框架预应力锚杆边坡支护结构顶部静力位移求解及其所受影响因素分析

框架预应力锚杆支护结构的顶部静力位移是一个重要的变形控制指标.选取梯形土压力模型,基于稳定性极限平衡理论提出采用力法求解其顶部静力位移,分析地面施工荷载和锚杆间距设计参数即第一排锚杆离坡顶的距离、锚杆水平间距和锚杆竖向间距对顶部静力位移的影响.结果表明边坡地面施工荷载和锚杆水平间距对位移影响不明显,而第一排锚杆离坡顶的距离和锚杆竖向间距对边坡顶部位移的影响非常显著.

Solution of top static displacement of the grillage supporting structure with pre-stressed anchors and analysis of its subjected influences

The top static displacement of grillage supporting structure with pre-stressed anchors is an important controlling index for structural deformation.By using trapezoid earth pressure model,the force method is proposed to solve the top static displacement based on the theory of limit equilibrium of stability.The influences of slope ground construction load,spacing design parameters,such as the distance of the first anchor below the slope top,the horizontal spacing and the vertical spacing,on the top static displacement were analyzed.The results shown that the influences of ground construction load and horizontal spacing on the displacement were indistinct,but those of the distance of the first anchor below slope top and vertical spacing on the displacement were very distinct.