摘要
通过资料收集和对岩溶地质调查成果进行系统梳理,揭示了桂林市规划中心城区的岩溶塌陷分布规律,并对其成因进行了分析,研究表明:研究区湿润多雨、地质构造错综复杂、质纯层厚的灰岩地层、人类工程经济活动都是岩溶地面塌陷的孕灾前提。区内岩溶地面塌陷多发生在地下水位波动变化大的5~8月;地貌上主要发生在溶蚀堆积孤峰平原地貌区和地势低洼、地下水位浅或集中径流地段;地层上主要分布于下伏质纯层厚的上泥盆统融县组(D3r)灰岩之上;同时,也多分布在人类活动密集区,如桂林市主城区和临桂主城区。研究结果为桂林市规划中心城区的规划布局和城市建设提供了基础地质依据。
Through the data collection and karst geological survey,the distribution law of karst collapse in the central planning area of Guilin City is revealed and its causes are analyzed as follows.The research has shown that wet and rainy area,the intricate geological structure,the thick limestone stratum and the human engineering activities are the prerequisites for the karst ground collapse.The karst ground collapse in the area mostly occurs in May-August when the groundwater level fluctuates greatly.Geomorphologically it mainly occurs in the karst plain geomorphic area and low-lying,shallow ground water level or concentrated runoff areas.The strata is mainly distributed on the Upper Devonian Rongxian Formation limestone with underlying pure layer thickness.At the same time,it is also mostly distributed in areas with intensive human activities,such as the main urban area of Guilin and the main urban area of neighboring Lingui.The research results provide the basic geological basis for the planning layout and the urban construction of the city.
作者
江思义
吴福
刘庆超
黄希明
李海良
JIANG Siyi;WU Fu;LIU Qingchao;HUANG Ximing;LI Hailiang(The Guangxi Zhuang Autonomous Region Geological Environment Monitoring Station,Nanning,Guangxi 530029,China)
出处
《中国地质灾害与防治学报》
CSCD
2020年第3期65-72,共8页
The Chinese Journal of Geological Hazard and Control
基金
中国地质调查局地质调查项目(12120114022101)
广西壮族自治区国土资源厅、桂林市人民政府地质调查项目(桂国土资办[2014]70号)。
关键词
桂林市
中心城区
岩溶塌陷
分布规律
成因分析
Guilin City
planning center
karst collapse
distribution law
cause analysis
