摘要
武汉市岩溶地面塌陷发生在具二元结构的北东向长江一级阶地与近东西向褶皱构造向斜核部碳酸岩盐地层相交的部位。大气降水垂向渗入补给孔隙含水层和抽汲岩溶水，是形成上下含水层水位差的主要动力因素。孔隙含水层水位与岩溶含水层水位之间的水位差，导致地下水产生垂直向下运动，引起潜蚀掏空形成土洞，而发生地面塌陷，根据土的物理力学性质和地下水动力特征等，建立的岩溶地面塌陷数学模型，对可能塌陷区进行了稳定性计算和预测研究。
The karst surface collapse in Wuhan happened at the intersection between the NE first terrace binary-structured deposits of Yangtze River and carbonate in the core of E-W syncline. Atmospheric precipitation penetrating to recharge pore aquifer and extractingkarst ground warter are principal dynamic factor of forming the difference between the twowater levels in the aquifers. The difference between the water level of pore aquifer and thelevel of karst aquifer leads groundwater to flow downward vertically and form goundwatercorrosion and soil cavities , and surface collapse in the end. According to physical mechanical properties of soil and dynamic characteristics of goundwater, a mathematical model wasset up. We calculated stability of the possible surface collapse district and made a forecast.
出处
《中国地质灾害与防治学报》
CSCD
1994年第S1期103-108,共6页
The Chinese Journal of Geological Hazard and Control
关键词
岩溶地面塌陷
渗入补给
抽汲
水位差
潜蚀
karst surface collapse, penetrating recharge, extracting, difference between the water levels, goundwater corrosion
