季节性冻土中土工格栅加筋特性试验研究

陈榕; 王喜强; 郝冬雪; 宋洋洋; 薛楠

doi:10.11779/CJGE201906014

季节性冻土中土工格栅加筋特性试验研究 English Version

陈榕^1,2,
王喜强^1,2,
郝冬雪^1,2, ,,
宋洋洋³,
薛楠⁴

1. 东北电力大学建筑工程学院,吉林吉林 132012;
2. 东北电力大学岩土工程研究所,吉林吉林 132012;
3. 国网昌吉供电公司,新疆昌吉 831100;
4.浙江省送变电工程有限公司,浙江杭州 310020

基金项目: 国家自然科学基金项目（51409045,51308095）; 吉林省科技厅优秀青年人才基金项目（20170520105JH）

详细信息

作者简介:
陈榕(1979— ),男,辽宁沈阳人,博士,副教授,主要从事土工合成材料加筋特性及软弱地基加固处理方法等方面的教学和科研。E-mail: lg1316cih@126.com。

通讯作者:
郝冬雪，E-mail：haodongxue2005@126.com

中图分类号: TU432
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出版历程
- 收稿日期: 2018-06-10
- 发布日期: 2019-06-24

Experimental investigation on reinforced characteristics of geogrids in seasonal frozen soil

1. School of Civil Engineering and Architecture, Northeast Electric Power University, Jilin 132012, China;
2. Institute of Geotechnical Engineering, Northeast Electric Power University, Jilin 132012, China;
3. State Grid Changji Electric Power Supply Company, Changji 831100, China;
4. Zhejiang Electric Transmission & Transformation Co., Ltd., Hangzhou 310020, China;

摘要

摘要: 针对东北地区典型粉质黏土,通过一系列土工格栅在冻土中的拉拔试验,重点分析了土壤含水率及冻融循环作用对土工格栅加筋性能的影响,并基于拉拔摩擦强度、表观摩擦系数、界面摩擦阻力和端承被动阻力等理论,对试验数据进行了详细分析。研究发现：含水率对土工格栅加筋效果存在明显抑制作用,含水率从20%提高至32%时,筋土界面摩擦阻力和端承被动阻力均减小60%以上。而当含水率一定时（w=24%）,冻融循环作用反而提高了土工格栅的加筋效果,经历7次冻融循环后,土工格栅加筋效果增幅为30%左右,主要是横肋前端承被动阻力的提高,而筋土间界面摩擦阻力变化不大。上述试验成果可为土工格栅在冻土地区的推广应用提供一定的理论依据。
- 冻融循环 /
- 季节性冻土 /
- 土工格栅 /
- 加筋特性
Abstract: A series of pullout tests to investigate the reinforced characteristics of geogrids in frozen soil are conducted in the laboratory under various moisture contents and different freeze-thaw cycles. Based on the theories about frictional strength, apparent friction coefficient, interface frictional resistance and passive resistance, the test data are analyzed. Some conclusions are drawn that the moisture content can obviously inhibit the effect of reinforcement. The interface frictional resistance and passive resistance both decrease to 40% while the moisture content increases from 20% to 32%. Then the moisture content is constant to 24%, the freeze-thaw cycles can improve the reinforcement effect of geogrids. Mainly for the passive resistance has a certain extent enhancement, but the interface frictional resistance nearly has no change. The experimental results are of referring value for the design of geogrids-reinforced earth structures.
- freeze-thaw cycle /
- seasonal frozen soil /
- geogrid /
- reinforced characteristic

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参考文献(11)

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施引文献(31)

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9.	易富，于犇，于汇泽，杜常博，金洪松. 三向格栅与细粒尾矿界面特性拉拔试验研究. 中国安全科学学报. 2021(01): 67-74 . 百度学术
10.	武秀文，赵菲. 土工格栅与不同材料加筋土抗剪强度研究. 居舍. 2020(34): 21-22 . 百度学术