不同排水条件下饱和砂土快速大剪切力学特性

doi:10.13278/j.cnki.jjuese.20170116

吉林大学学报(地球科学版) ›› 2018, Vol. 48 ›› Issue (5): 1416-1426.doi: 10.13278/j.cnki.jjuese.20170116

不同排水条件下饱和砂土快速大剪切力学特性

洪勇¹, 周蓉¹, 郑孝玉²

1. 青岛理工大学土木工程学院, 山东青岛 266033;
2. 吉林大学建设工程学院, 长春 130026

收稿日期:2018-01-18 发布日期:2018-11-20
作者简介:洪勇(1970-),男,教授,博士,主要从事岩土力学与地质灾害方面的研究,E-mail:hongyong11@aliyun.com
基金资助:
国家自然科学基金项目（41272341，41572259）；山东省高等学校科技计划项目（J12LG08）；成都理工大学国家重点实验室开放基金项目（SKLGP2012K013）

Fast Shear Mechanical Properties of Saturated Sand Under Different Drainage Conditions

Hong Yong¹, Zhou Rong¹, Zheng Xiaoyu²

1. Civil Engineering College, Qingdao University of Technology, Qingdao 266033, Shandong, China;
2. College of Construction Engineering, Jilin University, Changchun 130026, China

Received:2018-01-18 Published:2018-11-20
Supported by:
Supported by National Natural Science Foundation of China(41272341,41572259), Science and Technology Project in Colleges and Universities of Shandong Province(J12LG08)and Opening Fund of Key Laboratory of Chengdu University of Technology(SKLGP2012K013)

摘要/Abstract

摘要： 为探索滑坡灾害中土在复杂条件下的剪切力学特性，本文利用大型环剪试验机，通过进行各种排水条件下的连续大位移剪切试验，对不同法向应力、剪切速率和孔隙水压力等复杂条件下饱和砂土的力学特性及其变化机理进行了研究。结果表明：1）在连续快速剪切条件下，砂土剪切力学特性在干燥、不排水和排水等条件下呈现不同的变化形式。其中在不排水条件下，饱和砂出现一定的应变软化现象。2）在相同正应力和剪切速率的环剪试验中，饱和砂在不同排水条件下（上排水、下排水、上下排水）的抗剪强度出现显著差异。3）在排水环剪试验条件下，砂土剪切应力与强度的差异性变化不仅与土体内细土颗粒运移和结构变化有关，并且受到剪切过程中不同排水条件下孔隙水压力变化的影响和控制。4）排水环剪条件下，饱和砂孔隙水压力的消散变化不仅与不同排水方式下土体内所形成的排水通道顺畅程度有关，并且受到不同剪切速率和法向应力的影响作用。

关键词: 环剪试验, 抗剪强度, 法向应力, 剪切速率, 孔隙水压力

Abstract: In order to explore the mechanical properties and mechanisms of saturated sands under different normal stresses, shearing rates and pore water pressures, a continuous large displacement shear test was conducted by using a large ring-shear test apparatus. The research results demonstrated that:1) Given continuous fast shearing, the shearing mechanical properties of sands changed differently under dry, non-drainage and drainage conditions. The saturated sands presented certain strain softening under the non-drainage condition. 2) In the ring-shear test with the same positive stress and shearing rate, the shear strengths of the saturated sands differed significantly under the different drainage conditions (upper drainage, down drainage and up-down drainage). 3) Under the drainage conditions in the ring-shear test, the difference between shearing stress and strength of sands was not only related with the fine particle movement and structural changes, but also influenced and controlled by the variations of the pore water pressure in the shearing process. 4) Given drainage ring-shearing, the dissipation of pore water pressure of saturated sands was related with the smoothness of the drainage channels formed in the soil under the different drainage modes, and influenced by different shearing rates and normal stress.

Key words: ring shear test, shear strength, normal stress, shear rate, pore water pressure

中图分类号:

P642.13

洪勇, 周蓉, 郑孝玉. 不同排水条件下饱和砂土快速大剪切力学特性[J]. 吉林大学学报(地球科学版), 2018, 48(5): 1416-1426.

Hong Yong, Zhou Rong, Zheng Xiaoyu. Fast Shear Mechanical Properties of Saturated Sand Under Different Drainage Conditions[J]. Journal of Jilin University(Earth Science Edition), 2018, 48(5): 1416-1426.

