山东大学学报 (工学版) ›› 2023, Vol. 53 ›› Issue (6): 100-107.doi: 10.6040/j.issn.1672-3961.0.2023.017
• 土木工程 • 上一篇
扈萍1,李萌1,滕越1,马少坤2, 张西文1
HU Ping1, LI Meng1, TENG Yue1, MA Shaokun2, ZHANG Xiwen1
摘要: 针对目前基坑开挖应力路径研究中缺乏对主应力偏转影响的考虑,引入主应力方向角的概念并推导了其计算方法,建立了p-q-α三维应力状态体系。以黏土超深基坑开挖工程为算例,采用有限元软件ABAQUS模拟基坑开挖全过程,对基坑不同区域关键位置点在开挖卸荷过程中的三维应力路径进行了研究。结果表明,坑底土体平均压应力p减小,广义剪应力q先减小后增大,主应力方向角α偏转幅度较大;坑侧土体主应力方向角α有明显偏转,但应力路径的发展与支撑的设置密切相关,基坑坡顶土体则几乎不发生主应力轴偏转。
中图分类号:
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