理论与试验研究

竹筋格栅加筋黄土界面剪切特性试验研究

  • 陈国舟 ,
  • 杜子博 ,
  • 丁孟翔 ,
  • 张景伟
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  • 1.郑州大学 土木工程学院,郑州 450001;
    2.河南省城乡规划设计研究总院股份有限公司,郑州 450044;
    3.黄河科技学院 工学部,郑州 450006
陈国舟(1986—),男,浙江绍兴人,主要从事岩土工程研究。E-mail:cgzsxmz@163.com
杜子博(1989—),男,河南安阳人,博士,副教授,主要从事土体力学特性与本构关系研究。E-mail:duzibo@zzu.edu.cn

收稿日期: 2024-02-09

  网络出版日期: 2025-01-03

基金资助

国家自然科学基金(U22A20598, 51908513);河南省重点研发与推广专项(212102310279);河南省重点研发专项(241111322500)

Experimental Study on Interface Shear Properties of Loess Reinforced with Bamboo Geogrid

  • Chen Guozhou ,
  • Du Zibo ,
  • Ding Mengxiang ,
  • Zhang Jingwei
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  • 1. School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China;
    2. Henan Urban Planning Institute & Corporation, Zhengzhou 450044, P. R. China;
    3. Engineering Department of Huanghe S & T University, Zhengzhou 450006, P. R. China

Received date: 2024-02-09

  Online published: 2025-01-03

摘要

为研究竹筋格栅加筋黄土的界面特性,本文开展了9组大型直剪试验,分别探究筋土界面特性受加筋类型、填土压实度、格栅网口尺寸的影响,并对其影响机理进行分析。结果表明:当剪切位移较小时,竹筋格栅加筋黄土界面剪切应力随剪切位移的增加逐渐增大并达到峰值,随着剪切位移进一步增大,界面剪切应力开始下降并趋近于一个稳定的残余应力;竹筋格栅的加筋作用使土体的黏聚力和内摩擦角均有所提升,且提升效果优于土工格栅;竹筋格栅加筋黄土界面抗剪强度随填土压实度的增大而增大;存在一个最佳格栅网口尺寸,使界面抗剪强度最大。成果可为竹筋格栅加筋黄土的工程应用提供参考。

本文引用格式

陈国舟 , 杜子博 , 丁孟翔 , 张景伟 . 竹筋格栅加筋黄土界面剪切特性试验研究[J]. 地下空间与工程学报, 2024 , 20(6) : 1885 -1893 . DOI: 10.20174/j.JUSE.2024.06.14

Abstract

In order to study the interface properties of loess reinforced with bamboo geogrid, 9 sets of large direct shear tests were conducted to investigate the effects of reinforcement type, grids mesh size and fill compaction on the interfacial properties of reinforced loess, and to analyze the mechanism of their effects. The results show that when the shear displacement is small, the interfacial shear stress increases gradually with the increase of shear displacement and reaches the peak value, and with the further increase of shear displacement, the interfacial shear stress starts to decrease and tends to a stable residual stress; the reinforcing effect of bamboo geogrid increases the cohesion and internal friction angle of the soil, and the enhancement effect is better than that of geogrid. The interface shear strength increases with the increase of fill compaction; there exists an optimal grid mesh size to maximize the interface shear strength. This paper compares the reinforcing effect of bamboo geogrid and geogrid on loess and provides a reference for the engineering application of bamboo reinforced grating on loess.

