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...

离心模型试验预测中等压缩性土地基沉降的可行性

, PP. 17-23

Keywords: 中等压缩性土,地基沉降,路基填筑,离心模型试验,现场填筑试验

Full-Text   Cite this paper   Add to My Lib

Abstract:

应用TLJ-2型土工离心试验机,采用停机加载法与变加速度加载法,研究了海南东环客运专线和胶济客运专线中等压缩性土地基的沉降特性,并与现场填筑试验结果进行了对比,分析了应用离心模型试验方法预测原型地基沉降的主要影响因素与预测精度。研究结果表明采用2种离心模型试验方法所得地基沉降比现场填筑试验值大,且随着地基深度增大,沉降修正系数减小,沉降差异增大;在现场填筑试验中,地基表层6.0m范围内产生的沉降占地基总沉降的比例大于45%,而离心模型试验的比例小于20%;2种离心模型试验方法产生的地基沉降具有相似的沉降特性,路基填筑期完成的沉降占总沉降比例相同,均为88%,但采用停机加载法产生的地基沉降比变加速度法大1倍左右。可见,采用2种离心模型试验方法均较难预测原型中等压缩性土地基的沉降,但可进行定性分析。

References

[1]  谢永利,潘秋元,曾国熙.应用离心模型试验研究软基变形性状[J].岩土工程学报,1995,17(4):45-50. XIE Yong-li, PAN Qiu-yuan, ZENG Guo-xi. Study on deformation behavior of soft clay ground with centrifugal model test [J]. Chinese Journal of Geotechnical Engineering, 1995, 17(4): 45-50.(in Chinese)
[2]  章为民,徐光明.土石坝填筑过程的离心模拟方法[J].水利学报,1997(2):8-13. ZHANG Wei-min, XU Guang-ming. Study on modeling the construction process of embankment dams in centrifugal test[J]. Journal of Hydraulic Engineering, 1997(2): 8-13.(in Chinese)
[3]  丁金华,包承纲.软基和吹填土上加筋堤的离心模型试验及有限元分析[J].土木工程学报,1999,32(1):21-25. DING Jin-hua, BAO Cheng-gang. Centrifugal model test and finite element analysis of geosynthetic reinforced embankments on soft ground and dredger fill[J]. China Civil Engin-eering Journal, 1999, 32(1): 21-25.(in Chinese)
[4]  陈胜立,张丙印,张建民,等.软基上加筋防波堤的离心模型试验[J].岩石力学与工程学报,2005,24(15):2751-2756. CHEN Sheng-li, ZHANG Bing-yin, ZHANG Jian-min, et al. Centrifugal modeling of reinforced embankments on soft clay[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(15): 2751-2756.(in Chinese)
[5]  卢国胜,蒋昌贵,王 迅.搅拌桩处理软土地基的离心机试验研究[J].岩土力学,2007,28(10):2101-2105. LU Guo-sheng, JIANG Chang-gui, WANG Xun. Centrifuge experiment study on mixing pile improving soft foundation[J]. Rock and Soil Mechanics, 2007, 28(10): 2101-2105.(in Chinese)
[6]  WANG Chang-dan, WANG Bing-long, WANG Xu, et al. Centrifugal model tests on settlement controlling of piled embankment in high speed railway[C]∥MAO Bao-hua, TIAN Zong-zhou, HUANG Hai-jun, et al. Traffic and Transportation Studies(ICTTS2010). Kunming: ASCE, 2010: 1407-1416.
[7]  BASSETT R H, HORNER J. Prototype deformations from centrifugal model tests[C]∥TELFORD T. Proceedings of the 7th European Conference on Soil Mechanics and Foundation Engineering. Brighton: Springerlink, 1979: 1-9.
[8]  DAVIES M C R, PARRY R H G. Centrifuge modelling of embankments on clay foundations[J]. Soils and Foundations, 1985, 25(4): 19-36.
[9]  SHARMA J S, BOLTON M D. Finite element analysis of centrifuge tests on reinforced embankments on soft clay[J]. Computers and Geotechnics, 1996, 19(1): 1-22.
[10]  ALLERSMA H G B, LEE S W, LEE Y N. Centrifuge model-ing of embankment construction by the dumping method on soft soil[C]∥HANSON J L, TERMAAT R J. Soft Ground Technology. Noordwijkerhout: ASCE, 2000: 423-434.
[11]  王景芝,李安洪,肖红兵,等.饱和全风化花岗岩地基土压缩特性的研究[J].铁道建筑,2009(6):73-76. WANG Jing-zhi, LI An-hong, XIAO Hong-bing, et al. Study of compression characteristics of saturated completely decomposed granite foundation[J]. Railway Engineering, 2009(6): 73-76.(in Chinese)
[12]  吴丽君,蒋关鲁,李安洪,等.非饱和粉质粘土固结压缩特性及体变试验研究[J].现代地质,2009,23(3):559-563. WU Li-jun, JIANG Guan-lu, LI An-hong, et al. Consoli-dation and compressibility of unsaturated silt clay and test study on volume change[J]. Geoscience, 2009, 23(3): 559-563.(in Chinese)

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133