[1]杨 俊,黎新春,童 磊.风化砂改良高液限红粘土强度特性试验研究[J].南京理工大学学报(自然科学版),2015,39(02):181-186.
 Yang Jun,Li Xinchun,Tong Lei.Test on strength property of weathered sand improved high liquid limit red clay[J].Journal of Nanjing University of Science and Technology,2015,39(02):181-186.
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风化砂改良高液限红粘土强度特性试验研究
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《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
39卷
期数:
2015年02期
页码:
181-186
栏目:
出版日期:
2015-04-30

文章信息/Info

Title:
Test on strength property of weathered sand improved high liquid limit red clay
作者:
杨 俊12黎新春12童 磊12
三峡大学1.三峡地区地质灾害与生态环境湖北省协同创新中心; 2.土木与建筑学院,湖北 宜昌 443002
Author(s):
Yang Jun12Li Xinchun12Tong Lei12
1.Collaborative Innovation Center of Geological Hazards and Ecological Environment in Three Gorges Area in Hubei Province; 2.College of Civil Engineering and Architecture,China Three Gorges University,Yichang 443002,China
关键词:
高液限红粘土 风化砂 抗剪强度 加州承载比 无侧限抗压强度 回弹模量 收缩特性
Keywords:
high liquid limit red clay weathered sand shear strength California bearing ratio unconfined compressive strength modulus of resilience shrinkage characteristics
分类号:
TU411.3
摘要:
针对高液限红粘土易收缩、可压实及水稳定性差等不良性质,该文开展了风化细砂改良高液限红粘土研究。分别研究了不同比例风化细砂改良的高液限红粘土的抗剪强度、加州承载比(CBR)、无侧限抗压强度和回弹模量,得到了不同掺砂比例下高液限红粘土的黏聚力、内摩擦角、CBR值、无侧限抗压强度和回弹模量。研究结果表明,掺砂能够明显提高红粘土的CBR值、回弹模量和内摩擦角,但降低了改良土的抗剪强度、无侧限抗压强度和粘聚力; 掺砂对红粘土内摩擦角的影响小于对粘聚力的影响; 抗剪强度指标随着掺砂比例的改变呈现不同的变化趋势,掺砂比
Abstract:
In view of that the high liquid limit red clay has the shrinkage,the compactibility,the poor water stability and other adverse natures,its shear strength,California bearing ratio(CBR),unconfined compressive strength and rebound modulus are studied under the different ratios of weathered sand,and the internal friction angle,the CBR value,the unconfined compressive strength and the modulus of resilience are obtained.The results show that,after adding the weathered sand,the red clay's CBR value,the resilient modulus and the internal friction angle increase,and its shear strength,unconfined compressive strength and cohesion decrease.The effect of adding sanding on the internal friction angle of the red clay is less than that on the cohesion.The shear strength index changes with the sand ratio,and the change of the shear strength index within 0% ~ 10% sand ratio is smaller and it reaches the maximum when the sand ratio is 40% ~ 50%.After adding sand,the unconfined compressive strength average value and the presentative value of the improved soil decrease,and their change trends with the mixed sand ratio is the same.The compressive strength values decrease greatly with the sand ratio from 0% to 40% and slowly with the sand ratio more than 40%.The CBR value and the elasticity modulus of the improved soil change in the same trend with the sand ratio.When the sand ratio increases from 0% to 10%,the increase of the CBR and the resilient modulus is smaller.When the sand ratio increases from 10% to 30%,the increase of the CBR and the resilient modulus reaches maximum.When the sand ratio is greater than 30%,the increase trend of the CBR and the resilient modulus gradually flattens.Incorporation of the weathered sand can effectively reduce the liquid limit of the red clay,the plasticity index and the shrinkage characteristics.When the weathered sand ratio is more than 10%,the expansion and contraction of the total rate of the red clay is less than 0.7%,reaching the the subgrade standards.The 30% sand ratio is the best for all the strength index.

