Centrifuge model tests on backfill stability

1986 ◽  
Vol 23 (3) ◽  
pp. 341-345 ◽  
Author(s):  
Robert J. Mitchell
Keyword(s):  
Key Words ◽  
Model Tests ◽  
Unconfined Compression ◽  
Cemented Sand ◽  
Mine Backfill ◽  
Geotechnical Centrifuge ◽  
Centrifuge Model ◽  
Centrifuge Tests ◽  
Behavioural Effects ◽  
Centrifuge Model Tests

The 6 m diameter, 30 g-tonne geotechnical centrifuge at Queen's University is described. Results from eight model tests, carried out on plain cemented sand samples representing mine backfills, are presented. These data show that the stable prototype backfill heights obtained from centrifuge tests exceed the failure heights predicted from unconfined compression testing by factors averaging about 1.8. This factor is explained by a combination of geometrical and behavioural effects. Still photographs of typical backfill failures in the centrifuge are included and these indicate that unacceptable ore dilution and recovery costs would be associated with the prototype failures in plain cemented tailings backfills. Key words: geotechnical centrifuge, mine backfill, model tests, cemented sand.

Numerical Simulation and Analysis of Centrifuge Model Tests with Nonhomogeneous Materials in Geotechnical Engineering

2013 ◽  
Vol 353-356 ◽  
pp. 495-501
Author(s):  
Lie Xian Tang ◽  
Lian Jun Guo ◽  
Da Ning Zhang ◽  
Jian Ming Zheng
Keyword(s):  
Numerical Simulation ◽  
Model Test ◽  
Geotechnical Engineering ◽  
Model Tests ◽  
Centrifuge Model Test ◽  
Test Model ◽  
Geotechnical Centrifuge ◽  
Centrifuge Model ◽  
Centrifuge Tests ◽  
Centrifuge Model Tests

The primary methods are antetype observation and model tests which to check the actual engineering status in geotechnical engineering field. The antetype observation is the best direct and convictive method, but approach miscellaneous and spend hugely. The general model tests can not fulfil the same stress between model and antetype. Geotechnical centrifuge model test can not only minish the measure of model and fulfil the comparability condition, but also can found all kinds of non-symmetrical models and simulation all kinds of complicated engineering. So the geotechnical centrifuge model test is applied widely in the geotechnical engineering. This paper used the RFPA-Centrifuge and recured to the principle of geotechnical centrifuge model test, evaluated the safety of model only by increase the physical strength. Though the numerical calculating in nonhomogeneous models with different scales showed that stress, displacement and failure mode were accord with conform ratio of centrifuge model tests. Showed the advantage that the results of RFPA can be validated each other with results of physical tests. For some specifical complicated items in geotechnical engineering, make a good test model is not only very hard and have to spend much time, but also need expensive test equipment and much money for test materials. It is very good if we can use a method to conquer these shortages. So it is advisable that using the mechod which geotechnical centrifuge tests combine RFPA-Centrifuge numerical simulation analysis method.

Blast Wave Effect on Apparatus and Propagation Laws in Dry Sand in Geotechnical Centrifuge Model Tests

2011 ◽  
Vol 105-107 ◽  
pp. 626-629 ◽  
Author(s):  
Yi Kai Fan ◽  
Xiang Qian Liang ◽  
Xin Huang ◽  
Xue Dong Zhang
Keyword(s):  
Blast Wave ◽  
Empirical Relation ◽  
Model Tests ◽  
Peak Acceleration ◽  
Wave Effect ◽  
Geotechnical Centrifuge ◽  
Centrifuge Model ◽  
Dry Sand ◽  
Increasing Function ◽  
Centrifuge Model Tests

7 geotechnical centrifuge model tests for buried explosion in dry sand were investigated by using 450 g-t geotechnical centrifuge apparatus. Blast wave effect on apparatus and propagation laws in dry sand were studied under the conditions of different explosive charges and different centrifuge acceleration levels. 11 accelerometers were buried around the explosives for recording the acceleration response in sand. Other 1 accelerometer was installed on the centrifuge arm to monitor blast wave effect on centrifuge apparatus. The results demonstrate that: The effect of blast wave on centrifuge apparatus can be ignored. The peak acceleration is a power increasing function of the acceleration level. An empirical relation of exponent can be found between the proportional peak acceleration and the proportional distance.

