基坑变形异常原因分析及锚索设计优化及其应用

Analysis of abnormal deformation of foundation excavation and optimization of anchor cable design and its application

在峰华工业区城市更新项目深基坑监测数据基础上,通过有限元建模,分析基坑开挖过程中支护桩变形监测数据异常原因,探索锚索受力机理。根据场地条件限制、土层地质的差异性,设置不同的锚索设计方案。通过调整锚索预应力锁定值,建立有限元模型和弹性支点法,对设计方案进行对比分析,最后得出各道锚索均发挥效益的优化方案。

Based on the monitoring data of the deep foundation pit of the urban renewal project of Fenghua Industrial Zone,through finite element modeling,the reason for the abnormality of the deformation monitoring data of the supporting pile during the excavation of the foundation pit is analyzed,and the mechanism of the anchor cable force is explored.According to site conditions and differences in soil geology,different anchor cable design schemes are set up.By adjusting the anchor cable pre-stress locking value,establishing the finite element model and the elastic fulcrum method,the design schemes are compared and analyzed,and finally an optimized scheme for each anchor cable to exert its benefits is obtained.