Journal Published Online: 01 September 2023
Volume 47, Issue 2

Staged Embankment Construction in Geotechnical Centrifuges

CODEN: GTJODJ

Abstract

This study develops a novel apparatus to simulate the staged, automatic construction of embankments in geotechnical centrifuges with improved measurement accuracy. Modular test equipment was designed to incorporate the functionality of controllable and precise sand release; its structural components include a box-like sand storage module, a push-pull sand release module, and a stepper motor control module. Emphasis was placed on the design of segmented deflectors, the angles of which were derived with rigorous mathematical analysis to mitigate the Coriolis effect on falling sand. Calibration tests demonstrate that the post-construction embankment geometry approximates its target shape with a relative error of 0.72 to 7.37 % in different construction phases at an acceleration of 60 g. A trial was conducted on a staged embankment over the deformable ground, and the displacement of this system was monitored and characterized by tracking reflective marker technology. The results indicate that the proposed method is effective and reflects real-life situations.

Author Information

Liu, Hongyang
School of Civil Engineering, Southwest Jiaotong University, Chengdu, China
Luo, Qiang
School of Civil Engineering, Southwest Jiaotong University, Chengdu, China Ministry of Education Key Laboratory of High-Speed Railway Engineering, Chengdu, China
Wang, Tengfei
Ministry of Education Key Laboratory of High-Speed Railway Engineering, Chengdu, China School of Civil Engineering, Southwest Jiaotong University, Chengdu, China
Jiang, Liangwei
School of Civil Engineering, Southwest Jiaotong University, Chengdu, China Ministry of Education Key Laboratory of High-Speed Railway Engineering, Chengdu, China
Yang, Hongsheng
Ministry of Education Key Laboratory of Impact and Safety Engineering, Ningbo University, Ningbo, China
Pages: 23
Price: $25.00
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Details
Stock #: GTJ20220274
ISSN: 0149-6115
DOI: 10.1520/GTJ20220274