A Study on Multi-level Collapsibility of Loess at Microscale

ZHANG Xiaozhou; Lu Yudong; Guo Wen; LI Xin; Liang Shaohuan

doi:10.13961/j.cnki.stbctb.2019.06.025

您当前的位置：

首页 >

文章列表页 >

A Study on Multi-level Collapsibility of Loess at Microscale

- A Study on Multi-level Collapsibility of Loess at Microscale
- Bulletin of Soiland Water Conservation Vol. 39, Issue 6, Pages: 170-175(2019)
- 作者机构：
  
  1. 长安大学环境科学与工程学院,陕西,西安,710054
  2. 旱区地下水文与生态效应教育部重点实验室,陕西,西安,710054
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2019.06.025
  CLC：
- Published：2019
- 稿件说明：
移动端阅览
ZHANG Xiaozhou, Lu Yudong, Guo Wen, et al. A Study on Multi-level Collapsibility of Loess at Microscale[J]. Bulletin of Soiland Water Conservation, 2019, 39(6): 170-175.
DOI：

ZHANG Xiaozhou, Lu Yudong, Guo Wen, et al. A Study on Multi-level Collapsibility of Loess at Microscale[J]. Bulletin of Soiland Water Conservation, 2019, 39(6): 170-175. DOI： 10.13961/j.cnki.stbctb.2019.06.025.

摘要

[目的] 验证黄土多级湿陷性以及探究微观尺度下黄土的湿陷变形方式，为黄土的湿陷变形机理研究提供科学依据。[方法] 分别设计、实施了室内循环加水湿陷试验和相同样品增湿前后微观结构观察试验，并分别对湿陷数据与扫描电镜影像进行分析和对比。[结果] 湿陷数据表明，在黄土达到一次湿陷稳定以及去水稳定后，在装置内再次加水会导致试样再次发生明显形变，而黄土的微观结构在湿陷过程中发生了溶解、移动、重组三种变形方式。[结论] 黄土结构这种破坏—重组—破坏的动态循环过程是黄土能够发生多级湿陷的内在原因。

Abstract

[Objective] The multi-level collapsibility of loess was investigated and the way of loess collapsibility deformation was studied at the microscale in order to provide a scientific basis for the study of loess collapsible deformation mechanism.[Methods] We designed and conducted a indoor cyclic collapsibility test

to observe the micro-structure of the same samples under repeated humidification and dehumidification processes. The collapsibility data were analyzed and the scanning electron microscopy images were compared.[Results] The collapsibility data showed that after the loess reached the first collapsibility and water removal stability

adding water into the device would cause the deformation of the sample again. During the collapsibility process

the micro-structure undergone three deformation modes:dissolution

movement and reconstruction.[Conclusion] It is the dynamic process of destruction-reconstruction-destruction of loess structure that leads to multi-level collapsibility of loess.

关键词

Keywords

references

Tovey N K, Dent D L, Corbett W M, et al. Quantitative micro-mineralogy and micro-fabric of soils and sediments[J]. Developments in Soil Science, 1993,22:541-547.

Tovey N K, Krinsley D H. Mapping of the orientation of fine-grained minerals in soils and sediments[J]. Bulletin of the International Association of engineering Geology, 1992,46:93-101.

Tovey N K, Smart P, Hounslow M W, et al. Automatic orientation mapping of some types of soil fabric[J]. Geoderma, 1992,53(3):179-200.

高国瑞.兰州黄土显微结构和湿陷机理的探讨[J].兰州大学学报,1979,15(02):123-134.

高国瑞.黄土湿陷变形的结构理论[J].岩土工程学报,1990,12(4):1-10.

雷祥义.西安黄土显微结构类型[J].西北大学学报:自然科学版,1983,(4):56-65,127-132.

雷祥义.中国黄土的孔隙类型与湿陷性[J].中国科学(B辑):化学生物学农学医学地学,1987,17(12):1309-1318.

胡再强,沈珠江,谢定义.非饱和黄土的显微结构与湿陷性[J].水利水运科学研究,2000(2):68-71.

王常明,林容,陈多才,等.辽西黄土湿陷变形特性及湿陷后微观结构变化[J].吉林大学学报:地球科学版,2011,41(2):471-477.

Li Xian, Li Licui, Song Yanxun, et al. Characterization of the mechanisms underlying loess collapsibility for land-creation project in Shaanxi Province, China:A study from a micro perspective[J]. Engineering Geology, 2019,249:77-88.

Li Xian, Li Lincui. Quantification of the pore structures of Malan loess and the effects on loess permeability and environmental significance, Shaanxi Province, China:An experimental study[J]. Environmental Earth Sciences, 2017,76(15):523.

郭泽泽,李喜安,陈阳,等.基于SEM-EDS的湿陷性黄土黏土矿物定量分析[J].工程地质学报,2016,24(5):899-906.

Galván Josa V, Castellano G, Bertolino S R. Quantification by SEM-EDS in uncoated non-conducting samples[J]. Radiation Physics and Chemistry, 2013,88:32-37.

卢玉东,孙建中.黄土的多级湿陷性研究[J].煤田地质与勘探,2005,33(4):63-65.

孙建中,刘健民.黄土的未饱和湿陷、剩余湿陷和多次湿陷[J].岩土工程学报,2000,22(3):365-367.

姚志华,黄雪峰,陈正汉,等.关于黄土湿陷性评价和剩余湿陷量的新认识[J].岩土力学,2014,35(4):998-1006.

张晓周,卢玉东,李鑫,等.增湿条件下泾阳南塬马兰黄土孔隙率变化研究[J].干旱区资源与环境,2019,33(6):99-104.

Zhang Xiaozhou, Lu Yudong, Li Xin, et al. Microscopic structure changes of Malan loess after humidification in South Jingyang Plateau, China[J]. Environmental Earth Sciences, 2019,78:DOI:10.1007/s12665-019-8290-4.

曾国红,孟宪,裘以惠.关于黄土湿陷起始压力、湿陷起始含水量的探讨[J].太原工业大学学报,1997,28(S1):20-23,121-122.

郑建国,张苏民.黄土的湿陷起始压力和起始含水量[J].工程勘察,1989,17(2):6-10.

涂光祉.湿陷性黄土的起始含水量[J].工程勘察,1987,15(3):24-26.

王常明,林容,陈多才,等.辽西黄土湿陷变形特性及湿陷后微观结构变化[J].吉林大学学报:地球科学版,2011,41(2):471-477.

Views

1079

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Spatiotemporal heterogeneity of ecosystem service value in typical estuarine deltas of China

Spatiotemporal evolution and influencing mechanisms of coupling coordination of carbon reduction-pollution reduction-green expansion-economic growth in urban agglomeration in middle reaches of Yangtze River

Impacts of climate， land use and ecological governance on water ecosystem services in Haihe River basin

Runoff and sediment yield characteristics of typical soil slopes in Xin’an River basin under different rainfall intensities and slope gradients

Spatiotemporal evolution and prediction of coupling coordination development of county scal ecological-economic-social systems in Xizang

Related Author

No data

Related Institution

No data

⁰