恩施市高中山区某滑雪场岩溶地面塌陷特征及成因

Characteristics and Causes of Karst Ground Collapses in a Ski Resort Located in High-Middle Mountainous Area in Enshi City

恩施市某拟建滑雪场场地位于高中山岩溶地区,发育多处岩溶地面塌陷,给场地建设和安全运营带来潜在危害。通过地面调查、电法物探、钻探等手段,查明场地岩溶地面塌陷发育特征,分析塌陷成因并进行稳定性评价。研究表明,场地集中分布4处岩溶地面塌陷坑,发育22个塌陷口,均为小型规模的土体塌陷;解译出27个隐伏溶洞,溶洞主要呈走向45°和30°分布;地下水潜蚀和冲蚀作用是岩溶地面塌陷形成的主要原因。场地岩溶地面塌陷现状稳定性较差,其防治工作应以回填为主,并完善排水系统。研究成果对高中山区岩溶地面塌陷研究和防治有借鉴意义。

A proposed ski resort site in Enshi City is located in the high-middle mountainous karst area,and there are many karst ground collapses,which bring potential harm to the site construction and safe operation.Through ground investigation,electrical geophysical prospecting,drilling and other means,the development characteristics of the karst ground collapses are identified,the causes of the collapses are analyzed,and the stability evaluation is carried out.The research shows that there are 4 karst ground collapse pits concentrated in the site,and 22 collapse openings developed,all of them are small-scale soil collapses;27 hidden karst caves are deciphered,and the karst caves are mainly distributed in strikes of 45°and 30°;underground water erosion is the main reason for the formation of karst ground collapses.The current stability of the karst ground collapses is relatively poor,and it is recommended to focus on backfilling and improve the drainage system for prevention and control.The research results have reference significance for the research and prevention of karst ground subsidence in high school mountainous areas.