半填半挖路段土工格栅加筋路堤稳定性分析

Analysis on the Stability of Part-cut and Part-fill Embankment with Reinforced Geogrid

深入分析了土工材料在半填半挖路堤的加固机理及路堤的破坏模式。在此基础上,针对在填挖交界面设置系列台阶的工程实际情况,建立了合理的半填半挖路堤稳定性分析模型,该模型可充分考虑填挖交界面台阶的影响及土工加筋材料的加固功能,利用极限平衡法对稳定性系数进行求解。最后,结合工程实例进行了对比分析,结果表明,设置台阶及土工合成材料可较大的增强路堤的抗滑能力。

The reinforcement mechanism and failure model of part-cut and part-fill embankment is discussed deeply in the paper firstly. Then, aiming at the steps which set at the cut to fill location, a rational analysis model for stability of the embankment which can consider the influence of the steps and the reinforcement of geogrid is established, so the stability factor is solved by using limit equilibrium method. Finally, comparison analysis has been done combined with engineering, the results shows that the steps and reinforcement geogrid can improve the slide-resistant ability of part-cut and part-fill embankment.