加筋土挡墙土压力及土压力系数分布规律研究
Study on the distributive rule of the earth pressure and its coefficient of the reinforced earth wall
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摘要: 通过对加筋土挡墙大型模型试验土压力测试分析,提出加筋土挡墙的土压力系数应区分为填土自重土压力系数和超载土压力系数。自重土压力系数在墙顶为主动土压力系数,至墙底为静止土压力系数,其间按直线规律变化;超载土压力系数随超载的大小而变化,按从小到大的顺序分别取值Ka,2Ka,2.5Ka和3Ka,它们沿墙高均近似取为常数。土压力系数与土压力数值大小的变化规律相一致。Abstract: By analyzing the earth pressure of the large model test of the reinforced wall,the coefficient of earth pressure can be classified as the coefficient of pressure induced by selfweight and the coefficient of pressure induced by surcharge.The former varies linearly between coefficient of active earth pressure at the top and coefficient of earth pressure at rest at the bottom of wall,and the latter varies with the superimposed load.The coefficient of earth pressure changes accordantly with the value of the earth pressure.
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