Seismic response evaluation of sites improved by deep mixing, Part I: Proposed approach

doi:10.1680/grim.2008.161.3.153

Seismic response evaluation of sites improved by deep mixing, Part I: Proposed approach

Authors: R. V. Siddharthan ¹ ; A. Porbaha ²
Source: Proceedings of the ICE - Ground Improvement, Volume 161, Issue 3, pages 153 –162 , ISSN: 1755-0750, E-ISSN: 1755-0769

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Ground Improvement provides a fast-track vehicle for the dissemination of news in technological developments, feasibility studies and innovative engineering applications for all aspects of ground improvement, ground reinforcement and grouting.

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It covers a wide range of civil and environmental engineering applications, including analytical advances, performance evaluations, pilot and model studies, instrumented case-histories and innovative applications of existing technology.
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In this subject: Environment, Construction Materials, Sitework, Ground Engineering
By this author: R. V. Siddharthan , A. Porbaha

The objective of this paper is to develop a simplified design procedure to aid designers in selecting the optimum design of deep-mixing (DM) dimensions for a site treated using DM technology. This was accomplished based on a parametric study that focused on the influence of many important variables that affect the seismic behaviour of DM-treated soils. A two-dimensional effective stress program (TARA-2M) was used in the parametric study. The procedures developed provide the residual pore water pressure at DM-treated sites at various locations within and around the DM columns. The proposed simplified approach extends the routinely used and well-established liquefaction evaluation procedure for one-dimensional soil deposits to DM-treated sites based on seismic response results from the TARA-2M parametric study. The companion paper presents the verification of the proposed approach.

Keywords: seismic engineering; geotechnical engineering; foundations
Document Type: Research Article
DOI: 10.1680/grim.2008.161.3.153
Affiliations: 1: Department of Civil Engineering, University of Nevada Reno, USA; 2: Department of Civil Engineering, California State University Sacramento, USA

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Seismic response evaluation of sites improved by deep mixing, Part I: Proposed approach