ANALYSIS OF FLUID FLOW THROUGH ROUGH JOINTS BASED ON A SHEAR DILATION MODEL DEVELOPED BY BARTON
XIAO Weimin1，2，XIA Caichu1，WANG Wei3，BIAN Yuewei1
(1. Department of Geotechnical Engineering，Tongji University，Shanghai 200092，China；2. Department of Geotechnical Engineering，Southwest Jiaotong University，Chengdu，Sichuan 610031，China；3. Construction Safety and
Quality Supervision Station，Minhang Sub-station，Shanghai 201100，China)
Abstract：In order to investigate fluid flow through a rough joint during shearing，shear dilation of a rough joint is firstly analyzed by using the shear dilation model developed by Barton，and then dilations under different shear displacements can be calculated. The Brown-Scholz(B-S) theoretical model is employed to compute the closures of joint under different levels of normal stress. The relation of the aperture during shearing with normal stress and shear displacement are established according to the relations among initial aperture，normal closure and shear dilation，on the basis of which a new equation accounting for the volumetric rates through a rough joint during shearing is derived. Then laboratory flow tests on rock joint specimens are carried out；and the new equation derived from the shear dilation model developed by Barton and Barton?s empirical equation are adopted to predict flow rates through joint specimens. Comparisons between theoretical predictions and experimental results are conducted. From the comparisons，it is shown that predictions of the new equation agree well with experimental results while the results of Barton?s empirical equation deviate from experimental results to a large extent，which verifies the validity of the new equation for predicting fluid flow through a rough joint during shearing.
肖维民1，2，夏才初1，王 伟3，卞跃威1. 基于Barton剪胀模型的粗糙节理渗流分析[J]. 岩石力学与工程学报, 2013, 32(4): 814-820.
XIAO Weimin1，2，XIA Caichu1，WANG Wei3，BIAN Yuewei1. ANALYSIS OF FLUID FLOW THROUGH ROUGH JOINTS BASED ON A SHEAR DILATION MODEL DEVELOPED BY BARTON. , 2013, 32(4): 814-820.
[1] YEO I W，DE FREITAS M H，ZIMMERMAN R W. Effect of shear displacement on the aperture and permeability of a rock fracture[J]. International Journal of Rock Mechanics and Mining Sciences，1998，35(8)：1 051–1 070.
[2] MATSUKI K，KIMURA Y，SAKAGUCHI K，et al. Effect of shear displacement on the hydraulic conductivity of a fracture[J]. International Journal of Rock Mechanics and Mining Sciences，2010，47(3)：436–449.
[3] ESAKI T，DU S J，MITANI Y，et al. Development of a shear-flow test apparatus and determination of coupled properties for a single rock joint[J]. International Journal of Rock Mechanics and Mining Sciences，1999，36(5)：641–650.
[4] CHIBA S，OHNISHI Y，OHTSU H，et al. The development of new apparatus considering the effect of shear deformation on hydraulic characteristics of a single joint[C]// Environmental Rock Engineering. [S. l.]：[s. n.]，2003：93–100.
[5] KOYAMA T. Stress，flow and particle transport in rock fractures[Ph. D. Thesis][D]. Stockholm，Sweden：Royal Institute of Technology，2007.
[6] JIANG Y，XIAO J，TANABASHI Y，et al. Development of an automated servo-controlled direct shear apparatus applying a constant normal stiffness condition[J]. International Journal of Rock Mechanics and Mining Sciences，2004，41(2)：275–286.
[7] LI B. Coupled shear-flow and deformation properties of fractured rock mass[Ph. D. Thesis][D]. Nagasaki：Nagasaki University，2009.
[8] 王 刚. 节理剪切渗流耦合特性及加锚节理岩体计算方法研究[博士学位论文][D]. 济南：山东大学，2008.(WANG Gang. Study on hydro-mechanical behavior of rock joints and computation method of bolted jointed rock mass[Ph. D. thesis][D]. Jinan：Shandong University，2008.(in Chinese))
[9] SNOW D T. Anisotropic permeability of fractured media[J]. Water Resources Research，1969，5(6)：1 273–1 289.
[10] SIMON R. Analysis of fault-slip mechanisms in hard rock mining[Ph. D. Thesis][D]. Montreal：McGill University，1999.
[11] BARTON N，BANDIS S，BAKTHAR K. Strength，deformation and conductivity coupling of rock joints[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1985，22(3)：121–140.
[12] BARTON N，CHOUBEY V. The shear strength of rock joints in theory and practice[J]. Rock Mechanics and Rock Engineering，1977，10(1/2)：1–54.
[13] ASADOLLAHI P，TONON F. Constitutive model for rock fractures：revisiting Barton?s empirical model[J]. Engineering Geology，2010，113(1/4)：11–32.
[14] BARTON N. Modelling rock joint behavior from in situ block test： implications for nuclear waste repository design[C]// Office of Nuclear Waste Isolation. [S. l.]：[s. n.]，1982：96.
[15] OLSSON R，BARTON N. An improved model for hydromechanical coupling during shearing of rock joints[J]. International Journal of Rock Mechanics and Mining Sciences，2001，38(3)：317–329.
[16] 王 伟. 不同接触状态下节理应力–渗流耦合特性研究[博士学位论文][D]. 上海：同济大学，2009.(WANG Wei. Study on coupled characteristic for stress and seepage of rock joints under different contact conditions[Ph. D. Thesis][D]. Shanghai：Tongji University，2009.(in Chinese))
[17] BROWN S R，SCHOLZ C H. Closure of random elastic surfaces in contact[J]. Journal of Geophysical Research，1985，79(B7)：5 531–5 545.
[18] TSE R，CRUDEN D M. Estimating joint roughness coefficient[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1979，16(5)：303–307.
[19] HSIUNG S M，GHOST A，AHOLA M P，et al. Assessment of conventional methodologies for joint roughness coefficient determination[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1993，30(7)：825–829.
[20] YOSHIOKA N. Elastic behavior of contacting surfaces under normal loads：a computer simulation using three-dimensional surfaces topographies[J]. Journal of Geophysical Research，1994，99(8)：15 549–15 560.
[21] BROWN S R. Fluid flow through rock joints：the effect of surface roughness[J]. Journal of Geophysical Research，1987，92(B2)：1 337–1 347.
[22] 肖维民，夏才初，卞跃威，等. 考虑接触面积影响的粗糙节理渗流分析[J]. 岩土力学，待刊.(XIAO Weimin，XIA Caichu，BIAN Yuewei，et al. Study on calculation of fluid flow through a rough joint by considering the effect of contact area[J]. Rock and Soil Mechanics，to be pressed.(in Chinese))
[23] XIONG X B，LI B，JIANG Y J，et al. Experimental and numerical study of the geometrical and hydraulic characteristics of a single rock fracture during shear[J]. International Journal of Rock Mechanics and Mining Sciences，2011，48(8)：1 292–1 302.
[24] 夏才初，王 伟，丁增志. TJXW–3D型便携式岩石三维表面形貌仪的研制[J]. 岩石力学与工程学报，2008，27(7)：1 505–1 512.(XIA Caichu，WANG Wei，DING Zengzhi. Development of three-dimensional TJXW–3D-typed portable rock surface topography scanner[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(7)：1 505– 1 512.(in Chinese))
2013, Vol. 32 