参考文献

[1] 刘开富, 许家培, 周青松, 等. 土工格栅-土体界面特性大型直剪试验研究[J]. 岩土工程学报, 2019, 41(增1): 185-188. (Liu Kaifu, Xu Jiapei, Zhou Qingsong, et al. Large-scale direct shear tests on properties of geogrid-soil interfaces[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(Supp.1): 185-188.(in Chinese))
[2] 杨广庆, 杨春玲. 土工格栅拉拔试验影响因素分析[J]. 地下空间, 2004(1):31-32, 63-138. (Yang Guangqing, Yang Chunling. Analysis of factors influencing the pullout test of geogrid[J]. Underground Space, 2004(1):31-32, 63-138. (in Chinese))
[3] 史旦达, 刘文白, 水伟厚, 等. 单、双向塑料土工格栅与不同填料界面作用特性与对比试验研究[J]. 岩土力学, 2009, 30(8): 2237-2244. (Shi Danda, Liu Wenbai, Shui Weihou, et al. Comparative experimental studies of interface characteristics between uniaxial/biaxial plastic geogrids and different soils[J]. Rock and Soil Mechanics, 2009, 30(8): 2237-2244. (in Chinese))
[4] 万亮, 杨和平. 影响格栅加筋膨胀土拉拔试验的新因素分析[J]. 地下空间与工程学报, 2020, 16(2): 412-419. (Wan Liang, Yang Heping. Analysis on new factors affecting geogrid pullout test in expansive soil[J]. Journal of Underground Space and Engineering, 2020, 16(2): 412-419. (in Chinese))
[5] Ezzein F M,Bathoust R J. A new approach to evaluated soil-geosynthetic interaction using a novel pullout test apparatus and transparent granular soil[J]. Geotextiles and Geomembranes, 2014, 42(2): 246-255.
[6] Liu C N, He Y H, Huang J W. Large scale direct shear tests of soil/PET-yarn geogrid interfaces[J]. Geotextiles and Geomembrances, 2009, 27(1): 19-30.
[7] Moraci N, Recalcati P. Factors affecting the pullout behaviour of extruded geogrids embedded in a compacted granular soil[J]. Geotextiles and Geomembranes, 2006,24(4): 220-242.
[8] Lee K M, Manjunath V R. Soil-geotextile interface friction by direct shear test[J]. Canadian Geotechnical Journal, 2000, 37(1): 238-252.
[9] Palmeira E M. Soil-geosynthetic interaction: Modelling and analysis[J]. Geotextiles and Geomembranes, 2009, 27(5): 368-390.
[10] 刘文白, 周健. 土工格栅与土界面作用特性试验研究[J]. 岩土力学, 2009, 30(4): 965-970. (Liu Wenbai, Zhou Jian. Experimental research on interface friction of geogrids and soil[J]. Rock and Soil Mechanics, 2009, 30(4): 965-970. (in Chinese))
[11] 徐超, 孟凡祥. 剪切速率和材料特性对筋-土界面抗剪强度的影响[J]. 岩土力学, 2010, 31(10): 3101-3106. (Xu Chao, Meng Fanxiang. Effects of shear rate and material properties on shear strength of geosynthetic-soil interface[J]. Rock and Soil Mechanics, 2010, 31(10): 3101-3106. (in Chinese))
[12] 王蕾, 符文熹, 郜进良. 用竹筋格栅加固公路软基[J]. 地下空间与工程学报, 2014, 10(增2): 1899-1903. (Wang Lei, Fu Wenxi, Gao Jinliang. Use of bamboo geo-grid for reinforcement of expressway soft subgrade[J]. Journal of Underground Space and Engineering, 2014, 10(Supp.2): 1899-1903. (in Chinese))
[13] 张玲玲, 文华, 张志伟. 钻前工程竹筋加筋土工程特性试验研究[J]. 岩石力学与工程学报, 2014, 33(增2): 3829-3833. (Zhang Lingling, Wen Hua, Zhang Zhiwei. Application research on bamboo of subgrade in preliminary engineering for drilling[J]. Chinese Journal of Rock Mechanics and Engineering, 2014, 33(Supp.2): 3829-3833. (in Chinese))
