• 全国中文核心期刊
  • 中国科技核心期刊
  • 美国工程索引(EI)收录期刊
  • Scopus数据库收录期刊
CHEN Yong-gui, JIA Ling-yan, YE Wei-min, CUI Yu-jun, CHEN Bao, WANG Ju. Advances in hydro-mechanical behaviors of buffer materials under effect of technological gaps[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(1): 138-147. DOI: 10.11779/CJGE201701012
Citation: CHEN Yong-gui, JIA Ling-yan, YE Wei-min, CUI Yu-jun, CHEN Bao, WANG Ju. Advances in hydro-mechanical behaviors of buffer materials under effect of technological gaps[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(1): 138-147. DOI: 10.11779/CJGE201701012

Advances in hydro-mechanical behaviors of buffer materials under effect of technological gaps

More Information
  • Published Date: January 24, 2017
  • The self-sealing and self-healing behaviors of technological gaps in a high-level radioactive waste repository are analyzed. The systematical findings are summarized based on the previous studies on the effects of technological gaps on the swelling pressure, permeability, fracturing pressure and self-sealing properties. The results indicate that the presence of technological gaps strongly weakens the swelling potential and water tightness of buffer materials. At the early stage of a real repository development, hydraulic fracturing is likely to be induced along these interfaces under high water pressure. Generally available achievements in this area are quite limited. In the tests, the total average methods are employed to study the mean swelling pressure and permeability of buffer materials. However, the hydro-mechanical behaviors of bentonite within gaps cannot be characterized. Several testing devices are specially designed to monitor the total pressure along the interface, except that the effective swelling pressure and pore water pressure cannot be distinguished. These disadvantages result in great difficulties in mechanism analysis of sealing and healing behaviors of technological gaps. Finally, some suggestions are proposed for further researches.
  • [1]
    王 驹. 高放废物深地质处置: 回顾与展望[J]. 铀矿地质, 2009, 25(2): 71-77. (WANG Ju. Geological disposal of high level radioactive waste in China: review and prospect[J]. Uranium Geology, 2009, 25(2): 71-77. (in Chinese))
    [2]
    陈永贵, 黄润秋, 朱春明, 等. 化学场对膨润土水-力特性影响研究进展[J]. 同济大学学报(自然科学版), 2014, 42(3): 398-405. (CHEN Yong-gui, HUANG Run-qiu, ZHU Chun-ming, et al. Chemical environment effect on hydro-mechanical behavior of compacted bentonite[J]. Journal of Tongji University (Natural Science), 2014, 42(3): 398-405. (In Chinese))
    [3]
    PUSH R, RAMQVIST G, KASBOHM J, et al. The concept of highly radioactive waste (HLW) disposal in very deep boreholes in a new perspective[J]. Journal of Earth Sciences and Geotechnical Engineering, 2012, 2(3): 1-24.
    [4]
    PUSH R. The geological basis for developing concepts for disposal of highly radioactive waste (HLW) in crystalline rock - a state of art compilation[J]. Communicacoes Geologicás, 2012, 99(1): 61-68.
    [5]
    JOHANNESSON L E, BORGESSON L, GOUDARZI R, et al. Prototype repository: A full scale experiment at Äspö HRL[J]. Physics and Chemistry of the Earth, Parts A/B/C, 2007, 32(1): 58-76.
    [6]
    ALONSO E E, ALCOVERRO J, COSTE E, et al. The FEBEX benchmark test: case definition and comparison of modeling approaches[J]. International Journal of Rock Mechanics & Mining Sciences, 2005, 42(5): 611-638.
    [7]
    JUVANKOSKI M. Description of basic design for buffer[M]. Eurajoki: Posiva Oy, 2010.
    [8]
    MARTIN P L, BARCALA J M, HUERTAS F. Large-scale and long-term coupled thermo-hydro-mechanic experiments with bentonite: the FEBEX mock-up test[J]. Journal of Iberian Geology, 2006, 32(2): 259-282.
    [9]
    秦 冰, 陈正汉, 刘月妙, 等. 高庙子膨润土的胀缩变形特性及其影响因素研究[J]. 岩土工程学报, 2008, 30(7): 1005-1010. (QIN Bing, CHEN Zheng-han, LIU Yue-miao, et al. Swelling-shrinkage behavior of Gaomiaozi bentonite[J]. Chinese Journal of Geotechnical Engineering, 2008, 30(7): 1005-1010. (In Chinese))
    [10]
    WANG Q, TANG A M, CUI Y J, et al. Experimental study on the swelling behavior of bentonite/claystone mixture[J]. Engineering Geology, 2012, 124(1): 59-66.
