• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus 收录
  • 全国中文核心期刊
  • 中国科技论文统计源期刊
  • 中国科学引文数据库来源期刊

西藏普兰地区冰碛土力学特性试验研究

贾敏才 郑一鸣 黄金

贾敏才, 郑一鸣, 黄金. 西藏普兰地区冰碛土力学特性试验研究[J]. 西南交通大学学报. doi: 10.3969/j.issn.0258-2724.20240406
引用本文: 贾敏才, 郑一鸣, 黄金. 西藏普兰地区冰碛土力学特性试验研究[J]. 西南交通大学学报. doi: 10.3969/j.issn.0258-2724.20240406
JIA Mincai, ZHENG Yiming, HUANG Jin. Research on Mechanical Properties of Glacial Tills in Purang Region of Xizang[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20240406
Citation: JIA Mincai, ZHENG Yiming, HUANG Jin. Research on Mechanical Properties of Glacial Tills in Purang Region of Xizang[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20240406

西藏普兰地区冰碛土力学特性试验研究

doi: 10.3969/j.issn.0258-2724.20240406
详细信息
    作者简介:

    贾敏才(1973—),男,副教授,研究方向为地基处理与离散元模拟,E-mail:mincai_jia@tongji.edu.cn

  • 中图分类号: TU441

Research on Mechanical Properties of Glacial Tills in Purang Region of Xizang

  • 摘要:

    为揭示西藏普兰地区冰碛土的力学行为,对天然状态表层冰碛土开展法向压力为100~400 kPa的现场直剪试验,对96%压实度冰碛土开展法向压力为100~400 kPa的室内大型直剪试验及围压为100~400 kPa的室内大型三轴试验. 试验结果表明:西藏普兰地区冰碛土91.7%压实度的天然状态下内聚力为11.0 kPa,内摩擦角为41.0°;在96%压实度时,内聚力为9.4~11.2 kPa,内摩擦角在45.3°~46.7°,且室内大型三轴试验所得强度参数高于大型直剪试验;96%压实度下冰碛土峰值强度高于天然状态,但初始阶段模量小于天然状态冰碛土;各级围压下,冰碛土应力-应变曲线均呈现软化特性,峰值应变随围压的增加先增大后减小;修正的邓肯-张模型可以较好地描述冰碛土偏应力与轴向应变关系,并体现普兰地区冰碛土的应变软化特性.

     

  • 图 1  现场冰碛土级配曲线

    Figure 1.  Gradation curve of in-situ glacial tills

    图 2  试验土样级配曲线

    Figure 2.  Gradation curves of test soil

    图 3  大型三轴仪

    Figure 3.  Large-scale triaxial apparatus

    图 4  现场直剪试验结果

    Figure 4.  Results of in-situ direct shear tests

    图 5  大型直剪试验结束试样形态

    Figure 5.  Samples after large-scale direct shear tests

    图 6  室内大型直剪试验结果

    Figure 6.  Results of laboratory large-scale direct shear tests

    图 7  大型三轴压缩结束部分试样形态

    Figure 7.  Samples after large-scale triaxial compression

    图 8  室内大型三轴试验结果

    Figure 8.  Results of laboratory large-scale triaxial tests

    图 9  现场直剪与室内大型直剪试验结果对比

    Figure 9.  Comparison of in-situ and laboratory large-scale direct shear test results

    图 10  室内大型三轴与大型直剪试验结果对比

    Figure 10.  Comparison of laboratory large-scale triaxial and direct shear test results

    图 11  邓肯-张模型拟合结果

    Figure 11.  Fitting results of Duncan-Chang model

    图 12  修正的邓肯-张模型拟合结果

    Figure 12.  Fitting results of modified Duncan-Chang model

    表  1  各地区冰碛土强度参数

    Table  1.   Strength parameters of glacial tills in different regions

    地区 试验类型 试样状态 土体内聚力/kPa 土体内摩擦角/(°)
    西藏普兰地区 现场直剪试验 天然状态(91.7% 压实度) 11.0 41.0
    西藏普兰地区 室内大型直剪试验 重塑土(96.0% 压实度) 9.4 45.3
    西藏普兰地区 室内大型三轴试验 重塑土(96.0% 压实度) 11.2 46.7
    西藏林芝市[1] 室内大型三轴试验 重塑土 27.0 33.8
    云南省丽江市[15] 室内大型直剪试验 原状土 32.6 39.3
    云南省丽江市[15] 室内大型直剪试验 重塑土 35.9 30.0
    四川省甘孜州[18] 现场直剪试验 天然状态 52.8 30.3
    下载: 导出CSV
  • [1] 蒋德旺,崔鹏,王姣,等. 细粒含量对冰碛土抗剪强度影响的实验研究[J]. 冰川冻土,2019,41(1): 129-139.

