摘要
岩质边坡防护的最有效措施就是锚固工程。然而锚固参数(包括锚杆或锚索长度、锚固间距、预应力大小等)的选取至今在理论上未能很好解决,在实际工程中也未体现出合理的优化设计。以云沱段狮子包边坡2-2′剖面(K0+85.7 m)为例,运用正交试验设计法分析锚固参数的组合方案,以边坡稳定性系数作为评价指标,分别改变锚固参数,以此分析对边坡稳定性的影响。研究结果表明,对边坡稳定性影响显著的因素由大至小的顺序是:预应力大小、锚固间距、锚杆长度。以此研究结果为该实例的锚固支护参数选取确定了设计方案,最后采用有限差分程序FLAC3D进行了锚固效果数值分析验证。
engineering is the most effective measure to protect rock slopes. However, the choosing of the anchorage parameters such as length, spacing and prestress value etc. was still not well enough resolved theoretically and not designed reasonably in the practical engineering. Take the Shi-zi-bao rock slope as example, firstly orthogonal test design method is adopted to analyze the compound program. Then choose the stability factor as the evaluating indicator, and the anchorage parameters are changed to study the influences on the stability of slope. The calculation results show that the influence sequence （from large to small） of the parameters is： prestress value, spacing and length. Based on the analysis of calculation, the optimum anchorage parameters are chosen for the project, in the last numerical simulation used the Lagrangian difference method FlAC3D is employed to verify the anchorage effect.
出处
《山地学报》
CSCD
北大核心
2007年第3期364-369,共6页
Mountain Research
基金
湖北省自然科学基金项目(编号:2005ABA277)~~
关键词
锚固参数
边坡稳定性
正交试验
锚固效果
anchorage parameters
stability of slope
orthogonal test
anchorage effect
