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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第12卷    第5期    总第68期    2015年10月

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文章编号:1672-7029(2015)05-1164-08
大相岭隧道高压突水机理与预测分析
魏成武1,杨期祥2,覃礼貌2,廖昕2,巫锡勇2

(1.中铁西北科学研究院有限公司,四川成都 610031;2.西南交通大学地质工程系,四川成都 610031)

摘 要: 深埋长大高水压隧道涌突水潜在的危险部位往往位于隧道经过的断层及其影响带内,对断层处高压突水预测已经成为隧道及其它地下工程的一个关键技术难题。通过分析隧址区围岩储水空间、导水通道条件、涌水量、水头分布及水力梯度,对各断层高压突水危险性作出初步评价,在考虑隧道突水主要影响因素的基础上,根据突水机制(或模式)将高压突水划分为直涌型突水模式、冲蚀型突水模式及破裂型突水模式。进而分别讨论各种突水模式在大相岭隧道穿越各断层处的基本条件和突水可能性,对其高压突水危险性作出综合预测。

 

关键字: 高压;涌水量;断层;渗透性;突水预测

Analysis on the mechanism and prediction of water-inrush underhigh-pressure in Daxiangling Tunnel
WEI Chengwu1, YANG Qixiang2, QIN Limao2, LIAO Xin2, WU Xiyong2

1. Northwest Research Institute Limited Company of China Railway Engineering Corporation, Chengdu 610031, China;
2. Department of Geological Engineering, Southwest Jiaotong University, Chengdu 610031,China

Abstract:The potential critical positions of water inrush in the deep, long and high pressure tunnel are mainly located on the fault areas or the influenced zone. So the prediction for the high-pressure water inrush on the fault has become a key technology problem for tunnels and other underground constructions. Based on the analysis of underground storing space, water passage, water discharge, water head distribution and hydraulic gradient, we evaluated the water-inrush risk on each fault area. Considering the main influence factors of water-inrush, it is divided into three models: a) direct inrush model, b) erosion inrush model and c) rupture inrush model. The essential conditions and water-inrush possibility for each model on the fault area were discussed. Moreover, the water-inrush risk was forecasted comprehensively under the high-pressure.

 

Key words: high-pressure; water passage; fault; penetrability; water-inrush prediction

ISSN 1672-7029
CN 43-1423/U

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