汉江特大桥覆盖型岩溶地质特征及处理措施研究  

Research on Geological Characteristics of the Covered Karst and Treatment Measures for Hanjiang Super-major Bridge

作　　者：曾德建[1] 王茂靖[1] 杜宇本[1] ZENG Dejian;WANG Maojing;DU Yuben(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China)

机构地区：[1]中铁二院工程集团有限责任公司,成都610031

出　　处：《高速铁路技术》2020年第5期63-67,共5页High Speed Railway Technology

摘　　要：本文以郑万高速铁路汉江特大桥为研究对象,通过对覆盖型岩溶覆盖层物质成分、结构、岩溶发育规律进行研究,并结合工程实际,对工程范围内岩溶地面塌陷进行评价、预测,提出了在勘察设计过程中应进行规避和减少岩溶对结构工程的影响;针对汉江特大桥下伏岩溶发育特征,制定了岩溶处理措施;总结了防止施工引起的岩溶地面塌陷的方法该措施方法有效可行,可供类似工程借鉴和参考。The Hanjiang Super-Major Bridge on the Zhengzhou-Wanzhou High-Speed Railway is taken as the object of research in this paper.Through the research on the covering layer material composition,structure and karst development law of the covered karst,and in combination with the actual conditions of the Project,the karst ground collapse within the project area is evaluated and predicted.It is pointed out in the paper that the impact of karst on structural engineering shall be avoided and reduced in the survey and design process;karst treatment measures are put forward according to the underlying karst development characteristics of the Hanjiang Super-Major Bridge;methods to prevent karst ground collapse caused by construction are also summarized.These measures and methods are all effective and feasible,and can be used for reference in similar projects.

关 键 词：覆盖型岩溶 岩溶评价 岩溶处理 沙漏型塌陷 

分 类 号：P642.25[天文地球—工程地质学]