摘要
云南岩溶区分布较广,建设工程遭受岩溶塌陷危害的较多,为了探索岩溶塌陷成因及治理技术,以云南省丘北县温浏集镇岩溶塌陷应急治理项目为例,通过调查、勘察、综合测绘,分析塌陷区的地质环境条件、岩溶发育特征、形成机理等,判断地层稳定性,进行岩溶塌陷易发性、危险性分区及防治分区,提出针对性的防治措施。温浏集镇区处于清水江左岸猴爬岩岩溶水系统之内,地层主要由第四系黏性土和下覆灰岩组成,溶洞、土洞及溶蚀裂隙发育,地下溶洞大致分为3层,岩溶受裂隙产状和断裂控制以垂向发育为主。岩溶塌陷受地形地貌、地层岩性、地质构造、地下水运动及人类活动等多种因素影响,演化过程分为6个阶段,塌陷区不稳定,扩展趋势明显,采用高压旋喷桩加固处理,外围地段理顺区内排水系统,建立长期地面变形和地下水位监测措施。
The Karst areas in Yunnan are widely distributed, and construction projects are more susceptible to Karst collapse hazards. In order to explore the causes and treatment technologies of Karst collapse, taking the emergency treatment project of Karst collapse in Wenliuji Town, Qiubei County, Yunnan Province as an example, through investigation, survey, and comprehensive surveying, the geological environment conditions, Karst development characteristics, formation mechanisms, etc. of the collapsed areas are analyzed to determine the stability of the strata, and the susceptibility, danger, and prevention and control zones of Karst collapse are divided, Propose targeted prevention and control measures. Wenliuji Town is located within the monkey climbing rock Karst water system on the left bank of the Qingshui River. The strata are mainly composed of Quaternary cohesive soil and underlying limestone, with Karst caves, soil caves, and dissolution fractures developed. The underground Karst caves are roughly divided into three layers, and Karst is mainly developed vertically due to the occurrence of fractures and fault control. Karst collapse is influenced by various factors such as terrain, lithology, geological structure, groundwater movement, and human activities. The evolution process can be divided into six stages. The collapse area is unstable and has a clear expansion trend. High pressure rotary jet grouting piles are used for reinforcement treatment, and the drainage system in the surrounding area is streamlined. Long term ground deformation and groundwater level monitoring measures are established.
作者
蒋学广
JIANG Xue-guang(Yunnan Geological Engineering Second Survey Institute Co.,LTD.,Kunming 650218,China)
出处
《地质灾害与环境保护》
2024年第3期18-25,共8页
Journal of Geological Hazards and Environment Preservation
关键词
温浏集镇
岩溶塌陷
分布特征
成因机理
防治措施
Wenliuji town
Karst collapse
distribution characteristics
genetic mechanism
prevention and control measures
