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采用土工格栅加筋处理路堤填土可有效解决路堤填土压缩变形过大的问题,从而减小路桥过渡段桥台与路堤的差异沉降以及缓解桥头跳车的现象.通过现场试验对加筋路堤中格栅上、下表面土压力与格栅变形进行了监测分析.采用有限元方法对比分析路堤在加筋与未加筋2种工况下路桥过渡段路堤变形的差异.结果表明:路堤加筋技术在桥台附近减载作用明显,随着距桥台距离的增加,减载作用逐渐减弱;路堤加筋技术有效减小了桥台与路堤的差异沉降.最后,对桩体弹性模量、桩径、筋材抗拉刚度、路堤填土黏聚力和路堤填土内摩擦角进行了参数分析.
The geogrid reinforced treatment of embankment filling can effectively solve the embankment filling compression deformation is too large, so as to reduce the differential settlement between abutment and embankment of road and bridge transition and alleviate the phenomenon of bridgehead jumping.Through the field test of reinforcement The embankment in the grille, the lower surface of the earth pressure and deformation of the grille were analyzed.Using the finite element method to analyze the embankment in two kinds of reinforced and non-reinforced embankment deformation under the conditions of road and bridge embankment deformation.The results show that: The effect of reinforcement technology is obvious in the vicinity of the abutment and the load-shedding action gradually decreases with the increase of the distance from the abutment. The embankment reinforced technology effectively reduces the differential settlement of the abutment and the embankment.Finally, The pile diameter, the tensile stiffness of embankment, the cohesion of embankment and the internal friction angle of embankment were analyzed.