scholarly journals Prefailure Deformation of Nailed Deep Excavations under Surcharge by Centrifuge Model Test

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
S. Mohammad. Shoari Shoar ◽  
Ali A. Heshmati ◽  
Hossein Salehzadeh
Keyword(s):  
Model Test ◽  
Fracture Mechanism ◽  
Ground Surface ◽  
Centrifuge Model Test ◽  
Lateral Deformation ◽  
Ground Settlement ◽  
Deep Excavations ◽  
Centrifuge Model ◽  
Centrifuge Tests ◽  
The Moment

To study prefailure deformations in nailed deep vertical excavations under various surcharges, four centrifuge tests were used to explain the lateral deformation of facing, the fracture mechanism of cement facing, and the settlement profile of the ground surface. The soil used in this research was Firoozkooh sand No. 161. Both surcharge applying and excavation were performed at 40 g acceleration. The depth of the excavation was 30 cm, the length of the nail varied from H/3 to 2H/3 (H: excavation depth), and the nails were installed horizontally. The nails were made of brass pipes and then sand coated. The results showed that the effect of surcharge on the lateral deformation of the facing as well as the fracture mechanism of facing is obvious. Also, it was seen that the ground settlement profile is two-line or three-line at the moment of facing fracture and is affected by surcharge.

A New Method based on Centrifuge Model Test for Evaluating Ground Settlement Induced by Tunneling

2019 ◽  
Vol 23 (6) ◽  
pp. 2426-2436 ◽  
Author(s):  
Hongpeng Lai ◽  
Jian Zhang ◽  
Lianyang Zhang ◽  
Rui Chen ◽  
Wanjing Yang
Keyword(s):  
Model Test ◽  
New Method ◽  
Centrifuge Model Test ◽  
Ground Settlement ◽  
Centrifuge Model

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.

Inclined Loading Capacity of Embedded Suction Anchors in Clay

2009 ◽  
Author(s):  
Y. S. Kim ◽  
K. O. Kim ◽  
Y. Cho ◽  
S. Bang ◽  
K. D. Jones
Keyword(s):  
Analytical Solution ◽  
Model Test ◽  
Inclination Angle ◽  
Load Application ◽  
Centrifuge Model Test ◽  
Loading Capacity ◽  
Test Results ◽  
Pullout Capacity ◽  
Centrifuge Model ◽  
Inclined Loading

An analytical solution has been developed to estimate the inclined pullout capacity of an embedded suction anchor in clay seafloor. Validation has been made through comparisons with a limited number of centrifuge model test results. Results indicate that the inclined pullout capacity of an embedded suction anchor in clay decreases as the load inclination angle to the horizontal increases. As the point of the load application moves downward, the inclined pullout capacity increases, reaches its peak, and then starts to decrease.

scholarly journals DYNAMIC CENTRIFUGE MODEL TEST ON PILED GEO-WALL

2009 ◽  
Vol 24 ◽  
pp. 257-262
Author(s):  
Takashi HARA ◽  
Shinichiro TSUJI ◽  
Atsushi Yashima ◽  
Naoki TATTA
Keyword(s):  
Model Test ◽  
Centrifuge Model Test ◽  
Centrifuge Model
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