| 离子类土壤固化剂对高温冻土工程性质改良试验研究 |
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| 引用本文： | 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. |
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| 作者姓名： | 张致龙 张建明 张虎 柴明堂 |
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| 作者单位： | 新疆大学建筑工程学院,新疆乌鲁木齐830046;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;中国科学院大学,北京100049;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;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;中国科学院大学,北京100049 |
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| 基金项目： | 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 |
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| 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。
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| 关 键 词： | 离子类土壤固化剂 塑性指数 高温冻土 体积压缩系数 |
| 收稿时间： | 2017-03-11 |
| 修稿时间： | 2018-10-22 |
Experimental study of the engineering properties of warm frozen soil treated with ionic soil stabilizer (ISS) |
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| 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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| Authors: | ZHANG Zhilong ZHANG Jianming ZHANG Hu CHAI Mingtang |
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| Institution: | 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 |
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| 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. |
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| Keywords: | ionic soil stabilizer (ISS) plasticity index warm frozen soil bulk compressibility coefficient |
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