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压实黏土梁弯曲开裂性状试验研究

凌道盛, 徐泽龙, 蔡武军, 王云岗

凌道盛, 徐泽龙, 蔡武军, 王云岗. 压实黏土梁弯曲开裂性状试验研究[J]. 岩土工程学报, 2015, 37(7): 1165-1172. DOI: 10.11779/CJGE201507001
引用本文: 凌道盛, 徐泽龙, 蔡武军, 王云岗. 压实黏土梁弯曲开裂性状试验研究[J]. 岩土工程学报, 2015, 37(7): 1165-1172. DOI: 10.11779/CJGE201507001
shu
LING Dao-sheng, XU Ze-long, CAI Wu-jun, WANG Yun-gang. Experimental study on characteristics of bending cracks of compacted soil beams[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(7): 1165-1172. DOI: 10.11779/CJGE201507001
Citation: LING Dao-sheng, XU Ze-long, CAI Wu-jun, WANG Yun-gang. Experimental study on characteristics of bending cracks of compacted soil beams[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(7): 1165-1172. DOI: 10.11779/CJGE201507001
shu

压实黏土梁弯曲开裂性状试验研究  English Version

  • 1. 浙江大学软弱土与环境土工教育部重点实验室,浙江 杭州 310058; 2. 浙江大学岩土工程研究所,浙江 杭州 310058; 3. 中国电建集团中南勘测设计研究院有限公司,湖南 长沙 410014; 4. 浙江大学城市学院,浙江 杭州 310015

基金项目: 国家重点基础研究发展计划（“973”计划）项目; （2014CB047000）; 浙江省自然科学基金面上项目（LY12E08011）; 国家自然科学基金项目（51278451）; 浙江省自然科学基金重点项目（LZ12E09001）
详细信息
    作者简介:

    凌道盛(1968- ),男,教授,主要从事土动力学、计算土力学方面的研究。E-mail: dsling@zju.edu.cn。

    通讯作者:

    王云岗

Experimental study on characteristics of bending cracks of compacted soil beams

  • 1. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310058, China; 2. Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China; 3. Zhongnan Engineering Corporation Limited, Changsha 410014, China; 4. City College, Zhejiang University, Hangzhou 310015, China

