深埋隧道溶洞岩体防突层安全厚度研究  

STUDY ON THE MINIMUM SAFE THICKNESS OF WATER-PROOF ROCK MASS IN KARST CAVE OF DEEP BURIED TUNNEL

作　　者：安艳军 乔栋磊 万创业 赵旭 陈诺 李文杰 AN Yanjun;QIAO Donglei;WAN Chuangye;ZHAO Xu;Chen Nuo;LI Wenjie(China Railway 15th Construction Bureau Fifth Engineering Group Corporation,Tianjin 300133,China;Civil Engineering School,Henan University of Science and Technology,Henan Luoyang 471000,China)

机构地区：[1]中铁十五局集团第五工程有限公司,天津300133 [2]河南科技大学土木工程学院,河南洛阳471000

出　　处：《低温建筑技术》2024年第2期115-118,128,共5页Low Temperature Architecture Technology

基　　金：国家自然科学基金资助项目(U1604135);中铁十五局集团有限公司A类科研课题(2019A01);河南省科技厅产学研合作项目(2015HNCXY011)。

摘　　要：为防治深埋岩溶隧道开挖诱发的围岩突水灾害,文中依托巫镇高速笔架山隧道,在考虑溶洞水压条件下研究了充水溶洞位于隧道不同方位、不同距离以及不同埋深时隧道围岩塑性区变化规律。研究结果表明,溶洞位于隧道底部时洞内水压对岩体支护作用最为显著,但该位置的防突层安全厚度受隧道埋深影响最大;溶洞位于隧道顶部时防突层安全厚度对隧道安全影响最大;防突层安全厚度随着隧道埋深的增大而增加;计算所得最小安全厚度为3.9~13.1m,在任意位置情况下,防突层安全厚度均随隧道埋深增大而增加,该预测模型可为隧道突水灾害防治提供参考。The excavation of deep-buried karst tunnels often induces the surrounding rock water inrush disaster.Considering the water pressure of the karst cave,the variation law of plastic zone of surrounding rock is studied when the water filled karst cave is located in different directions,different distances,and different buried depths of the tunnel.The results show that when the karst cave is located under the tunnel,the water pressure in the cave has the most significant effect on the rock mass support;when the karst cave is located at the top of the tunnel,the safety thickness of the anti-outburst layer has the greatest influence on the tunnel safety,in which safety thickness of anti-outburst layer increases with the increase of tunnel depth,and the calculated minimum safe thickness is 3.9~13.1m.At any location,the safety thickness T of the anti-outburst layer increases with the increase of the tunnel buried depth.The prediction model may provide the reference for the prevention and control of tunnel water inrush disaster.

关 键 词：深埋公路隧道 溶洞突水 防突层安全厚度 

分 类 号：TU451[建筑科学—岩土工程]