湿陷性黄土地基侧向防渗结构模型试验研究
|
摘要
水分对于湿陷性黄土地基具有重要影响。本文通过室内土工试验,得到兰州黄土和灰土的物理力学参数;并通过室内模型试验研究了不同侧向防渗结构对于路基的侧向防渗效果;同时对路基进行了沉降监测。试验结果表明:灰土的渗透系数远小于黄土的渗透系数;经过灰土挤密桩和灰土防渗墙处理的工况,其土中含水量远小于不作侧向防渗处理的情况,且路基的湿陷变形情况明显改善。其中灰土防渗墙的防渗效果比灰土挤密桩的更好。试验结果可有效地指导湿陷性黄土路基的防渗处理,为湿陷性黄土地基处理提供新的思路。
Water plays a pivotal role in influencing collapsible loess foundation. In this article,the physical and mechanical parameters of loess and lime soil in Lanzhou are obtained through indoor geotechnical test. The effect of different structures to control lateral seepage in subgrade loess soil is studied through indoor model test. At the same time,the settlement of roadbed is monitored. The experimental results reveal that the permeability coefficient of the lime soil is much less than the coefficient of permeability of loess. After processed by lime-soil compaction pile and lime-soil impervious wall,the moisture content of loess is far less than the value that the lateral seepage control processing is not made. Collapsibility deformation of subgrade is obviously improved. The effect of lime-soil impervious wall is better than the lime-soil compaction pile. The test results can guide the collapsible loess subgrade seepage prevention effectively,and provide a new idea for collapsible loess foundation treatment.
Water plays a pivotal role in influencing collapsible loess foundation. In this article,the physical and mechanical parameters of loess and lime soil in Lanzhou are obtained through indoor geotechnical test. The effect of different structures to control lateral seepage in subgrade loess soil is studied through indoor model test. At the same time,the settlement of roadbed is monitored. The experimental results reveal that the permeability coefficient of the lime soil is much less than the coefficient of permeability of loess. After processed by lime-soil compaction pile and lime-soil impervious wall,the moisture content of loess is far less than the value that the lateral seepage control processing is not made. Collapsibility deformation of subgrade is obviously improved. The effect of lime-soil impervious wall is better than the lime-soil compaction pile. The test results can guide the collapsible loess subgrade seepage prevention effectively,and provide a new idea for collapsible loess foundation treatment.
引文
Gong X N,Yang H G,Liu C L,et al.2008.Ground improvemen handbook[M].3rd ed.Beijing:China Building Industry Press:166~169.
Guo T T,Zhang B P,Tian Z G,et al.2004.Study on engineerin characteristic of lime-flyash loess[J].Chinese Journal o Geotechnical Engineering,26(5):721~729.
Huang X F,Chen Z H,Fang X W,et al.2007.Study on foundation treatment thickness and treatment method for collapse loess with large thickness[J].Chinese Journal of Rock Mechanics and Engineering,26(S2):4332~4338.
Huang X F,Zhang G P,Yao Z H,et al.2011.Research on deformation permeability regularity and foundation treatment method of deadweight collapse loess with heavy section[J].Rock and Soi Mechanics,32(S2):100~108.
Liu D L.2012.Experimental study on collapsible loess foundation treatment for high-speed railway[D].Beijing:China Academy o Railway Science.
Liu Y K.2004.Research on the influence factors in strnegth and th constitutive relationship of the lime-loess[D].Xi'an:Xi'an University of Architecture and Technology.
Qian H J,Xu G Z,Luo Y S,et al.1985.Collapsed loess foundation[M]Beijing:China Architecture and Building Press:5~8.
Weng X L,Wang W,Lin B J.2011.Model test on deformation characteristics of widening collapsible loess roadbed and dynami compaction method treatment effect[J].China Journal of Highwa and Transport,24(2):17~22.
Yang X H,Hang X F,Zhu Y P,et al.2014.Experimental study on collapsibility evaluation and treatment depths of collapsible loes upon self weight with thick depth[J].Chinese Journal of Rock Mechanics and Engineering,33(5):1063~1074.
Yu D S.2005.The Experimental study and numeical simulation of th collapse loss ground impeoved with dynamic consolidation method[D].Beijing:University of Science and Technology Beijing
Zhang Z Q,Jin J,Fu H B.2007.Physical-mechanical property study o subsidability for loess roadbed[J].Journal of Highway and Transportation Research and Development,24(7):48~51.
龚晓南,杨鸿贵,刘存利,等.2008.地基处理手册(第三版)[M].北京:中国建筑工业出版社:166~169.
郭婷婷,张伯平,田志高,等.2004.黄土二灰土工程特性研究[J].岩土工程学报,26(5):721~729.
黄雪峰,陈正汉,方祥位,等.2007.大厚度自重湿陷性黄土地基处理厚度与处理方法研究[J].岩石力学与工程学报,26(S2):4332~4338.
