Research On The Exploration And Treatment Of Covered Karst Foundation

Covered karst is widely developed in China.How to accurately explore the karst development and how to effectively control the karst disaster,is an important problem in the construction of covered karst development area.Through the research on the exploration and treatment in Tangshan area,the methods of exploration and treatment of covered karst foundation are summarized and improved.Especially in the process of karst treatment,the information construction method is applied.We usually use the method of exploration and drilling in the process of covered karst governance,which includes high density image of shallow earthquake,drilling coring,in-situ text,geotechnical text and borehole televiewer.In order to enhance the degree of survey accuracy,we use the survey methods and analyze them comprehensively.According to the stability of karst development,we partition the ground,formulate corresponding karst treatment and monitor scheme finally.Karst governance adopts slip casting method,and before deciding karst treatment scheme preliminaryly,we should analyze survey data detailedly.We use informaive construction so as to optimize treatment scheme.Moreover,we adjust the partial situation in spot according to several primary factors,such as the depth and distance of grouting hole,the concentration of cement grout,grouting pressure and order,blocking way.Trough the study on survey and treatment of covered karst foundation,this project achieves better treatment effect and save the construction cost.Meanwhile,it builds intact system of foundation survey and treatment in covered karst area.