参考文献

[1] 徐张建,林在贯,张茂省. 中国黄土与黄土滑坡[J].岩石力学与工程学报, 2007, 26(7):1297-1312. Xu Zhangjian, Lin Zaiguan, Zhang Maosheng. Loess China and Loess Landslides[J]. Journal of Rock Mechanics and Engineering, 2007, 26(7):1297-1312.
[2] 彭令,徐素宁,彭军还. 多源遥感数据支持下区域滑坡灾害风险评价[J].吉林大学学报(地球科学版), 2016, 46(1):175-186. Peng Ling, Xu Suning, Peng Junhuan. Regional Landslides Risk Assessment Using Multi-Source Remote Sensing Data[J]. Journal of Jilin University (Earth Science Edition), 2016, 46(1):175-186.
[3] Hong Yong, Yu Guangming, Wu Yingxia, et al. Effect of Cyclic Loading on the Residual Strength of Over-Consolidated Silty Clay in a Ring Shear Test[J]. Journal of International Consortium on Landslides, 2011, 8(2):233-240.
[4] 龙建辉,李同录,雷晓峰. 黄土滑坡滑带土的物理特性试验研究[J].岩土工程学报,2007, 29(2):289-293. Long Jianhui, Li Tonglu, Lei Xiaofeng. Study on Physical Properties of Soil in Sliding Zone of Loess Landslide[J]. Chinese Journal of Geotechnical Engineering, 2007, 29(2):289-293.
[5] 田斌,戴会超,王世梅. 滑带土结构强度特征及其强度参数取值研究[J].岩石力学与工程学报, 2004,23(17):2887-2892. Tian Bin, Dai Huichao, Wang Shimei. Study on Strength Chracteristics of Soil in Slide Zone and Determination of Its Parameters[J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 23(17):2887-2892.
[6] 卢坤林,朱大勇,许强, 等. 滑带土抗剪强度参数的三维反分析[J].岩土力学, 2010,31(10):3319-3328. Lu Kunlin, Zhu Dayong, Xu Qiang, et al. Three-Dimensional Inverse Analysis of Shear Strength Parameter of Sliding Zone Soil[J]. Rock and Soil Mechanics, 2010, 31(10):3319-3328.
[7] 王洪兴,唐辉明,陈聪. 滑带土黏土矿物定向性的X射线衍射及其对滑坡的作用[J].水文地质工程地质, 2004(增刊):79-81. Wang Hongxing, Tang Huiming, Chen Cong. Study On X-Ray Diffraction for the Orientability of Clay Minerals in Sliding Soil[J]. Hydrogeology & Engineering Geology, 2004(Sup.):79-81.
[8] 郑明新. 论滑带土强度特征及强度参数的反分析[J].岩土力学, 2003, 24(4):528-532. Zheng Mingxin. Research of Strength Characteristic of Landslide Slip and Revised Counter Calculation Method[J]. Rock and Soil Mechanics,2003,24(4):528-532.
[9] 张昆,郭菊彬. 滑带土残余强度参数试验研究[J].铁道工程学报, 2007(8):13-15,26. Zhang Kun, Guo Jubin. Experimental Research on the Residual Strength Parameters of Slip Soils[J]. Journal of Railway Engineering, 2007(8):13-15,26.
[10] 程圣国,方坤河,罗先启,等. 三峡库区新生型滑坡滑带土抗剪强度确定概率方法[J].岩石力学与工程学报, 2007, 26(4):840-844. Cheng Shengguo, Fang Kunhe, Luo Xianqi, et al. Probability Method to Determine Shear Strength of Slide Zone Clay for Neogenic Landslide in Three Gorges Reservoir Area[J]. China Journal of Rock Mechanics and Engineering, 2007, 26(4):840-844.
[11] 罗冲,殷坤龙,陈丽霞. 万州区滑坡滑带土抗剪强度参数概率分布拟合及其优化[J].岩石力学与工程学报, 2005, 24(9):1588-1593. Luo Chong, Yin Kunlong, Chen Lixia. Probability Distribution Fitting and Optimization of Shear Strength Parameters in Sliding Zone Along Horizontal-Stratum Landslides in Wanzhou City[J]. China Journal of Rock Mechanics and Engineering, 2005, 24(9):1588-1593.
[12] 洪勇,岳玉秋,郑孝玉,等. 大连滨海粉质黏土剪切力学特性环剪试验[J].吉林大学学报(地球科学版),2016, 46(5):1475-1481. Hong Yong, Yue Yuqiu, Zheng Xiaoyu, et al. Shear Strength of Silty Clay in Dalian by Ring Shear Tests[J]. Journal of Jilin University (Earth Science Edition), 2016, 46(5):1475-1481.
[13] Suzuki M, Umezaki T, Kawakami H. Residual Strength of Soil by Direct Shear Test[J]. Journal of Geotechnical Engineering, 2000,50:37-50.
[14] 洪勇,孙涛,栾茂田,等. 土工环剪仪的开发及应用研究现状[J]. 岩土力学,2009,30(3):628-634. Hong Yong, Sun Tao, Luan Maotian, et al. Development and Application of Geotechnical Ring Shear Apparatus:An Overview[J]. Rock and Soil Mechanic, 2009, 30(3):628-634.
[15] 许领,戴福初. 泾阳南塬黄土滑坡特征参数统计分析[J].水文地质工程地质,2008,35(5):28-32. Xu Ling, Dai Fuchu. Statistical Analysis of the Characteristic Parameters of Loess Landslides at the South Jingyang Plateau[J]. Hydrogeology & Engineering Geology, 2008, 35(5):28-32.
[16] 段钊,彭建兵,王启耀. 泾阳南塬黄土滑坡的运动规律与液化效应[J]. 水土保持通报,2016,36(3):46-49. Duan Zhao, Peng Jianbing, Wang Qiyao. Motion Law and Liquefaction Effect of Loess Landslides in South Jingyang Plateau[J]. Bulletin of Soil and Water Conservation, 2016, 36(3):46-49.
[17] 岳玉秋. 异质土体间大剪切力学特性环剪试验研究[D].青岛:青岛理工大学,2015. Yue Yuqiu. Ring Shear Study on Large Shear Mechanic Properties Between Heterogeneous Soils[D]. Qingdao:Qingdao Techlogogy of University, 2015.
[18] 卢廷浩,刘祖德. 高等土力学[M]. 北京:机械工业出版社,2005. Lu Tinghao, Liu Zude. Advanced Soil Mechanics[M]. Beijing:Machinery Industry Press, 2005.
[19] 松冈元.土力学[M].罗汀,姚仰平,译. 北京:中国水利水电出版社, 2001. Song Gangyuan. Soil Mechanics[M]. Translated by Luo Ting, Yao Yangping. Beijing:China Water Power Press, 2001.
[20] 李广信. 高等土力学[M].北京:清华大学出版社, 2004. Li Guangxin. Advanced Soil Mechanics[M]. Beijing:Tsinghua University Press,2004.
[21] Terzaghi K, Peck P B, Mesri G. Soil Mechanics[M]. New York:John Wiley&Sons,1996:121-135.
[22] Agung W M, Sassa K, Fukuoka H, et al. Evolution of Shear-Zone Structure in Undrained Ring Shear Tests[J]. Landslides, 2004, 1(1):101-112.
[23] Wang G H, Sassa K. Post-Failure Mobility of Saturated Sands in Undrained Load-Controlled Ring Shear Tests[J]. Canadian Geotechnical Journal, 2002, 39(4):821-837.
[24] Okada Y, Sassa K, Fukuoka H. Excess Pore Pressure and Grain Crushing of Sands by Means of Undrained and Naturally Drained Ring-Shear Tests[J]. Engineering Geology, 2004, 75(4):325-343.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed

