Large scale plate loading tests of refuse soil

A large-scale field testing program for the study of residual forces in pre-stressed high-strength concrete (PHC) pipe piles is presented in this paper. Five open-ended PHC pipe piles with 13 or 18 m in embedded length were installed and used for static loading tests at a building site in Hangzhou, China. All the piles were instrumented with fiber Bragg grating (FBG) strain gauges. The residual forces in these piles were recorded during and after installation. The measured load transfer data along a pile during the static loading tests are reported. The effect of the residual force on the interpretation of the load transfer behavior is discussed. The field data show that residual force along the installed pile increases approximately exponentially to the neutral plane and then reduces towards the toe. The residual force decreases with time to a stable value after pile jacking due to the secondary interaction between the pile and the disturbed soil around the pile and other factors. The large residual forces along the PHC pipe piles significantly affect the evaluation of the pile load distributions, and thus the shaft and toe resistances. The conventional bearing capacity theory tends to overestimate the shaft resistance at positions above the neutral plane and underestimate the shaft resistance at positions below the neutral plane, and the toe resistance for an open-ended PHC pipe piles founded in stratified soils.

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Discussion of “ Large‐Scale Loading Tests of Shallow Footings in Pneumatic Caisson ” by Osamu Kusakabe, Yoshito Maeda, and Masatoshi Ohuchi (November, 1992, Volume 118, No. 11)

Journal of Geotechnical Engineering ◽

10.1061/(asce)0733-9410(1994)120:6(1106) ◽

1994 ◽

Vol 120 (6) ◽

pp. 1106-1108

Author(s):

Yakov M. Reznik

Keyword(s):

Large Scale ◽

Loading Tests

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Ductility Improvement of Steel Columns with Corner Plates Based on Large-Scale Cyclic Loading Tests

Stability and Ductility of Steel Structures (SDSS'97) ◽

10.1016/b978-008043320-2/50029-0 ◽

1998 ◽

pp. 327-336

Author(s):

T. Terayama ◽

H. Otsuka ◽

K. Nishikawa ◽

J. Murakoshi

Keyword(s):

Cyclic Loading ◽

Large Scale ◽

Steel Columns ◽

Loading Tests ◽

Cyclic Loading Tests

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Foundation design for the Skydome Stadium, Toronto

Canadian Geotechnical Journal ◽

10.1139/t89-003 ◽

1989 ◽

Vol 26 (1) ◽

pp. 22-33 ◽

Cited By ~ 1

Author(s):

K. Y. Lo ◽

B. H. Cooke

Keyword(s):

Size Effect ◽

Laboratory Tests ◽

Geological Mapping ◽

Foundation Design ◽

Field Plate ◽

Deformation Properties ◽

Rock Mass Modulus ◽

Strength And Deformation ◽

Loading Tests ◽

Plate Loading

The construction of the Skydome Stadium will provide Toronto with the first multipurpose stadium in the world with a retractable roof. The foundation for the structure, with a diameter of about 210 m and a height of about 86 m, will be supported by several hundred columns, about 100 of which will have loadings up to 50 000 kN. The foundation rock is a shale with numerous highly weathered zones and clay seams. Laboratory tests to investigate the strength and deformation properties of these weak layers were performed. Field plate loading tests at two locations with three different size plates were also carried out to study the size effect on the mass modulus of the rock. This paper presents the results of detailed geological mapping and field and laboratory tests together with design considerations for the foundations. The field acceptance criteria, developed to ensure that the differential settlements between foundations are within specified limits, are also discussed. Key words: Skydome, shale, clay seams, plate loading tests, rock-mass modulus, size effect, layered rocks.

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