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地震土压力研究是挡土墙抗震设计的核心内容。汶川地震震害调查发现建于土质地基上的挡土墙较建于岩质上的更易发生震害,因此,研究地基条件对挡土墙地震土压力的影响是十分必要的,然而目前许多国家的铁路或公路抗震设计规范中未包含地基条件对挡土墙地震土压力的影响。鉴于此,为了深入了解地基条件对挡土墙地震土压力的影响,利用大型振动台试验这一最能直接反映地震响应特征的动力研究手段,就地基条件对挡土墙地震土压力的分布形式、合力大小、合力作用点位置的影响开展研究,并把实测结果与几个国家的抗震设计规范进行了对比,提出了挡土墙的抗震设计建议。
Seismic earth pressure research is the core of retaining wall seismic design. The Wenchuan earthquake damage survey found that the retaining wall built on the soil foundation is more prone to damage than the rock. Therefore, it is necessary to study the influence of foundation conditions on the earth pressure on the retaining wall. However, many countries Of the railway or highway seismic design code does not include the influence of foundation conditions on retaining earth pressure. In view of this, in order to gain a better understanding of the influence of foundation conditions on the earth pressure on the earth retaining wall, a large-scale shaking table test, the dynamic research method that directly reflects the seismic response characteristics, is used to analyze the distribution of earth pressure on the earth- , The size of the resultant force and the location of the resultant force point, and compared the measured results with the seismic design codes of several countries, and proposed the seismic design suggestions of the retaining wall.