岩石隧道塑性位移新解

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (0 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Based on the unified strength theory and the elastic-brittle-plastic model，the new plastic solution for displacement of deep circular tunnels in rock is deduced. The influence of the elastic modulus variation in the plastic zone，intermediate principal stress，rock softening and shear dilation is all involved in this new formula. The new displacement solution obtained in this paper has a broadly theoretical meaning. More reasonable choices could be made according to the actual engineering situations. By analyzing an engineering case，the tunnel displacement calculated with the radius-dependent Young?s modulus is between the upper and lower bounds，which reflects the distance changes of the tunnel excavation unloading affect and is more consistent with the true situation of tunnel deformation. The effects of the unified strength theory parameter and shear dilation characteristic parameter on the tunnel displacement in the plastic zone are discussed. It is shown that the intermediate principal stress，shear dilation and the elastic modulus in the plastic zone have a significant effect on the tunnel plastic displacement，in which these three aspects influence each other and work together.

Key words： tunnelling engineering unified strength theory radius-dependent elastic modulus shear dilation

Received: 20 January 2010

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors

Cite this article:

URL:

https://rockmech.whrsm.ac.cn/EN/Y2011/V30/IS2/3551

[1] 蒋明镜，沈珠江. 岩土类软化材料的柱形孔扩张统一解问题[J]. 岩土力学，1996，17(1)：1–8.(JIANG Mingjing，SHEN Zhujiang. Unified solution of expansion of cylindrical cavity for geometries with strain softening behaviour[J]. Rock and Soil Mechanics，1996，17(1)：1–8.(in Chinese)) [2] JAEGER J C，COOK N G W. Fundamentals of rock mechanics[M]. London：Methuen and Co. Ltd.，1979：257–260. [3] BROWN E T，BRAY J W，LADANYI B，et al. Ground response curves for rock tunnels[J]. Journal of Geotechnical Engineering，ASCE，1983，109(1)：15–39. [4] WANG Y. Ground response of circular tunnel in poorly consolidated rock[J]. Journal of Geotechnical Engineering，ASCE，1996，122(9)：703–708. [5] SHARAN S K. Analytical solutions for stresses and displacements around a circular opening in a generalized Hoek-Brown rock[J]. International Journal of Rock Mechanics and Mining Sciences，2008，45(1)：78–85. [6] EWY R T，COOK N G W. Deformation and fracture around cylindrical openings in rock—I. Observations and analysis of deformations[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1990，27(5)：387–407. [7] NAWROCKI P A，DUSSEAULT M B. Modelling of damaged zones around openings using radius-dependent Young?s modulus[J]. Rock Mechanics and Rock Engineering，1995，28(4)：227–239. [8] 宋义敏，王振武. 深埋洞室围岩破坏区域碎裂化的非均匀弹性分析[J]. 北华航天工业学院学报，2008，18(2)：1–4.(SONG Yimin，WANG Zhenwu. Mechanics study on zonal disintegration of deep rock mass[J]. Journal of North China Institute of Aerospace Engineering，2008，18(2)：1–4.(in Chinese)) [9] 俞茂宏. 双剪理论及其应用[M]. 北京：科学出版社，1998：247–288.(YU Maohong. Twin-shear theory and its application[M]. Beijing：Science Press，1998：247–288.(in Chinese)) [10] 俞茂宏. 岩土类材料的统一强度理论及其应用[J]. 岩土工程学报，1994，16(2)：1–10.(YU Maohong. Unified strength theory for geomaterials and its applications[J]. Chinese Journal of Geotechnical Engineering，1994，16(2)：1–10.(in Chinese)) [11] 曹黎娟，赵均海，魏雪英. 基于统一强度理论的灰土挤密桩应力分析[J]. 岩土力学，2006，27(10)：1 986–1 990.(CAO Lijuan，ZHAO Junhai，WEI Xueying. Stress analysis of lime-soil compacted pile based on the unified strength theory[J]. Rock and Soil Mechanics，2006，27(10)：1 986–1 990.(in Chinese)) [12] 杨青顺，魏雪英，赵均海. 钢钎维混凝土方形板的冲切强度统一解[J]. 工程力学，2008，25(9)：176–179.(YANG Qingshun，WEI Xueying，ZHAO Junhai. Unified solutions of ultimate punching shear strength of square fiber concrete slabs[J]. Engineering Mechanics，2008，25(9)：176–179.(in Chinese)) [13] 张常光，张庆贺，赵均海. 考虑应变软化及剪胀的井壁稳定统一解[J]. 煤炭学报，2009，34(5)：634–639.(ZHANG Changguang，ZHANG Qinghe，ZHAO Junhai. Unified solutions of well-bore stability considering strain softening and shear dilation[J]. Journal of China Coal Society，2009，34(5)：634–639.(in Chinese)) [14] 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)) [15] HOEK E，BROWN E T. Practical estimates of rock mass strength[J]. International Journal of Rock Mechanics and Mining Sciences，1997，34(8)：1 165–1 186. [16] Rocscience Inc.. RocLab[EB/OL]. [2009]. http：//www.rocscience.com