首页|桩锚深基坑开挖受力变形特性数值分析

桩锚深基坑开挖受力变形特性数值分析

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随着基坑工程向更大更深方向发展,它所处的地层分布及围护结构设计变得愈发复杂.为研究桩锚支护深基坑开挖过程中的受力变形规律,文中以昆明某深基坑工程为研究对象,运用有限元数值模拟方法对基坑开挖过程中的受力变形规律进行分析,研究基坑开挖过程中的围护桩水平位移、桩身弯矩、坑底隆起及地表沉降的变化规律.研究结果表明,围护桩水平位移和桩身弯矩随开挖深度H增加而增大,最大水平位移位于0.85H处,最大弯矩作用在桩身-14.5 m处;坑底隆起随着基坑开挖由"凸"型隆起逐渐变为"M"型隆起,最大隆起量为47.4 mm;地表沉降呈"V"型分布,最大沉降发生在距坑边0.3H处.
NUMERICAL ANALYSIS OF STRESS AND DEFORMATION CHARACTERISTICS IN PILE-SUPPORTED DEEP EXCAVATIONS
As excavation in foundation pit engineering advances to greater depths,the complexity of the soil distri-bution and supporting structure design increases.This study focuses on a deep foundation pit project in Kunming,us-ing finite element numerical simulation to analyze the stress and deformation patterns during the excavation process.It investigates the variations in horizontal displacement of support piles,bending moments in the piles,bottom heave,and surface settlement.The findings indicate that both horizontal displacement and bending moments of the support piles increase with excavation depth(H).The maximum horizontal displacement occurs at 0.85H,and the maximum bending moment is at a depth of-14.5 meters in the pile.Bottom heave evolves from a"convex"shape to an"M"shape,with a maximum heave of 47.4 mm.Surface settlement shows a"V"shape distribution,with the maxi-mum settlement occurring 0.3H from the pit edge.

deep foundation pitpile anchor supportnumerical simulationfencing pilesdeformation law

刘宇

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上海隧道工程有限公司,上海 200232

深基坑 桩锚支护 数值模拟 围护桩 变形规律

2024

低温建筑技术
黑龙江省寒地建筑科学研究院

低温建筑技术

影响因子:0.237
ISSN:1001-6864
年,卷(期):2024.46(9)