参考文献/References:

[1] 罗斌,赵雄.碎石改良高液限红粘土的试验研究[J].公路工程,2009,34(2):131-134.
Luo Bin,Zhao Xiong.Test study on improving high liquid limit red clay with crushed stone[J].Highway Engineering,2009,34(2):131-134.
[2]莫百金,李跃军.砂砾改良高液限红粘土的试验研究[J].公路,2008,8:226-229.
Mo Baijin,Li Yuejun.Test study on improving high liquid limit red clay with gravel[J].Highway,2008,8:226-229.
[3]杨庆,贺洁,栾茂田.非饱和红粘土和膨胀土抗剪强度的比较研究[J].岩土力学,2003,24(1):13-16.
Yang Qing,He Jie,Luan Maotian.Comparative study on shear strength of unsaturated red clay and expansive soils[J].Rock and Soil Mechanics,2003,24(1):13-16.
[4]沙玲,王国才,金菲力,等.淤泥再生混合轻质土强度特性试验研究[J].南京理工大学学报,2013,37(3):441-446.
Sha Ling,Wang Guocai,Jin Feili,et al.Experimental study on strength properties of mixed lightweight soil from recycled sludge[J].Journal of Nanjing University of Science and Technology,2013,37(3):441-446.
[5]刘燕燕,李建军,黄中文.不同压实度条件下高液限红粘土工程性质研究[J].中外公路,2011,31(6):73-76.
Liu Yanyan,Li Jianjun,Huang Zhongwen.Study on engineering properties of red clay with high liquid limit under different degree of compaction[J].Journal of China & Foreign Highway,2011,31(6):73-76.
[6]金叶玲,钱运华,程晓春,等.改性白云石凹凸棒土在橡胶中填充的可行性探讨[J].南京理工大学学报,2005,29(6):720-723.
Jin Yeling,Qian Yunhua,Cheng Xiaohua,et al.Filling feasibility of modified dolomite-attapulgite in rubber[J].Journal of Nanjing University of Science and Technology,2005,29(6):720-723.
[7]陈开圣,胡鑫.高液限红粘土变形特性研究[J].公路交通科技,2010,27(3):49-54.
Chen Kaisheng,Hu Xin.Study on deformation characteristic for high liquid limit red clay[J].Journal of Highway and Transportation Research and Development,2010,27(3):49-54.
[8]袁腾方,殷颖,刘小平.桂武高速碳酸盐高液限红粘土压实特性研究[J].公路工程,2009,34(6):104-107.
Yuan Tengfang,Yin Ying,Liu Xiaoping.Study on the compactness of carbonate red clay of high liquid limit in Guiwu expressway[J].Highway Engineering,2009,34(6):104-107.
[9]陈开圣.高液限红粘土CBR试验[J].公路,2010,2:148-151.
Cen Kaisheng.Test study on CBR of high liquid limit red clay[J].Highway,2010,2:148-151.
[10]王亮亮,杨果林.红粘土抗剪强度与影响因子作用机理分析[J].铁道科学与工程学报,2009,6(6):44-48.
Wang Liangliang,Yang Guolin.Effect mechanism analysis of red clay between shear strength and influential factors[J].Journal of Railway Science and Engineering,2009,6(6):44-48.
[11]董城,冷伍明,李志勇.水泥改良高液限粘土动态回弹模量试验研究[J].岩土力学,2013,34(1):133-138.
Dong Cheng,Leng Wuming,Li Zhiyong.Experimental study on dynamic resilient modulus of cement-improved high liquid limit clay[J].Rock and Soil Mechanics,2013,34(1):133-138.
[12]汤新福,赵云刚.含水量对压实粘土抗剪强度的影响[J].金属材料与冶金工程,2009,37(3):49-53.
Tang Xinfu,Zhao Yungang.The influence of moisture content on shear strength of compactness clay[J].Metal Materials and Metallurgical Engineering,2009,37(3):49-53.
[13]郝孟辉,郝培文.土石混填路基动态回弹模量与压实度的关系[J].南京林业大学学报(自然科学版),2011,35(1):87-90.
Hao Menghui,Hao Peiwen.Relationship between dynamic resilient modulus and compaction degree of soil rock embankment[J].Journal of Nanjing Forestry University(Natural Science Edition),2011,35(1):87-90.
[14]王中文,洪宝宁,刘鑫.红粘土抗剪强度的水敏性研究[J].四川大学学报(工程科学版),2011,43(1):17-22.
Wang Zhongwen,Hong Baoning,Liu Xin.Water-sensitive properties of shear strength of red clay[J].Journal of Sichuan University(Engineering Science Edition),2011,43(1):17-22.

备注/Memo

备注/Memo:
收稿日期:2013-10-30 修回日期:2014-07-04
基金项目:湖北省公路管理局2013年度自然科学研究项目
作者简介:杨俊(1976-),男,博士,副教授,主要研究方向:不良路基处理,E-mail:wangjing750301@163.com。
引文格式:杨俊,黎新春,童磊.风化砂改良高液限红粘土强度特性试验研究[J].南京理工大学学报,2015,39(2):181-186.
投稿网址:http://zrxuebao.njust.edu.cn
更新日期/Last Update: 2015-04-30