Experimental study of a pseudo-preconsolidation pressure in frozen soils
文献类型：期刊论文
| 作者 | Qi, Jilin; Hu, Wei; Ma, Wei |
| 刊名 | COLD REGIONS SCIENCE AND TECHNOLOGY
 |
| 出版日期 | 2010-03-01 |
| 卷号 | 60期号:3页码:230-233 |
| 关键词 | Frozen soil K(0) compression Pseudo-preconsolidation pressure Creep |
| ISSN号 | 0165-232X |
| DOI | 10.1016/j.coldregions.2009.10.008 |
| 通讯作者 | Qi, Jilin(qijilin@lzb.ac.cn) |
| 英文摘要 | Preconsolidation pressure (p(c)) is an important parameter in soil mechanics. For conventional unfrozen soils. pc is an index of the loading history and has a close relationship with the mechanical properties of soils. For frozen soils, special structures exist due to the interaction between ice and soil grains. A similar index like p, may exist in frozen soils, which is of great importance in the study of their mechanical properties. In this paper, clay obtained from the Qinghai-Tibet Railway is taken as the study object. K(0) compression tests were carried out on remolded soil samples with a wide range of dry unit weights under different negative temperatures. Double logarithmic coordinates were used to obtain the preconsolidation pressure index of the frozen soil. The test results show that an index does exist in the frozen soil, which is called pseudo-preconsolidation pressure (PPC) to take into account its different nature to p, in conventional soil mechanics. The test results also show that PPC is dependent on the initial dry unit weight of the frozen soil, but temperature is a more dominant factor. In order to investigate the influence of creep on frozen soils and use creep models for unfrozen soft soils, creep tests were carried out at different creep times at different temperatures. PPC was found to change in different ways with different pre-loads during creep. Further more extensive studies on the creep effects of pre-load on PPC would help to establish creep models for frozen soils. (C) 2009 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | CLAYS |
| WOS研究方向 | Engineering ; Geology |
| WOS类目 | Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000274369300007 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2556316 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Qi, Jilin |
| 作者单位 | Chinese Acad Sci, CAREERI, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qi, Jilin,Hu, Wei,Ma, Wei. Experimental study of a pseudo-preconsolidation pressure in frozen soils[J]. COLD REGIONS SCIENCE AND TECHNOLOGY,2010,60(3):230-233. |
| APA | Qi, Jilin,Hu, Wei,&Ma, Wei.(2010).Experimental study of a pseudo-preconsolidation pressure in frozen soils.COLD REGIONS SCIENCE AND TECHNOLOGY,60(3),230-233. |
| MLA | Qi, Jilin,et al."Experimental study of a pseudo-preconsolidation pressure in frozen soils".COLD REGIONS SCIENCE AND TECHNOLOGY 60.3(2010):230-233. |
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来源：寒区旱区环境与工程研究所
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