Lateral earth pressure acting on underground retaining structure in clay ground under embankment based on centrifuge model tests

2004 ◽  
Vol 8 (4) ◽  
pp. 387-396 ◽  
Author(s):  
Eun Sang Im ◽  
Tai Hun Kim
Keyword(s):  
Earth Pressure ◽  
Model Tests ◽  
Retaining Structure ◽  
Centrifuge Model ◽  
Lateral Earth Pressure ◽  
Clay Ground ◽  
Centrifuge Model Tests

Stress-level effects in model tests on piles

1994 ◽  
Vol 31 (1) ◽  
pp. 28-41 ◽  
Author(s):  
William H. Craig ◽  
Suhail K. Sabagh
Keyword(s):  
Stress Level ◽  
Laboratory Experiments ◽  
Earth Pressure ◽  
Model Tests ◽  
Overburden Pressure ◽  
Centrifuge Model ◽  
Angle Of Friction ◽  
Lateral Earth Pressure ◽  
Widespread Belief ◽  
Centrifuge Model Tests

Results are presented from several series of centrifuge model tests of piles installed in beds of uniform dry sand. Using identical model geometries, but varying acceleration factors, the tests demonstrate quite clearly the nature and extent of stress-level variations on the performance of piles. The results are interpreted initially in terms of bearing capacity coefficients Nt and lateral earth pressure coefficients Ks, and subsequently in terms of angle of friction [Formula: see text], determined using available relationships. Controlled laboratory experiments with varying levels of overburden pressure around the piles indicated consistent reductions in Nt, and to a lesser extent in Ks. Quantitative interpretations in terms of angle of friction variations depend on selection from a range of empirical correlations available and have been made for two of those commonly used. Comparison of shaft loads in compression and extension confirms the widespread belief that there is a difference, which is found to vary quantitatively depending on the relative density. Key words : model tests, piles, sand, centrifuge, stress level.

Study on the Deformation of Retaining Structure of Pit-in-Pit Excavation

2011 ◽  
Vol 243-249 ◽  
pp. 2903-2908 ◽  
Author(s):  
Jun Shuai Huo ◽  
Juan Chen ◽  
Quan Mei Gong ◽  
Shun Hua Zhou
Keyword(s):  
Numerical Analysis ◽  
Natural History ◽  
Critical Distance ◽  
Model Tests ◽  
Diaphragm Wall ◽  
Retaining Structure ◽  
Centrifuge Model ◽  
Shanghai Museum ◽  
Diaphragm Walls ◽  
Centrifuge Model Tests

There are more and more pit-in-pit excavations in cities, which include inner pit and outer pit. Owing to the inner pit excavation, pit-in-pit problem aroused and brought about accidents. For this reason, based on the co-construction, deep, and large pit-in-pit of Shanghai Museum of Natural History and Metro Line 13, the excavation influence between inner pit and outer pit was analyzed. The deformation of underground diaphragm wall under the condition of three different distances between outer pit and inner pit were compared through centrifuge model tests. Then, the effect of excavation width of outer pit on underground diaphragm walls was researched through numerical analysis. Results show that the deformation of outer underground diaphragm wall increased with the excavation width of outer pit, for the inner pit, the opposite was true. The critical influence distance between outer pit and inner pit was within 22 meter and 24 meter. According to the critical distance, the area adverse to excavation pit stability was identified.

scholarly journals Centrifuge model tests on earth pressure and deformation of sewer trunk culverts

2010 ◽  
Vol 5 (3) ◽  
pp. 479-496
Author(s):  
Akitaka OHSUGI ◽  
Jun TOHDA ◽  
Hiroshi YOSHIMURA ◽  
Yuji INOUE
Keyword(s):  
Earth Pressure ◽  
Model Tests ◽  
Centrifuge Model ◽  
Centrifuge Model Tests
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