基于位移控制的单支点桩锚支护结构的优化设计

The Optimization Based on the Displacement Controlling on Single Fulcrum Pile-anchor Retaining Structure

考虑单支点桩锚支护结构的刚体位移和弯曲变形,建立了锚杆锚固点和支护桩顶的水平位移计算方法.通过分析水平位移的各个影响因素对位移的作用,指出锚杆位置下移会增加锚杆的拉力并进而加大其配筋,但可以减小桩顶在锚杆张拉锚固后的水平位移变形.以位移控制为目标,通过调整锚杆的位置,对单支点桩锚支护结构的设计进行优化.

The approach is established to calculate the displacement of the anchor pre-tensioned point and the top end of the retaining pile taking into consideration the bending deformation and rigid displacement of single fulcrum pile_anchor retaining structure. By analyzing the influence on the displacement among every factors,the approach proposes that the downward anchor can increase its tension and reinforcement,but it also can reduce the horizontal displacement of the top end of the pile after the ancher is pre_tensioned. Finally, the design about the single fulcrum pile_anchor retaining structure is optimized by adjusting the position of anchor to make the displacement of the top end of the pile the smallest.