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为研究车辆荷载作用下加筋土挡墙的静动力响应规律,以330国道K139+100~K139+400路段的模块式加筋土挡墙为原型,通过埋设动静土压力盒、柔性位移计以及加速度计等元器件,测试了车辆荷载作用下加筋土挡墙的筋材拉应变、面墙后侧向土压力、加筋体后侧向土压力和挡墙的侧向变形等。结果表明:车辆荷载作用时,挡土墙面墙上部的响应加速度远大于下层;当车辆荷载作用在加筋体上时,车辆行车距离对加筋体内产生的动土压力影响不大,当车辆荷载作用在加筋体后时,车辆行车距离对加筋体内的动土压力大小及分布模式有很大影响。无论是在车辆静载作用下还是在车辆动载作用下,加筋体后侧向土压力远大于面墙后的侧向土压力。
In order to study the static and dynamic response of the reinforced earth retaining wall under vehicle load, the modular reinforced earth retaining wall of K139 + 100 ~ K139 + 400 section of 330 national highway was taken as the prototype. Through the buried earth pressure box, flexible displacement gauge and Accelerometer and other components to test the tensile strength of the reinforced earth retaining wall under the vehicle load, the lateral earth pressure behind the wall, the lateral earth pressure behind the reinforced body and the lateral deformation of the retaining wall. The results show that the response acceleration of the upper part of retaining wall is far greater than that of the lower layer when the vehicle load is acting on it. When the vehicle load acts on the stiffened body, the vehicle distance has little effect on the earth- When acting on the stiffened body, the driving distance of the vehicle has a great influence on the earth pressure and distribution mode in the stiffened body. The lateral earth pressure of the reinforced body is much larger than the lateral earth pressure behind the wall, no matter under static loading or under dynamic loading.