摘要
昔格达土是一种广泛分布于川西南地区的性质特殊的岩层,遇水时易产生滑坡、崩塌等不良地质灾害。为了研究施工过程中不同加筋位置、间距和层数对昔格达土路堤边坡稳定性的影响,本文利用大型有限元分析软件ABAQUS,结合工程实例分别建立了不加筋和加筋有限元模型,并以位移突变为失稳判据利用强度折减法对不同加筋位置、间距和层数对昔格达土路堤边坡稳定性的影响进行了研究,并计算得到了各个模型的边坡安全系数,结果表明在昔格达土路堤中部加筋效果最好,同时从经济角度进一步提出了昔格达土路堤加筋的优化方案。该研究结果对实际施工具有一定的指导意义。
Xigeda is a kind of special rock widely distributed in the southwestern part of Sichuan Province. It tends to lead to landslide and collapse when encountering water. For the purpose of studying the impact of different reinforced positions, reinforced distances and reinforced layers in the construction process on the stability of Xigeda embankment, this paper establishes a unreinforced model and forty-eight reinforced models by ABAQUS in combination with the en- gineering example. Through strength reduction method, the paper obtains the slope safety coefficients and makes the comparative analysis of the models by the criteria of displacement mutation. The result shows that reinforcement in the middle part of the embankment can achieve the best effect. At the end the study puts forward the optimization for the reinforcement of Xigeda embankment,which is of certain guiding significance for practical constructions in future.
出处
《安全与环境工程》
CAS
北大核心
2014年第1期120-124,共5页
Safety and Environmental Engineering
关键词
昔格达土
路堤边坡
稳定性
加筋
强度折减法
Xigeda embankment slope stability reinforcement strength reduction method