    JIANG Dewang, CUI Peng, WANG Jiao, et al. Experimental study on the effect of shear strength of moraine soil with fine grain content[J]. Journal of Glaciology and Geocryology, 2019, 41(1): 129-139.
    [2] 牛向东,侯克鹏,孙华芬. 基于关键块理论的井下泥石流机理力学模型研究[J/OL]. 西南交通大学学报,2024:1-12. (2024-03-29). http://kns.cnki.net/KCMS/detail/detail.aspx?filename=XNJT20240326005&dbname=CJFD&dbcode=CJFQ.
    [3] 梁俊岩,王成汤,陈娱,等. 降雨诱发作用下太和镇冰碛土古滑坡变形特征及其复活机制[J]. 科学技术与工程,2025,25(4): 1370-1377. doi: 10.12404/j.issn.1671-1815.2309686

    Liang Junyan, Wang Chengtang, Chen Yu, et al. Deformation characteristics of moraine soil ancient landslide and its resurrection mechanism in Taihe Town under rainfall-induced effects[J]. Science Technology and Engineering, 2025, 25(4): 1370-1377. doi: 10.12404/j.issn.1671-1815.2309686
    [4] 李奇龙,周佳庆,李长冬,等. 气候变化环境下青藏高原含冰冰碛土斜坡水热力耦合特性与长期稳定性[J]. 地质科技通报,2025,44(1): 112-125.

    LI Qilong, ZHOU Jiaqing, LI Changdong, et al. Coupling characteristics and stability evolution of ice-rich moraine soil slopes on the Tibetan Plateau under climate change[J]. Bulletin of Geological Science and Technology, 2025, 44(1): 112-125.
    [5] 刘佳诺,李明俐,姜元俊,等. 基于PFC2D的冻融循环作用下冰碛土微观损伤研究[J]. 地球科学,2025:1-18.

    Liu Jianuo, Li Mingli, Jiang Yuanjun, et al. Microscopic damage evolution of moraine soils under freeze-thaw cycles based on PFC2D simulation[J]. Earth Science, 2025: 1-18.
    [6] 刘振兴,王姣,崔鹏,等. 藏东南地区冰碛土强度特性对温度响应试验研究[J]. 地球科学,2025,50(1): 322-335.

    Liu Zhenxing, Wang Jiao, Cui Peng, et al. Experimental study on response of strength characteristics of glacier tills to temperature in southeast Tibet. Earth Science, 50(1): 322-335.
    [7] INSLEY A E, HILLIS S F. Triaxial shear characteristics of a compacted glacial till under unusually high confining pressures[C]//Sixth International Conference On Soil Mechanics and Foundation Engineering. 1965, 1: 244−248.
    [8] 蒙进,屈智炯. 高压下冰碛土的颗粒破碎及应力应变关系[J]. 成都科技大学学报,1989,21(1): 17-22,56.

    MENG Jin, QU Zhijiong. Stress-strain behaviour of glacial till under high confining pressure[J]. Advanced Engineering Sciences, 1989, 21(1): 17-22,56.
    [9] 谢春庆,刘都鹏. 冰碛层中架空块碎石成因及处理分析[J]. 路基工程,2006(6): 34-37. doi: 10.3969/j.issn.1003-8825.2006.06.016

    XIE Chunqing, LIU Dupeng. Cause and treatment analysis of overhead block gravel in moraine layer[J]. Subgrade Engineering, 2006(6): 34-37. doi: 10.3969/j.issn.1003-8825.2006.06.016
    [10] MCGOWN A, MCARTHUR A A. Morainic soil deposits and their use in lower cost roads[J]. Roads and Road Construction London, 1971, 49(587): 88-96.
    [11] 屈智炯,刘开明,肖晓军,等. 冰碛土微观结构、应力应变特性及其模型研究[J]. 岩土工程学报,1992,14(6): 19-28. doi: 10.3321/j.issn:1000-4548.1992.06.003

    QU Zhijiong, LIU Kaiming, XIAO Xiaojun, et al. Study of microstructure, stress-strain behavior and constitutive model of till[J]. Chinese Journal of Geotechnical Engineering, 1992, 14(6): 19-28. doi: 10.3321/j.issn:1000-4548.1992.06.003
    [12] SPRINGMAN S M, JOMMI C, TEYSSEIRE P. Instabilities on moraine slopes induced by loss of suction: a case history[J]. Géotechnique, 2003, 53(1): 3-10.
    [13] 徐鼎平,汪斌,江龙剑,等. 冰碛土三轴数值模拟试验方法探讨[J]. 岩土力学,2008,29(12): 3466-3470. [14 吕士展,汪稔,胡明鉴,等. 玉龙雪山西麓原状冰碛土CT扫描试验研究[J]. 岩土力学,2014,35(6): 1593-1599,1622.

