从流动到可塑状态软黏土的一维固结特性试验研究

雷国辉; 杨元上; 赵仲辉

doi:10.11779/CJGE201811004

从流动到可塑状态软黏土的一维固结特性试验研究 English Version

雷国辉^1,2,
杨元上^1,2,3,
赵仲辉^1,2

1. 河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京 210098;
2. 河海大学江苏省岩土工程技术工程研究中心,江苏南京 210098;
3. 中国电建集团昆明勘测设计研究院有限公司,云南昆明 650051

基金项目: 国家自然科学基金项目（51778211,51578213）; 中央高校基本科研业务费专项资金项目（2017B20614,2017B00814）; 高等学校学科创新引智计划即“111 计划”（B13024）

详细信息

作者简介:
雷国辉(1972- ),男,江西丰城人,博士,教授,从事土力学教学与科研工作。E-mail: leiguohui@hhu.edu.cn。

中图分类号: TU411
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出版历程
- 收稿日期: 2017-09-28
- 发布日期: 2018-11-24

Experimental study on one-dimensional consolidation behavior of soft clay from liquid state to plastic state

1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China;
2. Jiangsu Research Center for Geotechnical Engineering Technology, Hohai University, Nanjing 210098, China;
3. Powerchina Kunming Engineering Corporation Limited, Kunming 650051, China

摘要

摘要: 软土在固结过程中含水率的减小将导致其物理状态从流动态进入可塑态,为研究物理状态变化对软黏土的压缩性和渗透性的作用影响,采用饱和重塑黏土,配制高于液限含水率和接近液限含水率的试样,分别开展不同压力作用下的一维固结试验,依据位移和孔压测试数据,对比分析了固结过程中的位移发展、孔压消散、压缩系数以及渗透系数的变化特性。结果表明：在流动状态下,位移快速发展,而孔压却存在明显的滞消现象;进入可塑状态后,压缩系数和渗透系数的对数随孔隙比的变化关系均发生明显的转折。这意味着,在软土固结问题的理论分析中,应考虑物理状态的变化对土体压缩性和渗透性参数变化规律的影响。
- 一维固结 /
- 流动态 /
- 可塑态 /
- 压缩性 /
- 渗透性
Abstract: Decrease in the water content of soft soil under consolidation will lead to a change from liquid state to plastic state. An experimental study is conducted to investigate the effects of change in the physical state on the compressibility and permeability of soft clay. The saturated and reconstituted clay specimens are prepared with water contents higher than and close to the liquid limit. One-dimensional consolidation tests are carried out under different vertical pressures. Based on the test results, a comparative analysis is conducted on the deformation, dissipation of pore-water pressure, and changes in the coefficient of compressibility and the hydraulic conductivity during the consolidation process. It is shown that in the liquid state, the deformation increases quickly, but the stagnation phenomenon of pore-water pressure dissipation appears clearly. There is an evident change in the relations between the logarithms of the coefficient of compressibility and the hydraulic conductivity and the void ratio when the soil state is transited to the plastic one. It is implied that the effects of the transition of physical state on the changes in the compressibility and permeability parameters should be taken into account in the theoretical analysis of consolidation problems of soft soil.
- one-dimensional consolidation /
- liquid state /
- plastic state /
- compressibility /
- permeability

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参考文献(30)

