某围护结构上土压力实例分析

Research on the soil pressure of a fender structure

对某公路大桥超深锚锭基础围护结构上实测的土压力、孔隙水压力分布及其位移变化规律进行了详细分析。围护结构上土压力的实测值远小于计算的主动土压力值,且随开挖加深而不断减少,变化规律也随土层分布的差异而有所不同,围护结构上的侧向位移随开挖加深不断减少,孔隙水压力的变化受坑外水位影响较大。

The measured soil pressure,the distribution of porewater pressure and the changeable law of displacement of a fender structure in a highway bridge are analyzed in detail in this paper. The results indicated the measured soil pressure of fender structure is much less than the calculated soil pressure, and it is decreased with the increase of excavation depth,and the changeable law is different with the distribution of soil layer. The lateral displacement is decreased with the increase of excavation depth,and the change of porewater pressure is more affected by water level of outer pit.