黄雪峰,张广平,姚志华,等.2011.大厚度自重湿陷性黄土湿陷变形特性水分入渗规律及地基处理方法研究[J].岩土力学,32(S2):100~108.
柳墩利.2012.高速铁路湿陷性黄土地基处理试验研究[D].北京:中国铁道科学研究院.
刘有科.2004.灰土强度影响因素及其本构关系的研究[D].西安:西安建筑科技大学.
钱鸿缙,涂光祉,罗宇生,等.1985.湿陷性黄土地基[M].北京:中国建筑工业出版社:5~8.
翁效林,王玮,刘保健.2011.湿陷性黄土拓宽路基变形特性及强夯法处治效应模型试验[J].中国公路学报,24(2):17~22.
杨校辉,黄雪峰,朱彦鹏,等.2014.大厚度自重湿陷性黄土地基处理深度和湿陷性评价试验研究[J].岩石力学与工程学报,33(5):1063~1074.
于德水.2005.强夯法处理湿陷性黄土路基的试验研究及数值模拟[D].北京:北京科技大学.
张志清,金江,傅海滨.2007.湿陷性黄土路基物理力学性质试验研究[J].公路交通科技,24(7):48~51.
Guo T T,Zhang B P,Tian Z G,et al.2004.Study on engineerin characteristic of lime-flyash loess[J].Chinese Journal o Geotechnical Engineering,26(5):721~729.
Huang X F,Chen Z H,Fang X W,et al.2007.Study on foundation treatment thickness and treatment method for collapse loess with large thickness[J].Chinese Journal of Rock Mechanics and Engineering,26(S2):4332~4338.
Huang X F,Zhang G P,Yao Z H,et al.2011.Research on deformation permeability regularity and foundation treatment method of deadweight collapse loess with heavy section[J].Rock and Soi Mechanics,32(S2):100~108.
Liu D L.2012.Experimental study on collapsible loess foundation treatment for high-speed railway[D].Beijing:China Academy o Railway Science.
Liu Y K.2004.Research on the influence factors in strnegth and th constitutive relationship of the lime-loess[D].Xi'an:Xi'an University of Architecture and Technology.
Qian H J,Xu G Z,Luo Y S,et al.1985.Collapsed loess foundation[M]Beijing:China Architecture and Building Press:5~8.
Weng X L,Wang W,Lin B J.2011.Model test on deformation characteristics of widening collapsible loess roadbed and dynami compaction method treatment effect[J].China Journal of Highwa and Transport,24(2):17~22.
Yang X H,Hang X F,Zhu Y P,et al.2014.Experimental study on collapsibility evaluation and treatment depths of collapsible loes upon self weight with thick depth[J].Chinese Journal of Rock Mechanics and Engineering,33(5):1063~1074.
Yu D S.2005.The Experimental study and numeical simulation of th collapse loss ground impeoved with dynamic consolidation method[D].Beijing:University of Science and Technology Beijing
Zhang Z Q,Jin J,Fu H B.2007.Physical-mechanical property study o subsidability for loess roadbed[J].Journal of Highway and Transportation Research and Development,24(7):48~51.
龚晓南,杨鸿贵,刘存利,等.2008.地基处理手册(第三版)[M].北京:中国建筑工业出版社:166~169.
郭婷婷,张伯平,田志高,等.2004.黄土二灰土工程特性研究[J].岩土工程学报,26(5):721~729.
黄雪峰,陈正汉,方祥位,等.2007.大厚度自重湿陷性黄土地基处理厚度与处理方法研究[J].岩石力学与工程学报,26(S2):4332~4338.
黄雪峰,张广平,姚志华,等.2011.大厚度自重湿陷性黄土湿陷变形特性水分入渗规律及地基处理方法研究[J].岩土力学,32(S2):100~108.
柳墩利.2012.高速铁路湿陷性黄土地基处理试验研究[D].北京:中国铁道科学研究院.
刘有科.2004.灰土强度影响因素及其本构关系的研究[D].西安:西安建筑科技大学.
钱鸿缙,涂光祉,罗宇生,等.1985.湿陷性黄土地基[M].北京:中国建筑工业出版社:5~8.
翁效林,王玮,刘保健.2011.湿陷性黄土拓宽路基变形特性及强夯法处治效应模型试验[J].中国公路学报,24(2):17~22.
杨校辉,黄雪峰,朱彦鹏,等.2014.大厚度自重湿陷性黄土地基处理深度和湿陷性评价试验研究[J].岩石力学与工程学报,33(5):1063~1074.
于德水.2005.强夯法处理湿陷性黄土路基的试验研究及数值模拟[D].北京:北京科技大学.
张志清,金江,傅海滨.2007.湿陷性黄土路基物理力学性质试验研究[J].公路交通科技,24(7):48~51.