泵站基坑开挖中的地下连续墙有限元结构计算

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B4-F4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.

Finite element structural calculation of underground continuous wall in excavation of pump station foundation pit

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.