龙潭隧道F_2断层处涌水突泥机理及治理研究  

Study on Mechanism and Treatment of Gushing Water and Burst Mud at F_2 Fault in Longtan Tunnel

作　　者：刘钦[1] 李术才[2] 李煜航[3] 张立丰 

机构地区：[1]长安大学建筑工程学院,西安710061 [2]山东大学岩土与结构工程研究中心,济南250061 [3]中国地震局第二监测中心,西安710054 [4]中铁十四局集团二公司,山东泰安270000

出　　处：《地下空间与工程学报》2013年第6期1419-1426,共8页Chinese Journal of Underground Space and Engineering

基　　金：中央高校基本科研业务专项资金资助(2013G1281075;2013G3282014)

摘　　要：在岩溶地区深埋长大隧道的施工过程中，当隧道穿越断层、岩溶发育地段和富含水区域时，容易发生涌水、突泥等事故，给施工安全带来极大威胁。龙潭隧道属于深埋特长岩溶隧道，施工期ZK72＋205～ZK71＋940段断层溶蚀带发生了四次涌水突泥事故，针对这四次事故，基于该段地层的岩溶发育规律，从地质学角度系统地分析了涌水突泥机理。分析得到：具有丰富补给来源的地下水、松散的岩溶洞穴堆积物给涌水突泥创造了必要条件，一经开挖扰动，事故一触即发。基于涌水突泥机理的分析结果，合理选择了超前小导管挤压劈裂注浆、负压排水、长管棚注浆、前进式分段高压注浆等治理措施，成功穿越了该段，完成了贯通，所得结论对类似工程具有一定的借鉴意义。During the construction of deep buried extra-long tunnel in karst areas, when tunnel is excavated through the faults, lot karst and saturated zone, geological disasters are prone to occur, such as gushing water and burst mud. Great trouble and serious impact have been brought to the construction. Longtan tunnel is the third longest highway tunnel in China. During the construction, gushing water and burst mud disaster have occurred for 4 times at ZK72 ＋ 205 - ZK71 ＋ 940 mileage. According to the karst development law in this area, gushing water and burst mud mechanism is analysed from view point of geology systematically for the 4 accidents. Some conclusions can be drawn as follows： necessary conditions are created by groundwater with rich supply resource and loose cave deposits. Once being disturbed by excavation, the accident may occur at any moment. According to the results of gushing water and burst mud mechanism, advanced small pipe compressive splitting grouting, suction drainage and long pipe roof grou- ting etc. are adopted reasonably. At last, the tunnel is joined up successfully. The conclusions have referential sig- nificance to similar engineering.

关 键 词：龙潭隧道 隧道工程 断层 涌水突泥 治理 

分 类 号：U456.33[建筑科学—桥梁与隧道工程]