[1]蔡东艳,邵生俊,王桃桃.黄土的三轴剪切吸力变化特性与结构性的分析[J].西安建筑科技大学学报:自然科学版,2014,46(01):76-83.[doi:10.15986/j.1006-7930.2014.01.014]
　CAI DongyanSHAO ShengjunWANG Taotao.Analysis on structure and suction property of loess under tri-axial compression[J].J.Xi’an Univ. of Arch. & Tech.:Natural Science Edition,2014,46(01):76-83.[doi:10.15986/j.1006-7930.2014.01.014]
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黄土的三轴剪切吸力变化特性与结构性的分析()
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西安建筑科技大学学报:自然科学版[ISSN:1006-7930/CN:61-1295/TU]

卷:
46
期数:
2014年01期
页码:
76-83
栏目:
出版日期:
2014-02-28

文章信息/Info

Title:
Analysis on structure and suction property of loess under tri-axial compression
文章编号:
1006-7930(2014)01-0076-08
作者:
蔡东艳1; 邵生俊2; 王桃桃2
(1. 西安建筑科技大学土木工程学院,陕西 西安 710055;2. 西安理工大学岩土工程研究所,陕西 西安 710048)
Author(s):
CAI Dongyan1SHAO Shengjun2WANG Taotao2
(1. School of Civil Engineering, Xi’an Univ. of Arch. & Tech., Xi’an 710055, China; 2. Institute of Geotechnical Engineering, Xian University of TechnologyXi’an 710055, China;)
关键词:
黄土; 结构性; 黄土强度; 吸力作用; 结构性参数
Keywords:
unsaturated loess;  structural properties;  strength of loess;  suction;  structural parameters
分类号:
TU411
DOI:
10.15986/j.1006-7930.2014.01.014
文献标志码:
A
摘要:
黄土的结构性与其骨架中存在的吸力作用有密切关系，吸力作用提高了土骨架的结构稳定性．黄土表现出的结构性不仅仅与其内在吸力作用有关，而且与土骨架中存在的胶结作用相关．本文通过原状黄土、重塑土的非饱和三轴试验，揭示了它们的基质吸力随着剪切变形的发展规律，以及原状黄土应力结构性参数随剪切变形的变化规律．表明原状黄土较重塑土的基质吸力小，但其抗剪切能力较大，它的结构性在较低应变条件即发挥到了峰值．随着剪切变形发展，黄土的结构性逐渐衰减，而其基质吸力却不断增长．非饱和黄土的基质吸力对其抗剪强度有增强作用，但不能反映黄土的结构性．结构性参数及其变化能明确地反映黄土的结构性演变．
Abstract:
The structural property of loess is related to the suction of its fabric, which improves the stability of soil structure. The shear strength of loess increases with suction and cementation of particles of loess, which can’t be reflected by suction of unsaturated soils. The changing laws of suction and stress structural parameter with shear strain are analyzed by the triaxial tests of unsaturated intact and remolded loess. The structural property of loess reveals the peak value in the low strain condition, and after that, along with the development of the shearing deformation, the loess structural property weakens gradually. The suction is growing unceasingly with the development of the shearing deformation. The suction of intact loess is smaller than the remolded loess. Comparing structural parameter with the suction of loess, the structure effect weakens with shearing deformation and the suction growing unceasingly. Furthermore, the structural property of loess is one of the important mechanical properties. The suction of unsaturated soil reinforces the shear strength of soil particles structure, but it can ’t reflect the loess’s structural property. The structural parameters can reflect the change of loess structure.

参考文献/References:

[1] 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.

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SHEN Zhujiang Binary medium model for loess[J]. Journal of Hydraulic Engineering, 1996, 18 (1) : 95-97.

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XIE Dingyi, QI Jilin. Soil structural characteristics and new approach in research on its Quantitative parameter[J]. Chinese Journal of Geotechnical Engineering, 1999, 21(6): 651-656.

[4] 邵生俊, 周飞飞, 龙吉勇. 原状黄土结构性及其定量化参数研究[J]. 岩土工程学报, 2004, 26(4): 531-536.

SHAO Shengjun, ZHOU Feifei, LONG Jiyong. Structural properties of loess and its quantitative parameter[J]. Chinese Journal of Geotechnical Engineering, 2004, 26(4): 531-536.

[5] 邵生俊, 龙吉勇, 于清高, 等. 湿陷性黄土结构性变形特性分析[J]. 岩土力学, 2006, 27(10): 1668-1672.

SHAO Shengjun, LONG Jiyong, YU Qinggao, et al. A Constitutive model of collapse loess with its structural parameter[J]. Rock and Soil Mechanics, 2006, 27(10): 1668-1672.

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备注/Memo

备注/Memo:
基金项目：国家自然科学基金项目(50779054; 10872161)
收稿日期：2013-07-11 修改稿日期：2014-01-25
作者简介：蔡东艳（1961-），女，硕士，高级工程师，主要从事黄土力学方面的研究．E-mail：psw_tea@163.com
更新日期/Last Update: 2015-10-05