非饱和填土(黄土)的湿化变形研究

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (220 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要为探讨非饱和路堤填土湿化变形规律，应用非饱和土三轴仪，对干密度为1.7和1.8 g/cm3的重塑黄土进行24组剪切试验，控制净室压力为50，100和200 kPa，控制吸力为0，50，100和200 kPa。采用2种简化的模型和双线法分析湿化变形，给出应用线性简化模型和双曲线模型计算湿化变形的公式，并确定公式中的参数取值。通过分析2种模型计算的湿化变形发现，干密度对湿化变形影响很大，因此提高路基压实度可以有效地控制湿化变形。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章

关键词 ：土力学, 非饱和填土, 控制吸力和净围压的三轴剪切试验, 湿化变形, 双线法, 简化模型

Abstract：24 groups of shear tests on remolded loess are conducted by using triaxial apparatus for unsaturated soils to study the wetting deformation laws of unsaturated embankment fill. The dry densities of specimens are 1.7 and 1.8 g/cm3，respectively；the cell pressures are chosen as 50，100 and 200 kPa；and the control suctions are chosen as 0，50，100 and 200 kPa. Based on the above，two simplified models and double-line method are used in the analysis of wetting deformation；and formulae for calculating the wetting deformation using the two models mentioned above and values of relevant parameters are proposed. Through the analysis，it is shown that the wetting deformation are greatly influenced by the dry density；and the wetting deformation could be effectively controlled through the enhancement of compaction of the roadbed.

Key words： soil mechanics unsaturated fill triaxial shear tests with controlled suction and cell pressure wetting deformation double-line method simplified models

收稿日期: 2011-03-17

引用本文:

关亮1，2，陈正汉1，黄雪峰1，孙树国1，方祥位1. 非饱和填土(黄土)的湿化变形研究[J]. 岩石力学与工程学报, 2011, 30(8): 1698-1704.
GUAN Liang1，2，CHEN Zhenghan1，HUANG Xuefeng1，SUN Shuguo1，FANG Xiangwei1. STUDY OF WETTING DEFORMATION OF UNSATURATED REMOLDED LOESS. , 2011, 30(8): 1698-1704.

链接本文:

http://www.rockmech.org/CN/Y2011/V30/I8/1698

[4]	陈正汉，周海清，FREDLUND D G. 非饱和土的非线性模型及其应用[J]. 岩土工程学报，1999，21(5)：603-608.(CHEN Zhenghan，ZHOU Haiqing，FREDLUND D G. Nonlinear model for unsaturated soils and its application[J]. Chinese Journal of Geotechnical Engineering，1999，21(5)：603-608.(in Chinese))
[8]	黄文熙. 土的工程性质[M]. 北京：水利电力出版社，1983：15-18.(HUANG Wenxi. Engineering properties of soil[M]. Beijing：Water Resources and Electric Power Press，1983：15-18.(in Chinese)) " target="_blank">
[12]	GEORGIADIS K，POTTS D M，ZDRAVKOVIC L. The influence of partial soil saturation on pile behaviour[J]. Geotechnique，2003，53(1)：11-25. " target="_blank">
[1]	陈正汉. 非饱和土与特殊土的工程特性和力学理论及其应用研究[C]// 第十届土力学及岩土工程学术会议论文集. 重庆：重庆大学出版社，2007：172-194.(CHEN Zhenghan. The engineering characters，mechanical theory and application of unsaturated and special soils[C]//. Proceedings of the 10th Conference on Soil Mechanics and Geotechnical Engineering. Chongqing：Chongqing University Press，2007：172-194.(in Chinese)) " target="_blank">
[5]	陈正汉，周海清. 非饱和压实黄土的本构关系研究[J]. 西部探矿工程，1996，11(8)：l-6.(CHEN Zhenghan，ZHOU Haiqing. Research on constitutive relationship of unsaturated compacted loess[J]. West- China Exploration Engineering，1996，11(8)：l-6.(in Chinese)) " target="_blank">
[9]	杨代泉. 非饱和土广义固结理论及其数值模拟与试验研究[博士学位论文][D]. 南京：南京水利科学研究院，1990.(YANG Daiquan. General consolidation theory of unsaturated soils and numerical simulation as well as test research[Ph. D. Thesis][D]. Nanjing：Nanjing Hydraulic Research Institute，1990.(in Chinese)) " target="_blank">
[13]	谢定义. 试论我国黄土力学研究中的若干新趋向[J]. 岩土工程学报，2001，23(1)：3-13.(XIE Dingyi. Exploration of some new tendencies in research of loess soil mechanics[J]. Chinese Journal of Geotechnical Engineering，2001，23(1)：3-13.(in Chinese))
[2]	李广信. 堆石料的湿化试验和数学模型[J]. 岩土工程学报，1990，12(5)：58-64.(LI Guangxin. Wetting test and math model of the moraine[J]. Chinese Journal of Geotechnical Engineering，1990，12(5)：58-64.(in Chinese))
[3]	殷宗泽，赵航. 土坝浸水变形分析[J]. 岩土工程学报：1990，12(2)：1-8.(YIN Zongze，ZHAO Hang. Analyzing wetting distortion of the soil dam[J]. Chinese Journal of Geotechnical Engineering，1990，12(2)：1-8.(in Chinese))
[6]	FREDLUND D G，RAHADJO H．Soil mechanics for unsaturated soils[M]. New York：John Wiley and Sons Inc.，l993. " target="_blank">
[7]	ALONSO E E，GENS A，JOSA A. A Constitutive model for partially saturated soils[J]. Geotechnique，1990，40(3)：405-430. " target="_blank">
[10]	陈正汉. 非饱和土三轴仪与重塑土制样设备的研制[R]. 重庆：后勤工程学院，1994.(CHEN Zhenghan. Development of triaxial apparatus for unsaturated soils and equipment for preparing specimen[R]. Chongqing：Logistical Engineering University，l994.(in Chinese)) " target="_blank">
[11]	陈正汉. 多功能土工三轴仪的研制[R].重庆：后勤工程学院，2004. (CHEN Zhenghan. Development of multi-function triaxial apparatus[R]. Chongqing：Logistical Engineering University，2004.(in Chinese)) " target="_blank">
[14]	PANDIAN N S，NAGARAJ T S，KUMAR S，et al. Generalized state parameter for partly saturated soil[J]. Journal of Geotechnical and Geoenvironmental Engineering，1992，118(4)：622-627. " target="_blank">
[15]	陈正汉. 重塑非饱和黄土的变形、强度、屈服和水量变化特性[J]. 岩土工程学报，1999，21(1)：82-90.(CHEN Zhenghan. Deformation，strength，yield and moisture change of a remoulded unsaturated loess[J]. Chinese Journal of Geotechnical Engineering，1999，21(1)：82-90.(in Chinese)) " target="_blank">