施工技术 2014年6月下 108 CONSTRUCTION TECHNOLOGY 第43卷第12期 D01:10.7672/sjs2014120108 天津某基坑工程事故原因分析及处理措施 闫玲，高凤栋，霍镜，李建显 (天津市津勘岩土工程股份有限公司，天津300191) [摘要]结合天津市某基坑工程事故实例，分析该基坑事故原因，并提出有效的处理措施.分析表明，该基坑内外 未采取防水、排水措施，基坑暴露时间过长，监测缺失，降雨量过大是基坑事故发生的主要原因，施工单位未按图施 工，擅自将H型钢长度缩短至12m是基坑事故发生的直接原因.根据事故发生特点，采取坑内堆砌砂土袋、支护 结构增设加筋水泥土桩错等措施控制基坑支护结构变形，防止基坑坍塌.结果表明，该处理措施有效控制了基坑 变形的进一步发展，取得了良好的处理效果. [关键词]地下工程；基坑；软土地区；事故；处理措施 [中图分类号]TU753 [文献标识码]A [文章编号]1002-8498(2014)12-0108-04 Accident Analysis and Treatment Measures of a Foundation Excavation Engineering in Tianjin Yan Ling Gao Fengdong Huo Jing Li Jianxian Tianjin Jinkan Geotechnical Engineering Co. Ltd.Tianjin 300191 China) Abstract:Combined with a practical excavation engineering accident in Tianjin this paper analyzes the cause of the accident and offers effective method.The analysis shows that there are some reasons such as both inside and outside exeavation did not take water control and drainage measures the excavation exposed for too long time lack of monitoring and excessive rainfall.Moreover the immediate cause of this accident is that construction unit failed blueprints and they shortened the length of the H-beam to 12 meters.According to the characteristics of the accident the authors take measures that let construction unit piled sand bags along the inside of excavation and add reinforced cement-soil pile anchors which could control structural deformation of excavation support to prevent collapse.The results show that the measures effectively control ...
天津某基坑工程事故原因分析及处理措施.pdf
