相对密实度对松散堆积土体强度变形特性的影晌

doi:10.3969/j.issn.1674-0696.2013.06.20

重庆交通大学学报（自然科学版） ›› 2013, Vol. 32 ›› Issue (6): 1186-1189.DOI: 10.3969/j.issn.1674-0696.2013.06.20

相对密实度对松散堆积土体强度变形特性的影晌

王俊杰^1,2，邓文杰^1,3

1.重庆交通大学国家内河航道整治工程技术研究中心，重庆 400074;2.重庆交通大学水利水运工程教育部重点实验室，重庆 400074;3.重庆川东南地质丁-程勘察设计院，重庆 400038

收稿日期:2012-11-14 修回日期:2013-06-25 出版日期:2013-12-15 发布日期:2015-01-22
作者简介:王俊杰(1973—)，男，甘肃陇商人，教授，博士，博士生导师，主要从事水利工程、岩土工程方面的研究。E-maiI:wangiunjiehhu@163.com
基金资助:
"十二五"国家科技支撑计划基金项目(2012BAB05B04) ;重庆市基础与前沿研究计划项目(cstc2013jcyjA30009)

Effects of Relative Denseness on Shear Strength and Deformation Behaviors of Loose Deposit

Wang Junjie^1,2 , Deng Wenjie^1,3

1.National Engineering Research Center for Inland Watenvay Regulation , Chongqing Jiaotong University , Chongqing 400074 , China; 2.Key Laboratory of Hydraulic & Watenvay Engineering of MOE , Chongqing Jiaotong University , Chongqing 400074 , China; 3.Chongqing Southwest Geological Engineering Investigation and Design Institute , Chongqing 400038 , China

Received:2012-11-14 Revised:2013-06-25 Online:2013-12-15 Published:2015-01-22

摘要/Abstract

摘要： 2008年汶川大地震后，在震中及附近地区形成了大量的松散堆积体，利用GDS兰轴试验系统，对典型的松散堆积士体在不同相对密实度下的强度和变形特性进行了试验研究。结果表明:松散堆积土体应力应变曲线形态与围压有关，低围压时，表现为应变软化型，随着围压的增加，为应变硬化型;相对密实度越大，峰值主应力差越大;考虑、土体秸聚力的影响时，抗剪强度参数c、伊值均随相对密实度的增大而增大;不考虑土体教聚力的影响时，松散堆积土体峰值内摩擦角随相对密实度的增加而增加，而随围压的增加而减小

关键词: 松散堆积土体, 变形特'性, 强度特性, 相对密实度

Abstract: After 2008 large Wenchuan earthquake , a large number of loose deposit were distributed in and near the epicenter. To study the strength and deformation characteristics of the typicalloose deposit in this area , the GDS tri-axial test system was used , considering the different relative denseness. The test results indicate that under low confining pressure , the soils are characterized by weak strain softening; while the confining pressure increases , the soilsare strain hardening; the lager the relative denseness is , the bigger the peak stress; when considering the cohesion of the soil , the shear strength parameters increase with the increment of the relative denseness; ignoring the effect of the cohesion in the soil , the peak angle of shearing resistance increases with the increment of the relative denseness , while decreases with the increase of confining pressure.

Key words: loose deposit, deformation characteristics, strength characteristics, relative denseness

中图分类号:

TU411

王俊杰，邓文杰. 相对密实度对松散堆积土体强度变形特性的影晌[J]. 重庆交通大学学报（自然科学版）, 2013, 32(6): 1186-1189.

Wang Junjie , Deng Wenjie. Effects of Relative Denseness on Shear Strength and Deformation Behaviors of Loose Deposit[J]. Journal of Chongqing Jiaotong University(Natural Science), 2013, 32(6): 1186-1189.

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相对密实度对松散堆积土体强度变形特性的影晌

Effects of Relative Denseness on Shear Strength and Deformation Behaviors of Loose Deposit

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[2]	雷胜友. V形沟谷加筋土支挡结构强度特性分析[J]. 重庆交通大学学报（自然科学版）, 2001, 20(1): 65-68.