基于Pasternak地基的盾构隧道开挖非连续地下管线的挠曲

林存刚; 黄茂松

doi:10.11779/CJGE201907003

基于Pasternak地基的盾构隧道开挖非连续地下管线的挠曲 English Version

林存刚^1,2,
黄茂松^1,2, ,

1. 同济大学地下建筑与工程系,上海200092;
2. 同济大学岩土及地下工程教育部重点实验室,上海 200092

基金项目: 国家重点研发计划项目（2016YFC0800200）; 国家自然科学基金项目（51738010,41702313）; 宁波市自然科学基金项目（2016A610090）

详细信息

作者简介:
林存刚(1986— ),男,博士,主要从事盾构隧道环境效应及服役性状的研究工作。E-mail: cunganglin@163.com。

通讯作者:
黄茂松，E-mail：mshuang@tongji.edu.cn

中图分类号: TU470;TD853.34
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- 文章访问数: 310
- HTML全文浏览量: 3
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出版历程
- 收稿日期: 2018-08-27
- 发布日期: 2019-07-24

Deflections of discontinuous buried pipelines induced by shield tunnelling based on Pasternak foundation

LIN Cun-gang^1,2,
HUANG Mao-song^1,2, ,

1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;
2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China

摘要

摘要: 盾构隧道开挖引起地下管线挠曲的准确预估对于其损伤评估与防护控制至关重要。引入Pasternak地基模型,采用有限差分方法推导了盾构隧道开挖地层损失下带接头管线的挠曲解答。经与离心机模型试验结果及连续弹性解对比,验证了该理论解答的适用性及其在运算效率方面的优势,并给出了地基剪切刚度的取值建议。参数分析发现,接头刚度会对管线挠曲产生显著影响,随接头刚度的增大,管线最大挠度降低,挠曲线形态趋近于连续管线;此外,接头数量及其分布也会对管线挠曲产生影响,其影响程度随接头数量的增大而削弱。
- 盾构隧道开挖 /
- 地层损失 /
- 带接头管线 /
- 挠曲 /
- 有限差分法 /
- Pasternak地基
Abstract: An accurate prediction of deflections of the buried pipelines induced by shield tunnelling is essential to their damage evaluation and control. By introducing the Pasternak foundation model, the finite difference method is used to deduce a solution to the deflections of jointed pipelines subject to shield tunnelling-induced ground loss. The applicability of this solution and its advantage in computational efficiency are verified by the results of a centrifuge model test and the elastic-continuum solution. Furthermore, a proposal is made for determination of the value of the subgrade shear stiffness. Afterwards, the parametric studies show that the deflection of the pipeline is significantly influenced by the stiffness of the joints. With the increase of their stiffness, the maximum deflection of the pipeline decreases, and the deflection of a jointed pipeline approaches to that of a continuous one. In addition, the deflection of the pipeline is affected by the amount and distribution of the joints to some extent. However, this effect decreases with an increase of the number of the joints.
- shield tunnelling /
- ground loss /
- jointed pipeline /
- deflection /
- finite difference method /
- Pasternak foundation

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参考文献(23)

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