摘要
对武汉地铁六号线隧道穿越区岩溶地质进行了研究。结合武汉区域岩溶发育特征和分布规律,总结出研究区内岩溶发育的特点;并在此基础上重点研究了沙漏型岩溶地面塌陷机理及计算模型。根据研究区地质资料,对于岩溶发育区段地层提出了加固处治方案,具体为采用基岩岩溶注浆处理,隧道外侧采取旋喷桩+灌注桩帷幕。对旋喷桩+灌注桩帷幕进行了数值模拟。模拟结果表明,这种处治方案结合基岩岩溶注浆能够有效的解决隧道穿越区岩溶塌陷问题。研究对于指导和防止岩溶塌陷有重要理论和实践意义。
karst geology of Wuhan metro line 6 been have researched,and combining with the Wuhan regional karst features and distribution laws,sums up the characteristics of karst development in the area,and on this basis,the hourglass karst ground subsidence mechanism was focu on and calculation model. According to the geological data,strengthening measure was presented for karst formations section. The concrete proposal is to adopt grouting for bedrock karst. Outside of the tunnel take high pressure jet grouting pile and cast-in-place pile as the curtain,and numerical simulation method was used to test the degree of accuracy of high pressure jet grouting pile and castin-place pile. The simulation results show that this treatment program can effectively solve the problem of tunnel crossing area karst collapse. Theoretical and practical significance been has greated for preventing the karst collapse.
出处
《科学技术与工程》
北大核心
2017年第8期282-287,共6页
Science Technology and Engineering
基金
武汉地铁集团有限公司科研项目"地铁隧道穿越区岩溶处理关键技术研究"(GS-JZ-510)资助
关键词
岩溶地质
地面塌陷
加固方案
数值模拟
Karst geology
surface collapse
layoutofreinforcement
numerical simulation
