覆蓋型巖溶地基勘察與治理研究
[Abstract]:The overburden 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 the covered karst development area. Based on the investigation and treatment of karst foundation in a project in Tangshan urban area, this paper sums up and summarizes the methods of karst investigation and treatment in covered karst area, and improves the method of investigation and treatment of karst foundation. In particular, the application of information construction method in the process of karst treatment. In the process of karst foundation exploration, the methods of combining geophysical prospecting and drilling, including shallow seismic high-density mapping, drilling (core taking, in-situ testing, geotechnical test), and television in wells, are used to explore overlying karst. In order to increase the accuracy of the survey data, the comprehensive utilization and comparative analysis of various survey methods are carried out. Finally, the karst development and stability of the site are divided, and the corresponding karst treatment plan or monitoring plan is made for different districts. Grouting method is used for karst treatment. After detailed analysis of the survey results, the preliminary karst treatment scheme is determined, and the information construction method is adopted in the construction to optimize the treatment scheme. The main factors affecting the karst treatment effect, including grouting hole depth, grouting hole spacing, cement slurry concentration, grouting pressure, grouting sequence and plugging method, are adjusted according to the field conditions. Through the investigation and treatment of overburden karst foundation, the project achieves good treatment effect and reduces the total cost of the project. At the same time, the technical system of foundation investigation and treatment in the covered karst area is established.
【學(xué)位授予單位】:華北理工大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TU195
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