摘要

    摘要
  • 摘要: 裂缝的存在显著降低黏土层的防渗性能。研制了土梁弯曲试验装置,研究了不同含水率压实黏土梁张拉开裂性状,分析了裂纹扩展过程,并采用PIV技术揭示了裂纹尖端的应变局部化现象,获得了不同含水率下压实黏土的开裂应变。试验结果表明：三点弯梁拉伸区可能出现多个应变局部化区域,其中靠近跨中的一个发展为宏观裂纹;裂纹宽度随中点挠度近似呈线性增长,且受含水率影响较小;含水率对土梁开裂特性和开裂应变影响很大,随着含水率由32.6%增至37.0%,土梁断裂挠度显著增加,裂纹尖端的应变局部化区域变大,开裂应变从2.4%增大至4.1%,跨中荷载挠度曲线呈现由跳回型向跳过型变化,荷载峰值明显降低,土梁由脆性断裂逐渐转变为延性断裂。
    Abstract: The waterproofing properties of compacted clay barrier at landfill site will be significantly weakened by cracks. To reveal the characteristics of bending cracks of compacted soil beams with different water contents, a bending test apparatus is developed. Then the process of crack propagation is investigated. The strain localization near the crack tip is analyzed using PIV technology, and cracking strain of compacted soil beams with different water contents is obtained. The experimental results show that many strain localization regions are observed in the tensile zone of the beam, and the strain localization region near the mid-span becomes the macroscopic crack. The crack width increases linearly with the growth of mid-span displacement, which is independent of the water content. However, the water content has great influence on the cracking characteristics and strain of the beam. As the water content increases from 32.6% to 37.0%, the crack deflection of the beam increases markedly, the area of strain localization near the crack tip expands, and cracking strain increases from 2.4% to 4.1%. Additionally, as the water content increases, the pattern of load versus the mid-span displacement changes from “snap back” to “skip through”, and the peak load decreases noticeably. It is indicated that the crack pattern of compacted soil beams changes from brittle fracture to ductile one.
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    • 参考文献(17)
  • [1] GOURC J P, CAMP S, VISWANADHAM B V S, et al. Deformation behavior of clay cap barriers of hazardous waste containment systems: Full-scale and centrifuge tests[J]. Geotextiles and Geomembranes, 2010, 28(3): 281-291.
    [2] 清华大学土石坝抗裂小组. 黏性土抗拉特性的测量和对土石坝裂缝的初步研究[J]. 清华大学学报, 1973, 3: 61-71. (Research Group on Prevention against Cracking of Earth Dams. Measurement of tensile characteristics of cohesive soils and preliminary investigation on cracking of earth and rockfill dams[J]. Journal of Tsinghua University, 1973, 3: 61-71. (in Chinese))
    [3] 孙 萍, 彭建兵, 陈立伟, 等. 黄土拉张破裂特性试验研究[J]. 岩土工程学报, 2009, 31(6): 980-984. (SUN Ping, PENG Jian-bing, CHEN Li-wei, et al. Experimental research on tensile fracture characteristics of loess[J]. Chinese Journal of Geotechnical Engineering, 2009, 31(6): 980-984. (in Chinese))
    [4] 姚裕春, 姚令侃, 袁碧玉. 边坡开挖迁移式影响离心模型试验研究[J]. 岩土工程学报, 2006, 28(1): 76-80. (YAO Yu-chun, YAO Ling-kan, YUAN Bi-yu. Study of centrifuge model tests on transition effect of cut slopes[J]. Chinese Journal of Geotechnical Engineering, 2006, 28(1): 76-80. (in Chinese))
    [5] 曾国熙, 潘秋元, 胡一峰. 软黏土地基基坑开挖性状的研究[J]. 岩土工程学报, 1988, 10(3): 13-22. (ZENG Guo-xi, PAN Qiu-yuan, HU Yi-feng. The behavior of excavation in soft clay ground[J]. Chinese Journal of Geotechnical Engineering, 1988, 10(3): 13-22. (in Chinese))
    [6] 蔡武军, 凌道盛, 徐泽龙, 等. 单一裂隙优势渗流对黏土层防渗性能的影响分析[J]. 岩土力学, 2014, 35(10): 2838-2844. (CAI Wu-jun, LING Dao-sheng, XU Ze-long, et al. Influence of preferential flow induced by a single crack on anti-seepage performance of clay barrier[J]. Rock and Soil Mechanics, 2014, 35(10): 2838-2844. (in Chinese))
    [7] CAMP S, GOURC J P, PLE O. Landfill clay barrier subjected to cracking: Multi-scale analysis of bending tests[J]. Applied Clay Science, 2010, 48(3): 384-392.
    [8] VISWANADHAM B V S, JHA B K, PAWAR S N. Experimental study on flexural testing of compacted soil beams[J]. Journal of Materials in Civil Engineering, 2010, 22(5): 460-468.
    [9] 李 雷, 荣卫东. 几种击实土挠曲极限拉应变的试验研究[J]. 水利水运科学研究, 2000, 1: 43-48. (LI Lei, RONG Wei-dong. Experimental study on limit tensile strain under bending of compacted soil[J]. Journal of Nanjing Hydraulic Research Institute, 2000, 1: 43-48. (in Chinese))
    [10] 张 琰, 张丙印, 李广信, 等. 压实黏土拉压组合三轴试验和扩展邓肯张模型[J]. 岩土工程学报, 2010, 32(7): 999-1004. (ZHANG Yan, ZHANG Bing-yin, LI Guang-xin, et al. Combined tension-compression triaxial and extended Duncan-Chang model of compacted clay[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(7): 999-1004. (in Chinese))
    [11] 张 云, 王惠敏, 嫣丽芬. 击实黏土单轴拉伸特性试验研究[J]. 岩土力学, 2013, 34(8): 2151-2157. (ZHANG Yun, WANG Hui-min, YAN Li-fen. Test research on tensile properties of compacted clay[J]. Rock and Soil Mechanics, 2013, 34(8): 2151-2157. (in Chinese))
    [12] WHITE D J, TAKE W A, BOLTON M D. Soil deformation measurement using particle image velocimetry (PIV) and photogrammetry[J]. Géotechnique, 2003, 53(7): 619-631.
    [13] 张 嘎, 牟太平, 张建民. 基于图像分析的土坡离心模型试验变形场测量[J]. 岩土工程学报, 2007, 29(1): 94-97. (ZHANG Ga, MU Tai-ping, ZHANG Jian-min. Displacement measurement using image analysis in centrifuge modeling of slopes[J]. Chinese Journal of Geotechnical Engineering, 2007, 29(1): 94-97. (in Chinese))
    [14] 刘 君, 刘福海, 孔宪京, 等. PIV技术在大型振动台模型试验中的应用[J]. 岩土工程学报, 2010, 32(3): 368-374. (LIU Jun, LIU Fu-hai, KONG Xian-jing, et al. Application of PIV in large-scale shaking table model tests[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(3): 368-374. (in Chinese))
    [15] 张 敏, 吴宏伟. 颗粒图像测速技术在离心试验变形分析中的应用[J]. 岩石力学与工程学报, 2010, 29(增刊2): 3858-3864. (ZHANG Min, NG Charles W W. Application of particle image velocimetry to deformation analysis in centrifugal tests[J]. Chinese Journal of Rock Mechanics and Engineering, 2010, 29(S2): 3858-3864. (in Chinese))
    [16] 汤旅军, 陈仁朋, 尹鑫晟, 等. 密实砂土地层盾构隧道开挖面失稳离心模型试验研究[J]. 岩土工程学报, 2013, 35(10): 1830-1838. (TANG Lü-jun, CHEN Ren-peng, YIN Xin-sheng, et al. Centrifugal model tests on face stability of shield tunnels in dense sand[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(10): 1830-1838. (in Chinese))
    [17] WHITE D J. An investigation into the behavior of pressed-in piles[D]. Cambridge: University of Cambridge, 2002.
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出版历程
  • 收稿日期:  2014-04-21
  • 发布日期:  2015-07-19

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