The Influence of Water Content on the Parameters of Geogrid-Soil Interface

Abstract:

The method of evaluating the effect of geogrid reinforcement mainly is the finite element method at present. The interface between geogrid and soil is set to contacting element normally. The tangential stiffness expression has five parameters totally. The interaction characteristics of geosynthetics and filled soil are related to the soil type and water content. We designed the experimental research program, using direct shear friction test, study the five parameters of the interface between geogrid and soil varied with water content and soil type. The experimental results show that: Whether weathered sands or silty clay, the value of the parameters (k₁,n,c,φ) increase with the increase of water content, when reaching the peak point, then the value of the parameters (k₁,n,c,φ) will decreases with the increase of water content. The water content corresponding to the peak is near the optimum water content. The value of the parameters (R_f) decreases with the increase of water content, when reaching a minimum, the value of the parameters (R_f) will increase with the increase of water content. The water content corresponding to the minimum also is near the optimum water content. The research results can provide reliable basis for the selection of evaluation parameters.

• Periodical: Advanced Materials Research (Volumes 261-263)
• Pages: 1760-1766
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.261-263.1760
• Online since: May 2011
• Authors: Hong Jun Liu, Ying Guo, Wei Shan, Pi Xiang Wang
• Keywords: Geogrid, Interface Element Parameters, Silty Clay, Water Content, Weathered Sandstone

References

[1] SHI You-zhi, MA Shi-dong. Test for interface characteristics of geogrid [J]. Rock and Soil Mechanics, 2003, 24(2):296-299. (In Chinese)

[2] YANG Guang-qing,LI Guang-xin, ZHANG Bao-jian. Experimental studies on interface friction characteristics of geogrids[J]. Chinese Journal of Geotechnical Engineering, 2006, 28(8):948-952. (In Chinese)

[3] MA Shi-don. Testing study on soil interface characteristics of geosynthetic[J].Journal of Yangtze River Scientific Research Institute, 2004,21（1）：11-14. (In Chinese)

[4] P.Y. Huang Z.Q. Long,Y.Lou,et al. Experimental study on load-carrying capacity of carbon fiber- sheet-rein- forced concrete three-point bending specimen with notch. Proc. SPIE,2002,4537:95～98.

DOI: 10.1117/12.468792

[5] Darby J, Skwarski A,Brown P & Haynes M. Pre-stressed advanced composite plates for the repair and strengthening of structures. Proceedings of the 8th International Conference on Structural Faults Repair 99. London,13d15 July 1999:258～269.

[6] XU Lin-rong, LU Da-wei, GU Shao-fu et al. Experimental research on pull-out tests process-separation for reinforcement/soil interface parameters selection[J]. Rock and Soil Mechanics, 2004,25(5):709-714. (In Chinese)

[7] LIU Hong-jun,SHAN Wei,GUO Ying.Effect of moisture on shear strength of interface between reinforcements and soils[J].Journal of Harbin Institute of Technology(New Series),2009,16(Sup.1):202-206. (In Chinese)

[8] YANG You-hai, SU Zai-chao,XIA Qiong. Mechanism and application of short reinforcement under superficial layers of loess embankment slope[J]. China Civil Engineering journal, 2005, 30(11):84-88. (In Chinese)

[9] LUAN Mao-tian, LI Jing-feng,XIAO Cheng-zhi et al. Numerical analysis of performance of geogridsreinforced retaining walls by nonlinear fem [J]. Chinese Journal of Rock Mechanics and Engineering,2005,24(14):2428-2433. (In Chinese)

[10] CUI Wei, ZHANG Zhi-geng,YAN Shu-wang.Mechanism of composite ground with stone columns and geogrid in wetland[J]. Rock and Soil Mechanics, 2009, 30(6):1764-1768. (In Chinese)