    [11]
    VAUNAT J, GENS A. Analysis of the hydration of a bentonite seal in a deep radioactive waste repository[J]. Engineering Geology, 2005, 81(3): 317-328.
    [12]
    MARTIN P L, BARCALA J M. Large scale buffer material test: Mock-up experiment at CIEMAT[J]. Engineering Geology, 2005, 81(3): 298-316.
    [13]
    ALONSO E E, SPRINGMAN S M, NG C W W. Monitoring large-scale tests for nuclear waste disposal[J]. Geotechnical and Geological Engineering, 2009, 26(6): 205-214.
    [14]
    VILLAR M V, SANCHEZ M, GENS A. Behaviour of a bentonite barrier in the laboratory: Experimental results up to 8 years and numerical simulation[J]. Physics and Chemistry of the Earth, Parts A/B/C, 2014, 33(S1): 476-485.
    [15]
    KOMINE H N O. New equations for swelling characteristics of bentonite-based buffer materials[J]. Canadian Geotechnical Journal, 2003, 40(2): 460-475.
    [16]
    HOKMARK H. Hydration of the bentonite buffer in a KBS-3 repository[J]. Applied Clay Science, 2004, 26(1): 219-233.
    [17]
    WANG Q, TANG A M, CUI Y J, et al. The effects of technological voids on the hydro-mechanical behavior of compacted bentonite-sand mixture[J]. Soils and Foundations, 2013, 53(2): 232-245.
    [18]
    GRINDROD P, PELETIER M, TAKASE H. Mechanical interaction between swelling compacted clay and fractures rock, and the leaching of clay colloids[J]. Engineering Geology, 1999, 54(S1): 159-165.
    [19]
    GENS A, GUIMARAES L N, GARCIA-MOLINA A, et al. Factors controlling rock-clay buffer interaction in a radioactive waste repository[J]. Engineering Geology, 2002, 64(S2): 297-308.
    [20]
    BUZZI O, BOULON M, DELERUYELLE F, et al. Hydromechanical behavior of rock-bentonite interfaces under compression[J]. Rock Mechanics and Rock Engineering, 2008, 41(2): 343-371.
    [21]
    SABA S, CUI Y J, TANG A M, et al. Investigation of the swelling behavior of compacted bentonite/sand mixture by mock-up tests[J]. Canadian Geotechnical Journal, 2014, 51(12): 1399-1412.
    [22]
    CHEN Y G, CUI Y J, TANG A M, et al. A preliminary study on hydraulic resistance of bentonite/host-rock seal[J]. Géotechnique, 2014, 64(12): 997 - 1002.
    [23]
    TSANG C F, BARNICHON J D, BIRKHOLZER J, et al. Coupled thermo-hydro-mechanical processes in the near field of a high-level radioactive waste repository in clay formations[J]. International Journal of Rock Mechanics and Mining Sciences and Mining Sciences, 2012, 49(1): 31-44.
    [24]
    MARCIAL D, DELAGE P, CUI Y J. A laboratory study of the self sealing behavior of a compacted sand-bentonite mixture[J]. Geomechanics and Geoengineering: An International Journal, 2006, 1(1): 73-85.
    [25]
    TANG A M, MUNOZ J J, CUI Y J, et al. Experimental evaluation of the hydraulic resistance of compacted bentonite/boom clay interface[C]// International Conference: Underground Disposal Unit Design & Emplacement Processes for a Deep Geological Repository. Prague, 2008: 16-18.
    [26]
    陈 宝, 陈建琴, 曹永超. 接缝对高压实膨润土工程屏障自封闭性能的影响[J]. 岩石力学与工程学报, 2012, 31(3): 618-624. (CHEN Bao, CHEN Jian-qin, CAO Yong-chao. Influence of joint on self-sealing behavior of highly compacted bentonite in engineering barrier[J]. Chinese Journal of Rock Mechanics and Engineering, 2012, 31(3): 618-624. (In Chinese))
    [27]
    PUSH R. Swelling pressure of highly compacted bentonite[M]. Stockholm: Swedish Nuclear Fuel Supply Company, 1980.
    [28]
    KOMINE H, OGATA N. Predicting swelling characteristics of bentonites[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2004, 130(8): 818-829.
    [29]
    LLORET A, VILLAR M V. Advances on the knowledge of the thermo-hydro-mechanical behavior of heavily compacted “FEBEX” bentonite[J]. Physics and Chemistry of the Earth, Parts A/B/C, 2007, 32(8): 701-715.
    [30]
    SCHANZE T, Al-BADRAN Y. Swelling pressure characteristics of compacted Chinese Gaomiaozi bentonite GMZ01[J]. Soils and Foundations, 2014, 54(4): 748-759.
