离子类土壤固化剂对高温冻土工程性质改良试验研究

doi:10.7522/j.issn.1000-0240.2019.0053

冰川冻土 ›› 2019, Vol. 41 ›› Issue (1): 140-146.doi: 10.7522/j.issn.1000-0240.2019.0053

离子类土壤固化剂对高温冻土工程性质改良试验研究

张致龙^1,2,3，张建明²，张虎²，柴明堂^2,3

1.新疆大学建筑工程学院，新疆乌鲁木齐 830046； 2.中国科学院西北生态环境资源研究院冻土工程国家重点实验室，甘肃兰州 730000； 3.中国科学院大学，北京 100049

收稿日期:2017-03-11 修回日期:2018-10-22 出版日期:2019-02-25 发布日期:2019-03-16
通讯作者: 张建明，E-mail: zhangjm@lzb.ac.cn E-mail:zhangjm@lzb.ac.cn
作者简介:张致龙(1978-)，男，甘肃兰州人，讲师，2018年在中国科学院西北生态环境资源研究院获博士学位，从事冻土力学与寒区工程研究. E-mail: 573289332@qq.com
基金资助:
国家自然科学基金项目（41471062；41401087）；冻土工程国家重点实验室自主研究项目（SKLFSE-ZT-06）资助

Experimental study of the engineering properties of warm frozen soil treated with ionic soil stabilizer (ISS)

ZHANG Zhilong^1,2,3, ZHANG Jianming², ZHANG Hu², CHAI Mingtang^2,3

1.College of Civil Engineering and Architecture, Xinjiang University, Urumqi 830046, China; 2.State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; 3.University of Chinese Academy of Sciences, Beijing 100049, China

Received:2017-03-11 Revised:2018-10-22 Online:2019-02-25 Published:2019-03-16

摘要/Abstract

摘要： 为了研究离子类土壤固化剂对青藏高原高温冻土工程性质的改良效果，分别选用酸性和碱性离子类土壤固化剂对冻结青藏粉质黏土进行了改良测试。塑性指数测试表明，两种固化剂的最优含量为0.2%。固化剂含量小于0.3%时，冻结温度相对原状土样没有明显的下降。对不同含量碱性和酸性固化土力学性质进行了测试，无侧限单轴抗压强度相对原状土样整体增大，碱性和酸性固化土抗压强度最大分别提高了78.7%和46.6%，最优配比（0.2%）的碱性和酸性固化土体积压缩系数随养护龄期增大而减小，两种固化土的体积压缩系数相对原状土样最大分别下降了80.0%和38.5%，固化效果明显。碱性固化土力学性质变化更显著，说明其更适合对青藏黏土进行改良。

关键词: 离子土壤固化剂, 塑性指数, 高温冻土, 体积压缩系数

Abstract: In this paper, it is focused on how to improve the engineering property of warm frozen soil on the Tibetan Plateau by ionic soil stabilizer (ISS). The alkaline ISS and acidic ISS were chosen to improve the frozen Tibetan silty clay specimens for soil mechanics test. The optimal proportion of the improved soil specimen was determined by the test of the plasticity index. The maximum compressive strengths of the specimens treated with alkaline ISS and acidic ISS have increased by 78.7% and 46.6%, respectively. The bulk compressibility coefficient of the soil treated with optimal alkaline ISS and acidic ISS have decreased with conservation periods, with the bulk compressibility coefficient decreased by 80.0% and 38.5%, respectively, as compared with the undisturbed soil. One can see that the effect of cementation is obvious. Especially, the mechanics properties of the alkaline solidified soil have improved more significant, showing that it is more suitable for the Tibetan clay to improve.

Key words: ionic soil stabilizer (ISS), plasticity index, warm frozen soil, bulk compressibility coefficient

中图分类号:

TU472.5

张致龙, 张建明, 张虎, 柴明堂. 离子类土壤固化剂对高温冻土工程性质改良试验研究[J]. 冰川冻土, 2019, 41(1): 140-146.

ZHANG Zhilong, ZHANG Jianming, ZHANG Hu, CHAI Mingtang. Experimental study of the engineering properties of warm frozen soil treated with ionic soil stabilizer (ISS)[J]. Journal of Glaciology and Geocryology, 2019, 41(1): 140-146.

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离子类土壤固化剂对高温冻土工程性质改良试验研究

Experimental study of the engineering properties of warm frozen soil treated with ionic soil stabilizer (ISS)

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