[1]冯 忞,宋文捷.含水率对残积土与土工织物界面剪切特性的影响[J].华南地震,2024,(01):157-164.[doi:10.13512/j.hndz.2024.01.18]
FENG Min,SONG Wenjie.Effect of Moisture Content on the Shear Characteristics of the Interface Between Residual Soil and Geotextile[J].,2024,(01):157-164.[doi:10.13512/j.hndz.2024.01.18]
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含水率对残积土与土工织物界面剪切特性的影响()
华南地震[ISSN:1006-6977/CN:61-1281/TN]
- 卷:
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- 期数:
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2024年01期
- 页码:
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157-164
- 栏目:
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土木工程防震减灾
- 出版日期:
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2024-03-30
文章信息/Info
- Title:
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Effect of Moisture Content on the Shear Characteristics of the Interface Between Residual Soil and Geotextile
- 文章编号:
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1001-8662(2024)01-0157-08
- 作者:
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冯 忞1; 宋文捷2
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1.上海浦东建筑设计研究院有限公司,上海 201204;2.上海大学力学与工程科学学院,上海 200444
- Author(s):
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FENG Min1; SONG Wenjie2
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1.Shanghai Pudong Architectural Design and Research Institute Co.,Ltd.,Shanghai 201204,China;2.School of Mechanics and Engineering Science , Shanghai University , Shanghai 200444, China
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- 关键词:
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加筋土; 筋土界面; 直剪试验; 抗剪强度; 含水率
- Keywords:
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Reinforced soil; Interface between geogrid and soil; Direct shear test; Shear strength; Moisture content
- 分类号:
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TU442
- DOI:
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10.13512/j.hndz.2024.01.18
- 文献标志码:
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A
- 摘要:
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为探究不同影响因素下残积土与土工织物界面的剪切特性,采用气动直剪仪对土工织物加筋残积土试样进行直剪试验。考虑含水率、剪切速率、竖向应力等因素,分析不同剪切速率和竖向应力下含水率对残积土与土工织物界面剪切特性的影响。试验结果表明:在同一含水率情况下,筋土界面的抗剪强度与竖向应力成正比,在含水率为17%时,竖向应力50kPa的抗剪强度从53kPa分别增加到84kPa(100kPa)、151kPa(200kPa);随着含水率的增加,界面似黏聚力显著降低,筋土界面抗剪强度减小,而界面摩擦角无明显变化。剪切速度主要影响筋土界面摩擦角,筋土界面抗剪强度随着剪切速率的增大而增大;且在高剪切速率、低含水率情况下,筋土界面的剪缩现象在达到一定剪切位移后有所缓解,最后趋于平稳。
- Abstract:
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In order to investigate the shear characteristics of the interface between residual soil and geotextile under different influence factors,the direct shear tests were carried out on the residual soil samples reinforced with geotextile by using pneumatic direct shear apparatus. Considering moisture content, shear rate, vertical stress and other factors, the effect of moisture content on the shear characteristics of the interface between residual soil and geotextile under different shear rates and vertical stresses is analyzed. The test results show that the shear strength of the reinforced soil interface is proportional to the vertical stress under the same moisture content, and when the moisture content is 17%, the shear strength of the vertical stress of 50 kPa increases from 53 kPa to 84 kPa(100 kPa)and 151 kPa(200 kPa),respectively. With the increase of moisture content, the apparent cohesion and shear strength of the reinforced soil interface decrease significantly, but the friction angle of the soil interface has no obvious change. The shear rate mainly affects the friction angle of the reinforced soil interface,and the shear strength of the reinforced soil interface increases with the increase of shear rate. In the case of high shear rate and low moisture content, the shear shrinkage of the interface is relieved after reaching a certain shear displacement,and finally tends to be stable.
参考文献/References:
[1] Suzuki M,Koyama A,Kochi Y,et al. Interface shear strength between geosynthetic clay liner and covering soil on the embankment of an irrigation pond and stability evaluation of its widened sections[J]. Soils and Foundations,2017,57(2):301-314.
