锚索自由段长度对锚索桩内力的影响

在横向变形约束弹性地基梁法分析锚索桩内力的基础上,详细阐述了锚索自由段长度对锚索拉力与桩身内力的影响,说明了锚索自由段长度是影响锚索桩内力的一个较为重要的因素。通过工程实例分析,指出在同一加固工程中,若锚索自由段长度减小,则锚索拉力增大,桩身内力(剪力、弯矩)减小,对于桩体发挥其承载能力有利,提出可以通过适当注浆来减小锚索自由段的有效计算长度,以改善锚索桩的受力状况。

Analysis of Influence of Length of Free Section of Anchor Cable on Internal Force of Anti-slide Pile with Prestressed Anchor Cable

Based on the analysis of internal force of an anti-slide pile with prestressed anchor cable by the method of elastic foundation beam with restriction of transverse deformation,it is shown in detail that the length of free section of anchor cable is of influence on internal force of an anti-slide pile with prestressed anchor cable.According to the analysis of a practical project,the length of free section of anchor cable is an important factor.It is shown that the pulling force of the anchor cable will be increasing and internal force of the pile will be decreasing with the decreasing of the length of free section of anchor cable,which is benefit for load capacity of the pile.In addition,it is pointed out that effective length of free section of anchor cable can be reduced by proper and rational grouting in order to improve load capacity of the pile.