摘要
基于对野外调查和收集资料的整理统计,运用对比分析方法,研究了60余年来发生在柳州市860 km^2范围内79处岩溶塌陷的成因类型与时空分布特征。结果显示:岩溶塌陷以人为塌陷为主,其中60.0%的人为塌陷由抽汲地下水诱发;时间上,岩溶塌陷数量总体上呈逐年代上升趋势,多发生于春夏两季;空间上,岩溶塌陷的发生受多种地质因素综合控制,集中发生于地下岩溶发育程度高且第四系覆盖层厚度小于10m的一元结构黏性土区域、断层汇交部位及断层两侧,部分塌陷沿断层呈带状分布,总体分布特征呈明显的不均匀性。柳州市岩溶塌陷的成因与时空分布特征主要受区内地质条件、降雨和人类工程活动等多因素综合控制。所做工作揭示了柳州市岩溶塌陷的成因类型和时空分布特征,为城市岩溶塌陷方面的防灾减灾提供了科学依据。
Based on the statistics and summary of field investigation and data collection,a comparative analysis method is used to study the genetic types and temporal and spatial distribution characteristics of 79 karst collapses in the 860 km^2 range of Liuzhou City in the past 60 years.The results show that the karst collapse is dominated by man-made collapse,of which 60.0%are induced by pumping groundwater.In time,the quantity of karst collapses are generally increasing with the chronological trend,mostly occurring in spring and summer seasons.In space,the occurrence of karst collapse is controlled by a variety of geological factors.Most of karst collapses are concentrated in the unary structural clay soil area with a high degree of underground karst development,and with the quaternary overburden thickness of less than 10 m,in the convergence and both sides of the fault.Some of karst collapses are distributed as banded shape along the fault,the overall distribution characteristics of karst collapses show obviously inhomogeneous.The genesis and spatial and temporal distribution characteristics of karst collapses in Liuzhou City are mainly controlled by multiple factors such as geological conditions,rainfall and human engineering activities.The work has revealed the genetic type and spatial and temporal distribution characteristics of karst collapse in Liuzhou,and a scientific basis is provided for disaster prevention and mitigation of urban karst collapse.
作者
文海涛
吴福
卢志文
廖丽萍
WEN Haitao;WU Fu;LU Zhiwen;LIAO Liping(Guangxi Zhuang Autonomous Region Geological Environment Monitoring Station,Nanning 530029,Guangxi,China;College of Civil Engineering and Architecture,Guangxi University,Nanning 530004,Guangxi,China)
出处
《矿产与地质》
2019年第4期753-758,共6页
Mineral Resources and Geology
基金
广西壮族自治区国土资源厅和柳州市人民政府地质调查项目“柳州市城市土地地下空间开发利用调查项目”（桂国土资办〔2014〕69号）资助
关键词
岩溶塌陷
成因类型
时间分布
空间分布
柳州
广西
karst collapse
genetic type
time distribution
space distribution
Liuzhou
Guangxi