[2] Wei Yujie,Wu Xinliang,Xia Jinwen,et al. The effect of water content on the shear strength characteristics of granitic soils in South China[J]. Soil and Tillage Research,2019 (187):50-59.
[3]金解放,徐虹,余雄,等.动荷载和含水率对红砂岩破坏及能耗特性的影响[J].岩土力学,2022,43(12):3231-3240.
[4]吕玺琳,程博文,张甲峰,等.含水率对土石混合料力学特性影响试验研究[J].地基处理,2023,5(02):97-104.
[5]简涛,孔令伟,柏巍,等.含水率对原状黄土小应变剪切模量影响的试验研究[J]. 岩土工程学报,2022,44(S1):160-165.
[6] Abu-farsakh M,Coronel J,Tao M. Effect of soil moisture content and dry density on cohesive soil-geosynthetic interactions using large direct shear tests[J]. Journal of Materials in Civil Engineering,2007,19(7):540-549.
[7] Anubhav,Basudhar P K. Modeling of soil-woven geotextile interface behavior from direct shear test results[J],Geotextile and Geomembranes,2010,28(4):403-408
[8] Nye C,Fox P. Dynamic shear behavior of a needle-punched geosynthetic clay liner [J]. Journal of Geotechnical and Geo environmental Engineering,2007,133(8):973-983
[9] Biabani M M,Indraratna B. An evaluation of the interface behaviour of rail subballast stabilised with geogrids and geomembranes[J]. Geotextiles and Geomembranes,2015,43 (3):240-249.
[10] He Z,Mo H,Siga A,et al. Research on the parameters of nonlinear hyperbolic model for clay-geogrid interfaces based on large scale direct shear tests[J]. Transportation Geotechnics,2019(18):39-45.
[11] Ferreira F B,Vieira C,Lopes M L. Direct shear behaviour of residual soil-geosynthetic interfaces-influence of soil moisture content,soil density and geosynthetic type[J]. Geosynthetics International,2015,22(3):257-272.
[12]任非凡,刘铨.加筋土结构筋—土界面特性研究进展[J].西部交通科技,2020(04):5-10+28.
[13]刘飞禹,孔剑捷,姚嘉敏.含石量和压实度对格栅—土石混合体界面剪切特性的影响[J] .岩土工程学报,2023,45 (05):903-911.
[14]刘飞禹,李婧婷,应梦杰,等.位移幅值对砾石—格栅界面循环剪切特性的影响[J]. 中国公路学报,2023,36 (05):58-64.
[15]刘飞禹,王攀,王军,等.不同剪切速率下格栅—土界面循环剪切及其后直剪特性[J]. 岩石力学与工程学报, 2016,35(02):387-395.
[16]熊甜甜,廖红建,杨博,等.加筋土筋土界面抗剪强度影响因素试验研究[J]. 地下空间与工程学报,2018,14 (03):629-634.
[17]刘志伟,丁波涛,梁崇旭.含水率对花岗岩边坡风化层界面剪切特性的影响[J].华南地震,2021,41(04):115-120.
[18]王培清,王保田,陈西安.不同含水率对筋土界面抗剪强度的影响[J].施工技术,2007(08):86-89.
[19]冯钰洁,汪峻峰,李光范,等.海口红黏土大型单剪试验研究[J].科学技术与工程,2020,20(13):5276-5282.
[20]蔡国庆,张策,黄哲文,等.含水率对砂质Q3黄土抗剪强度影响的试验研究[J]. 岩土工程学报,2020,42(S2):32-36.
[21]陈胜,徐采薇,徐其功,等.极限状态下灌浆套筒内锚固钢筋的受力原理及变形分析[J]. 华南地震,2023,43 (02):151-157.
备注/Memo
- 备注/Memo:
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收稿日期:2023-08-10
基金项目:国家自然科学基金资助项目(51678352)
作者简介:冯忞(1985-),女,高级工程师,研究方向为道路与交通工程设计与研究。E-mail:272418264@qq.com
更新日期/Last Update:
2024-03-30