[1]张磊,徐则民,张露月,等.植被发育斜坡土体物理力学特性[J].山地学报,2015,(02):240.
　ZHANG Lei,XU Zemin,ZHANG Luyue,et al.Physicaland Mechanical Properties of Well Vegetated Slope Soils[J].Mountain Research,2015,(02):240.
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植被发育斜坡土体物理力学特性()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2015年02期
页码:
240
栏目:
山地灾害
出版日期:
2015-04-01

文章信息/Info

Title:
Physicaland Mechanical Properties of Well Vegetated Slope Soils
作者:
张磊;徐则民;张露月;张燕廷;侯汝几;
昆明理工大学地球科学系;昆明理工大学土木系;
Author(s):
ZHANG Lei;  XU Zemin;  ZHANG Luyue; ZHANG Yanting;  HOU Ruji
1.Department of Earth Science, Kunming University of Science and Technology, Kunming 650093, China; 2.Department of Civil Engineering, Kunming University of Science and Technology, Kunming 650500, China
关键词:
植被发育斜坡; 滑坡; 物理力学特性; 有机质
Keywords:
well vegetated slopes;  landslide;  physical and mechanical properties;  organic matter
分类号:
P642.1,TU41
文献标志码:
A
摘要:
头寨植被发育斜坡土体具有高含水率、大孔隙比、富含有机质等类似软土的基本物理性质。然而,与不同沉积相软土的压缩性对比,头寨土e-lgp曲线没有明显的结构屈服强度,e-p曲线不适用双曲线模型,也没有"倒大"的现象,压缩模量极小且有随深度递增的规律。头寨土剪应力-剪切位移曲线普遍无峰值,属于土样应变硬化的情况,年最低含水率>100%、平均>150%的超高含水率,使得土体具有极强的延性和变形性能。利用Image J对团聚体SEM照片分析表明,团粒的圆形度平均65%、复杂度平均42%、各向异性率平均25%,主定向角在0~360°之间变化,具有很好的"支架"结构,但团粒的"支架"作用并未体现。高含水率及团...
Abstract:
Ona well vegetated Slope of Touzhai in Zhuotong of Yunnan,China,the basic physical characteristics of the soil arehigh moisture content、largeporosity，rich organic matters, which is similarly to natural soft clays, butthecompression characteristicsis different thanvarious phasesoft clays, structural yield strength of the soil from Touzhai is not obvious, the hyperbola modelis not suitable for its stressstrain curve, and former coefficient of compressibility can’t be less than the succeeding,its compressibility modulus is minimal and increasewith the increasing of depth.There is no peak on the curve of shear stressshear displacement of Touzhai soils，the situationbelongs tosoil samples’ strain hardening，Ultrahigh moisture content makes the soils have a very strong ductile and deformation properties. Trough analyzing SEM photos by ImageJ, it is show that the circularity of soil aggregate is 65%,the complexity is 42%,the degrees of anisotropy is 25%,the main orientation angle is 0～360°, it has a good “skeleton” structure,but the strength of soil “skeleton” is not borne out.Annualminimummoisture content is greater than 100%、mean annualmoisture content is greater than 150%,the high moisture content and moisture contentproperties decide that the porewater pressure play a dual function role in compression process of soil from Touzhai that the pores connectivity of soil increase with pressresistance increasing,it iscompression easier with a larger load.

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备注/Memo

备注/Memo:
收稿日期(Received date)：2014-06-09；改回日期(Accepted)：2014-10-09。
基金项目(Foundation item)：国家自然科学基金-云南联合基金重点项目（U1033601），高等学校博士学科点专项科研基金（20135314110005）。[The National Natural Science Foundation of China-Yunnan Joint Fund and Research Fund for the Doctoral Program of Higher Education of China.]
作者简介（Biography）：张磊(1987-)，男，陕西宝鸡人，硕士研究生，主要从事水文地质与工程地质方面研究。[Zhang Lei (1987-),male, graduate candidate,majoring in hydrogeology and engineering geology research.] E-mail:zlzb5201@126.com *
通信作者(Corresponding author)：徐则民(1963-)，教授，博士生导师，E-mail:abc5100 @188.com
更新日期/Last Update: 1900-01-01