Title: Study on creep characteristics of geogrid based on modelling and experimental method

Authors: Li Xia; Shan Dinglong; Zhu Feng; Geng Ying

Addresses: Department of Water Conservancy and Hydropower Engineering, Chongqing Jiaotong University, Chongqing City, China ' Department of Water Conservancy and Hydropower Engineering, Chongqing Jiaotong University, Chongqing City, China ' Department of Water Conservancy and Hydropower Engineering, Chongqing Jiaotong University, Chongqing City, China ' Department of Water Conservancy and Hydropower Engineering, Chongqing Jiaotong University, Chongqing City, China

Abstract: The creep characteristics of geogrid have significant influence on the analysis of retaining wall's mechanical behaviour and deformation characteristics. This paper uses digital speckle pattern interferometer to observe the model test of a retaining wall with embedded geogrid, and analyses the stress and strain distribution of soil behind the retaining wall according to the observation data. The mechanical model of stress distribution of geogrid is established in this paper, and the creep model of geogrid is also established to simulate the time-related behaviour of geogrid. In order to prove the rationality and reliability of the model proposed in this paper, the PFC2D software platform is employed to verify the numerical model of the reinforced retaining wall, and the creep model of geogrid is included into the PFC2D software. The calculation results show that the displacement of the retaining wall can be significantly reduced because of the anchoring effect of the geogrid. The time-dependent displacement of the retaining wall can approximately meet the logarithmic relationship. Therefore, the creep model of geogrid proposed in this paper is effective and reliable, and the method proposed in this paper can provide valuable reference information for similar engineering practice.

Keywords: geogrid; creep characteristics; digital speckle measurement system; particle element; numerical simulation.

DOI: 10.1504/IJCAT.2018.095940

International Journal of Computer Applications in Technology, 2018 Vol.58 No.4, pp.308 - 320

Received: 08 Aug 2017
Accepted: 22 Sep 2017
Published online: 05 Nov 2018 *

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