广州市大坦沙钻探施工引发岩溶塌陷成因机理分析
Genetic mechanism analysis of karst collapse caused by drilling construction in Datansha,Guangzhou City
石晓龙 1闫淼 1孙昊 1郑小战1
作者信息
- 1. 广州市地质调查院,广东 广州 510440
- 折叠
摘要
钻探施工是广州市工程建设场地发生岩溶地面塌陷的重要诱因.本文以广州市大坦沙某建设工地的岩溶地面塌陷事件为例,通过分析地下水位变化对钻探施工过程的响应,探讨场地发生岩溶塌陷的成因及形成机理,并提出了相应的防控措施.结果表明:岩溶塌陷主要由复杂地质环境条件和钻探施工造成,形成机制为机械贯穿致塌模式,形成演化过程可分为土洞(或溶洞)稳定阶段、钻探贯穿土洞(或溶洞)顶板阶段和突发地面塌陷阶段.
Abstract
Drilling construction is an important cause of karst ground collapse at engineering and construction sites in Guangzhou.Taking the karst ground collapse event at a construction site in Datansha,Guangzhou as an example,this paper analyzes the response of groundwater level changes to the drilling construction process,explores the causes and formation mechanism of karst collapse at the site,and puts forward corresponding preventive and control measures.The results show that karst collapse is mainly caused by complex geological environment conditions and drilling construction,the formation mechanism is mechanical penetration collapse mode,and the formation evolution process can be divided into the stable stage of soil hole(or cavern),the stage of drilling through the top plate of soil hole(or cavern),and the stage of sudden ground collapse.
关键词
岩溶塌陷/钻探施工/成因分析/形成机理Key words
karst collapse/drilling construction/genetic analysis/formation mechanism引用本文复制引用
出版年
2024
NETL
NSTL
万方数据