摘要
在基坑工程设计中,常忽略基坑空间形状对其变形的影响,将其简化为二维平面问题进行分析,这就在经济上造成了一定的浪费。通过采用数值模拟方法研究长宽比对基坑变形的影响。计算结果表明:当基坑长宽比L/B小于2时,随着L/B的变化,基坑长边方向围护结构水平位移和基坑基底隆起变形具有明显的变化;当L/B超过临界值2后,其变化不再明显,而是趋于一稳定值,与按二维平面问题分析所得结果差距较小。对于基坑短边方向围护结构水平位移和基坑长边方向坑外土体地表沉降而言,基坑长宽比L/B的变化对其影响并不显著。
The plain strain method often used in design, and the influence of space shape on the excavation foundation pit deformation was usually ignored to simplify design and research of foundation pit. Therefore, some economical wastes are caused. Based on numerical simulation methods, the influence of difference aspect ratio on foundation pit deformation has been investigated. The results show that, when L/B is less than 2, the retaining structure horizontal displacement and bottom upheaval deformation of foundation pit varies have obviously changed with the change of L/B, and when L/B is greater than 2, the change is not obviously and tends to a stable value. There is no obvious difference between 3D and 2D in computation when L/B is greater than 2. The displacement of foundation pit retaining structure in short edge and ground surface settlement of the pit soil in long edge have no obvious change with the change of L/B.
出处
《南昌航空大学学报（自然科学版）》
CAS
2015年第1期89-93,99,共6页
Journal of Nanchang Hangkong University(Natural Sciences)
关键词
基坑工程
空间效应
长宽比
变形
excavation
spatial effect
aspect ratio
deformation
