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中文摘要：
某软土基坑采用桩锚支护结构,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,特别是在锚索锚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。
英文摘要：
A soft soil foundation excavation using retaining structure of pile and anchor, after the completion of excavation,foundation excavation deformation suddenly increased to tens of centimeters,and then the projects successfully completed 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,increasing pile length and so on.
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