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针对高陡路堑边坡设计一般只简单采用极限平衡法进行成型边坡稳定性验算的现状,以广贺高速公路高陡路堑边坡为工程背景,采用数值分析方法对高速公路高陡路堑边坡施工开挖过程进行了模拟,对比分析了不支护与及时支护开挖过程的边坡稳定性,指出了开挖过程的危险阶段,分析了及时支护的效果与必要性,提出了施工优化步骤。结果表明:有限元计算可以实现边坡分层开挖分层加固施工工序的优化设计,锚固支护有效改善了边坡体受力状态与临界塑性应变特征。
For the design of high and steep cut slopes, the simplest method to calculate the slope stability of profiled slopes is simply adopted. Taking the high steep cutting slope of Guanghe Expressway as the engineering background, numerical analysis method is used to analyze the high-steep cutting slope of expressway The process of construction excavation was simulated. The stability of slope without support and timely support excavation was analyzed. The dangerous stage of excavation was pointed out. The effect and necessity of timely support were analyzed. The construction optimization step. The results show that the finite element method can optimize the construction process of stratified slope excavation, and the anchorage support can effectively improve the stress state and critical plastic strain of the slope.