路基挡土墙填土碾压中土压力和位移试验研究

当公路路基挡土墙填筑时,挡土墙受到土体的侧向挤压作用,特别是在碾压时会产生巨大的侧向土压力,导致挡土墙的倾斜。结合盐城示范公路路基挡土墙工程的现场实测数据进行研究,发现在碾压时水平和竖向土压力均有很大增加,但随着压路机的驶离,两者均瞬间减小,但竖向减小的幅度大于水平向;位移的变化随填土高度增加而增加,且后期增加较快。

Experimental Study on Soil Pressure and Displacement in Filling and Rolling of Subgrade Retaining Wall

In filling of soil retaining wall for highway subgrade,the wall is under lateral compression applied by the soil mass,especially,subject to enormous lateral soil pressure in rolling,and declined after then.With the measured data of a demonstration project of subgrade retaining wall for highway in Yancheng,studies were carried out,and it was found out that there was a big jump on the horizontal and vertical soil pressure in rolling,however,as the road roller was driven away,the both come down immediately with the vertical one reducing to a larger extent than the horizontal one the change of displacement increases with the filling height and even faster in the later period.