摘要
为研究不同工况下高边坡的变形与稳定性,依托某高边坡工程,采取可靠性理论来分析计算边坡失效概率,从而评价天然状态下和锚杆+框格梁支护、锚杆支护两种支护方案的可靠性与稳定性。结果表明:依据锚杆+框格梁支护边坡的实际施工方案,通过现场实测数据分析,表明边坡处于相对稳定的状态;对岩土体参数进行可靠度分析,得到表层岩土体的黏聚力、内摩擦角、弹性模量、密度参数对结果的影响较其他参数大;通过随机有限元法对边坡进行分析计算,结果显示天然状态下边坡失效概率为35.9%,锚杆+框格梁支护方案的失效概率为1.3%,锚杆支护方案的失效概率为6.1%,表明锚杆+框格梁的支护方案效果最佳。通过数值模拟结果验证边坡实际的防护效果,可为边坡施工提供理论依据,拓展可靠性理论的应用范围。
In order to study the deformation and stability of high slopes under different working conditions, relying on a high slope project, the reliability theory is used to analyze and calculate the failure probability of the slope, so as to evaluate the natural state and anchor+frame beam support and anchor. Reliability and stability of two support schemes for rod support. The results show that: according to the actual construction plan of anchor+frame beam supporting slope, through the analysis of field measured data, it shows that the slope is in a relatively stable state;the reliability of rock and soil parameters is analyzed with the help of ANSYS PDS application, and the surface layer is obtained. The cohesion, internal friction angle, elastic modulus and density parameters of the rock and soil have a greater influence on the results than other parameters;the slope is analyzed and calculated by the stochastic finite element method, and the results show that the failure probability of the slope in the natural state is 35.9%, the failure probability of the anchor rod+sash beam support scheme is 1.3%, and the failure probability of the anchor rod support scheme is 6.1%, indicating that the anchor rod+sash beam support scheme has the best effect. The actual protective effect of the slope is verified by the numerical simulation results, which provides a theoretical basis for the construction of the slope, and promotes the application scope of the reliability theory.
作者
王煜轩
王志丰
王亚琼
WANG Yu-xuan;WANG Zhi-feng;WANG Ya-qiong(School of Highway,Chang'an University,Xi'an 710064,China)
出处
《公路》
北大核心
2023年第1期10-18,共9页
Highway
基金
国家重点研发计划资助项目,项目编号2021YFF0501101
国家自然科学基金资助项目,项目编号52178310。
关键词
边坡工程
随机有限元法
稳定性分析
可靠性评价
现场监测
slope engineering
stochastic finite element method
stability analysis
reliability evaluation
in-situ monitoring
