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RESEARCH PAPERS

Effectiveness of Anti-Liquefaction Techniques for Buried Pipelines

[+] Author and Article Information
T. Akiyoshi

Department of Civil and Environmental Engineering, Kumamoto University, Kumamoto 860, Japan

K. Fuchida

Department of Civil and Architectural Engineering, Yatsushiro College of Technology, Yatsushiro 866, Japan

S. Shirinashihama

Tekken Kensetsu Corporation, Narita, Chiba 286, Japan

T. Tsutsumi

Department of Civil Engineering, Fukushima College of Technology, Iwaki 970, Japan

J. Pressure Vessel Technol 116(3), 261-266 (Aug 01, 1994) (6 pages) doi:10.1115/1.2929585 History: Received November 19, 1992; Revised February 16, 1994; Online June 17, 2008

Abstract

In this paper, effectiveness of several existing anti-liquefaction methods for preventing large deformations of pipelines for lateral flow of liquefied grounds during earthquakes are investigated and compared, as well as a proposed method which fixes pipelines with expansion joints parallel to auxiliary continuous pipes using iron tie-plates. Stiffness of liquefied soils around pipes is represented as a static coefficient of subgrade reaction, based on the experiments on the interaction between liquefied sand deposits and pipes. Pipeline-spring systems which are characterized by those coefficients are analyzed based on the theory of “a beam on an elastic foundation” and transfer matrix method. Computations are performed with respect to the key parameters of pipes, coefficient of subgrade reaction, and several fixing conditions between pipes and underground structures. The sliding displacements of pipelines, rotational angles of joints, and stresses of pipelines are compared for such anti-liquefaction methods as soil-improving methods (sand-compaction pile or ballast-replaced soil methods) and structural-stiffening methods (parallel pipe or pile-supporting methods).

Copyright © 1994 by The American Society of Mechanical Engineers
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