Journal Published Online: 31 March 2025
Volume 48, Issue 3

A True Triaxial Apparatus for Soil Testing with Three-Dimensional Rigid Boundary

CODEN: GTJODJ

Abstract

In this paper, we introduce a three-dimensional triaxial apparatus with rigid walls. Its pressure chamber comprises four sliding rigid plates, a rigid specimen cap, and a rigid bottom plate. It has a three-dimensional servo hydraulic load control system, an intelligent control and data storage system, and a water-air suction control system. Considering a cuboid soil specimen as a true triaxial shear layer and a vertical principal stress transfer layer, the vertical principal stress is transferred from the transfer layer to the shear layer, and the orthogonal horizontal principal stress is applied by the horizontal slip rigid plates. That solves the technical problem of mutual interference observed in conventional three-dimensional rigid plate loading. The L-shaped loading plate is improved, which reduces the deflection and friction between them. Linear guides ensure that the horizontal stress is applied synchronously and the specimen is always centered during a test. True triaxial testing of Xi’an loess is reported, and the results confirm the applicability of the apparatus in soil testing.

Author Information

Wang, Ze-Chi
School of Civil and Architecture Engineering, Xi’an University of Technology, Xi’an, Shaanxi Province, China
Shao, Shuai
School of Civil and Architecture Engineering, Xi’an University of Technology, Xi’an, Shaanxi Province, China Shaanxi Provincial Key Laboratory of Loess Mechanics and Engineering, Xi’an, Shaanxi Province, China
Shao, Sheng-Jun
School of Civil and Architecture Engineering, Xi’an University of Technology, Xi’an, Shaanxi Province, China Shaanxi Provincial Key Laboratory of Loess Mechanics and Engineering, Xi’an, Shaanxi Province, China
Wu, Hao
School of Civil and Architecture Engineering, Xi’an University of Technology, Xi’an, Shaanxi Province, China
Zhang, Shao-Ying
School of Civil and Architecture Engineering, Xi’an University of Technology, Xi’an, Shaanxi Province, China
Pages: 15
Price: $25.00
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Details
Stock #: GTJ20240057
ISSN: 0149-6115
DOI: 10.1520/GTJ20240057