Journal Published Online: 16 December 2008
Volume 32, Issue 2

Pile Settlement and Uplift in Liquefying Sand Deposit

CODEN: GTJODJ

Abstract

This paper describes a test program using explosives to induce excess pore pressure in a large deposit of saturated sand supporting two friction piles (W150×18 SI wide-flange beams). Variables studied were pile settlement and uplift versus the pore pressure ratio, initial static safety factor of the piles, and peak particle velocity. Little or no vertical pile movement occurred for the tension or compression pile when the pile-soil interface pore pressure ratio (PPR) was less than 0.2 or 0.5, respectively. The tension pile with a static safety factor of 1.4 uplifted over four times the pile’s width when the PPR exceeded about 0.6. The compression pile with a static safety factor of 2.7 settled 0.1 and 4 times the pile’s width when the PPR exceeded about 0.6 and 0.9, respectively. Results parallel earlier model laboratory studies.

Author Information

Charlie, Wayne
Colorado State University, Fort Collins, CO
Allard, David
CH2M HILL, Tempe, AZ
Doehring, Donald
Colorado State University, Fort Collins, CO
Pages: 10
Price: $25.00
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Details
Stock #: GTJ101636
ISSN: 0149-6115
DOI: 10.1520/GTJ101636