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直線形鋼矢板に関する一施工実験報告

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川崎製鉄技報 KAWASAKI STEEL GIHO

Vol. 32(2000) No.1

直線形鋼矢板に関する一施工実験報告

A Driving Test Report on Straight Web Steel Sheet Piling, "KSP-F"

中 川 宏 夫(Hiroo Nakagawa) 橋 本 隆 文 (Takafumi Hashimoto) 堺 信 介 (Shinsuke Sakai) 井上 末富(Suetomi Inoue)

要旨 : 当社の製品である直線形鋼矢版KSP-Fに関して,打込み性能を調査するための施工実 験を行った。主な用途である鋼矢板セル工法を対象に,長さ22mのKSP-Fを直径約 8.9 mの円形に打設し,また2重鋼管矢板壁工法の間仕切り材を想定し,延長約4.8mの直線状 にも打設した。比較的過酷な施工条件になるよう鋼矢版の長さやセルの直径などを設定し, さらにN値25~50 の硬い地盤へ鋼矢版を貫入させたにもかかわらず,爪の離脱もなくスム ーズに打設でき,このような用途におけるKSP-Fの良好な適用性が裏付けられた。 Synopsis :

Straight Web Steel Sheet Piling, "KSP-F", the new products of Kawasaki Steel Corp., have been put to two kinds of driving tests: in one case, the piling was driven into a circular cell with a diameter of 8.9m, while in the other, it was driven into a partition wall 4.8m wide, which is selected taking consideration of the common applications in Japan. In the case of the circular cell, such very severe conditions were imposed: piling as long as 22m; hard soil with N-value of 20-50; and large turning angle of 5.14°per pile. Nevertheless, the piling was driven smoothly without any interlock failure, thus proving the fitness of KSP-F to such severe applications.

(c)JFE Steel Corporation, 2003

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