摘要
以合肥地铁一号线玉兰大道站基坑工程为研究对象,利用MIDAS/GTS软件建立连续的二维有限元模型,对基坑开挖过程中基底变形进行模拟。通过改变基坑开挖宽度及围护结构嵌入深度,讨论了不同参数对基底隆起变形的影响。研究结果表明:在一定范围内,基底隆起位移随开挖宽度的减小,逐渐从基坑两边向中间移动并叠加;当桩体嵌入深度不满足稳定性要求时,围护桩嵌入深度对基底隆起有较强的抑制作用,当桩体嵌入深度满足基坑开挖的稳定性要求时,这种作用可忽略不计。
Taking the foundation pit engineering in Yulan Avenue of Hefei metro line 1 as the research object, using the MIDAS/GTS software to build a continuous two-dimensional finite element model, the deformation digging of foundation pit is simulated. By changing the width and depth of exterior protected construction of foundation pit, the effect of different parameters on the uplift deformation of basement is discussed. Research results show that in a certain range, the uplift displacement of basement would gradually move and overlap from both sides to the middle with the decreasing of excavation width; when it does not meet stability requirements, the insert depth of exterior protected construction has a strong inhibitory effect on the uplift deformation of basement, when it meets the stability requirements, this effect is negligible.
出处
《湖南文理学院学报（自然科学版）》
CAS
2017年第3期74-78,共5页
Journal of Hunan University of Arts and Science(Science and Technology)
关键词
深基坑
有限元
基底隆起
塑性变形
deep foundation pit
finite element
basement uplift
plastic deformation
