浙赣线提速改造工程岩溶塌陷整治原则的探讨

研究目的:探讨高速铁路工程建设中的岩溶地面塌陷整治原则,力求总结出较为经济、合理、稳妥的岩溶整治原则。研究方法:根据浙赣线在提速改造工程施工及运营中发生岩溶塌陷地段的地质、地貌特征背景,分析岩溶塌陷产生原因,综合岩溶勘探资料和施工整治效果,结合其它铁路线岩溶整治经验对岩溶整治原则进行探讨。研究结论:高速铁路岩溶地面塌陷整治范围应扩大至易塌陷区地表黏性土厚度不大于20 m(绝对厚度)的地段,在抽水需求量大、岩溶地面塌陷严重地段,线路宜采用桥梁工程。岩溶整治施工过程必须贯彻"探灌"结合原则,根据实际情况调整整治范围和深度、调整压浆参数和压浆工艺,以达到治理岩溶地面塌陷目的。

Discussion on the Karst Collapse Regulation Principle for Raising Speed Renovation Project of Zhe - Gan Railway Line

Research purposes: The discussion on karst ground collapse in the engineering construction of the high speed railway is carried out to find out a relatively economic,rational and reliable karst collapse regulation principle.Research methods:According to the geologic and landform feature of the section with karst collapse occurred during the construction and operation of the raising speed renovation project of Zhe-Gan railway line,this paper analyzes the occurring cause of karst collapse,integrates the karst prospecting data and construction regulation effect.And combining with karst regulation experience on other railway lines,the discussion on karst regulation principle has been carried out.Research conclusions:The karst ground collapse regulation scope on high speed railway shall be expanded to the section prone to collapse with the thickness of earth surface cohesiveness less than or equal to 20 m(absolute thickness).The line shall adopt the bridgework for the serious karst collapse section with large pumping demand.During karst regulation construction,the combination principle of prospecting and grouting must be carried out,the regulation scope and depth as well as pressure grouting parameter and technology shall be adjusted as per the actual condition to realize the purpose of controlling karst ground collapse.