土钉墙与桩锚组合支护结构在深基坑工程中的应用

基于FLAC3D软件，对北京某深基坑土钉墙与桩锚组合支护结构进行数值模拟分析，并与实测值进行对比。研究结果表明:上部土钉墙支护结构，最后一排土钉最大拉力位置在中后部，不同于单一的土钉墙支护最后一排土钉的受力情况，在设计时应适当加长最后一排土钉的长度；锚索对桩顶位移的限制作用比较明显，锚索的受力值小于设计值，在设计时可以考虑适当减小锚索的长度。

Application of Soil Nailing Wall and Piled Anchor Combined Supporting Structure in Deep Foundation Pit Engineering

Based on FLAC3D software, the numerical simulation analysis was done for deep foundation pit soil nailing wall and piled anchor combined supporting structure in Beijing and the value was compared with actually measured value. The research results showed that the upper soil nailing wall supporting structure, the maximum tension of last row soil nailing is at the middle rear part. Different from the stress of single soil nailing wall supporting the last row soil nail, the last row soil nail can be lengthened appropriately. The anchor cable can obviously restrict the pile top displacement. The stress of anchor cable is smaller than the design value. In the design, the anchor cable can be shortened appropriately.