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为了确保贺家坪连接线K2+710～+890段老路拓宽路堤的整体稳定性和不产生不均匀沉降等病害,文章对土工格栅加固填石路堤稳定性的原理进行了分析,应用岩土工程专业软件Geo-slope,基于极限平衡原理中的Morgenstern-Sprice方法,选择典型断面计算了该路段在铺设土工格栅前后的稳定系数。结果表明:土工格栅对填石材料的作用相当于给填石材料提供一个侧压力增量限制填石材料的侧向变形等,从而使填石材料整体稳定性提高;没有铺设土工格栅前稳定系数为1.023,不能满足有关规范的要求,而在铺设土工格栅后,稳定系数为2.158,满足有关规范的要求。说明路堤铺设土工格栅是必要的,而应用土工格栅增强高填石路堤的稳定性是有效的和合理的。
In order to ensure the whole stability of the embankment of K2 + 710 ~ +890 in Hejiaping connecting line and to broaden the embankment without causing uneven settlement and other diseases, the article analyzes the principle of geogrid reinforcement embankment stability, the application of rock and soil Based on the Morgenstern-Sprice method in the principle of limit equilibrium, Geo-slope software was selected to calculate the stability coefficient of the section before and after the geogrid was constructed by selecting the typical section. The results show that the effect of geogrid on rock filling material is equivalent to providing a side pressure increase for rock filling material to limit the lateral deformation of rock filling material, so as to improve the overall stability of rock filling material. Before the laying of geogrid The stability coefficient of 1.023, can not meet the requirements of the relevant norms, and laying geogrid, the stability factor of 2.158, to meet the requirements of the relevant norms. It shows that it is necessary to lay geogrid on embankment, and it is effective and reasonable to use geogrid to enhance the stability of high embankment.