[14] Ahiewar S K, Mandal J N. Behaviour of bamboo grid-reinforced soil bed[J]. International Journal of Geotechnical Engineering, 2021, 15(7): 867-876.
[15] Akhil K S, Sankar N, Chandrakaran S. Surface heave behaviour of sand bed reinforced with woven bamboo mat[J]. Geotechnical and Geological Engineering, 2022, 19(13): 6909-6920.
[16] 罗正东, 谌灿, 董辉, 等. 竹筋格栅加筋山区挖填路基承载变形机理研究[J]. 实验力学, 2019, 34(5): 824-832. (Luo Zhengdong, Chen Can, Dong Hui, et al. Study of the bearing deformation mechanism of bamboo tendon grating strengthened subgrade excavation and filling in mountain area[J]. Journal of Experimental Mechanics, 2019, 34(5): 824-832. (in Chinese))
[17] 乔来军, 周国庆, 商翔宇, 等. 不同含水量黄土—筋带接触特性试验及应用研究[J]. 采矿与安全工程学报, 2010, 27(4): 553-557. (Qiao Laijun, Zhou Guoqing, Shang Xiangyu, et al. Test of mechanical behavior of loess-geobelt interface with different water content[J]. Journal of Mining & Safety Engineering, 2010, 27 (4): 553 - 557. (in Chinese))
[18] 唐皓, 李华华, 刘驰洋, 等. 棕榈加筋黄土剪切强度特性及细观结构[J]. 科学技术与工程, 2020, 20(19): 7832-7837. (Tang Hao, Li Huahua, Liu Chiyang, et al. Shear strength characteristics and meso-mechanism of palm-reinforced loess[J]. Science Technology and Engineering, 2020, 20(19): 7832-7837. (in Chinese))
[19] 褚峰, 邵生俊, 邓国华, 等. 纤维纱加筋黄土一维蠕变特性试验研究[J]. 岩石力学与工程学报, 2022, 41(5): 1054-1066. (Chu Feng, Shao Shengjun, Deng Guohua, et al. Experimental study on one dimensional creep behavior of loess reinforced with fiber yarn[J]. Chinese Journal of Rock Mechanics and Engineering, 2022, 41(5): 1054-1066. (in Chinese))
[20] 宋飞,朱婕,付娆.考虑蠕变变形的格室加筋土力学性质研究[J].地下空间与工程学报,2023,19(增1):165-173.(Song Fei,Zhu Jie,Fu Rao.Investigation on the mechanical properties of geocell-reinforced soil considering creep effects[J].Chinese Journal of Underground Space and Engineering,2023,19(Supp.1):165-173.(in Chinese))
[21] 何玉琪, 廖红建, 董琪, 等. 加筋材料改良黄土强度特性的试验研究[J]. 岩土工程学报, 2021, 43(增1): 181-185. (He Yuqi, Liao Hongjian, Dong Qi, et al. Experimental study on strength characteristics of geogrid-reinforced loess[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(Supp.1): 181-185.(in Chinese))
[22] 包承纲, 汪明远, 丁金华. 格栅加筋土的工作机理试验研究[J]. 长江科学院院报, 2013, 30(1): 34-41. (Bao Chenggang, Wang Mingyuan, Ding Jinhua. Experimental study on working mechanism of grille reinforced soil[J]. Journal of Yangtze River Scientific Research Institute, 2013, 30(1): 34-41. (in Chinese))
[23] 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(3): 629-634. (Xiong Tiantian, Liao Hongjian, Yang Bo, et al. Experimental study on influence factors of shear strength between geogrid and soil interface[J]. Journal of Underground Space and Engineering, 2018, 14(3): 629-634. (in Chinese))
[24] 王协群, 张俊峰, 邹维列, 等. 格栅-土界面抗剪强度模型及其影响因素[J]. 土木工程学报, 2013, 46(4): 133-141. (Wang Xiequn, Zhang Junfeng, Zou Weilie, et al. A shear strength model of geogrid-soil interface and its influence factors[J]. China Civil Engineering Journal, 2013, 46(4): 133-141. (in Chinese))
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