【作者】 栾德祥； 刘琦； 顾展飞； 苏高裕； 苏敏；

【Author】 LUAN Dexiang;LIU Qi;GU Zhanfei;SU Gaoyu;SU Min;Department of Geotechnical Engineering in the College of Civil Engineering,Tongji University;Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education(Tongji University);Management Service of Guangzhou-Qingyuan Expressway Reconstruction and Extension Project,Guangdong Freeway Co.,Ltd.;

【机构】 同济大学土木工程学院地下建筑与工程系； 岩土及地下工程教育部重点实验室(同济大学)； 广东省高速公路有限公司广清高速公路扩建工程管理处；

【摘要】 广清高速公路改扩建工程有33km的线路位于岩溶发育区,在该区域施工时曾出现多次岩溶塌陷。岩溶塌陷的形成是由于塌陷体受到的致塌力超过抗塌力,各种致塌力可以形成多种力学效应,因而构成了不同的致塌模式。本文通过对广清高速公路沿线的气候、地形地貌、地质构造、水文地质等条件的分析,探讨了广清高速公路改扩建工程施工期间沿线发生的岩溶塌陷的致灾机制与模式,指出降雨、施工方法和工艺是岩溶塌陷产生的主要外在诱发因素,详细分析了施工过程中岩溶塌陷的主要灾变模式,包括潜蚀致塌模式、振动致塌模式和荷载致塌模式,并提出预防和处理这些塌陷模式的方法,分析结果可为岩溶地区的塌陷预防和处理提供参考。更多还原

【Abstract】 There were 33 km lines in the karst development area of the Guang-Qing Expressway expansion project.There have been many karst collapses during the construction of the area.The formation of karst collapse is due to the stress of rock and soil greater than the resistance to collapse.Different types of collapsing stress may cause diverse mechanical effects,which constitute varieties of collapsing modes.Based on the analysis of climate,topography,geological structure,hydrogeological conditions of the Guang-Qing highway and so on,the formation mechanism and catastrophe mode of karst collapses during construction are discussed.It is pointed out that rainfall and construction technology are the main inducing factors for karst collapse.The main catastrophe modes are analyzed in detail during the construction process,including the submerged model,the vibration mode and the load mode.The methods of preventing and dealing with these collapse modes are proposed.The analysis results can provide a reference for the prevention and treatment of collapse in karst areas.更多还原