[1]时伟,张亮,杨忠年,等.冻融循环条件下膨胀土力学特性试验研究[J].西安建筑科技大学学报(自然科学版),2019,51(04):480-485.[doi:10.15986/j.1006-7930.2019.04.003]
　SHI Wei,ZHANG Liang,YANG Zhongnian,et al.Experimental study on mechanical properties of expansive soilof artificial preparation under freeze-thaw cycle conditions[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2019,51(04):480-485.[doi:10.15986/j.1006-7930.2019.04.003]
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冻融循环条件下膨胀土力学特性试验研究()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
51
期数:
2019年04期
页码:
480-485
栏目:
出版日期:
2019-08-30

文章信息/Info

Title:
Experimental study on mechanical properties of expansive soilof artificial preparation under freeze-thaw cycle conditions
文章编号:
1006-7930(2019)04-0480-06
作者:
时伟1; 张亮2; 杨忠年1; 张莹莹1; 李国玉2; 刘学森1
(1.青岛理工大学 土木工程学院,山东 青岛266033;2. 中国科学院西北生态环境资源研究院冻土工程国家重点实验室,甘肃 兰州 730000)
Author(s):
SHI Wei1;  ZHANG Liang2;  YANG Zhongnian1;  ZHANG Yingying1;  LI Guoyu2;  LIU Xuesen1
(1.School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China; 2. State Key Laboratory of Frozen Soil EngineeringCold and Arid Regions Environmental and Engineering Research InstituteChinese Academy of Sciences Lanzhou 730000, China)
关键词:
膨胀土; 人工配制; 冻融循环; 动剪切模量; 阻尼比
Keywords:
expansive soil;  artificial preparation;  freeze-thaw cycles;  dynamic shear modulus; damping ratio
分类号:
TU411
DOI:
10.15986/j.1006-7930.2019.04.003
文献标志码:
A
摘要:
为研究人工配制膨胀土作为深季节冻土室内模型试验材料，其力学特性随冻融循环的变化规律，将其与原位膨胀土进行对比.通过两者压缩试验结果的分析可以发现，有关抗剪强度参数，两者均表现出随冻融循环次数增加而减小的规律.与原位膨胀土相比，人工配制膨胀土因受冻融循环次数影响，内摩擦角下降速率更低,粘聚力下降的速率更高.两者在动应变相同的情况下，随冻融循环次数累积，动剪切模量均减小，阻尼比均增加，且阻尼比改变的最大值均发生在第一次冻融循环，之后冻融循环过程中人工配制膨胀土阻尼比随冻融循环次数增加的变化量大于原位膨胀土，其变化速率较稳定，与人工配制膨胀土表现出规律一致性
Abstract:
In order to study the mechanical characteristics of artificially configured expansive soils as a model material for deep-season thawing experiment in freezing-thawing cycles, they are compared with in-situ expansive soils. Through analysis of the compression test results of the two, the rate of internal friction angle is found to decrease, and so is the rate of cohesion. The artificially prepared expansive soil and the in-situ expansive soil are affected by the number of freeze-thaw cycles. Similarly, when the dynamic strain is the same, the dynamic shear modulus decreases and the damping ratios increases with the number of freeze-thaw cycles, and the maximum value of damping ratio changes occur in the first freeze-thaw cycle. After the freeze-thaw cycle, the damping ratio of artificially-expanded soil increases with the number of freeze-thaw cycles. The amount of change is larger than that of in-situ expansive soil, and the rate of change is relatively stable, which shows a regular consistency with the artificially prepared expansive soil.

参考文献/References:

[1]MITEHELL J K. Fundamentals of Soil Behavior[M]. 2nd ed. New York: John Wiley and Sons, 1993. 131-160.

[2]MORGENSTEM N R. Microscopic structure in kaolin subjected to direct shear[J]. Geotechnique, 1967, 17(4): 309-328.

[3]LAMBER W T. Structure of compacted clay[J]. Journal of the Soil Mechanics and Foundation Division, American Society of Civil Engineers, 1958, 84(SM2): 1-34.