    [31]
    叶为民, SCHANZ T, 钱丽鑫, 等. 高压实高庙子膨润土GMZ01的膨胀力特征[J]. 岩石力学与工程学报, 2007, 26(增刊2): 3861-3865. (YE Wei-min, SCHANZ T, QIAN Li-xin, et al. Characteristics of swelling pressure of densely compacted Gaomiaozi bentonite GMZ01[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(S2): 3861-3865. (in Chinese))
    [32]
    CUI S L, ZHANG H Y, ZHANG M. Swelling characteristics of compacted GMZ bentonite-sand mixtures as a buffer/backfill material in China[J]. Engineering Geology, 2012, 141(3): 65-73.
    [33]
    YE W M, CHEN Y G, CHEN B, et al. Advances on the knowledge of the buffer/backfill properties of heavily-compacted GMZ bentonite[J]. Engineering Geology, 2010, 116(1): 12-20.
    [34]
    FUEL S N. Detailed programme for research and development 1999-2004[R]. Stockholm: Swedish Nuclear Fuel and Waste Management Co, 1998.
    [35]
    SABA S. Hydro-mechanical behavior of bentonite-sand mixture used as sealing materials in radioactive waste disposal galleries[D]. Paris: Ecole des Ponts ParissTech, 2014.
    [36]
    DIXON R, WOODHEAD A D, SOHLIMAN M. An investigation of the expectation gap in Egypt[J]. Managerial Auditing Journal, 2006, 21(3): 293-302.
    [37]
    FERRARI A, SEIPHOORI A, RUEDI J, et al. Shot-clay MX-80 bentonite: An assessment of the hydro-mechanical behavior[J]. Engineering Geology, 2014, 173: 10-18.
    [38]
    MARJAVAARA P, KIVIKOSKI H. Filling the gap between buffer and rock in the deposition hole[M]. Eurajoki: Posiva Oy, 2011.
    [39]
    STASTKA J. Development of bentonite gap filling for high-level waste disposal[C]// 22st International Conference Nuclear Energy for New Europe: Proceedings. Ljubljiana, 2013: 961-978.
    [40]
    CHEN L, LIU Y M, WANG J, et al. Investigation of the thermal-hydro-mechanical (THM) behavior of GMZ bentonite in the China-Mock-up test[J]. Engineering Geology, 2014, 172: 57-68.
    [41]
    温志坚. 中国高放废物处置库缓冲材料物理性能[J]. 岩石力学与工程学报, 2006, 25(4): 794-800. (WEN Zhi-jian. Physical property of China’s buffer material for high-level radioactive waste repository[J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25(4): 794-800. (In Chinese))
    [42]
    ZHU C M, YE W M, CHEN Y G, et al. Influence of salt solutions on the swelling pressure and hydraulic conductivity of compacted GMZ01 bentonite[J]. Engineering Geology, 2013, 166(8): 74-80.
    [43]
    YE W M, WAN M, CHEN B, et al. Temperature effects on the swelling pressure and saturated hydraulic conductivity of the compacted GMZ01 bentonite[J]. Enviromental Earth Sciences, 2013, 68(1): 281-288.
    [44]
    VILLAR M V, ROMERO E, LLORET A. Thermo-mechanical and geotechnical effects on the permeability of high-density clays[C]// Proceedings of the International Symposium on Large scale field tests in granite. Leiden, 2005: 177-191.
    [45]
    MITACHI T. Mechanical behavior of bentonite-sand mixtures as buffer materials[J]. Soils and Foundations, 2008, 48(3): 363-374.
    [46]
    VILLAR M V, LLORET A. Dismantling of the first section of the FEBEX in situ test: THM laboratory tests on the bentonite blocks retrieved[J]. Physics and Chemistry of the Earth, Parts A/B/C, 2007, 32(8): 716-729.
    [47]
    KOMINE H. Predicting hydraulic conductivity of sand-bentonite mixture backfill before and after swelling deformation for underground disposal of radioactive wastes[J]. Engineering Geology, 2010, 114(3): 123-134.
    [48]
    SUN De-an, ZHANG Jin-yi, ZHANG Jun-ran, et al. Swelling characteristics of GMZ bentonite and its mixtures with sand[J]. Applied Clay Science, 2013, 83(10): 224-230.
    [49]
    CHANDLER N, COUMUT A, DIXON D, et al. The tunnel sealing experiment: in-situ demonstration of technologies for vault sealing[C]// Proceedings of the 19th Annual Conference of the Canadian Nuclear Society. Toronto, 1998.
    [50]
    KOBAYASHI A, YAMAMOTO K, MOMOKI S. Characteristics of strength for hydraulic fracturing of buffer material[J]. Soils and Foundations, 2008, 48(4): 467-477.

Catalog

    Article views (398) PDF downloads (305) Cited by()
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return