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Journal | [J] 当代水利水电 Volume 4, Issue 10. 2022.
无粘性土中浅基础沉降的有限元分析
作者 : Hind Nadhum Raheem
DOI: 10.12361/2705-0491-04-10-111075
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摘要 / Abstract
在浅基础设计过程中，极端沉降会导致使用性问题。由于沉降控制着与土壤承载力相关的主要设计标准，因此 估算松散砂土上的浅基础沉降是一个高度复杂的问题。对于桥梁、发电厂和土坝等重要结构，必须减少沉降，以确保 工程结构的稳定性，换言之，任何额外的沉降都可能在超过允许值时导致连续的结构损坏。在本研究中，使用 PLAXIS 3D 程序（用于解决许多岩土工程问题），使用（10×10×10）m 的松散砂模型来研究浅层各种参数的影响。该程序已用 于研究影响（施加荷载强度 100、150、200 KN、形状（圆形正方形）、基础宽度（0.75、1、1.5）m、下伏土壤的内摩 擦角（24、33、37）度和影响地下水位）。得出的结论是，形状、摩擦角和弹性模量的估算基于一个关系，该关系与 powell 和地下水位预测的其他可用关系很好地匹配，它使沉降量加倍。根据测试结果，讨论并推荐了临界值。
关键词 / Keywords
数值模拟；Plaxis 3D；弹性沉降；基础形状；施加荷载强度
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