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http://dx.doi.org/10.7843/kgs.2020.36.12.35

Suction Penetration Review of Circular Steel Pipes by Field Test  

Kim, Hyun-Joo (EPS Engrg. Co., Ltd.)
Choi, Jin-O (EPS Engrg. Co., Ltd.)
Publication Information
Journal of the Korean Geotechnical Society / v.36, no.12, 2020 , pp. 35-43 More about this Journal
Abstract
Currently, cofferdams of circular cross section are widely applied as temporary facilities for the installation of bridge foundations in river/sea bridge construction in Korea. Existing caisson, sheet pile, and cell type cofferdam are widely used, but these methods take a lot of time and cost for installation and dismantling. In the case of the existing sheet pile construction method, attention is needed to secure internal and external stability because of the damage to the sheet pile due to ground penetration and difficulty in connecting element members. In this study, penetration design of circular steel pipes using suction pressure was performed on the soft ground of the west coast, and it was confirmed that penetration construction using suction pressure was possible through field tests. It was confirmed that applying the ground analysis results using the cone penetration test (CPT) to the design rather than the standard penetration test (N value) results more similar to the field test results. In addition, it was confirmed that local failure of the inside of the cofferdam was induced when a suction pressure higher than the upper limit suction pressure was applied in the silty sand.
Keywords
Circular steel pipe; Cofferdam; Con penetration test; Field test; Poor subsoil; Suction pressure;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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