中国岩溶2018，Vol.37Issue(1)：120-129,10.DOI:10.11932/karst20180108
江夏法泗岩溶塌陷区冲孔桩施工引发岩溶塌陷的成因机理
Mechanism of karst collapse caused by punching pile construction in Jiangxia Fasi karst collapse area
摘要
Abstract
In September 5th,2014,the 8-1# pile foundation construction site of Wu-Jia expressway bridge in Jiangxia Fasi collapsed and had caused large-scale ground collapse,resulting in 19 different collapse pits.Buildings were damaged and the embankment of Jinshui river also collapsed,leading to the construction rig buried and the project forced to stop for 1 year.Based on the monitoring system of Wuhan karst collapse areas,the dynamic monitoring of groundwater in multiple aquifers and monitoring of vibration points at different parts were carried out during impact hollowing in the limestone fracture zone,from which key parameters such as water level,water pressure and influence radius of fractured karst aquifer were monitored during the punching pile construction process in Jiangxia Fasi.The response of the karst aquifer water pressure to the construction process was studied,as well as the mechanisms of construction-induced overburden collapses were researched.The study shows that the Quaternary confined aquifer is deeply influenced by inner construction activities,but the variation of the water level is relatively flat.In the fractured karst acquirers which are very heterogeneous,when the karst channels are not exposed on the surface,the construction has little effect on the karst water.However,if they are exposed,the karst water level may have a sudden in crease which will increase the risk of karst collapse.关键词
冲孔桩施工/渗流冲击/吸蚀作用/能量消散Key words
punching pile construction/seepage impact/suck erosion/energy release分类
天文与地球科学引用本文复制引用
熊志涛,刘鹏瑞,杨涛,邵勇..江夏法泗岩溶塌陷区冲孔桩施工引发岩溶塌陷的成因机理[J].中国岩溶,2018,37(1):120-129,10.基金项目
中国地质调查项目(水[2012]01-034-001) （水[2012]01-034-001）
