框架预应力锚杆高边坡加固机理及优化设计研究

The Reinforcement Mechanism of High Slope and Optimization Design Research Using the Frame Supporting Structure with Prestressed Anchor

框架预应力锚杆在高边坡加固广泛应用,目前计算理论主要以纵梁受力为主的二维计算,没有考虑纵横梁相交弯矩影响,忽视横梁受力。在此基础上,结合兰州市某高边坡设计实例进行三维有限元计算分析,框架梁受力较大区域主要集中在边坡下部,且横梁受力产生弯矩并不比纵梁小,说明框架梁设计时,必须考虑横梁的受力;在工程设计时,根据内力大小分区进行结构设计,这样对节省材料,降低工程造价十分必要。

The frame supporting structure with pre-stressed anchor is widely used in high slope reinforcement. The current calculation theory for the the frame supporting structure mainly focuses on the girder stress through two-dimensional calculation,without considering the stringer and girder bending moment interaction effects and the stringer stress. On this situation,combined with some high slope design example in Lanzhou through three dimensional finite element analysis,it reveals that the frame supporting structure with high stress is mainly concentrated on the lower part of slope,and the bending moment of the stringer is not smaller than the girder. So in the frame supporting structure design,the stress of the stringer must be considered. In engineering design,it is necessary to do structure design based on the stress partition of the frame supporting structure for saving materials and reducing the project cost.