Plastic shakedown limit of geosynthetic reinforced coarse-grained soil: Experiments and prediction model

IF 4.7 1区 工程技术 Q1 ENGINEERING, GEOLOGICAL Geotextiles and Geomembranes Pub Date : 2024-04-30 DOI:10.1016/j.geotexmem.2024.04.007
Dongjie Zhang , Kai Cui , Qionglin Li , Shangchuan Yang , Pangju Li , Zhifeng Wu , Xiaohao Li , Jinhong Xie
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Abstract

This study aims to explore the accumulated behavior of reinforced coarse-grained soils through cyclic triaxial tests and to develop a prediction model for the plastic shakedown limit. Cyclic triaxial test results illustrate that the reinforced specimens, especially those incorporating geocells, demonstrate the lowest accumulated axial strain and the highest plastic shakedown limit when compared to unreinforced ones under identical cyclic loading. Additionally, the accumulated axial strain at the plastic shakedown limit for reinforced specimens is determined. This strain is then used to determine the additional confining pressure exerted by geogrid or geocell, employing a function proposed by Yang and Han. By integrating the additional confining pressure into the plastic shakedown criterion for unreinforced specimens, a prediction model for the plastic shakedown limit in reinforced specimens is ultimately established. The model's applicability and the accuracy of computed additional confining pressure values are validated using experimental data.

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土工合成材料加固粗粒土的塑性动摇极限:实验和预测模型
本研究旨在通过循环三轴试验探索加筋粗粒土的累积行为,并建立塑性震荡极限预测模型。循环三轴试验结果表明,在相同的循环荷载下,与未加固试样相比,加固试样(尤其是包含土工格室的试样)的累积轴向应变最小,塑性破坏极限最高。此外,还确定了加固试样在塑性震动极限时的累积轴向应变。然后,利用 Yang 和 Han 提出的函数,利用该应变确定土工格栅或土工格室施加的额外约束压力。通过将附加约束压力纳入非加固试样的塑性震荡准则,最终建立了加固试样塑性震荡极限的预测模型。实验数据验证了该模型的适用性和计算出的附加约束压力值的准确性。
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来源期刊
Geotextiles and Geomembranes
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.
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