Experimental research on visible seepage of sandstone fissure using digital image-based method

LIU Jie; TANG Hong-yu; YANG Yu-nan; SHI Qian; LI Zheng; LI Zhao; GAO Jin; LAN Jun

doi:10.11779/CJGE202011007

Volume 42 Issue 11

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Chinese Journal of Geotechnical Engineering > 2020 > 42(11): 2024-2033. > DOI: 10.11779/CJGE202011007

LIU Jie, TANG Hong-yu, YANG Yu-nan, SHI Qian, LI Zheng, LI Zhao, GAO Jin, LAN Jun. Experimental research on visible seepage of sandstone fissure using digital image-based method[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(11): 2024-2033. DOI: 10.11779/CJGE202011007

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Experimental research on visible seepage of sandstone fissure using digital image-based method

LIU Jie^{1, 2,},
TANG Hong-yu^{1, 2},
YANG Yu-nan^{1, 2, ,},
SHI Qian^{1, 2},
LI Zheng^{1, 2},
LI Zhao^{1, 2},
GAO Jin^{1, 2},
LAN Jun³

1.
Engineering Technology Center for Geological Disaster Prevention of Hubei Province, Yichang 443002, China
2.
Key Laboratory of Geological Hazards in Three Gorges Reservoir Area, Ministry of Education, Yichang 443002, China
3.
Wuhan Tianhua Huazhong Architectural Design Co., Ltd., Wuhan 430021, China

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Received Date: March 08, 2020
Available Online: December 05, 2022

Graphical Abstract

Abstract

Abstract

The visual fracture seepage test devices independently developed apply the color tracer image digital processing technology to carry out the visual seepage tests on the sandstone fractures with vertical spatial angle under the coupling effects of loading and unloading with different osmotic pressure and normal stress gradations. By means of the millisecond frame division technology, the seepage state of the crack is captured and the color domain of the seepage area is partitioned. Based on the digital image technology, the binary processing is carried out. The parameters of the seepage area are identified by double overlay of layers, and the diffusion law of the seepage area under the action of osmotic pressure and normal stress is established. The characteristics of the change of the flow width of each section along the dominant seepage path of the fracture are studied, and the formula for calculating the visual seepage velocity is put forward. It is pointed out that the seepage velocity changes along the flow diameter into three stages: sudden increase, sudden decrease and uniform loss. A functional model for the peak velocity corresponding to the minimum section width is established under the coupling action of osmotic pressure and normal stress. Based on the measured data of the main seepage path, the power function for the stress normal, osmotic pressure and Reynolds number is established, the change point of seepage state in the inertia function area and viscous effect area is calibrated, and the prediction model for Reynolds number of visualized fissure flows is formulated. The new theories and research method for the key scientific issues such as identification of real seepage in fissure seepage path, real-time change of velocity vector and determination of fluid state are put forward.
- visualized seepage,
- digital image processing,
- seepage diffusion area,
- cross section width,
- seepage velocity,
- Reynolds number

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References (18)

