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基坑开挖对邻近桩筏基础数值分析

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文中结合某地铁基坑开挖工程实例,利用Plaxis2D软件,土体采用土体硬化模型的,对基坑开挖过程中不同工况下围护桩变形及其对邻近桩筏基础的影响进行数值模拟,计算结果表明,围护桩水平位移沿深度变化形态与支撑密切相关,拆撑顶板时为最不利工况,建筑桩基最大水平位移为14.7 mm,应加强对建筑桩基的施工监测,为同类工程提供参考依据.
NUMERICAL ANALYSIS OF FOUNDATION EXCAVATION ON ADJACENT PILE RAFT FOUNDATION
Based on a project of a subway foundation excavation, the deformation of the retaining piles and their im-pact on adjacent pile raft foundations under different working conditions during the excavation process are numeri-cally simulated with hardening model of soil by Plaxis 2D software. The calculation results show that the level dis-placement of the retaining piles is closely related to the depth variation and support, and the removal of the support top plate is the most unfavorable working condition. The maximum horizontal displacement of the building pile foun-dation is 14.7 mm, construction monitoring of building pile foundations should be strengthened.

foundation excavationPlaxis 2Dsoil hardening modelmost unfavorable working conditions

郭兴成、周徐峰、王锦文、占川

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浙江广川工程咨询有限公司,杭州310020

浙江省水利水电工程管理协会,杭州310020

绍兴市舜安水利工程管理有限公司,浙江绍兴312000

温州龙达围垦开发建设有限公司,浙江温州325024

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基坑开挖 Plaxis2D 土体硬化模型 最不利工况

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(3)
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