预应力垂直锚重力式围护结构计算分析

Calculation and analysis of gravity wall reinforced by vertical prestressed anchors

预应力垂直锚重力式挡墙需要一种合理的工程计算方法。挡墙锚杆试验表明,锚杆的预应力随着深度变化而不同,在稳定分析和位移计算时要考虑相应的折减系数。在试验的基础上,根据地基反力系数m法,建立了弹性挡墙的挠曲微分方程,通过幂级数求解,提出了预应力锚杆式水泥土挡墙变形的工程计算方法,并结合工程实例对该方法进行了验证,验证结果与试验数据吻合较好,为预应力锚杆式水泥土挡墙结构设计提供了估算依据。

A new engineering method for calculating the gravity wall reinforced by vertical prestressed anchors is needed.The prestress of vertical anchored bar changed as the deepth changed and the reduction factor was considered based on some experimental results.According to m-method,the differential equations of an elastic retaining wall were established.A new engineering method was presented by a power series solution.The solution results and the test results agree well,and the new method could be an estimation reference.