施工技术 2016年1月上 20 CONSTRUCTION TECHNOLOGY 第45卷第1期 D0I:10.7672/sgjs2016010020 软土基坑桩锚支护失效案例及处理措施分析* 葛阳成1，朱进军2，邵勇2 (1.连云港市建设施工图审查中心，江苏连云港222006；2.连云港职业技术学院建筑工程学院， 江苏连云港222006) [摘要]某软土基坑采用桩铺支护结构，在基坑开挖完毕后坑体变形突然增至数十厘米，随后经过坑底处砂袋堆载 和钢管支撑使得工程顺利完成.通过现场监测数据分析，认为其原因一是施工速度过快，使得变形无法收敛，二是 软土中桩锚支护结构容易发生转动，特别是在错索错固角度较大和桩体嵌固深度较浅时，因此在软土基坑中采用 桩锚支护结构应加强设计，如减小锚固角度、增大桩长等. [关键词]基坑；软土；支护；失稳；处理措施 [中图分类号]TU753 [文献标识码]A [文章编号]1002-8498(2016)01-0020-04 Failure Case Study and Treatment Measures of Pile Anchor Supporting Structure Under Soft Soil Foundation Excavation Ge Yangcheng' Zhu Jinjun2 Shao Yong? (1.Center of Construction Plan Review in Lianyungang City Lianyungang Jiangsu 222006 China: 2.Department of Architectural Engineering Lianyungang Technical College Lianyungang Jiangsu 222006 China) Abstract:A soft soil foundation excavation using retaining structure of pile and anchor after the pletion of excavation foundation excavation deformation suddenly increased to tens of centimeters and then the projects successfully pleted with the sandbags heap the bottom and steel supporting. Through analysis of field monitoring data one of reasons is fast construction so that deformation can't converge and the other one is in the soft soil pile anchor retaining structure is prone to rotate especially in the larger angle of anchorage and pile embedded depth is shallow so the use of pile anchor retaining structure in soft soil foundation should strengthen the design such as reducing the angle of anchor inc...
软土基坑桩锚支护失效案例及处理措施分析.pdf
