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基于孔隙率的延安黄土抗剪强度模型
Shear Strength of Yan'an Loess Interpreted by Porosity

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杨志全 1   丁攀 2   雨德聪 1   杨溢 1 *   朱颖彦 3   韩用顺 4  
文摘 孔隙率对黄土抗剪强度具有非常重要的影响,然而,孔隙率对黄土抗剪强度影响效果的认识并不充分。本文以陕西省延安黄土为研究对象,开展不同孔隙率的黄土直剪试验研究,探讨了孔隙率对粘聚力与内摩擦角的定量变化关系;并以此为基础,构建了基于孔隙率的延安黄土抗剪强度模型,并对其进行了验证。研究结果表明: ( 1)延安黄土粘聚力与孔隙率间呈幂函数变化关系; ( 2)延安不同孔隙率黄土内摩擦角取值呈现出两个区间,当孔隙率n≥0. 4时,其内摩擦角在25 ± 2. 5°的范围内变动,而当孔隙率n < 0. 4时,其内摩擦角在29. 5 ± 2°的范围内变动; ( 3)通过分析得到了基于孔隙率的延安黄土抗剪强度模型,且该模型得到的黄土抗剪强度理论值与实测值间的误差较小,相对误差均在7%以内,具有较高的精确度。研究成果不仅能为延安黄土抗剪强度研究等提供技术支持,而且还能为该地区的工程建设等方面提供理论参考。
其他语种文摘 Porosity has a very important effect on the shear strength of loess. However,the specific effect of porosity on the shear strength of loess is not fully understood. In this paper,the Yan'an loess in Shaanxi Province was taken as research object,and a series of direct shear tests of loess with different porosity were carried out. The quantitative relationship between porosity with internal friction angle as well as cohesive force were carefully discussed. Based on this,a shear strength model of Yan'an loess based on porosity was constructed and verified by comparison with observations. By this research,it found that: ( 1) there was a power function relationship between cohesion and porosity of Yan'an loess; The values of internal friction angles of Yan'an could be defined by two sections in terms of certain porosity. As porosity n≥0. 4,its internal friction angle varied within the range of 252. 5 whereas as porosity n < 0. 4,its internal friction angle changed within the range of 29. 52; ( 3) Through analysis, the Yan'an loess shear strength model based on porosity was obtained,and the errors between theoretical values and measured values of loess shear strength obtained by the model was small,with a relative error lower than 7%, suggesting the high accuracy of the model. The research results can not only provide technical support for the shear strength research of Yan'an loess,but also provide theoretical reference for the engineering construction in this area.
来源 山地学报 ,2019,37(3):392-399 【核心库】
DOI 10.16089/j.cnki.1008-2786.000432
关键词 延安 ; 黄土 ; 孔隙率 ; 粘聚力 ; 内摩擦角 ; 抗剪强度
地址

1. 昆明理工大学公共安全与应急管理学院, 昆明, 650093  

2. 昆明理工大学国土资源工程学院, 昆明, 650093  

3. 中国科学院、水利部成都山地灾害与环境研究所, 成都, 610041  

4. 湖南科技大学资源环境与安全工程学院, 湘潭, 411201

语种 中文
文献类型 研究性论文
ISSN 1008-2786
学科 建筑科学
基金 云南省万人计划“青年拔尖人才”专项 ;  国家自然科学基金联合基金重点项目 ;  国家自然科学基金项目 ;  中国地质调查局西安地质调查中心科研项目
文献收藏号 CSCD:6538623

参考文献 共 25 共2页

1.  李威. 饱和重塑黄土抗剪强度影响因素的试验研究. 工程地质学报,2018,26(3):626-632 被引 6    
2.  李旭东. 延安新区压实黄土抗剪强度试验研究. 河北工程大学学报:自然科学版,2018,35(1):19-23 被引 2    
3.  王林浩. 压实黄土状填土抗剪强度指标的影响因素探讨. 岩土工程学报,2010,32(S2):132-135 被引 12    
4.  邢鲜丽. 黄土抗剪强度与含水率的变化规律. 水文地质工程地质,2014,41(3):53-59,97 被引 34    
5.  王娟娟. 考虑含水量和密度影响的压实黄土抗剪强度特性研究. 西安建筑科技大学学报:自然科学版,2014,46(5):687-691 被引 5    
6.  贾亮. 兰州马兰、离石压实黄土抗剪强度影响因素探讨. 岩土工程学报,2014,36(S2):120-124 被引 6    
7.  邓军涛. 黄土古土壤的抗剪强度特性. 水土保持通报,2015,35(5):319-322 被引 2    
8.  张奎. 含水率和干密度对重塑黄土抗剪强度的影响. 安徽理工大学学报:自然科学版,2016,36(3):74-79 被引 6    
9.  Si Zhongqian. Study on the effect of water content on shearing strength parameters of unsaturated loess. Applied Mechanics and Materials,2014,3489(638):585-588 被引 2    
10.  Li Yanrong. A review of shear and tensile strengths of the Malan Loess in China. Engineering Geology,2018,236(SI):4-10 被引 5    
11.  Luo Y. Laboratory study on shear strength of loess joint. Arabian Journal for Science and Engineering,2014,39(11):7549-7554 被引 2    
12.  慕焕东. 干湿循环对地裂缝带黄土抗剪强度影响研究. 工程地质学报,2018,26(5):1131-1138 被引 9    
13.  Xu Jian. Strength behaviors and meso-structural characters of loess after freeze-thaw. Cold Regions Science and Technology,2018,148:104-120 被引 6    
14.  Wen Baoping. Influence of structure on shear characteristics of the unsaturated loess in Lanzhou,China. Engineering Geology,2014,168(16):46-58 被引 20    
15.  Wen Baoping. Influence of lixiviation by irrigation water on residual shear strength of weathered red mudstone in Northwest China: Implication for its role in landslides'reactivation. Engineering Geology,2012,151:56-63 被引 21    
16.  闫亚景. 可溶盐对兰州非饱和重塑黄土抗剪强度的影响. 岩土力学,2017,38(10):2881-2887 被引 9    
17.  Zhang Fanyu. Undrained shear behavior of loess saturated with different concentrations of Sodium chloride solution. Engineering Geology,2013,155:69-79 被引 4    
18.  Li Rongjian. Characteristics of structural loess strength and preliminary framework for joint strength formula. Water Science and Engineering,2014,7(3):319-330 被引 12    
19.  Zhang Chaobo. Triaxial compression test of soil-root composites to evaluate influence of Roots on soil shear strength. Ecological Engineering,2010,36(1):19-26 被引 7    
20.  Gordana D. The influence of the grain-size distribution and soil structure on the unsaturated shear strength of loess sediments in Belgrade, Central Serbia. Geoloski Anali Balkanskog Poluostrva,2009,2009(70):83-91 被引 1    
引证文献 3

1 周飞 灌溉诱发突发性黄土滑坡机理研究 山地学报,2020,38(1):73-82
被引 2

2 何攀 基于核磁共振技术的结合水含量对重塑黄土抗剪强度影响试验研究 山地学报,2020,38(4):571-580
被引 1

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