不同排水条件下饱和砂土快速大剪切力学特性

Fast Shear Mechanical Properties of Saturated Sand Under Different Drainage Conditions

PDF (PC)

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 9

Metrics

本文评价

推荐阅读 0

[1]	苟富刚, 龚绪龙, 王光亚. 连云港海相软土不排水强度特征[J]. 吉林大学学报(地球科学版), 2018, 48(4): 1165-1173.
[2]	洪勇, 车效文, 郑孝玉, 刘鹏, 周蓉. 陕西泾阳南塬滑坡干湿黄土快速大剪切力学特性[J]. 吉林大学学报(地球科学版), 2017, 47(4): 1207-1218.
[3]	洪勇, 岳玉秋, 郑孝玉, 车效文, 刘鹏. 大连滨海粉质黏土剪切力学特性环剪试验[J]. 吉林大学学报(地球科学版), 2016, 46(5): 1475-1481.
[4]	赵权利，尚岳全，支墨墨. 平推式滑坡启动判据的修正[J]. 吉林大学学报(地球科学版), 2014, 44(2): 596-602.
[5]	沈宇鹏, 冯瑞玲, 余江, 刘辉. 增压式真空预压处理软基的加固机理[J]. J4, 2012, 42(3): 792-797.
[6]	闫春岭, 唐益群, 王元东, 李仁杰. 循环荷载下加固土体孔压的模糊正交试验分析[J]. J4, 2011, 41(3): 805-811.
[7]	王常明, 马栋和, 林容, 王科, 宋朋燃. 辽西地区黄土的强度与本构特性[J]. J4, 2010, 40(5): 1104-1109.
[8]	吴春勇，王剑平，李景林，王清，史彬. 超深方块码头稳定性的离心模型试验[J]. J4, 2006, 36(03): 399-403.
[9]	张延军. 边坡渗流耦合变形分析方法的研究及其应用[J]. J4, 2006, 36(01): 103-0107.