地基固结和再固结过程中桩基础轴力与沉降计算方法

王睿; 曹威; 张建民

doi:10.11779/CJGE201503015

地基固结和再固结过程中桩基础轴力与沉降计算方法 English Version

1. 清华大学水沙科学与水利水电工程国家重点实验室,北京 100084; 2. 美国加利福尼亚大学洛杉矶分校土木与环境工程系,美国洛杉矶 90095

基金项目: 国家自然科学基金项目（51038007,51079074）

详细信息

作者简介:
王睿(1987- ),男,博士,主要从事岩土工程抗震方面研究。E-mail: wangrui_05@mail.thu.edu.cn。

中图分类号: TU473
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- 文章访问数: 410
- HTML全文浏览量: 2
- PDF下载量: 467
出版历程
- 收稿日期: 2014-07-15
- 发布日期: 2015-03-23

Method for calculating axial force and settlement of pile foundation in consolidating and reconsolidating ground

1. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China; 2 University of California, Department of Civil and Environmental Engineering, Los Angeles 90095, USA

摘要

摘要: 在地基固结和液化后再固结过程中,土体会对桩基础产生负摩阻力。负摩阻力作用下桩基础的轴力和沉降常采用中性面方法计算,但事实上中性面方法的几个基本假定可能导致计算结果相对实际产生显著偏差。针对地基固结和震后再固结过程中负摩阻力引起的桩基础的轴力和沉降进行研究,采用随固结过程更新桩土摩擦力峰值的非线性温克尔地基梁方法,建立相应计算方法。该方法能够充分考虑固结过程对桩基础轴力和最终沉降的影响,并给出轴力和沉降的变化过程。与离心模型试验对比的结果显示,在采用合理的固结计算方式的基础上,该方法能够有效地计算地基固结和震后再固结过程中桩基础的轴力与沉降,对沉降的计算精度高于传统中性面方法。
- 桩基础 /
- 固结 /
- 轴力 /
- 沉降 /
- 非线性温克尔地基梁
Abstract: The neutral plane solution has been widely used to estimate downdrag settlements and drag loads mobilized in piles in consolidating soil profiles. However, some of the basic assumptions made by the neutral plane solution may cause the calculated results to significantly deviate from the actual values. A beam on nonlinear Winkler foundation (BNWF) solution, in which the shaft friction capacity is updated as consolidation progresses proportional to the effective stress, is proposed to analyze the axial force and settlement of piles during consolidation and post-earthquake reconsolidation. The proposed method fully considers the effect of consolidation process on the axial force and final settlement of piles. The axial force and downdrag settlement by the proposed BNWF solution is compared with the measured ones from centrifuge tests on piles in both consolidating and reconsolidating ground. The proposed method produces more accurate estimates of pile settlement than the traditional neutral plane solution.
- pile foundation /
- consolidation /
- axial force /
- settlement /
- BNWF

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参考文献(26)

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文章访问数: 410
HTML全文浏览量: 2
PDF下载量: 467
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地基固结和再固结过程中桩基础轴力与沉降计算方法 English Version

作者简介: 王 睿(1987- ),男,博士,主要从事岩土工程抗震方面研究。E-mail: wangrui_05@mail.thu.edu.cn。

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出版历程

Method for calculating axial force and settlement of pile foundation in consolidating and reconsolidating ground

计量

出版历程

目录

作者简介:
王睿(1987- ),男,博士,主要从事岩土工程抗震方面研究。E-mail: wangrui_05@mail.thu.edu.cn。