[4]SEED H B, CHAN C K. Structure and strength characteristic of compacted clays[J]. Journal of the Soil Mechanics and Foundation Division, American Society of Civil Engineers, 1959, 85(SM5). 87-128.

[5]廖世文.膨胀土与铁路工程[M] 北京：中国铁道出版社，1984.

LIAO Shiwen. Expansive soil and railway engineering[M]. Beijing: China Railway Press, 1984.

[6]范·奥尔芬.粘土胶体化学导论[M].北京农业出版社, 1979

VAN OPPHEN. A introduction to clay colloid chemistry[M]. Beijing: China Agriculture Press,1984.

[7]王超. 季冻区哈大高铁边坡冻融滑塌机理研究[D].哈尔滨：哈尔滨工业大学,2014.

WANG chao，Research on freeze-thaw slumping mechanism of harbin-dalian high-speed railway slope in seasonally frozen soil region [D]. Harbin： Harbin Institute of Technology ,2014.

[8]许雷,刘斯宏,鲁洋,等.冻融循环下膨胀土物理力学特性研究[J].岩土力学,2016,37(S2):167-174.

XU lei, LIU Sihong, LU Yang, et al. Physico-mechanical properties of expansive soil under freeze-thaw cycles [J]. Rock and soil Mechanics, 2016, 37(S2):167-174.

[9]胡莫珍,谈云志,吴翩,等.冻融循环对改良软粘土压缩特性的影响[J].广西大学学报(自然科学版),2015,40(1):208-212.

HU Mozhen, DAN Yunzhi, WU Pian, et al. The effect of freeze-thaw cycles on compressive properties of improved soft clay[J].Journal of Guangxi University: Nat Sci Ed ,2015,40(1):208-212.

[10]杨俊,童磊,许威.冻融循环影响风化砂改良膨胀土抗剪强度室内试验研究[J].工程地质学报, 2015, 23(1):65-71.

YANGjun, TONG lei, XU wei. Laboratory research on effect of freeze-thaw cycles to shear strength of weathered sand improved with expansive soi[J]. Journal of Engineering Geology, 2015, 23(1):65-71.

[11]黄志全,张茜,吴超,等.膨胀土动力学特性变化规

律试验研究[J].华北水利水电大学学报(自然科学版),2016,37(2):78-82.

HUANG Zhi quan,ZHANG Qian, WU Chao， et al. Experimental study on the variational regularity of dynamic characteristics of expansive soil [J]. Journal of North China University of Water Resources and Electric Power (Natural Science Edition), 2016, 37(2): 78-82.

[12]毛成,邱延峻.膨胀土与改性膨胀土的动力特性试验研究[J].岩石力学与工程学报,2005(10): 1783-1788.

MAO Cheng，QIU Yanjun. Testing study on dynamic properties of expansive soil[J] Chinese Journal of Rock Mechanics and Engineering, 2005 (10): 1783-1788.

[13]OTHMAN M A, BENSON C H. Effect of freeze-thaw on the hydraulic conductivity and morphology of compacted clay[J]. Canadian Geotechnical Journal, 1993, 30(2):236-246.

[14]QI J, MA W, SONG C. Influence of freeze-thaw on engineering properties of a silty soil [J]. Cold RegionsScience and Technology, 2008, 53(3): 397-404.

[15]SHOOP S, AFFLECK R, HAEHNEL R, et al. Mechanical behavior modeling of thaw-weakened soil[J]. Cold Regions Science and Technology, 2008, 52(2): 191-206.

[16]陈忠,沈明道,赵敬松,等.粘土矿物含量分析中的几个问题[J].沉积学报,1998(1):137-139.

备注/Memo

备注/Memo:
收稿日期:2018-05-29
修改稿日期:2019-06-10
基金项目:冻土工程国家重点实验室开放基金(SKLFSE201601)
第一作者:时伟(1964-)，女，硕士，教授，主要从事边坡稳定性及深基坑支护研究.E-mail：susan.sw@.163.com
通信作者:张亮(1993-)，男，博士生，主要研究边坡稳定性．E-mail: zhangliang606@163.com
更新日期/Last Update: 2019-09-17