基于三维非连续接触模型的管片接头静动力特性分析

艾辉军; 彭立敏; 施成华

基于三维非连续接触模型的管片接头静动力特性分析 English Version

艾辉军¹,
彭立敏^1,2,,
施成华^{1, 2}

1. 中南大学土木工程学院,湖南长沙 410075; 2.高速铁路建造技术国家工程实验室,湖南长沙 410075

基金项目: 国家重点基础研究发展计划（973计划）项目（2011CB013802）

详细信息

作者简介:
艾辉军(1989- )，男，湖南邵阳人，硕士，研究方向为隧道动力学、隧道及地下工程结构精细化模拟。E-mail: aihui_civil@163.com。

通讯作者:
彭立敏

中图分类号: TU47
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出版历程
- 收稿日期: 2013-04-09
- 发布日期: 2013-11-19

Static and dynamic characteristic analysis of segment joints based on three-dimensional discontinuous contact model

1. School of Civil Engineering, Central South University, Changsha 410075, China; 2. National Engineering Laboratory of High Speed Railway Construction, Changsha 410075, China

摘要

摘要: 基于非线性接触理论,考虑盾构隧道结构的非连续性,模拟管片接头结构和管片衬砌与围岩及道床之间的相互作用,建立了道床-管片-围岩的三维非连续接触模型,对盾构隧道管片接头在围岩静压、列车动载作用下的受力与变形进行了深入分析。研究结果表明,围岩静压下拱顶和隧底处的纵向接头部分向内张开,两侧拱腰处的接头部分向外张开,拱顶处的封顶块与邻接块错台较大,拱腰接头受压明显,拱顶接头受压最小,各环管片拱顶处的螺栓轴力最大,隧底处的其次,拱腰处的接头螺栓轴力最小,旋转了一定拼装角度后位于拱肩上部的接头螺栓,其剪力最大；列车动载作用下管片接头的张开错台、混凝土应力以及接头螺栓的内力均在动载施加初期迅速增加,然后明显减小,而后产生波动,其中浅埋地铁隧道拱顶接头的动力响应较隧底接头明显,螺栓剪力在列车动载作用下较螺栓轴力增加的多。
- 盾构隧道 /
- 管片接头 /
- 三维非连续接触模型 /
- 静动力分析
Abstract: Based on the nonlinear contact theory and considering the discontinuity of shield tunnel structure, a three- dimensional discontinuous contact model for track bed-segment-surrounding rocks is established by simulating the segment joints and the interaction between the segment and the surrounding rocks as well as the track bed. The mechanical and deformation properties of the segment joints under the pressure of the surrounding rocks and the action of the subway train dynamic load are analyzed in depth based on this model. The results of numerical simulations show that under the pressure of the surrounding rocks, some longitudinal joints in arch crown area and arch bottom open inwards; some joints in haunch of shield tunnel open outwards; and the dislocations between the completed blocks and the adjacent blocks in arch crown area are comparatively large. The joints in haunch are compressed obviously and those in arch crown have the minimum pressure under the pressure of the surrounding rocks. The axial forces of joint bolts in vault area are relatively the greatest, those in arch bottom come second, and those in haunch are the smallest. The shearing forces of joint bolts in the top of arch foots are also the greatest when segment ring rotates to an angle so as to complete assembly. The opens and dislocations of the segment joints, concrete stress and internal forces of joint bolts all increase rapidly at the beginning of the dynamic load, then significantly decrease, and finally are fluctuant under the action of dynamic load of subway trains. The dynamic response of joints in arch crown is more obvious than that in arch bottom for shallow buried metro tunnels. The shearing forces of joint bolts increase more than the axial forces under the action of dynamic load of subway trains.
- shield tunnel /
- segment joint /
- three-dimensional discontinuous contact model /
- static and dynamic analysis

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参考文献(12)

