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Seismic Soil-Pile-Structure Interaction in Improved Soft Clay: Centrifuge Tests
Improving the soft clay surrounding an existing pile group is an innovative, and cost efficient solution to restrict lateral displacements. However, this technique is not widely used in seismic regions due to lack of fundamental understanding of the behavior of improved and unimproved soils. Through a series of centrifuge tests, the seismic response of closely spaced groups of piles in unimproved and CDSM (cement deep soil mixing) improved soft clays was investigated. The soil profile consisted of four lightly overconsolidated clay layers overlaying a dense layer of Nevada sand. The piles in the groups were spaced at 3.0 pile diameters and had a 2 × 2 symmetrical configuration in the plan and were fixed to a rigid cap (superstructure) placed above the ground level. The centrifuge test results revealed that improving the ground was useful in decreasing displacement of the superstructure. The peak displacement of the superstructure of the improved pile group (GIL) was 18 cm compared to 25 cm for the superstructure of the pile group in the unimproved soft clay.
Seismic Soil-Pile-Structure Interaction in Improved Soft Clay: Centrifuge Tests
Improving the soft clay surrounding an existing pile group is an innovative, and cost efficient solution to restrict lateral displacements. However, this technique is not widely used in seismic regions due to lack of fundamental understanding of the behavior of improved and unimproved soils. Through a series of centrifuge tests, the seismic response of closely spaced groups of piles in unimproved and CDSM (cement deep soil mixing) improved soft clays was investigated. The soil profile consisted of four lightly overconsolidated clay layers overlaying a dense layer of Nevada sand. The piles in the groups were spaced at 3.0 pile diameters and had a 2 × 2 symmetrical configuration in the plan and were fixed to a rigid cap (superstructure) placed above the ground level. The centrifuge test results revealed that improving the ground was useful in decreasing displacement of the superstructure. The peak displacement of the superstructure of the improved pile group (GIL) was 18 cm compared to 25 cm for the superstructure of the pile group in the unimproved soft clay.
Seismic Soil-Pile-Structure Interaction in Improved Soft Clay: Centrifuge Tests
Taghavi, Amirata (author) / Muraleetharan, Kanthasamy K. (author) / Miller, Gerald A. (author) / Cerato, Amy B. (author)
IFCEE 2015 ; 2015 ; San Antonio, Texas
IFCEE 2015 ; 2410-2419
2015-03-17
Conference paper
Electronic Resource
English
SEISMIC SOIL-PILE-STRUCTURE INTERACTION IN IMPROVED SOFT CLAY: CENTRIFUGE TESTS
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