【摘要】 浙江省衢南高速江山四都镇段隐伏岩溶发育,2010年曾发生过路基塌陷,为了保障高速公路安全运营,需要对重点路段进行隐伏岩溶发育情况的详细调查,进而在此基础上分析塌陷机理并设计相应的监测方案,以降低塌陷危险性。本文基于详细的野外地质调查以及大量的勘探工程,概述了研究区内的地质环境条件,分析了隐伏岩溶的空间发育与分布特征以及塌陷的影响因素,并以研究区内某塌陷案例为基础,分析了塌陷的演变过程和成因机理。结果表明:研究区的塌陷以潜蚀成因的土洞塌陷为主,地下水流场的变化是诱发塌陷最主要的影响因素。在此基础上,提出了重点路段的监测方案与建议,可为浙西北隐伏岩溶区高速公路路基塌陷的调查及防治工作提供参考。更多还原

【Abstract】 There exists the development of hidden karst in the section of Sidu Town of Jiangshan City, which is part of Quzhou-Nanping expressway in Zhejiang Province.In 2010,a roadbed collapse occurred in this section.To ensure the safety of this expressway,a detailed investigation of the development of hidden karst in this section shall be conducted so as to analyze the collapse mechanism and design appropriate monitoring programs to control the risk of collapse.Based on detailed geological survey and large amount of exploration projects,this paper elaborates on the geological environmental conditions in the research area, analyzes the space development of the karst and its distribution characteristics as well as the influencing factors of subsidence.On the basis of a collapse case study,the paper analyzes the evolution and formation mechanism of the subsidence collapse mode.The results indicate that the major collapse in the study area is soil cave collapse caused by internal erosion and the change of the groundwater flow field is the main influencing factor of subsidence.The paper puts forward suggestions on the monitoring scheme of key sections, which will be the basis for the investigation,prevention and control work of expressway roadbed subsidence in the hidden karst area in northwest Zhejiang.更多还原