RESEARCH ARTICLE


The Mechanical Property of Bidirectional Geogrid and its Application Research in Retaining Wall Design



Wang Qingbiao1, 2, 3, Zhang Cong2, Wang Tiantian1, Bai Yun1, LÜ Rongshan1, Xu Lei1, Zhang Junxian1, Hu Zhongjing1, Xie Fei1, Zheng Tao1, Chen Zhen1, Tang Lingyu, Wang Hui*, 1
1 Department of Resource and Civil Engineering, Shandong University of Science and Technology, Tai’an Shandong 271019, P.R. China
2 State Key Laboratory of Geomechanics and Geotechnical EngineeringđInstitute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, P.R. China
3 Shandong Hualian Mining Co., Ltd., Yi’yuan Shandong 256119, P.R. China


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Creative Commons License
© 2015 Qingbiao et al;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Department of Resource and Civil Engineering, Shandong University of Science and Technology, No 223, Daizong Street, Taishan District, Tai’an Shandong 271019, P.R. China; Tel: +86 18805381111; E-mail: 1349725165@qq.com


Abstract

The introduction and rise of new geotechnical composite material greatly promote the development of civil engineering construction. Studying the mechanical properties of bidirectional geogrid and determining the reinforced soil retaining wall design calculation based on the friction reinforcement theory provide theoretical basis and research foundation for its application in the practical engineering. The mechanical properties of bidirectional geogrid are analyzed in depth through theoretical analysis, experimental research and numerical simulation. The mechanical property tests in light of different affecting factors are studied and the application of geogrid material in the reinforced soil retaining wall is simulated, thus yielding the conclusions as follows: (1) Study the mechanical properties in different temperature, loading and packing with the help of indoor pullout test and analyze the main factors affecting the mechanical properties of the geogrids in theory. (2) Analyze the reinforced soil retaining wall with friction reinforcement principle. Determine the calculation method of soil pressure and reinforcement and the check formula of the overall stability of the whole wall design and calculate the geogrid reinforced soil retaining wall in theory. (3) Simulate the bidirectional geogrid reinforced soil retaining wall with FLAC3D and analyze the force of the retaining wall. Study the stress-strain curve according to the parameters of reinforced geogrid and retaining wall and analyze the overall force to guide the safety of the site construction. (4) Apply to the reinforced soil the retaining wall design. Thus the result is achieved that bidirectional geogrid is simple in construction, excellent in performance and economic in cost and has a good application prospect and social benefit.

Keywords: Bidirectional geogrid, design calculation, FLAC3D, mechanical property, reinforced soil retaining wall.