摘要
以兰州轨道交通为背景,采用现场监测与数值模拟相结合的方法,对黄土地区轨道交通暗挖隧道施工引起的地表变形特征进行了系统的分析与研究,并探讨了3种不同支护方案下地表的沉降规律。结果表明:地表沉降监测数据与数值模拟的结果基本一致,验证了MIDAS/GTS-NX模拟隧道暗挖施工对地表沉降预测的可靠性;在安全范围内,考虑工程建设的经济性,通过对3种支护方案的对比分析,采取初支后拱肩注浆的支护方案,既节约成本,又满足地表沉降监测控制值的要求。
In the background of Lanzhou rail transit,the ground surface deformation characteristics caused by tunnel construction in the loess area were systematically analyzed and studied by adopting the method of combining on-site monitoring and numerical simulation,and it also discussed the ground surface subsidence law under three different support schemes. The results show that the data of surface subsidence monitoring are consistent with the results of numerical simulation,verifying the reliability of the prediction to the tunnel excavation on ground surface subsidence simulated by MIDAS/GTS-NX. In the safety scope,considering the economy of engineering construction and according to the competence and analysis of three support schemes,taking the scheme of arching grouting at initial can not only save the cost,but also meet the requirements of ground surface subsidence monitoring.
作者
王波
曹小平
刘子阳
WANG Bo;CAO Xiaoping;LIU Ziyang(Key Laboratory of Road ＆ Bridges and Underground Engineering of Gansu Province, Lanzhou Jiaotong University, Lanzhou , Gansu 730070, China;National and Provincial Joint Engineering Laboratory of Road ＆ Bridge Disaster Prevention and Control,Lanzhou Jiaotong University, Lanzhou, Gansu 730070, China)
出处
《施工技术》
CAS
2018年第13期50-53,共4页
Construction Technology
基金
长江学者和创新团队发展计划滚动资助(IRT_15R29)
关键词
轨道交通
隧道
地表沉降
支护
数值模拟
监测
优化
rail transit
tunnels
settlement
supports
simulation
monitoring
optimization
