Dynamic Centrifuge Tests on Soft Clay Reinforced by Soil-Cement Grids

Abstract

This paper describes the centrifuge model construction procedure for a soft clay profile reinforced by soil-cement grids and presents the results and observations of seismic site response during a preliminary dynamic centrifuge test. These tests are the first in a series of centrifuge tests investigating the stiffening effect of soil-cement grid reinforcement on the seismic response of soft clay sites. The results showed that for high intensity base motions, soil nonlinearity reduced the soil peak horizontal acceleration (PHA) in an unreinforced soil profile, while in a reinforced profile, the surface PGA was greater than the base peak acceleration. The soil-cement grid with Ar=30% and improvement depth/grid spacing = 0.7 did not help reduce the induced excess pore water pressure and settlement in the surrounding soil. However, the settlement of the soil-cement grid was significantly smaller than the surrounding soil settlement.

Meeting Name

International Foundations Congress and Equipment Expo 2015, IFCEE 2015 (2015: Mar. 17-21, San Antonio, TX)

Department(s)

Civil, Architectural and Environmental Engineering

Keywords and Phrases

Cements; Centrifuges; Reinforcement; Seismic Response; Seismology; Soils, Centrifuge Modeling; Excess Pore Water Pressure; Grid Reinforcement; Horizontal Acceleration; Peak Acceleration; Soil Nonlinearity; Stiffening Effect; Surrounding Soils, Soil Cement

International Standard Book Number (ISBN)

978-078447908-7

International Standard Serial Number (ISSN)

0895-0563

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2015 American Society of Civil Engineers (ASCE), All rights reserved.

Publication Date

01 Mar 2015

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