挡土墙墙后土体放坡卸荷时土压力计算方法研究

挡土墙后面土体放坡卸荷可以减小挡土墙上的主动土压力,但目前还没有相应的计算方法。根据墙背土体放坡时土楔达到主动极限平衡的条件,推导出作用在墙背的主动土压力计算公式,并计算了土楔与水平方向的夹角。

Study on Soil Pressure Calculation Method During Soil Mass Sloping Unloading at Back of Retaining Wall

The sloping unloading of soil mass can decrease the initiative soil pressure on retaining wall,and but there is no relevant calculation method now.Based on the initiative utmost balance condition of soil wedge during the soil mass sloping at the back of retaining wall,the article educes the initiative soil pressure calculation formula of action at the back of retaining wall,and calculates the included angle of soil wedge with horizontal direction.