南华大学学报（自然科学版）2026，Vol.40Issue(1)：31-40,10.DOI:10.19431/j.cnki.1673-0062.2026.01.005
含损伤岩体的深基坑开挖对邻近桥梁桩基变形与受力的影响
The deformation and stress influence of deep foundation pit excavation with underlying damaged rock mass on adjacent bridge pile foundations
侯宇宙 1余勇 1孔永明 1丁辰昱 1周世杰 1戴兵2
作者信息
- 1. 中国建筑五局第三建筑有限公司,湖南 长沙 410021
- 2. 南华大学 资源环境与安全工程学院,湖南 衡阳 421001
- 折叠
摘要
Abstract
Urban subway tunnel construction frequently requires traversing complicated ge-ological environments and nearby structures.The excavation of deep foundation pits invol-ving underlying damaged rock masses is prone to inducing deformation in adjacent bridge pile foundations,thereby threatening engineering safety.To address the deficiencies in ex-isting research regarding dynamic unloading damage mechanisms and the interaction be-tween rock-soil masses and pile foundations,a quantitative relationship between the geo-logical strength index(GSI)and the damage variable is established.Based on a subway foundation pit engineering case in Guangzhou,a coupled numerical model encompassing the damaged rock mass,foundation pit,and pile foundation is developed using FLAC3D to analyze the impact of foundation pit excavation on the deformation behavior of adjacent bridge pile foundations.The results demonstrate that:1)it is feasible to employ damage mechanics parameters for the numerical simulation of the impact of deep foundation pit exca-vation with underlying damaged rock masses on adjacent bridge pile foundations;2)the re-taining structure and the properties of the rock and soil masses exert a significant influence on stability during foundation pit excavation;and 3)the rock mass damage effect amplifies the horizontal displacement of the pile foundations,which exhibits a non-linear growth trend as the excavation depth increases.These research findings can provide a theoretical basis for risk control in engineering projects situated within sensitive urban environments.关键词
地铁基坑/损伤岩体/深基坑开挖/桥梁桩基Key words
metro excavation/damaged rock mass/deep excavation/bridge pile foundation分类
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侯宇宙,余勇,孔永明,丁辰昱,周世杰,戴兵..含损伤岩体的深基坑开挖对邻近桥梁桩基变形与受力的影响[J].南华大学学报（自然科学版）,2026,40(1):31-40,10.
