摘要
以宣曲(宣威-曲靖)高速公路海德隧道为研究对象,从浅层岩溶发育大小、充填介质、发育部位等方面对浅层岩溶发育特征进行统计分析,揭示浅层岩溶的发育机理及特点,并探究浅层岩溶发育与隧道埋深及地质条件的关系。研究结果表明:不同的岩溶发育特征对拱顶沉降有较大的影响,而洞周收敛受其影响较小;对于左拱腰出现溶洞的ZK119+475断面,开挖对溶洞内的填充黏土有扰动作用但影响有限;左右侧拱腰的内、外侧钢架内力变化趋势相似。
Taking Haide Tunnel of Xuanwei- Q ujing expressway as the research object,the characteristics of shallow karst development were analyzed in terms of developmental volume, f illing medium and development position of shallow karst.The development mechanism and characteristics of shallow karst were revealed.The relationship between shallow karst development and tunnel depth and geological conditions were explored.The research results show that different karst development characteristics have great inf luence on vault settlement,while have less inf luence on the convergence around the cave.For the ZK119+475 section of karst cave in the left arch waist,excavation disturbs the f illed clay in the cave,but its inf luence is limited.The change trend of steel frame internal force on both sides of arch waist is similar.
作者
黄彬
杨新安
刘卫星
李淮
HUANG Bin;YANG Xinan;LIU Weixing;LI Huai(School of Transportation Engineering,Tongji University,Shanghai 201804;Key Laboratory of Road andTraffic Engineering of the Ministry of Education,Tongji University,Shanghai 201804;The Third Harbor EngineeringCompany of China Communications Construction,Shanghai 200120,China)
出处
《铁道建筑》
北大核心
2019年第8期84-88,共5页
Railway Engineering
基金
国家自然科学基金(51178336)
关键词
公路隧道
岩溶特征
统计分析
浅层岩溶
围岩变形
Highway tunnel
Karst characteristics
Statistical analysis
Shallow karst
Surrounding rock deformation
