IN-SITU TEST ON DESATURATION BY AIR INJECTION AND ITS MONITORING

被引：0

作者：

Okamura, Mitsu ^{[1
]}

Takebayashi, Masaya

Nishida, Katsuji

Fujii, Nao

Jinguji, Motoharu

Imasato, Takehiko

Yasuhara, Hideaki ^{[1
]}

Nakagawa, Emiko

机构：

[1] Ehime Univ, Grad Sch Sci & Engn, Matsuyama, Ehime 7908577, Japan

来源：

GROUND IMPROVEMENT TECHNOLOGIES AND CASE HISTORIES | 2010年

关键词：

Degree of saturation; desaturation; liquefaction; electric resistivity; tomography; SATURATION; FLOW;

D O I：

10.3850/GI100

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

Desaturation of ground by air injection attracts considerable attention in resent years as an innovative technique for liquefaction countermeasure. Several research programs have been run in laboratories regarding related topics. This paper describes an in-situ air injection test which aimed to confirm the effectiveness of the air injection to desaturate ground and validity of observation techniques to monitor the evolution of unsaturated zone. Degree of saturation of the in-situ soil was observed using high quality undisturbed samples obtained by the ground freezing method. The degree of saturation ranged between 68% and 98%, which was low enough to almost double the liquefaction resistance of the soil at the site. 3D electric resistivity tomography technique was found to be effective to detect evaluation of the desaturated zone.

引用

页码：151 / 158

页数：8

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