摘要
武陵山1号隧道地处武陵山剥蚀、溶蚀构造中低山区，隧址区地质构造复杂，地表岩溶形态复杂多变，水文地质条件极其复杂。文中系统地对武陵山1号隧道隧址区岩溶发育形态及规律进行了分析，得出隧址区溶洞发育可分为四层，第一层发育标高为650～780 m，第二层发育标高为560～630 m，第三层发育标高为480～550 m，第四层发育标高为300～410 m。经综合分析，隧道里程DK 243＋450～DK 243＋580位于垂直渗流带，该带多形成灌入式突涌水，DK 238＋030～DK 243＋450位于水平径流带，该带易形成灾害性突涌水。结合隧址区的地层岩性，地质构造及物探V8等资料，运用降水入渗法及地下水径流模数法对隧道涌水量进行了预测，并对隧道施工工程风险进行了综合评价。
No.1 Tunnel of Wuling Mountain is located in the medium-low corrosion-karst mountain area,where the geo-logical structure and surface karst morphology is complex and the hydrogeological conditions is extremely complicated. The result of analysis of morphology and regularity of karst development in the tunnel site area shows that the develop-ment of karst cave in tunnel site can be divided into four layers,respectively,650~780 m for the the first layer,560~630 m for the second layer,480~550 m for the third layer and 300~410 m for the fourth layer in the development ele-vation.The result after comprehensive analysis shows the tunnel mileage of DK243 ＋450~DK243 ＋580 is located in vertical vadose zone,where it is easy to form the sudden gushing water;while DK238 ＋030~DK243 ＋450 is located in the horizontal runoff zone,where it is easy to form the disastrous gushing water.Combined with lithology,geological structure and geophysical V8 in the tunnel site area,the water inflow in the tunnel is predicted by precipitation infiltra-tion method and groundwater runoff method and the comprehensive risk assessment of the tunnel is conducted.
出处
《高速铁路技术》
2014年第1期88-92,共5页
High Speed Railway Technology
关键词
岩溶
形态及规律
垂直分带性
工程风险评价
karst
morphology and regularity
vertical zoning
engineering risk assessment
