Analysis of loess fracture on slope stability based on centrifugal model tests

2021 ◽  
Author(s):  
Yuxiang Cheng ◽  
Aidi Huo ◽  
Zhixin Zhao ◽  
Jianbing Peng
Keyword(s):  
Slope Stability ◽  
Model Tests ◽  
Centrifugal Model

Use of centrifugal model testing to assess slope stability

1978 ◽  
Vol 15 (1) ◽  
pp. 14-31 ◽  
Author(s):  
A. N. Schofield
Keyword(s):  
Heat Transfer ◽  
Slope Stability ◽  
Model Tests ◽  
Material Behaviour ◽  
Total Stress ◽  
End Effects ◽  
Soil Material ◽  
Reconstituted Soil ◽  
Centrifugal Model ◽  
Small Models

Centrifugal model tests increase total stress levels in small models made of natural or reconstituted soil, and allow direct observation of repeated failures. A novel use of a basket centrifuge is described in which slopes can be tested without end effects. When a series of models at various overconsolidation ratios was tested to failure the error in the safety factor predicted by a total stress analysis increased with the overconsolidation ratio. Other centrifuges are discussed and the advantage of large machines with balanced arms and swinging carriages are explained. Soil material behaviour discussed includes heat transfer and leaching. The paper concludes with a review of the present availability of and prospects for centrifugal model tests.

Study on the Testing Auxiliary System of a Large Scale Centrifugal Shaker

2011 ◽  
Vol 368-373 ◽  
pp. 959-962
Author(s):  
Yong Zhi Wang ◽  
Xiao Ming Yuan ◽  
Rui Sun
Keyword(s):  
Data Acquisition ◽  
Large Scale ◽  
Image Acquisition ◽  
Model Tests ◽  
Auxiliary System ◽  
Basic Design ◽  
Data Acquisition Systems ◽  
Design Requirements ◽  
Centrifugal Model ◽  
And Function

By special advantages and progress of dynamic centrifugal model tests, construction and development of large scale centrifugal shakers are driven. As one subsystem of a large scale centrifugal shaker, the testing auxiliary system is used to data acquisition, image acquisition and model making. The perfect design and construction of a testing auxiliary system must give a guarantee for dynamic centrifugal model tests. This paper outlines the components and function of the testing auxiliary system of a large scale centrifugal shaker. The basic design requirements and critical techniques relevant to data acquisition systems, image acquisition systems and containers are analyzed according to the characteristics of dynamic centrifugal model tests on a large scale centrifugal shaker, meanwhile, some specific conception and design suggestions are proposed. The results can offer some references for design of the testing auxiliary system of a large scale centrifugal shaker.

J192015 Centrifugal Model Tests for Stability Evaluation of Lunar Sandbag Wall

2011 ◽  
Vol 2011 (0) ◽  
pp. _J192015-1-_J192015-5
Author(s):  
Daisuke INOUE ◽  
Yoshitaka YANAGIHARA ◽  
Hiroshi UENO ◽  
Shinichiro NISHIDA
Keyword(s):  
Model Tests ◽  
Stability Evaluation ◽  
Centrifugal Model

Application of Centrifugal Model Tests in the Preliminary Support of the Tunnel: A Review

2014 ◽  
Vol 1049-1050 ◽  
pp. 242-245
Author(s):  
Jun Ling Qiu ◽  
Jin Xing Lai
Keyword(s):  
Boundary Conditions ◽  
Stress Level ◽  
Future Development ◽  
Geotechnical Engineering ◽  
Model Tests ◽  
Structure Model ◽  
Related Research ◽  
Modeling Technology ◽  
Centrifugal Model ◽  
Preliminary Support

Centrifugal modeling technology has been applied to geotechnical engineering for more than half a century. It has been an important and indispensible means to simulate the geotechnical behavior because it has the same material, the similar boundary conditions and the same stress level. And it is also commonly used in tunnel-related research. Centrifugal tests of pipe-roof and small pipe grouting in tunnel were analyzed, the important effects of centrifugal tests on preliminary support of the tunnel were also emphasized. Problems often met in model tests of tunnelling were solved, such as structure model, modeling soil, preliminary support model and general programming of experiment proposal. The future development of centrifuges in tunnelling is also presented.

scholarly journals Numerical Study for Centrifugal Model Tests of a Single Pile Foundation Installed in Sandy Deposits

2007 ◽  
Vol 23 (4) ◽  
pp. 389-398 ◽  
Author(s):  
C. W. Lu
Keyword(s):  
Numerical Simulation ◽  
Pile Foundation ◽  
Numerical Study ◽  
Computation Time ◽  
Model Tests ◽  
Unit Weight ◽  
Single Pile ◽  
3D Fem ◽  
Static Tests ◽  
Centrifugal Model

AbstractIt is believed that a dynamic analysis is urgently required to provide a more reliable numerical method for seismic evaluation of a full system, which includes foundation, super structure, and ground in earthquake zones such as Taiwan and Japan. A centrifugal model test of pile foundation is simulated numerically using a three-dimensional finite-element model (3D-FEM) code in this study. In the numerical simulation, parameters of the sandy soils in tij model that are derived from accumulated experiences in static tests are first calibrated by centrifugal vibration tests of sandy ground. Model tests of a single pile foundation installed in grounds of same unit weight of soil as in the static tests are then simulated using the calibrated parameters. The numerical simulation resulted in a good agreement with the corresponding physical model tests. By comparing the computed and the observed results, one can find and confirm that it is necessary to employ an appropriate soil model to reproduce dynamic soil behavior due to major vibration. Representation of pile by beam element in the numerical analysis is applicable when attention is paid on the response acceleration of top of pile foundation, on soils at some distances to the pile foundation, and on bending moment of the pile in a stiffer ground. Equal-displacement boundary condition for two-side boundaries is proven to be efficient. To reduce the computation time, the assumption of a constant damping of viscous matrix is acceptable.

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