复合土钉墙变形分析

Analysis of deformation for composite cement-soil nailing walls

根据水泥土搅拌桩和土钉联合组成的复合土钉墙的受力特征和土钉墙上实测主动土压力分布规律,以弹性地基上的薄板计算理论为基础,对复合土钉墙在开挖过程中的侧向变形计算进行分析与研究,目的是给出复合土钉墙较准确的变形计算公式,通过工程实例对比分析,结果表明理论计算值与实测值吻合较好,证明了该方法的可行性,弹性力学薄板理论能考虑复合土钉墙空间作用的影响,为复合土钉墙的变形控制设计提供了理论依据,可供类似工程应用时参考。

According to the stressed conditions and the field test results of active earth pressure of composite cement-soil nailing wall,based on the elasticity sheet theory method in elastic foundation,the side deformation of composite cement-soil nailing walls in excavation of deep foundation pits was analyzed exactly,and the analytic calculation formula of deformation was also deduced.Through the comparative analysis of composite cement-soil nailing walls for excavation of deep foundation pits in Huaian,and the deformation values by calculated the formula well accorded with the deformation values by field tests. The results show that the preseat method is reliable,constrictive and promising.In addition,the elasticity sheet theory method involves the spatial effect and provides basis for the design and construction of composite cement-soil nailing walls.It can offer reference to similar projects.