[1]林宇健,杨钧滔,吕艳平.平动位移模式下挡土墙后有限宽度无黏性填土主动土压力极限分析[J].水利与建筑工程学报,2019,(06):15-22.[doi:10.3969/j.issn.1672-1144.2019.06.003]
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平动位移模式下挡土墙后有限宽度无黏性填土主动土压力极限分析()
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《水利与建筑工程学报》[ISSN:1672-1144/CN:61-1404/TV]

卷:
期数:
2019年06期
页码:
15-22
栏目:
出版日期:
2019-12-30

文章信息/Info

作者:
林宇健杨钧滔吕艳平
福州大学,福建福州350116
关键词:
有限宽度填土主动土压力多楔体坍塌破坏DLO极限分析斜向微分土条单元极限平衡法
分类号:
TU432
DOI:
10.3969/j.issn.1672-1144.2019.06.003
摘要:
工程设计中,常常碰到挡土墙紧邻岩壁,墙后填土宽度受限的情况。由于不满足墙后半无限填土的基本假设,有限宽度填土破坏模式与半无限填土不同,墙后土压力分布形式与经典土压力理论也不一致。为准确分析有限宽度填土的受力特性,可以通过极限分析方法开展研究。研究发现有限宽度填土极限破坏时,土体内呈现多楔体坍塌破坏模式,坍塌区与岩壁相接触后产生另一簇滑动面发展至地面。减小墙后填土宽度,增大岩壁倾角,墙土摩擦角,有助于减小挡土墙所受主动土压力。为计算有限宽度填土主动土压力,根据有限宽度填土破坏模式,将坍塌区填土划分为无数与破坏滑动面相平行的斜向微分土条单元,采用极限平衡法建立了计算平动位移模式下有限宽度无黏性填土主动土压力的解析模型。计算结果与极限分析结果,已有理论方法和试验数据对比验证了其合理性,可以为挡土墙设计提供参考依据。

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备注/Memo

备注/Memo:
收稿日期:2019-08-22     修稿日期:2019-09-17基金项目:国家自然科学基金项目(41572253)作者简介:林宇健(1992—),男,福建福州人,博士研究生,研究方向为挡土结构土压力等岩土工程。E-mail:lvanna@fzu.edu.Cn
更新日期/Last Update: 2019-12-30