【作者】 徐学文；

【导师】 谷拴成；

【作者基本信息】 西安科技大学 ， 岩土工程， 2006， 硕士

【摘要】 本文在查阅大量文献资料的基础上，通过理论分析、实验室试验和数值模拟计算等手段对锚杆的加固机理及其应用进行了初步的研究，主要取得了以下一些成果： (1) 从研究岩土锚杆的工作特性入手，根据锚杆的受力特征，求出了拉力集中型、拉力分散型、压力集中型和压力分散型等各类型预应力锚索锚固段应力分布的理论解，并对它们的分布特征进行了对比分析。 (2) 系统地分析了影响锚杆加固效果的各种因素，给出了锚固长度的理论计算公式，对全长锚固和端部锚固两种主要锚固方式的加固效果做了理论分析并进行比较。 (3) 综合边坡的地质特征和破坏特征对边坡进行了分类，针对不同类型的边坡，提出了不同的加固方法。针对陕西省延安市王良寺经济适用窑小区大型滑坡治理工程的具体实例，考虑到边坡类型、经济情况和施工方便等因素，本文提出主要用预应力锚索加固该边坡的方案。文中首先运用极限平衡法计算得出了设计边坡的最危险滑移面，然后给出预应力锚索加固边坡的整体设计方案，最后运用有限元强度折减法对边坡稳定性进行分析，分析结果显示，随着土体抗剪强度值的降低，边坡的塑性区从坡底沿着滑动面不断地向坡顶延伸，边坡最危险滑移面和先前由极限平衡法计算得到的滑移面相似。经过对土体强度参数多次折减的计算，确定设计边坡的安全系数为1.35，符合规范的要求，说明设计方案是合理的。更多还原

【Abstract】 Based on a lot of documents, the thesis acquires some achievements by the way of theory analysis, laboratory test and numerical simulation as follows:(1) Beginning with the analysis of bolt working and mechanical characteristic, this thesis obtains the theoretical stress-distribution solution of pulling force intensive and dispersive style prestressed-anchor, pressure force intensive and dispersive style prestressed-anchor, then the comparison analysis of different distribution characteristic is done.(2)The influence factor of bolt reinforcemental effect is systematically researched, and a theoretical formula of calculating the bolt-consolidation length is presented in this thesis forced mechanism of bolt in the different working circumstance. In terms of point-anchorage and fully-anchorage, the consolidation effect is compared and analyzed.(3)About the Wangliangshi economical kiln areola landslide project, consideration of the slope type and construction convenience, this thesis presents the consolidation scheme of using prestressed-anchor. The most dangerous slipping face is calculated by the limit balance method, and the design scheme of prestressed-anchor reinforcement is presented. The stability factor of consolidated slope is calculated by the FEM strength reduction method. The calculation result indicates that the slope plastic area along the slipping face uninterrupted expanding to top of slope by the reduction of soil strength parameters, and the most dangerous slipping face calculated by strength reduction method is similar to the result calculated by limit balance method, the slope stability factor is defined as 1.35 after many times calculation. According to the specification of national standard, the result of calculation shows that the design scheme is scientific and reasonable.更多还原