[1]	SAHDI F, GAUDIN C, WHITE D J.Strength properties of ultra-soft kaolin[J]. Canadian Geotechnical Journal, 2014, 51(4): 420-431.
[2]	BOUKPETI N, WHITE D J, RANDOLPH M F, et al.Strength of fine-grained soils at the solid-fluid transition[J]. Géotechnique, 2012, 62(3): 213-226.
[3]	邓永锋, 岳喜兵, 张彤炜, 等. 连云港海相软土在孔隙水盐分溶脱环境下的固结特性[J]. 岩土工程学报, 2015, 37(1): 47-53. (DENG Yong-feng, YUE Xi-bing, ZHANG Tong-wei, et al.Consolidation behaviors of soft marine clay in Lianyungang under desalination environment of pore water[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(1): 47-53. (in Chinese))
[4]	王军, 蔡袁强, 郭林, 等. 分阶段循环加载条件下温州饱和软黏土孔压和应变发展规律[J]. 岩土工程学报, 2012, 34(7): 1349-1354. (WANG Jun, CAI Yuan-qiang, GUO Lin, et al.Pore pressure and strain development of Wenzhou saturated soft soil under cyclic loading by stages[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(7): 1349-1354. (in Chinese))
[5]	汪顺才, 张春雷, 黄英豪, 等. 堆场疏浚淤泥含水率分布规律调查研究[J]. 岩土力学, 2010, 31(9): 2823-2828. (WANG Shun-cai, ZHANG Chun-lei, HUANG Ying-hao, et al.Study of diversification of water contents in dredged sediment storage yard[J]. Rock and Soil Mechanics, 2010, 31(9): 2823-2828. (in Chinese))
[6]	缪林昌, 张军辉, 陈艺南. 江苏海相软土压缩特性试验研究[J]. 岩土工程学报, 2007, 29(11): 1711-1714. (MIAO Lin-chang, ZHANG Jun-hui, CHEN Yi-nan.Study on compressibility of Jiangsu marine clay[J]. Chinese Journal of Geotechnical Engineering, 2007, 29(11): 1711-1714. (in Chinese))
[7]	ABUEL-NAGA H M, PENDER M J. Modified Terzaghi consolidation curves with effective stress-dependent coefficient of consolidation[J]. Géotechnique Letters, 2012, 2(2): 43-48.
[8]	FOX P J, BAXTER C D P. Consolidation properties of soil slurries from hydraulic consolidation test[J]. Journal of Geotechnical and Geoenvironmental Engineering, ASCE, 1997, 123(8): 770-776.
[9]	BERILGEN S A, BERILGEN M M, OZAYDIN I K.Compression and permeability relationships in high water content clays[J]. Applied Clay Science, 2006, 31(3/4): 249-261.
[10]	HONG Z S, YIN J, CUI Y J.Compression behaviour of reconstituted soils at high initial water contents[J]. Géotechnique, 2010, 60(9): 691-700.
[11]	HONG Z S, ZENG L L, CUI Y J, et al.Compression behaviour of natural and reconstituted clays[J]. Géotechnique, 2012, 62(4): 291-301.
[12]	BURLAND J B.The 30th Rankine Lecture: on the compressibility and shear strength of natural clays[J]. Géotechnique, 1990, 40(3): 329-378.
[13]	FEARON R E, COOP M R.Reconstitution: what makes an appropriate reference material?[J]. Géotechnique, 2000, 50(4): 471-477.
[14]	ROWE P W, BARDEN L.A new consolidation cell[J]. Géotechnique, 1966, 16(2): 162-170.
[15]	LEROUEIL S, VAUGHAN P R.The general and congruent effects of structure in natural soils and weak rocks[J]. Géotechnique, 1990, 40(3): 467-488.
[16]	ROBINSON R G.Consolidation analysis with pore water pressure measurements[J]. Géotechnique, 1999, 49(1): 127-132.
[17]	BERRE T.Test fill on soft plastic marine clay at Onsøy, Norway[J]. Canadian Geotechnical Journal, 2014, 51(1): 30-50.
[18]	BO M W, CHOA V, ARULRAJAH A, et al.One-dimension compression of slurry with radial drainage[J]. Soils and Foundations, 1999, 39(4): 9-17.
[19]	BO M W, CHOA V, WONG K S, et al.Investigation on deformation behavior of high moisture content soil[J]. Soils and Foundations, 2002, 42(2): 35-46.
[20]	BO M W, CHOA V, WONG K S.Compression tests on a slurry using a small-scale consolidometer[J]. Canadian Geotechnical Journal, 2002, 39(2): 388-398.
[21]	BO M W, SIN W K, CHOA V, et al.Compression tests of ultra-soft soil using an hydraulic consolidation cell[J]. Geotechnical Testing Journal, ASTM, 2003, 26(3): 310-319.
[22]	BO M W, WONG K S, CHOA V.Investigation on compressibility of high moisture content soil with hydraulic consolidation cell[J]. Geotechnical Engineering, Southeast Asian Geotechnical Society, 2004, 35(3): 133-139.
[23]	MITCHELL J K.The 20th Terzaghi Lecture: practical problems form surprising soil behavior[J]. Journal of Geotechnical Engineering, ASCE, 1986, 112(3): 259-289.
[24]	MESRI G, CHOI Y K.Settlement analysis of embankments on soft clays[J]. Journal of Geotechnical Engineering, ASCE, 1985, 111(4): 441-464.
[25]	CHANG Y C E. Discussion of "Settlement analysis of embankments on soft clays"[J]. Journal of Geotechnical Engineering, ASCE, 1987, 113(9): 1063-1067.
[26]	LARSSON R.Long-term observations of consolidation processes-results from about fifty years' monitoring of Swedish test embankments on soft clay[J]. Geotechnical Engineering, Southeast Asian Geotechnical Society, 2006, 37(1): 53-78.
[27]	TAYLOR D W.Fundamentals of soil mechanics[M]. New York: John Wiley & Sons, Inc, 1948.
[28]	TAVENAS F, JEAN P, LEBLOND P, et al.The permeability of natural soft clays. Part II: permeability characteristics[J]. Canadian Geotechnical Journal, 1983, 20(4): 645-660.
[29]	MESRI G, LO K, FENG T W.Settlement of embankments on soft clays[C]// Vertical and horizontal deformation of foundations and embankments, ASCE. New York, 1994: 8-56.
[30]	BABU G L, PANDIAN N S, NAGARAJ T S.A re-examination of the permeability index of clays[J]. Canadian Geotechnical Journal, 1993, 30(1):187-191.

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