非圆弧滑面滑坡中满足平衡条件的预应力锚索设计拉力的确定方法

在以往的设计计算中 ,对非圆弧滑坡预应力锚索的设计一般采用指定设计外力而根据整体平衡来确定锚索根数 ,并认为锚索作用力以集中荷载作用在滑面上 ,实际上由于作用在地面的荷载经滑体传递后发生了很大的扩散作用 ,且以往的计算方法是不能找到理论依据的 ,即不满足任何力及力矩的平衡条件 ,因而不尽合理 ,本文根据其受力特点从平衡条件出发 ,导出了确定锚索设计外力的迭代算法公式 ,对工程实际具有较大的理论意义。

THE METHOD OF DETERMING THE DESIGN PULLING FORCES OF THE PRESTRESSED CABLE-ANCORS THAT SATISFYING THE EQUILIBRIUM CONDITIONS IN A NON-CIRCULAR SLIP-SURFACE OF A LAND-SLIP

In the past design and calculation, for the non-circular land-slip, the designing of prestressed cable-anchors is commonly adopted the design forces being determined previously,and the cable-anchors is determinde according to the wholly equilibrium conditions, and the cable-anchor's forces are considered acted at the slip-surface in the forms of concentrated forces, in that they have been spreaded greatly because of the forces acted on the ground-surface have been passed through the slip-body, and the past method cann't be finded a theoretical reason, i.e., satisfying non forces and moment equilibrium conditions, for this the method is not the most satisfactory. this paper has conducted a repeat calculated formula of determing the anchor's designing forces, it may have a great theoretical significance to a practical engineering.