References

[1]	LOUIS C. Rock Hydraulics in Rock Mechanics[M]. New York: Springer-Verlag, 1974.
[2]	速宝玉, 詹美礼, 赵坚. 仿天然岩体裂隙渗流的试验研究[J]. 岩土工程学报, 1995, 17(5): 19-24. doi: 10.3321/j.issn:1000-4548.1995.05.004 SU Bao-yu, ZHAN Mei-li, ZHAO Jian. Study on fracture seepage in the imitative nature rock[J]. Chinese Journal of Geotechnical Engineering, 1995, 17(5): 19-24. (in Chinese) doi: 10.3321/j.issn:1000-4548.1995.05.004
[3]	许光祥, 张永兴, 哈秋舲. 粗糙裂隙渗流的超立方和次立方定律及其试验研究[J]. 水利学报, 2003, 34(3): 74-79. doi: 10.3321/j.issn:0559-9350.2003.03.014 XU Guang-xiang, ZHANG Yong-xing, HA Qiu-ling. Super- cubic and sub-cubic law of rough fracture seepage and its experimental study[J]. Journal of Hydraulic Engineering, 2003, 34(3): 74-79. (in Chinese) doi: 10.3321/j.issn:0559-9350.2003.03.014
[4]	SINGH K K, SINGH D N, RANJITH P G. Laboratory simulation of flow through single fractured granite[J]. Rock Mechanics and Rock Engineering, 2015, 48(3): 987-1000. doi: 10.1007/s00603-014-0630-9
[5]	BABADAGLI T, REN X, DEVELI K. Effects of fractal surface roughness and lithology on single and multiphase flow in a single fracture:an experimental investigation[J]. International Journal of Multiphase Flow, 2015, 68: 40-58. doi: 10.1016/j.ijmultiphaseflow.2014.10.004
[6]	BRUSH D J, THOMSON N R. Fluid flow in synthetic roughwalled fractures:Navier-Stokes, Stokes, and local cubic law simulations[J]. Water Resources Research, 2003, 39(4): 1085-1100.
[7]	OLSSON R, BARTON N. An improved model for hydro mechanical coupling during shearing of rock joints[J]. International Journal of Rock Mechanics and Mining Sciences, 2001, 38(3): 317-329. doi: 10.1016/S1365-1609(00)00079-4
[8]	胡昱, 源新, 刘光廷, 等. 多轴应力作用下砂砾岩单裂隙渗流规律试验研究[J]. 地下空间与工程学报, 2007, 3(6): 1009-1013. doi: 10.3969/j.issn.1673-0836.2007.06.006 HU Yu, YUAN Xin, LIU Guang-ting, et al. Experiment research on the laws of seepage in calcirudite rock within single fracture under multiaxial stresses[J]. Chinese Journal of Underground Space and Engineering, 2007, 3(6): 1009-1013. (in Chinese) doi: 10.3969/j.issn.1673-0836.2007.06.006
[9]	刘才华, 陈从新. 三轴应力作用下岩石单裂隙的渗流特性[J]. 自然科学进展, 2007, 17(7): 989-994. doi: 10.3321/j.issn:1002-008X.2007.07.022 LIU Cai-hua, CHEN Cong-xin. Seepage characteristics of single fracture under triaxial stress[J]. Advances in Natural Science, 2007, 17(7): 989-994. (in Chinese) doi: 10.3321/j.issn:1002-008X.2007.07.022
[10]	王志良, 申林方, 徐则民, 等. 岩体裂隙面粗糙度对其渗流特性的影响研究[J]. 岩土工程学报, 2016, 38(7): 1262-1268. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201607013.htm WANG Zhi-liang, SHEN Lin-fang, XU Ze-min, et al. Influence of roughness of rock fracture on seepage characteristics[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(7): 1262-1268. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201607013.htm
[11]	QIAN J, ZHAN H, LUO S, et al. Experimental evidence of scale-dependent hydraulic conductivity for fully developed turbulent flow in a single fracture[J]. Journal of Hydrology, 2007, 339(3/4): 206-215.
[12]	RANJITH P G, DARLINGTON W. Nonlinear single-phase flow in real rock joints[J]. Water Resources Research, 2007, 43(9): 146-156.
[13]	ZHANG Z, NEMCIK J. Fluid flow regimes and nonlinear flow characteristics in deformable rock fractures[J]. Journal of Hydrology, 2013, 477(16): 139-151.
[14]	胡少华, 周佳庆, 陈益峰, 等. 岩石粗糙裂隙非线性渗流特性试验研究[J]. 地下空间与工程学报, 2017, 13(1): 48-56. https://www.cnki.com.cn/Article/CJFDTOTAL-BASE201701008.htm HU Shao-hua, ZHOU Jia-qing, CHEN Yi-feng, et al. Laboratory research on nonlinear flow behavior of rough fractures[J]. Chinese Journal of Underground Space and Engineering, 2017, 13(1): 48-56. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-BASE201701008.htm
[15]	鞠杨, 谢和平, 郑泽民, 等. 基于3D打印技术的岩体复杂结构与应力场的可视化方法[J]. 科学通报, 2014, 59(32): 3109-3119. https://www.cnki.com.cn/Article/CJFDTOTAL-KXTB201432002.htm JU Yang, XIE He-ping, ZHENG Ze-ming, et al. Visualization of the complex structure and stress field inside rock by means of 3D printing technology[J]. Chinese Science Bull, 2014, 59(32): 3109-3119. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-KXTB201432002.htm
[16]	刘建军, 汪尧, 宋睿, 等. 基于透明岩土材料的可视化渗流实验及其应用前景[J]. 地球科学, 2017, 42(8): 1287-1295. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX201708004.htm LIU Jian-jun, WANG Yao, SONG Rui, et al. Visual seepage experiment based on transparent rock-soil material and its application prospect[J]. Earth Science, 2017, 42(8): 1287-1295. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX201708004.htm
[17]	盛金昌, 刘继山, 赵坚. 基于图像数字化技术的裂隙岩体非稳态渗流分析[J]. 岩石力学与工程学报, 2006, 25(7): 1402-1407. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX200607015.htm SHENG Jin-chang, LIU Ji-shan, ZHAO Jian. Analysis of transient fluid flow in fractured rock masses with digital image-based method[J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25(7): 1402-1407. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX200607015.htm
[18]	FOXRW , MCDONALD A T, PRITCHARD P J. Introduction to Fluid Mechanics[M]. 6th ed. Hoboken: John Wiley and Sons, 2004: 348.