深埋隧道与浅埋隧道划分方法研究

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摘要隧道开挖后,围岩土体中的土压力拱效应显著地影响作用在隧道衬砌结构上的土压力。隧道结构设计时,界限埋深是确定围岩压力的基本参数之一。基于隧道开挖时围岩土体中附加荷载的特点,编制可以合理考虑土的应力路径相关性的弹塑性本构模型子程序,利用二次开发后的有限元分析软件ABAQUS对隧道开挖过程进行了三维有限元模拟。从围岩土体的变形规律和应力重分布两个方面分析了隧道开挖过程中的土压力拱效应,提出了深埋隧道与浅埋隧道的划分方法,即洞顶土体竖向位移达到稳定值时对应的埋深为界限埋深,当有支护结构与围岩土体相互作用时,洞顶上方地表处土体最大沉降对应的埋深作为界限埋深。通过与规范法确定的界限埋深比较,表明提出方法可较好地反映隧道开挖时围岩土体变形的宏观规律,并可考虑多种因素的定量影响。

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	张佩
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关键词 ：隧道开挖, 应力路径, 土压力拱效应, 界限埋深, 洞顶竖向位移

Abstract：The earth pressure applied on the lining is affected significantly by the soil arching effect during tunnel excavation. The critical depth becomes one of basic parameters to determine the pressure of the surrounding rock when designing the tunnel structure. Based on the additional load characteristics of the surrounding rock, a user-defined elastic-plastic material subroutine (UMAT) of the constitutive model considering complex stress path of soils is complied. Three-dimensional finite element analysis of tunnel excavation is carried out by means of the secondarily-developed ABAQUS with the UMAT. The soil arching effect is studied from two aspects: the deformation law of the surrounding rock and the stress path. According to the results, a new division method for deep and shallow tunnels is proposed, which can be illustrated by the critical depth. The critical depth is determined as the depth in accordance with the vertical displacement of ceiling becoming steady when there is no supporting structure, and the depth in accordance with the maximum settlement of the surface soil above the tunnel when supporting structures exist. Compared with the critical depth determined by the code, the proposed method can reflect the macroscopic deformation law of soils. Moreover, the quantitative impact of various factors is taken into account at the same time.

Key words： tunnel excavation stress path soil arching effect critical depth vertical displacement of ceiling

收稿日期: 2013-06-18

:	TU432
	U45

基金资助:国家自然科学基金项目（51278012）

作者简介: 张佩(1988- )，女，硕士研究生，主要从事地下工程等方面的研究。E-mail: zhangwenpei@email.bjut.edu.cn。

引用本文:

张佩, 路德春, 杜修力, 马超. 深埋隧道与浅埋隧道划分方法研究[J]. 岩土工程学报, 2013, 35(zk2): 422-427. ZHANG Pei, LU De-chun, DU Xiu-li, MA Chao. Division method for deep and shallow tunnels. Chinese J. Geot. Eng., 2013, 35(zk2): 422-427.

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http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/ 或 http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/Y2013/V35/Izk2/422

