含水率对滑带土强度及变形影响试验研究

›› 2012, Vol. 33 ›› Issue (9): 2613-2618.

含水率对滑带土强度及变形影响试验研究

黄斌^{1, 2, 3}，傅旭东¹，谭凡^{2, 3}，吴忠明^{2, 3}

1.武汉大学土木建筑工程学院，武汉 430072；2.长江科学院土工所，武汉 430010； 3.长江科学院水利部岩土力学与工程重点实验室，武汉 430010

收稿日期:2012-05-07 出版日期:2012-09-11 发布日期:2012-09-12
作者简介:黄斌，男，1981年生，博士研究生，工程师，主要从事特殊土工程性质及土动力方面的研究工作
基金资助:
长江科学院中央级公益性科研院所基金（No. CKSF2013035）；水利部公益性行业科研专项（No. 201201039）资助

Experimental study of relationship between water content and strength or deformation of slip soil

HUANG Bin^{1, 2, 3}, FU Xu-dong¹, TAN Fan^{2, 3}, WU Zhong-ming^{2, 3}

1. School of Civil and Architectural Engineering, Wuhan University, Wuhan 430072, China; 2. Geotechnical Division, Yangtze River Scientific Research Institute, Wuhan 430010, China; 3. Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources, Yangtze River Scientific Research Institute, Wuhan 430010, China

Received:2012-05-07 Online:2012-09-11 Published:2012-09-12

摘要/Abstract

摘要： 为了研究含水率对滑带土强度及变形特性的影响，选取某大型滑坡滑带土进行不同初始饱和度的常规三轴固结排水（气）剪切试验，采用了一种新型气水转换的外体变测试装置来研究非饱和土体变。研究成果表明，含水率对滑带土强度有很大的影响，初始饱和度越高，强度值越低，凝聚力c与饱和度呈阶梯状陡降关系，内摩擦角? 可以与初始饱和度建立线性关系式；含水率越高，土样体变越小，Duncan-Chang模型参数K、Kb、G受含水率影响较大，与初始饱和度呈线性变化关系；n、m、F、Rf、D受含水率的影响较小，不同初始饱和度下的参数值相差不大，可取平均值作为不同饱和度下的模型参数。

关键词: 滑带土, 含水率, 外体变, 强度, 变形

Abstract: In order to study the influence of water content on the strength and deformation of slip soil, select a large scale landslide’s slip soil is selected to conduct consolidated-drained triaxial shear test with different initial saturations. Study the volume strain of unsaturated soils is studied by adopting a new gas and water converting device. The results show that the water content has great influences on the strength of slip soil; the higher the initial saturation is, the lower the strength value is. Strength parameter c with saturation is the ladder-like drop relationship; and linear relation could be established between strength parameters ? and initial saturation. The higher water content is, the smaller the soil sample’s volume deformation is; and the parameters of Duncan-Chang model such as K, Kb, and G are affected largely by water content; and then the linear formula could be established between the initial saturation and these parameters of Duncan-Chang model. But other parameters of Duncan-Chang model such as n, m, F, Rf, and D, which are little affected by water content, have little difference value under different initial saturations, so the averages are made as the model parameters under different saturations.

Key words: slip soil, water content, external volume strain, strength, deformation

中图分类号:

TU 411

黄斌，傅旭东，谭凡，吴忠明 . 含水率对滑带土强度及变形影响试验研究[J]. , 2012, 33(9): 2613-2618.

HUANG Bin , FU Xu-dong , TAN Fan , WU Zhong-ming . Experimental study of relationship between water content and strength or deformation of slip soil[J]. , 2012, 33(9): 2613-2618.

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