摘要
本文对具有混凝土防渗墙的土石坝(围堰)进行了考虑泥浆固壁过程的有限元计算,探讨了泥浆固壁施工这一应力历史过程对防渗墙、坝体的应力变形的影响。提出了在平面问题中考虑泥浆固壁过程的计算方法,计算结果表明:泥浆固壁过程对于防渗墙的水平位移、坝体的水平向应力σ_2、小主应力σ_3,和应力水平S的分布均有较为显著的影响。
This paper deals with the FEM calculation considering the slurry trench process in cofferdam or earth dam with concrete diaphragm . The influence of the stress history process on the stress and deformatiou of diaphragm wall and cofferdam is studied. The calculation method for considering the slurry trench process in plane problem is presented. The analysis shows that the effect of the process on the horizontal displacement of diaphragm wall, the horizontal stress, the minor principal stress and stress level distribution of the cofferdam is remarkable, The satisfactory results can be obtained by means of this method.
