surrounding rock are reduced, and the construction process is accelerated.

Description

technical field [0001] The invention relates to a technology for rebuilding the surrounding rock of a vault cavity after water gushing and mud gushing in a large-section highway tunnel, and belongs to the technical field of large-section tunnel construction. Background technique [0002] The rapid development of my country's economy has brought about a sharp increase in traffic volume, and the policies of "Western Development" and "One Belt, One Road" have created an increasingly urgent demand for expressways in Southwest China. With the rapid growth of the local economy, more and more highway designs have been changed from "two-way four-lane" to "two-way six-lane", that is, "one-way three-lane". In particular, the construction of the three-lane expressway directly makes the tunnel excavation width reach 17.2m, and the widening section can reach 20.5m. Under the complex geological conditions of the karst landform on the Yunnan-Guizhou Plateau, the increase in tunnel width b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/00E21D11/10
CPCE21D11/003E21D11/105E21D11/107
Inventor 孙国红于洪泳廖晓斌张会英
Owner CHINA RAILWAY 18TH BUREAU GRP CO LTD
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