[1] THOMAS K, GUNTHER M. A numerical study of the effect of soil and grout material properties and cover depth in shield tunneling[J]. Computers and Geotechnics, 2006, 33: 234-247.
[2] 铁道第二勘察设计院. TB 10003—2005 铁路隧道设计规范[S]. 北京: 中国铁道出版社, 2005. (The Second Railway Survey and Design Institute. TB 10003—2005 Code for design of railway tunnel[S]. Beijing: China Railway Press, 2005. (in Chinese))
[3] JTG D70—2004公路隧道设计规范[S]. 北京: 人民交通出版社, 2004. (JTG D70—2004 Code for design of road tunnel[S]. Beijing: China Communications Press, 2004. (in Chinese))
[4] 朱正国. 连拱隧道围岩压力计算方法与动态施工力学行为研究[D]. 北京: 北京交通大学, 2007. (ZHU Zheng-guo. Research on surrounding rock pressure calculating method and dynamic construction mechanical behavior of multi-arch tunnel[D]. Beijing: Beijing Jiaotong University, 2007. (in Chinese))
[5] 宋玉香, 贾晓云, 朱永全. 地铁隧道竖向土压力荷载的计算研究[J]. 岩土力学, 2007, 28(10): 2240-2244. (SONG Yu-xiang, JIA Xiao-yun, ZHU Yong-quan. Study on vertical earth pressure calculation of metro tunnel[J]. Rock and Soil Mechanics, 2007, 28(10): 2240-2244. (in Chinese))
[6] TERZAGHI K. Theoretical soil mechanics[M]. New York: Wiley, 1943.
[7] 王明年, 郭军, 罗禄森, 等. 高速铁路大断面黄土隧道深浅埋分界深度研究[J]. 岩土力学, 2010, 31(4): 1157-1162. (WANG Ming-nian, GUO Jun, LUO Lu-sen, et al. Study of critical buried depth of large cross-section loess tunnel for high speed railway[J]. Rock and Soil Mechanics, 2010, 31(4): 1157-1162. (in Chinese))
[8] 杨建民, 喻渝, 谭忠盛, 等. 大断面深浅埋黄土隧道围岩压力试验研究[J]. 铁道工程学报, 2009, 125(2): 76-79. (YANG Jian-min, YU Yu, TAN Zhong-sheng, et al. Experimental research on the surrounding rock pressure of large sectional loess tunnel under deep and shallow submersion[J]. Journal of Railway Engineering Society, 2009, 125(2): 76-79. (in Chinese))
[9] 程小虎. 土质隧道深浅埋分界的理论解析[J]. 地下空间与工程学报, 2012, 8(1): 37-42. (CHENG Xiao-hu. Theoretical solution for the dividing depth of deep tunnel and shallow tunnel in earth[J]. Chinese Journal of Underground Space and Engineering, 2012, 8(1): 37-42. (in Chinese))
[10] YANG X L, HUANG F. Collapse mechanism of shallow tunnel based on nonlinear Hoek-Brown failure criterion[J]. Tunnelling and Underground Space Technology, 2011, 26: 686-691.
[11] FRALDI M, GUARRACINO F. Limit analysis of collapse mechanisms in cavities and tunnels according to the Hoek-Brown failure criterion[J]. International Journal of Rock Mechanics and Mining Sciences, 2009, 46(4): 665-673.
[12] 曲星, 李宁. 松散岩体竖向压力计算方法剖析及隧洞深浅埋划分方法研究[J]. 岩石力学与工程学报, 2011, 30(增刊1): 2749-2757. (QU Xing, LI Ning. Analysis of calculation method of vertical pressure in loose rock mass and research on dividing line standard for deep and shallow-buried tunnels[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(S1): 2749-2757. (in Chinese))
[13] 赵占厂, 谢永利. 土质隧道深浅埋界定方法研究[J]. 中国工程科学, 2005, 7(10): 84-86. (ZHAO Zhan-chang, XIE Yong-li. Research on demarcating method for deep tunnel and shallow tunnel in soil[J]. Engineering Science, 2005, 7(10): 84-86. (in Chinese))
[14] 毛峰. 黄土隧道深浅埋分界方法研究[D]. 西安: 西安理工大学, 2007. (MAO Feng. The dividing line standard research of deep submersed tunnel and shallow submersed tunnel of loess tunnel[D]. Xi'an: Xi'an University of Technology, 2007. (in Chinese))
[15] 喻波, 王呼佳. 压力拱理论及隧道埋深划分方法研究[M]. 北京: 中国铁道出版社, 2008. (YU Bo, WANG Hu-jia. Study on pressure arch theory and demarcating method for deep tunnel and shallow tunnel[M]. Beijing: China Railway Publishing House, 2008. (in Chinese))
[16] 郑颖人, 徐浩, 王成, 等. 隧洞破坏机理及深浅埋分界标准[J]. 浙江大学学报(工学版), 2010, 44(10): 1851 -1856. (ZHENG Ying-ren, XU Hao, WANG Cheng, et al. Failure mechanism of tunnel and dividing line standard between shallow and deep bury[J]. Journal of Zhejiang University (Engineering Science), 2010, 44(10): 1851-1856. (in Chinese))
[17] 路德春, 姚仰平. 砂土的应力路径本构模型[J]. 力学学报, 2005, 37(4): 451-459. (LU De-chun, YAO Yang-ping. Constitutive model of sand considering complex stress paths[J]. Chinese Journal of Theoretical and Applied Mechanics, 2005, 37(4): 451-459. (in Chinese))
[18] 路德春. 基于广义非线性强度理论的土的应力路径本构模型[D]. 北京: 北京航空航天大学, 2006. (LU De-chun. A constitutive model for soils considering complex stress paths based on the generalized nonlinear strength theory[D]. Beijing: Beihang University, 2006. (in Chinese))
[19] 路德春, 曹胜涛, 杜修力, 等. 平面应变条件下的土拱效应[J]. 岩土工程学报, 2011, 33(增刊1): 454-458. (LU De-chun, CAO Sheng-tao, DU Xiu-li, et al. Soil arching effect under plane strain condition[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(S1): 454-458. (in Chinese))