挡土墙地震土压力及其分布

Distribution of Seismic Soil Pressure on a Retaining Wall

采用Mononobe-Okabe理论的基本假设，给出了地震加速度沿墙高均匀分布和线性分布两种情况下的地震土压力强度、地震土压力合力和地震土压力合力作用点的理论公式，并研究了有关因素对地震土压力及其分布的影响。结果表明，地震土压力合力与Mononobe-Okabe理论给出的结果相同，地震土压力强度为非线性分布，地震土压力合力作用点在基础以上0.42-0.46倍墙后填土高度处，与大量实验研究成果相吻合。

On the basis Assumption of Mononobe-Okabe theory, the theoretical formula of the unit seismic earth pressure, the resultant seismic earth pressure and the point of action of resultant seismic earth pressure for the case of uniform distribution and linear distribution of seismic acceleration along the height of wall are obtained. The ef- fects of various factors on seismic earth pressure and distribution are also investigated. The results show that the resultant seismic earth pressure is the same as that given by Mononobe-Okabe theory, the distribution of seismic earth pressure is non-linear, the point of action of the resultant seismic earth pressure is 0. 42--0.46 times higher than the height of backfill above the foundation, and it is identical with a large number of experimental results.