针对在某泵站基坑开挖过程中应用的超长跨度地下连续墙, 首先采用ABAQUS 有限元软件对抽水泵站基坑 分四个开挖步进行渗流计算, 在确定基坑地下连续墙两侧的地下水位分布规律后, 再进行变形计算。结果表明: 第 四次开挖完成后, 靠近基坑侧D4 断面地下连续墙不同深度顶端横河向位移最大, 达到35 mm。据此建议将B42F4 段南岸地下连续墙墙体厚度适当加厚变为100 cm, 以减小南岸地下连续墙在基坑开挖过程中的横河向变形。

The super2long span under gr ound co nt inuo us wall was applied in the ex cav ation of foundatio n pit of a pump statio n. In this paper, the finite element softw ar e ABAQUS w as used to determine the seepag e of the pump stat ion in four ex cavatio n steps. T he distr ibution law of g roundw ater levels at bo th sides of underg ro und co nt inuo us w all was obtained, and the deforma2 tion of the pit w as estimated. The results showed t hat the transver se displacement at the t op o f under gr ound w all in D4 sectio n of different depths is the larg est, w hich is about 35 mm. Subsequently , the thickness of the under gr ound continuous w all on the so uth bank in B42F4 section is sugg ested to incr ease to 100 cm in or der to r educe t he tr ansv erse displacement.