二向不等围压条件下考虑软化及剪胀的圆形隧洞弹塑性解

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Abstract Base on the elastoplastic softening model and non-associated flow rule，the lateral pressure coefficient，the included angle with the polar axis and principal stress corresponding relations under different engineering conditions are considered. Combine with the strain softening and dilatancy characteristic of rock after it comes into the yield stage，the analytical solutions of elastoplastic stress，displacement and plastic radius of the circular tunnel are deduced. The result of computation example shows that the lateral pressure coefficient and principal stress corresponding relations decide the distributing shape of plastic zone nearby the tunnel. Dilatancy has a much more important influence on the rock displacement nearby the tunnel than on the plastic radius. The influence of dilatancy extent to the deformation nearby the tunnel becomes larger when the strain softening characteristic of surrounding rock increases. In the project which is controlled by the displacement nearby the tunnel，the influence of strain softening and dilatancy can not be ignored.

Key words： tunnelling engineering circular tunnel lateral pressure coefficient strain softening dilatancy

Received: 29 December 2010

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[3]	FUENKAJORM K，SERATA S. Numerical simulation of strain- softening and dilation of rock salt[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1993，30(7)：1 303-1 306. " target="_blank">
[6]	张常光，张庆贺，赵均海. 考虑应变软化、剪胀和渗流的水工隧洞解析解[J]. 岩土工程学报，2009，31(12)：1 941-1 946.(ZHANG Changguang，ZHANG Qinghe，ZHAO Junhai. Analytical solutions of hydraulic tunnels considering strain softening，shear dilation and seepage[J]. Chinese Journal of Geotechnical Engineering，2009，31(12)：1 941-1 946.(in Chinese))
[17]	徐芝纶. 弹性力学[M]. 北京：高等教育出版社，1990：97-103.(XU Zhilun. Theory of elastic mechanics[M]. Beijing：Higher Education Press，1990：97-103.(in Chinese)) " target="_blank">
[1]	川本眺万. 岩体开挖的应变软化分析[C]// 土木学会论文集. [S. l.]：[s. n.]，1981：107-117.(TOSHIKAZU K. An analysis of excavation in strain-softening rock mass[C]// Proceedings of the Japan Society of Civil Engineers. [S.l.]：[s. n.]，1981：107-117. " target="_blank">
[16]	马念杰. 软化岩体中巷道围岩塑性区分析[J]. 阜新矿业学院学报：自然科学版，1995，14(4)：18-21.(MA Nianjie. A study of plastic zone around openings in the softening rock mass[J]. Journal of Fuxin Mining Institute：Natural Science，1995，14(4)：18-21.(in Chinese))
[9]	范文，俞茂宏，陈立伟. 考虑材料剪胀及软化的有压隧洞弹塑性分析的解析解[J]. 工程力学，2004，21(5)：16-24.(FAN Wen，YU Maohong，CHEN Liwei. An analytic solution of elasto-plastic pressure tunnel considering material softening and dilatancy[J]. Engineering Mechanics，2004，21(5)：16-24.(in Chinese))
[10]	蔡晓鸿，蔡勇平. 水工压力隧洞结构应力计算[M]. 北京：中国水利水电出版社，2004：71-90.(CAI Xiaohong，CAI Yongping. Structure stress calculation for hydraulic pressure tunnel[M]. Beijing：China Water Power Press，2004：71-90.(in Chinese)) " target="_blank">
[12]	陈立伟，彭建兵，范文，等. 基于统一强度理论的非均匀应力场圆形巷道围岩塑性区分析[J]. 煤炭学报，2007，32(1)：20-23.(CHEN Liwei，PENG Jianbing，FAN Wen，et al. Analysis of surrounding rock mass plastic zone of round tunnel under non-uniform stress field based on the unified strength theory[J]. Journal of China Coal Society，2007，32(1)：20-23.(in Chinese))
[13]	孙金山，卢文波. 非轴对称荷载下圆形隧洞围岩弹塑性分析解析解[J]. 岩土力学：2007，28(增)：327-332.(SUN Jinshan，LU Wenbo. Analytical elastoplastic solutions to supporting rock masses of circular tunnels under asymmetric load[J]. Rock and Soil Mechanics，2007，28(Supp.)：327-332.(in Chinese))
[2]	ZDENEK P，BAZANT F. Continuum theory for strain softening[J]. Journal of Engineering Mechanics，1984，110(12)：1 666-1 692. " target="_blank">
[4]	JENG F S，WENG M C，HUANG T H，et al. Deformational characteristics of weak sandstone and impact to tunnel deformation[J]. Tunnelling and Underground Space Technology，2002，17(3)：263-274. " target="_blank">
[5]	范鹏贤，王明洋，李文培. 岩土介质中圆形隧洞围岩压力理论分析进展[J]. 现代隧道技术，2010，47(2)：1-7.(FAN Pengxian，WANG Mingyang，LI Wenpei. Progress in theoretical analysis of ground response to circular excavations in rock and soil medium[J]. Modern Tunnelling Technology，2010，47(2)：1-7.(in Chinese))
[7]	蒋明镜，沈珠江. 考虑剪胀的线形软化柱形孔扩张问题[J]. 岩石力学与工程学报，1997，16(6)：550-557.(JIANG Mingjing，SHEN Zhujiang. On expansion of cylindrical cavity with linear softening and shear dilatation behavior[J]. Chinese Journal of Rock Mechanics and Engineering，1997，16(6)：550-557.(in Chinese))
[8]	王晓鸿，王家来，梁发云. 应变软化岩土材料内扩孔问题解析解[J]. 工程力学，1999，16(5)：71-76.(WANG Xiaohong，WANG Jialai，LIANG Fayun. Analytical solution to expansion of cavity in strain- softening materials[J]. Engineering Mechanics，1999，16(5)：71-76.(in Chinese))
[11]	孙广忠. 岩体结构力学[M]. 北京：科学出版社，1988：278-282.(SUN Guangzhong. Mechanics of rock mass structure[M]. Beijing：Science Press，1988：278-282.(in Chinese)) " target="_blank">
[14]	李忠华，潘一山. 有渗流作用的油井井壁稳定性分析[J]. 工程力学，2002，19(3)：105-108.(LI Zhonghua，PAN Yishan. Stability analysis of wellbore with permeation[J]. Engineering Mechanics，2002，19(3)：105-108.(in Chinese))
[15]	荣传新，程桦. 地下水渗流对巷道围岩稳定性影响的理论解[J]. 岩石力学与工程学报，2004，23(5)：741-744.(RONG Chuanxin，CHENG Hua. Stability analysis of rocks around tunnel with ground water permeation[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(5)：741-744.(in Chinese))