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桩承式加筋路堤与路堤填土加筋技术联合应用于黄土地区路桥过渡段,减小路桥过渡段差异沉降和桥头跳车现象。通过现场试验对桩承式加筋路堤中心轴和路肩对应位置处格栅上、下表面桩顶和桩间土土压力、桩间格栅变形以及加筋路堤各断面格栅上、下表面土压力和格栅变形进行监测分析,研究结果表明:桩承式加筋路堤通过土拱效应和张拉膜效应将路堤荷载向桩顶转移,从而可有效减小桩间土荷载;桩承式加筋路堤中心轴处路堤荷载转移主要以土拱效应为主,以张拉膜效应为辅,而路肩处格栅张拉膜效应较显著,路堤荷载传递由土拱效应和张拉膜效应共同完成,格栅在路肩处发挥作用效果大于路堤中心轴处;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。
The application of pile-supported reinforced embankment and embankment reinforced technology in road and bridge transitional section of loess area reduces the differential settlement of road and bridge transition and the phenomenon of bridge jumping. Through the field test, the top and bottom soil pressure, the deformation of the piles between the piles on the upper and lower surfaces of the grille and the upper and lower surface soil Pressure and deformation of the grille. The results show that: the piled reinforced embankment can transfer the embankment load to the top of the pile through the soil arching effect and the tension membrane effect, which can effectively reduce the soil load between piles; Embankment central axis embankment load transfer is mainly dominated by soil arching effect, supplemented by the tension membrane effect, and the road shoulder grille tension membrane effect is more significant, embankment load transfer by soil arching effect and tension membrane effect together The effect of the grid on the shoulder is greater than the central axis of the embankment. The effect of embankment reinforcement on the abutment near the abutment is obvious. With the increase of the distance from the abutment, the load shedding gradually decreases.