全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

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

, PP. 17-22

Keywords: 道路工程,湿陷性黄土,模型试验,拓宽路基,增湿破坏,强夯处治

Full-Text   Cite this paper   Add to My Lib

Abstract:

?为揭示湿陷性黄土地区过湿拓宽路基变形破坏机理及强夯法处治效应,研制了离心场土工构造物变形测试系统,升级传感器电测手段,以浸水入渗条件下高速公路拓宽工程为研究载体,建立与实际应力相符的离心试验模型,通过试验得出了浸水增湿后拓宽路基的沉降变形特征和拓宽地基强夯处治效果。结果表明:拓宽路基坡脚处高含水量对拓宽黄土路基稳定性有显著影响,新路基坡脚水分聚集或地基内部水位上升导致黄土地基发生湿陷的条件成熟,在上部拓宽路基荷载的作用下,整个地基会发生整体或局部湿陷,进而引发整个拓宽新老路基脱节滑移;强夯法能很好地改善黄土地基的湿陷性,保证拓宽路基的整体稳定性。

References

[1]  LI Jia-chun,CUI Shi-fu,TIAN Wei-ping.Erosion Characteristic of Road Slope and Test of Soil Disintegration[J].Journal of Chang'an University:Natural Science Edition,2007,27(1):23-26,49.
[2]  JING Hong-jun,ZHANG Bin.Loess Subgrade Strength Law[J].Journal of Traffic and Transportation En-gineering,2004,4(2):14-18.
[3]  沈 波,艾翠玲,徐 岳,等.公路路基压实黄土坡面人工降雨侵蚀试验[J].长安大学学报:自然科学版,2004,24(6):11-14.
[4]  HJORTNAES-PEDERSEN A G I,BROERS H.The Behaviour of Soft Subsoil During Construction of an Embankment and Its Widening[C]//LEUNG C F,LEE F H,TAN T S.Proceedings of the International Conference Centrifuge 94.Rotterdam:Balkema A A,1994:567-574.
[5]  HAN J,AKINS K.Use of Geogrid-reinforced and Pile-supported Earth Structures[C]//ASCE.Proceedings of the International Deep Foundation Congress 2002:an International Perspective on Theory, Design, Construction and Performance.Reston:ASCE,2002:668-679.
[6]  黄琴龙,凌建明,唐伯明,等.新老路基不协调变形模拟试验研究[J].公路交通科技,2004,21(12):18-21.
[7]  吕国仁.旧路基拓宽改建沉降开裂机理及强夯工艺研究[D].济南:山东大学,2008.
[8]  WENG Xiao-lin,LI Lin-tao,ZHANG Liu-jun.Model Experimental Research on Wetting Damage Mech-anism of Widening Loess Roadbed[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(5):1075-1080.
[9]  李家春,崔世富,田伟平.公路边坡降雨侵蚀特征及土的崩解试验[J].长安大学学报:自然科学版,2007,27(1):23-26,49.
[10]  景宏君,张 斌.黄土路基强度规律[J].交通运输工程学报,2004,4(2):14-18.
[11]  SHEN Bo,AI Cui-ling,XU Yue,et al.Corrode Test of Highway Impact Loess Roadbed Slope Surface with Man-made Rainfall[J].Journal of Chang'an Univer-sity:Natural Science Edition,2004,24(6):11-14.
[12]  ALLERSMA H G B,RAVENSWAAY L,VOS E.Investigation of Road Widening on Soft Soils Using a Small Centrifuge[J].Transportation Research Record,1994(1462):47-53.
[13]  HABIB H A A,BRUGMAN M H A,UIJTING B G J.Widening of Road N247 Founded on a Geogrid Reinforced Mattress on Piles[C]//GOURC D J P,GIRARD H.Proceedings of the Seventh International Conference on Geosynthetics.Rotterdam:Balkema A A,2002:369-372.
[14]  HUANG Qin-long,LING Jian-ming,TANG Bo-ming,et al.Experimental Research on Incoordinate Deformation Between Existing Subgrade and the Widening One[J].Journal of Highway and Transportation Research and Development,2004,21(12):18-21.
[15]  LU Guo-ren.Study on the Mechanism of Settlement and Cracking and the Technology of Dynamic Compaction in Old Subgrade Widening and Reconstruction[D].Jinan:Shandong University,2008.
[16]  翁效林,李林涛,张留俊.拓宽黄土路基湿化破坏机制模型试验研究[J].岩石力学与工程学报,2010,29(5):1075-1080.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133