Geotechnical centrifuge model tests for explosion cratering and propagation laws of blast wave in sand

2012 ◽  
Vol 13 (5) ◽  
pp. 335-343 ◽  
Author(s):  
Yi-kai Fan ◽  
Zu-yu Chen ◽  
Xiang-qian Liang ◽  
Xue-dong Zhang ◽  
Xin Huang
Keyword(s):  
Blast Wave ◽  
Model Tests ◽  
Geotechnical Centrifuge ◽  
Centrifuge Model ◽  
Centrifuge Model Tests

Experimental Study on Stresses Distribution under Embankment

2011 ◽  
Vol 97-98 ◽  
pp. 17-22
Author(s):  
Hong Bing Xiao ◽  
Guan Lu Jiang
Keyword(s):  
Experimental Study ◽  
Numerical Analysis ◽  
High Speed ◽  
Model Tests ◽  
High Speed Railway ◽  
Geotechnical Centrifuge ◽  
Centrifuge Model ◽  
Side Slope ◽  
Simplified Method ◽  
Centrifuge Model Tests

For high-speed railway subgrade settlement, there was usually a big difference between calculated and measured value. Studying the stresses distribution under embankment, giving more accurate simplified method，was a approach to improve the accuracy of calculated settlement. The stresses distribution under embankment were studied through tests on experimental embankment segment, geotechnical centrifuge model tests, and numerical analysis and calculation. Studies showed that the measured stresses distribution was curve, the stresses under the embankment centre were highest, under the vicinity of shoulder the stresses changed smoothly, the stresses was above zero at toe of the side slope.

Geotechnical Centrifuge Shaking Table Tests and Numerical Simulation of Soil-Structure

2012 ◽  
Vol 256-259 ◽  
pp. 372-376 ◽  
Author(s):  
Jing Bo Liu ◽  
Dong Dong Zhao ◽  
Wen Hui Wang ◽  
Xiang Qing Liu
Keyword(s):  
Numerical Simulation ◽  
Soil Structure ◽  
Shaking Table ◽  
Vertical Line ◽  
Shaking Table Tests ◽  
Geotechnical Centrifuge ◽  
Centrifuge Model ◽  
Soil Structures ◽  
Input Motion ◽  
Centrifuge Model Tests

Two geotechnical centrifuge model tests of a soil-structure system with different burial depths are performed to investigate the interaction between soil and structure. The tests are performed at 50 gravitational centrifuge accelerations and the input motion is Kobe wave. This paper focuses on the accelerations and displacements in the soil-structures system. The peak accelerations and displacements along the axis of the structure and along the vertical line 17cm away from the axis are presented. The acceleration and displacement response due to the interaction between soil and structure are studied.

Evaluation of the seismic response of stone pagodas using centrifuge model tests

2014 ◽  
Vol 12 (6) ◽  
pp. 2583-2606 ◽  
Author(s):  
Heon-Joon Park ◽  
Dong-Soo Kim ◽  
Yun Wook Choo
Keyword(s):  
Seismic Response ◽  
Model Tests ◽  
Centrifuge Model ◽  
Centrifuge Model Tests

scholarly journals Evaluation of seismic behavior of box culvert buried in the ground through centrifuge model tests and numerical analysis

2019 ◽  
Vol 4 (2) ◽  
pp. 147-167 ◽  
Author(s):  
Hitoshi Yatsumoto ◽  
Yasuo Mitsuyoshi ◽  
Yasuo Sawamura ◽  
Makoto Kimura
Keyword(s):  
Numerical Analysis ◽  
Seismic Behavior ◽  
Model Tests ◽  
Centrifuge Model ◽  
Box Culvert ◽  
Centrifuge Model Tests
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