    XU Dingping, WANG Bin, JIANG Longjian, et al. Study of methods of triaxial numerical simulation test of glacial till[J]. Rock and Soil Mechanics, 2008, 29(12): 3466-3470. LÜ Shizhan, WANG Ren, HU Mingjian, et al. Computerized tomography(CT) scanning test research on intact moraine soil on west side of Yulong snow mountain[J]. Rock and Soil Mechanics, 2014, 35(6): 1593-1599, 1622.
    [14] 王杜江. 藏东南察达沟谷冰碛堤工程适宜性研究[J]. 铁道工程学报,2021,38(6): 21-25,74. doi: 10.3969/j.issn.1006-2106.2021.06.005

    WANG Dujiang. Research on the engineering suitability of moraine dike in chada valley of southeast Tibet[J]. Journal of Railway Engineering Society, 2021, 38(6): 21-25,74. doi: 10.3969/j.issn.1006-2106.2021.06.005
    [15] 冯俊德,李建国,汪稔,等. 云南某铁路冰碛土大型直剪强度特性试验研究[J]. 岩土力学,2008,29(12): 3205-3210. doi: 10.3969/j.issn.1000-7598.2008.12.005

    FENG Junde, LI Jianguo, WANG Ren, et al. Large scale direct shear test on strength behavior of railway moraine soils in Yunnan[J]. Rock and Soil Mechanics, 2008, 29(12): 3205-3210. doi: 10.3969/j.issn.1000-7598.2008.12.005
    [16] 郭喜峰,王中豪. 冰碛土现场大尺寸蠕变试验研究[J]. 岩土工程学报,2023,45(增1): 144-147.

    GUO Xifeng, WANG Zhonghao. Large-scale field creep tests on moraine soil[J]. Chinese Journal of Geotechnical Engineering, 2023, 45(S1): 144-147.
    [17] 程强,郭喜峰. 泸定大渡河桥冰碛土的结构及现场剪切试验研究[J]. 水文地质工程地质,2019,46(4): 126-133.

    CHENG Qiang, GUO Xifeng. Soil structure and in-site shear test of moraine soil near the Xingkang Bridge over the Daduhe River in Luding[J]. Hydrogeology & Engineering Geology, 2019, 46(4): 126-133.
    [18] 程强,郭喜峰,杨莹辉. 泸定大渡河桥冰碛土剪切蠕变特性试验研究[J]. 工程科学与技术,2019,51(3): 26-35.

    CHENG Qiang, GUO Xifeng, YANG Yinghui. Experimental study of shear creep characteristic of moraine soil in Dadu River bridge in Luding[J]. Advanced Engineering Sciences, 2019, 51(3): 26-35.
    [19] 中华人民共和国工业和信息化部. 现场直剪试验规程:YS/T 5221—2019[S]. 北京:中国计划出版社,2020.
    [20] 中华人民共和国住房和城乡建设部. 土工试验方法标准:GB/T 50123—2019[S]. 北京:中国计划出版社,2019.
    [21] 中国民用航空局. 3民用机场岩土工程设计规范:MH/T 5027−201 [S]. 北京:中国民航出版社,2013.
    [22] 姜程程,范文,苑伟娜. 基于环剪试验的含钙质结核古土壤剪切特性[J]. 西南交通大学学报,2021,56(4): 809-817.

    JIANG Chengcheng, FAN Wen, YUAN Weina. Shear properties of paleosol containing calcareous concretions based on ring shear tests[J]. Journal of Southwest Jiaotong University, 2021, 56(4): 809-817.
    [23] 余云燕,罗崇亮,崔文豪,等. 冻融循环下盐渍土热质传递及盐冻胀机理[J/OL]. 西南交通大学学报,2023:1-8. (2023-10-07). http://kns.cnki.net/KCMS/detail/detail.aspx?filename=XNJT20230926009&dbname=CJFD&dbcode=CJFQ.
    [24] 赖远明,程红彬,高志华,等. 冻结砂土的应力-应变关系及非线性莫尔强度准则[J]. 岩石力学与工程学报,2007,26(8): 1612-1617. doi: 10.3321/j.issn:1000-6915.2007.08.011

    LAI Yuanming, CHENG Hongbin, GAO Zhihua, et al. Stress-strain relationships and nonlinear Mohr strength criterion of frozen sand clay[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(8): 1612-1617. doi: 10.3321/j.issn:1000-6915.2007.08.011
  • 加载中
图(12) / 表(1)
计量
  • 文章访问数:  61
  • HTML全文浏览量:  21
  • PDF下载量:  13
  • 被引次数: 0
出版历程
  • 收稿日期:  2024-08-13
  • 修回日期:  2024-11-27
  • 网络出版日期:  2025-04-17

目录

    /

    返回文章
    返回