拱形支撑结构在基坑工程中的应用效果分析

基坑变形分析及其控制技术一直是工程界的热点和难点问题之一。首先对开挖卸荷后的基坑变形进行了介绍，然后对现有的直撑支护系统作用下，基坑变形的不可恢复、不可调节性及适应变形的不确定性等问题进行了总结；再结合基坑变形特点及拱形结构可在较小竖向荷载作用下产生较大横向张力的功能，对拱撑结构应用于基坑工程的效果进行了分析，指出拱撑支护系统可实现基坑的变形动态控制与调节，最大程度地确保基坑工程施工的安全与稳定。

Analysis on Application Effect of Arch Brace in Foundation Pit Engineering

Foundation pit deformation analysis and control technology are always one of the hot and difficult problems in geotechnical engineering.In this paper,the deformation of foundation pit is briefly introduced after excavation unloading.Then,the current linear supporting system in foundation pit,which can not restore or adjust the deformation and may adapt to the deformation,is summarized.Finally,combined with the deformation characteristics of foundation pit and the function of arch structure which can produce larger lateral load under smaller vertical load,the effect of arch brace applied in foundation pit engineering is analyzed.It is concluded that arch support system can dynamically control and adjust the deformation of foundation pit to ensure safe and stable construction of foundation pit engineering to the largest extent.