Effective stiffness matrix calculation of geocell layer and reinforcement mechanism analysis of geocell reinforced embankment

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL Geotextiles and Geomembranes Pub Date : 2024-04-09 DOI:10.1016/j.geotexmem.2024.03.010

Changjun Yin , Jingjing He , Ahmed Adam Khalifa Gowi , Zhuo Li , Chenhang Zhou

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Abstract

The anisotropic effective stiffness matrix (ESM) of the unit cell (UC) of a geocell layer with different laying modes (denoted by θ), which cannot be measured directly by conventional tests but can be obtained by the mathematical homogenization method (MHM) on the UC of the geocell layer, is needed in simulation and design of geocell reinforced embankment. The components of the ESM are divided into two independent parts based on whether they depend on θ. Compared with the direct numerical simulation (DNS), the homogenized numerical simulation (HNS) of the embankment with the ESM reduced the calculation cost, and the settlement loading curves were in good agreement with the test curves. By analyzing the results of HNS, it was found that (1) the vertical stress diffusion effect is independent on θ, (2) the membrane effect is dependent on θ, and (3) two aspects of the lateral resistance effect were verified.

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土工格室层有效刚度矩阵计算及土工格室加固路堤的加固机理分析

在土工格室加固路堤的模拟和设计中，需要得到具有不同铺设模式（用 θ 表示）的土工格室层单元格（UC）的各向异性有效刚度矩阵（ESM），该矩阵无法通过常规试验直接测量，但可以通过对土工格室层单元格的数学均质化方法（MHM）获得。根据是否依赖于 θ，ESM 的组成部分被分为两个独立的部分。与直接数值模拟（DNS）相比，使用 ESM 对路堤进行均匀化数值模拟（HNS）降低了计算成本，沉降荷载曲线与试验曲线吻合良好。通过分析 HNS 的结果发现：(1) 垂直应力扩散效应与 θ 无关；(2) 膜效应与 θ 有关；(3) 验证了侧阻效应的两个方面。

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来源期刊

Geotextiles and Geomembranes 地学-地球科学综合

CiteScore

9.50

自引率

21.20%

发文量

111

审稿时长

59 days

期刊介绍： The range of products and their applications has expanded rapidly over the last decade with geotextiles and geomembranes being specified world wide. This rapid growth is paralleled by a virtual explosion of technology. Current reference books and even manufacturers' sponsored publications tend to date very quickly and the need for a vehicle to bring together and discuss the growing body of technology now available has become evident. Geotextiles and Geomembranes fills this need and provides a forum for the dissemination of information amongst research workers, designers, users and manufacturers. By providing a growing fund of information the journal increases general awareness, prompts further research and assists in the establishment of international codes and regulations.