Mechanism and synergetic treatment technology of water inrush disaster in completely and strongly weathered granite tunnels

被引：0

作者：

Yuan J. ^{[1
]}

Chen W. ^{[1
,2
]}

Huang S. ^{[3
]}

Zhou X. ^{[3
]}

Zhou Z. ^{[1
]}

Liu J. ^{[1
]}

机构：

[1] State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, Hubei

[2] Geotechnical and Structural Engineering Research Center, Shandong University, Jinan, 250061, Shandong

[3] Guangxi Xinda Highway Co., Ltd., Nanning, 530021, Guangxi

来源：

| 1600年 / Academia Sinica卷 / 35期

基金：

中国国家自然科学基金;

关键词：

Completely and strongly weathered granite; Inducing factor; Risk environment factor; Synergetic treatment technology; Tunneling engineering; Water inrush mechanism;

D O I：

10.13722/j.cnki.jrme.2015.1167

中图分类号：

学科分类号：

摘要：

Water inrush disaster in weathered granite regions with abundant water does tremendous harm to the construction of tunnels and surrounding environment. Combining with the treatment practice of water inrush disaster of Shanxin tunnel in Guangxi Zhuang Autonomous Region, the water inrush mechanism, character of disaster and countermeasures were studied by conducting geophysical and drilling exploration at field, laboratory experiments and theoretical analysis. It shows that the water inrush disaster happens suddenly and has strongly destructive influence with high evolution speed. The risk environment factor of water inrush disaster in weathered granite regions are disintegration of surrounding soil, interconnected channels of groundwater, abundant groundwater recharge, and banded valley topography. Meanwhile, unsatisfactory of grouting implementation, insufficient of outburst prevention thickness and disturbance of excavation is the dominant inducing factor to cause water inrush disaster. Under the influence of excavation disturbance and groundwater pressure, the advancing face loses stability because of seepage failure and evolves rapidly to form water inrush disaster, even inducing ground collapse and severe water losses, etc. Considering the safety of tunneling construction and ecological environment, general treatment principle of water inrush disaster is proposed, which emphasizes on giving priority to seal water by grouting combining with the drainage work. Further on, according to the different geological conditions caused by water inrush disaster, corresponding treatment scheme should be adopted with dynamic construction principle. In order to seal water and reinforce the completely weathered granite, the synergetic treatment technology is optimised, with composite curtain grouting and full-face curtain grouting. And the proposed synergetic treatment technology is adopted in the design of treatment of water inrush disaster and applied into practice. © 2016, Science Press. All right reserved.

引用

页码：4164 / 4171

页数：7

共 19 条

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