边坡抗滑桩的土拱效应和设计参数分析

Soil-arch Effection and Design Parametric of Slope Stabilizing Piles

通过对边坡抗滑桩土拱效应和桩的设计参数进行分析,研究抗滑桩设计的影响因素。土拱效应对桩间距有显著影响,因而应根据对土拱效应的分析,选择最具成本效益的桩间距,使桩间产生最大土拱效应。在其他条件不变的情况下,桩的成拱能力随桩后土体内摩擦角的增大而增大,随直径的增大而减弱;桩间距随内摩擦角的增大而增大。抗滑桩设计时应同时考虑土拱效应、地基刚度和埋置深度等多种因素的综合影响,在保证其安全的同时提高经济效益。

By analyzing soil arching and design parametric of slope stabilizing piles,their effecting factors were studied. The soil arching effect has significant influence on pile spacing,so the most cost-effective pile spacing should be chosen according to the analysis of soil arching to generate the largest spacing soil arching between the piles. If other conditions remain un- changed, the capacity of arching is increasing with the increase of internal friction angle of soil behind piles, and decreasing with the increase of diameter. The pile spacing increases with the increase of internal friction angle of soil behind piles. When slope stabilizing piles are designed,soil arching, foundation stiffness, the depth of pile embedment and other effective factors should be considered to ensure both the safety and the improvement of its economic efficiency.