沉管隧道离心模型试验及数值模拟

岳夏冰; 谢永利; 张宏光; 胡指南

doi:10.13204/j.gyjz201306018

沉管隧道离心模型试验及数值模拟

doi: 10.13204/j.gyjz201306018

1.
长安大学公路学院,西安710064

基金项目:

国家科技支撑计划项目(2011BAG07B00);中央高校基金项目(CHD2012TD009)

详细信息

作者简介:
第一作者：岳夏冰, 女, 1987年出生, 博士研究生。电子信箱：yuexiabing7242453@163.com

中图分类号: U451.5
计量
- 文章访问数: 129
- HTML全文浏览量: 2
- PDF下载量: 89
- 被引次数: 0
出版历程
- 收稿日期: 2012-10-25
- 刊出日期: 2013-06-20

CENTRIFUGAL MODEL EXPERIMENT AND NUMERICAL SIMULATION OF IMMERSED TUBE TUNNEL

1.
College of Highway,Chang'an University,Xi'an 710064,China

摘要

摘要: 沉管隧道在开挖及回填过程中基底应力分布特征及其与沉管结构的变形特性分析在隧道工程中占重要地位。通过以港-珠-澳沉管隧道天然地基段某一横断面为研究对象，对整个施工过程进行不同垫层厚度的离心模型试验及有限元计算模拟，揭示沉管隧道天然地基开挖回弹及回填再压缩应力分布及变形特征、沉管结构的应变特征及垫层厚度对其影响，为沉管隧道的施工及地基处理方案设计提供参考。结果表明，开挖卸荷使基底产生拱形分布回弹。回填后基底应力呈马鞍形分布，仅中间部分应力随时间及回淤增加而增大；沉管底板应变呈马鞍形分布，工后应变量变化不大。垫层厚度变薄使基底应力分布匀化效果差，回填再压缩量及工后沉降量变大。
- 沉管隧道 /
- 离心模型试验 /
- 有限元计算 /
- 回弹再压缩
Abstract: Base stress distribution characteristics and the deformation characteristics of immersed tube tunnel in excavation and backfilling process of tunnel engineering occupy an important position.Taking one cross-section of the natural foundation in Hong Kong-Zhuhai-Macao immersed tube tunnel as research object, centrifugal model test and finite element simulation of the whole construction process with different cushion layer thickness were carried out.When excavation rebound and backfilling compression in the immersed tube tunnel, stress distribution and deformation characters of natural foundation, the strain characteristics of immersed tube structure and the influence of cushion layer thickness were revealed, which provided the design basis for the construction of immersed tube tunnel and scheme of ground treatment.The results showed that excavation unloading made basement produce arch distribution rebound.Basal stress distribution was the shape of a saddle after backfill, and only the stress in the middle of base was increasing with time and silting.The strain distribution of immersed tube plate was the shape of a saddle and strain had little change after construction.The thinning of the cushion layer thickness led to a poor smoothing effect on basal stress distribution, and recompression quantity and foundation settlement after construction become large.
- immersed tube tunnel /
- centrifugal model test /
- finite element simulation /
- rebound recompression

HTML全文

参考文献(14)

胡伟,胡明罡．等代刚架法计算深梁框架[J].工业建筑,2001,31(10):31－33.

[2] 王珉,李永和．无腹筋锈蚀钢筋混凝土深梁承载力分析[J].工业建筑,2006,36(S1):847－849.

[3] 薛萍,郑宏,陆路．几何参数变化对钢筋混凝土深梁滞回性能的影响[J].工业建筑,2009,39(7):41－43,102.

[4] Jones R M.Apparent Flexural Modulus and Strength of?Multimodulus Materials [J].Journal of Composite Materials,1976,10(4):342－354.

[5] 阿姆巴尔楚米扬 C A．不同模量弹性理论[M].邬瑞锋,张允真,译．北京:中国铁道出版社,1986.

[6] 姚文娟,叶志明．不同模量弯压柱的解析解[J].应用数学与力学,2004,25(9):901－909.

[7] 姚文娟,叶志明．不同模量横力弯曲梁的解析解[J].应用数学与力学,2004,25(10):1014－1022.

[8] He Xiaoting,Chen Shanlin,Sun Junyi.Applying the Equivalent?Section Method to Solve Beam Subjected Lateral Force and?Bending-Compression Column with Different Moduli [J].International Journal of Mechanical Sciences,2007,49(7):919－924.

[9] 张允真,王志锋．不同拉压模量弹性力学问题的有限元法[J].计算结构力学及其应用,1989,6(1):236－245.

[10] 叶志明,陈彤,姚文娟．不同模量弹性问题理论及有限元法研究进展[J].力学与实践,2004,26(2):9－14.

[11] Sun Junyi,Zhu Haiqiao.Qin Shihong,et al.A Review on the?Research of Mechanical Problems with Different Moduli in Tension?and Compression [J].Journal of Mechanical Science and?Technology,2010,24(9):1845－1854.

[12] 何晓婷,陈山林,孙俊贻．不同模量简支梁均布荷载下的弹性力学解[J].工程力学,2007,24(10):51－56.

[13] 刘相斌,张允真．拉压不同模量有限元法剪切弹性模量及加速收敛[J].大连理工大学学报,2000,40(5):527－530.

[14] He Xiaoting,Zheng Zhoulian,Sun Junyi,et al.Convergence?Analysis of a Finite Element Method Based on Different Moduli in?Tension and Compression [J].International Journal of Solids and?Structures,2009,46(20):3734－3740．

施引文献

资源附件(0)

访问统计