| 原状黄土的结构性及其与变形特性关系研究 |
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| 引用本文： | 陈存礼,胡再强,高鹏.原状黄土的结构性及其与变形特性关系研究[J].岩土力学,2006,27(11):1891-1896. |
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| 作者姓名： | 陈存礼 胡再强 高鹏 |
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| 作者单位： | 1. 西安理工大学,岩土工程研究所,西安,710048
2. 核工业工程勘察院,郑州,450022 |
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| 摘 要： | 在不同含水率下对兰州、西安原状黄土进行压缩试验，根据同一压力下原状、重塑及饱和黄土的孔隙比定义了一个定量结构性参数，探讨了结构性参数随压力及含水率变化的规律性。研究表明：（1）用结构性参数随含水牢及压力变化特性来研究结构性对原状黄土的压缩性、湿陷性的影响可以得到良好的规律性。（2）同一含水率下结构性参数在压力未达到结构强度以前，随压力的增大而增大；达到结构强度之后，压力增大使结构性参数明显减小或缓慢增大。（3）同一压力下结构性参数在含水率未达到结构破坏起始含水率甜之前降低很小；达到甜之后，含水率增大，使结构性参数快速减小。甜随压力的增大而减小，高压力处含水率变化对结构性参数有显著影响。（4）两地黄土在不同压力或含水率下湿陷系数与结构性参数mp关系可以归一为一条直线，即湿陷系数受结构性影响的规律是相同的。
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| 关 键 词： | 原状黄土 含水率 压缩试验 结构性 湿陷性 压缩性 结构性参数 |
| 文章编号： | 1000-7598-（2006）11-1891-06 |
| 收稿时间： | 2005-01-15 |
| 修稿时间： | 2005-07-28 |
Research on relationship between structure and deformation property of intact loess |
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| CHEN Cun-li,HU Zai-qiang,GAO Peng.Research on relationship between structure and deformation property of intact loess[J].Rock and Soil Mechanics,2006,27(11):1891-1896. |
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| Authors: | CHEN Cun-li HU Zai-qiang GAO Peng |
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| Institution: | 1.Institute of Geotechnical Engineering, Xi’an University of Technology, Xi’an 710048, China； 2.Geotechnical Investigation And Surveying Institute of Nuclear Industry, Zhengzhou 450022,China |
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| Abstract: | The compression tests are conducted on Lanzhou and Xi’an intact loess under different water contents. The quantitative comprehensive structural parameter is defined by using void ratio of intact, disturbed and saturated loess. The effects of water content and pressure on the structural parameter are investigated. The study indicates. (1) The better relationship between deformation characteristics (compressibility and collapsibility) and structure can be obtained by using the variation characteristics of the structural parameter of intact loess with the change of water content and pressure. (2) Under the same water content, the structure parameter increases with the increase of pressure before structure strength; and it decreases or scarcely increases after it. (3) Under the same pressure, the structure parameter scarcely decreases with the increase of water content before the initial structure destruction water content ?f; and it apparently decreases after it. ?f decreases with the increase of pressure. The change of water content has obvious effect on the structure parameter.(4) The relationship between coefficient of collapsibility and the structural parameter almost is the same line for intact loess in two regions under different pressures and water contents. |
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| Keywords: | intact loess water content compression test structure collapsibility compressibility structural parameter |
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