The Karst areas in Yunnan are widely distributed,and construction projects are more susceptible to Karst collapse hazards.In order to explore the causes and treatment technologies of Karst collapse,taking the emergency treatment project of Karst collapse in Wenliuji Town,Qiubei County,Yunnan Province as an example,through investigation,survey,and comprehensive surveying,the geological environment conditions,Karst development characteristics,formation mechanisms,etc.of the collapsed areas are analyzed to determine the stability of the strata,and the susceptibility,danger,and prevention and control zones of Karst collapse are divided,Propose targeted prevention and control measures.Wenliuji Town is located within the monkey climbing rock Karst water system on the left bank of the Qingshui River.The strata are mainly composed of Quaternary cohesive soil and underlying limestone,with Karst caves,soil caves,and dissolution fractures developed.The underground Karst caves are roughly divided into three layers,and Karst is mainly developed vertically due to the occurrence of fractures and fault control.Karst collapse is influenced by various factors such as terrain,lithology,geological structure,groundwater movement,and human activities.The evolution process can be divided into six stages.The collapse area is unstable and has a clear expansion trend.High pressure rotary jet grouting piles are used for reinforcement treatment,and the drainage system in the surrounding area is streamlined. Long term ground deformation and groundwater level monitoring measures are established.
关键词
温浏集镇/岩溶塌陷/分布特征/成因机理/防治措施
Key words
Wenliuji town/Karst collapse/distribution characteristics/genetic mechanism/prevention and control measures
维普
万方数据