[1]	莫海鸿, 邓飞皇, 王军辉. 运营期地铁盾构隧道动力响应分析[J]. 岩石力学与工程学报, 2006, 25(增刊2): 2507-3512. (MO Hai-hong, DENG Fei-huang, WANG Jun-hui. Analysis of dynamic responses of shield tunnel during metro operation[J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25(S2): 2507-3512. (in Chinese))
[2]	刘建航, 侯学渊. 盾构法隧道[M]. 北京: 中国铁道出版社, 1991. (LIU Jian-hang, HOU Xue-yuan. Shield tunnel[M]. Beijing: China Railway Publishing House, 1991. (in Chinese))
[3]	朱合华, 陶履彬. 盾构隧道衬砌结构受力分析的梁-弹簧系统模型[J]. 岩土力学, 1998, 19(2): 26-32. (ZHU He-hua, TAO Lü-bin. Study on two beam-spring models for the numerical analysis of segments in shield tunnel[J]. Rock and Soil Mechanics, 1998, 19(2): 26-32. (in Chinese))
[4]	董新平. 极限荷载条件下盾构管片接头模型比较研究[J]. 岩土工程学报, 2013, 35(6): 1178-1182. (DONG Xin-ping. A benchmark analysis of the segment joint model for segmented tunnel lining in the ultimate limit state[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(6): 1178-1182. (in Chinese))
[5]	张冬梅, 樊振宇, 黄宏伟. 考虑接头力学特性的盾构隧道衬砌结构计算方法研究[J]. 岩土力学, 2010, 31(8): 2546-2552. (ZHANG Dong-mei, FAN Zhen-yu, HUANG Hong-wei. Calculation method of shield tunnel lining considering mechanical characteristics of joints[J]. Rock and Soil Mechanics, 2010, 31(8): 2546-2552. (in Chinese))
[6]	闫治国, 彭益成, 丁文其, 等. 青草沙水源地原水工程输水隧道单层衬砌管片接头荷载试验研究[J]. 岩土工程学报, 2011, 33(9): 1385-1390. (YAN Zhi-guo, PENG Yi-cheng, DING Wen-qi, et al. Load tests on segment joints of single lining structure of shield tunnel in Qingcaosha Water Conveyance Project[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(9): 1385-1390. (in Chinese))
[7]	闫治国, 丁文其, 沈碧伟, 等. 输水盾构隧道管片接头力学与变形模型研究[J]. 岩土工程学报, 2011, 33(8): 1185-1191. (YAN Zhi-guo, DING Wen-qi, SHEN Bi-wei, et al. Structural model for radial joints of water-conveyance shield tunnels[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(8): 1185-1191. (in Chinese))
[8]	陈俊生, 莫海鸿. 盾构隧道管片接头抗弯刚度的三维数值计算[J]. 铁道学报, 2009(4): 87-91. (CHEN Jun-sheng, MO Hai-hong. Three-dimensional FEM analysis on flexural rigidity of segment joints in shield tunnel[J]. Journal of the China Railway Society, 2009(4): 87-91. (in Chinese))
[9]	郭毅之, 金先龙, 丁俊宏, 等. 沉管隧道地震响应分析中的三维接触模型与算法研究[J]. 应用力学学报, 2006, 20(1): 48-52. (GUO Yi-zhi, JIN Xian-long, Ding Jun-hong, et al. Three-dimensional contact model and algorithm for earthquake response of immersed tunnel[J]. Chinese Journal of Applied Mechanics, 2006, 20(1): 48-52. ( in Chinese))
[10]	杨阜东. 高水压越江盾构隧道管片结构稳定性分析[D]. 济南: 山东大学, 2011. (YANG Fu-dong. Structural stability study for underwater shield-driven tunnel lining under high hydraulic pressure[D]. Ji'nan: Shandong University, 2011. (in Chinese))
[11]	赵武胜, 何先志, 陈卫忠, 等. 盾构隧道地震响应分析方法及工程应用[J]. 岩土力学, 2012, 33(8): 2415-2421. (ZHAO Wu-sheng, HE Xian-zhi, CHEN Wei-zhong, et al. Method for analyzing seismic response of shield tunnel and its application[J]. Rock and Soil Mechanics, 2012, 33(8): 2415-2421. (in Chinese))
[12]	梁波, 蔡英. 不平顺条件下高速铁路路基的动力分析[J]. 铁道学报, 1999, 21(2): 84-88. (LIANG Bo, CAI Ying. Dynamic analysis of subgrade of high speed railways in geometric irregular condition[J]. Journal of the China Railway Society, 1999, 21(2): 84-88. (in Chinese))