贵港覃塘区岩溶地面塌陷的成因与防治对策

近30年来,贵港覃塘区不断发生岩溶地面塌陷。通过野外调查和地下水动态监测等手段,综合分析地面塌陷的主要影响因素和发育规律。结果表明,塌陷是多种因素共同作用的结果,其中采用明渠灌溉且无防渗措施和短时间内大量抽排岩溶地下水是地面塌陷的直接诱因。还对塌陷的形成过程和作用机制进行了分析;在此基础上,针对研究区地面塌陷的实际情况,提出了相应的防治对策。

Genesis and Prevention of Karst Collapses of Qintang District in Guigang

In recent thirty years, there has been serious karst collapses in Qintang District of Guigang. This paper comprehensively analyzed the main influencing factors and development law of karst collapse by field investigation, groundwater dynamic monitoring and other relevant means. Studies showed that karst collapse depended on integrative consideration of various factors. Of which using open channel irrigation with no seepage control measures and largely excessive pumping of karst groundwater in a short time during agricultural irrigation season was the direct cause of the collapse occurrence. This paper also discussed the development process and forming mechanism of karst collapses. On this basis, in accordance with the reality of karst collapses in the research areas, this paper put forward some counter measures about preventing karst collapse in order to reduce the occurrence of karst collapses.