[1]宋苗苗,王超,洪振舜,等.盐分浸析对我国海相沉积土物理性质的影响[J].东南大学学报(自然科学版),2015,45(3):591-594.[doi:10.3969/j.issn.1001-0505.2015.03.031]
 Song Miaomiao,Wang Chao,Hong Zhenshun,et al.Effects of salt leaching on physical properties of marine clays in China[J].Journal of Southeast University (Natural Science Edition),2015,45(3):591-594.[doi:10.3969/j.issn.1001-0505.2015.03.031]
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盐分浸析对我国海相沉积土物理性质的影响()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
45
期数:
2015年第3期
页码:
591-594
栏目:
土木工程
出版日期:
2015-05-20

文章信息/Info

Title:
Effects of salt leaching on physical properties of marine clays in China
作者:
宋苗苗王超洪振舜丁建文
东南大学岩土工程研究所, 南京 210096
Author(s):
Song Miaomiao Wang Chao Hong Zhenshun Ding Jianwen
Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, China
关键词:
海相沉积土 盐分浸析 界限含水率 液性指数 活性指数
Keywords:
marine clay salt leaching Atterberg limit liquidity index activity
分类号:
TU43
DOI:
10.3969/j.issn.1001-0505.2015.03.031
摘要:
为了研究盐分浸析对我国海相沉积黏土劣化性状的影响,分别采用NaCl溶液和蒸馏水来改变温州黏土和连云港黏土孔隙水溶液盐分浓度.测定土体的界限含水率、活性指数等物理指标,分析我国海相沉积黏土物理性状随孔隙水溶液盐分浓度的变化规律.研究结果表明,土体液限和活性指数随着孔隙水溶液盐分浓度的降低而减小,塑限几乎不变,液性指数增加.物理性质随孔隙水溶液盐分浓度的变化曲线存在一阀值浓度4.1 g/L;当孔隙水溶液盐分浓度小于4.1 g/L时,液限和活性指数急剧减小,且液限减小率为1.6~2.3,液性指数大于1.0;当孔隙水溶液盐分浓度大于4.1 g/L时,液限减小率显著降低,仅为0.2~0.8.
Abstract:
To investigate the effects of salt leaching on the degradation of natural sedimented marine clay’s properties in China, the pore salt concentrations of Wenzhou clay and Lianyungang clay were changed by using NaCl solution and distilled water respectively. The physical indexes such as Atterberg limits, activity and so on were measured to study the variation rules of the physical properties of marine clays affected by salt leaching. The results show that the liquid limit and activity decrease and the liquidity index increases with the decrease of the pore salt concentration, while the plastic limit is almost unchanged. The variation curves of the physical properties during salt leaching indicate a threshold concentration 4.1 g/L. When the pore salt concentration is lower than 4.1 g/L, the liquid limit and the activity index decreases drastically. The decreasing rate of the liquid limit is 1.6 to 2.3, and the liquidity index is larger than 1.0. When the pore water salinity is larger than 4.1 g/L, the decreasing rate of the liquid limit decreases to 0.2 to 0.8.

参考文献/References:

[1] Quigley R M. Geology, mineralogy, and geochemistry of Canadian soft soils: a geotechnical perspective [J]. Canadian Geotechnical Journal, 1980, 17(2): 261-285.
[2] Kenney T C. Sea-level movements and the geologic histories of the post-glacial marine soils at Boston, Nicolet, Ottawa and Oslo [J]. Geotechnique, 1964, 14(3): 203-230.
[3] 沈明洁, 谢志仁, 朱诚. 中国东部全新世以来海面波动特征探讨[J]. 地球科学进展, 2002, 17(6): 886-894.
  Shen Mingjie, Xie Zhiren, Zhu Cheng. Characteristics of sea-level fluctuations since holocene in the regions of eastern China [J]. Advance in Earth Sciences, 2002, 17(6): 886-894.(in Chinese)
[4] Rosenqvist I T. Considerations on the sensitivity of Norwegian quick-clays [J]. Geotechnique, 1953, 3(5): 195-200.
[5] Bjerrum L, Rosenqvist I T. Some experiments with artificially sedimented clays [J]. Geotechnique, 1956, 6(3): 124-136.
[6] Torrance J K. A laboratory investigation of the effect of leaching on the compressibility and shear strength of Norwegian marine clays [J]. Geotechnique, 1974, 24(2): 155-173.
[7] Torrance J K. On the role of chemistry in the development and behavior of the sensitive marine clays of Canada and Scandinavia [J]. Canadian Geotechnical Journal, 1975, 12(3): 326-335.
[8] Bjerrum L. Stability of natural slopes in quick clay [J]. Geotechnique, 1955, 5(1): 101-119.
[9] Bjerrum L. Engineering geology of Norwegian normally-consolidated marine clays as related to settlements of buildings [J]. Geotechnique, 1967, 17(2): 83-118.
[10] Eden W J, Fletcher E B, Mitchell R J. South Nation River landslide, 16 May 1971 [J]. Canadian Geotechnical Journal, 1971, 8(3): 446-451.
[11] Ter-Stepanian G. Quick clay landslides: their enigmatic features and mechanism [J]. Bulletin of Engineering Geology and the Environment, 2000, 59(1): 47-57.
[12] Locat A, Leroueil S, Bernander S, et al. Progressive failures in Eastern Canadian and Scandinavian sensitive clays [J]. Canadian Geotechnical Journal, 2011, 48(11): 1696-1712.
[13] 任美锷, 丁方叔, 万延森, 等. 江苏省海岸带和海涂资源综合调查:报告 [M]. 北京: 海洋出版社, 1986:517.
[14] 汪品先, 闵秋宝, 卞云华, 等. 我国东部第四纪海侵地层的初步研究 [J]. 地质学报, 1981(1): 1-13.
  Wang Pinxian, Min Qiubao, Bian Yunhua, et al. Strata of Quaternary transgressions in East China: a preliminary study [J]. Acta Geological Sinica, 1981(1): 1-13.(in Chinese)
[15] 魏汝龙. 软粘土的强度和变形 [M]. 北京:人民交通出版社, 1987: 5-23.
[16] Skemption A W, Northey R D. The sensitivity of clays [J]. Geotechnique, 1952, 3(1): 30-53.

备注/Memo

备注/Memo:
收稿日期: 2015-01-08.
作者简介: 宋苗苗(1987—),女,博士生;洪振舜(联系人),男,博士,教授,博士生导师,zshong@seu.edu.cn.
基金项目: 水利部公益性行业科研专项经费资助项目(201401006)、国家自然科学基金重点资助项目(41330641)、江苏省普通高校研究生科研创新计划资助项目(KYLX-0145).
引用本文: 宋苗苗,王超,洪振舜,等.盐分浸析对我国海相沉积土物理性质的影响[J].东南大学学报:自然科学版,2015,45(3):591-594. [doi:10.3969/j.issn.1001-0505.2015.03.031]
更新日期/Last Update: 2015-05-20