摘要
调查收集近年来广东省清城区3处岩溶地面塌陷灾害情况,以元仔角村地面塌陷与屋子村地面塌陷作为典型实例,对岩溶地面塌陷的形成条件、类型、形成机理及特征进行分析,在此基础上总结清城区岩溶地面塌陷发育现状及成因,提出防治措施。研究结果认为:清城区近年发生的3处塌陷坑平面形态均为似圆形,剖面形态均为圆柱状。T1、T2塌陷坑直径小于10 m,为小型塌陷,T3塌陷坑直径小于50 m,为中型塌陷,按成因类型分类均属自然塌陷,主要成因为地层岩性,从属因素是气象水文、地形地貌、地表水条件和地下水活动。针对研究岩溶地面塌陷发育问题,提出防治建议为:建立、健全岩溶地面塌陷监测预警系统;完善地下水资源管理措施;加强项目施工管理,做好岩溶塌陷地质调查和探测评价工作;加强与地面塌陷相关法律法规、技术标准体系建设。研究结论对清城区岩溶地面塌陷灾害预警及防治提供科学依据。
Investigate and collect the situation of three karst ground collapse disasters in Qingcheng District, Guangdong Province in recent years. Take the ground collapse in Yuanzaijiao Village and the ground collapse in Wuzi Village as typical examples, analyze the formation conditions, types, formation mechanisms and characteristics of karst ground collapse. On this basis, the development status and causes of karst ground collapse in Qingcheng District are summarized, and prevention measures are proposed. The results show that the plane shape of the three collapse pits occurred in recent years in Qingcheng District is almost circular, and the profile shape is cylindrical.The collapse pits T1 and T2 have a diameter of less than 10 m, which is a small collapse. The collapse pit T3 has a diameter of less than 50 m, which is a medium collapse. They are classified as natural collapse according to the cause of formation type, mainly due to the formation lithology, and the subordinate factors are meteorology, hydrology, topography, surface water conditions and groundwater activities.In order to study the development of karst ground collapse, the prevention and control suggestions are put forward as follows: establish and improve the monitoring and early warning system of karst ground collapse, improve the management measures of groundwater resources, strengthen project construction management, and do a good job in karst collapse geological survey and exploration evaluation, strengthen the construction of laws, regulations and technical standard system related to ground collapse.The research conclusion provides scientific basis for the early warning and prevention of karst ground collapse disaster in Qingcheng District.
作者
李明
周振钊
吴丽霞
LI Ming;ZHOU Zhen-zhao;WU Li-xia(Guangdong Provincial Hydrogeological Brigade,Guangzhou,Guangdong 510080,China)
出处
《地下水》
2022年第6期170-173,共4页
Ground water
基金
清远市财政项目:“清远市清城区多要素城市地质调查”(41802-202001-405001-0001)。
关键词
岩溶地面塌陷
现状
成因
清城区
Karst ground collapse
Present situation
Genesis
Qingcheng District
