CUTOFF WALL AND ITS EXECUTION METHOD

PROBLEM TO BE SOLVED: To improve reliability on cutoff performance remarkably by driving steel sheet piles into an improved wall constructed by a soil-improvement method and composed of improved-column rows, in which improved columns are built in a series, in a series. SOLUTION: An improved-column r...

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Bibliographische Detailangaben
Hauptverfasser:	FUJII YOSHIBUMI, NAKAMA TETSUSHI, ONISHI TSUNEYASU, KOJIMA HEIZO
Format:	Patent
Sprache:	eng
Schlagworte:	EMBANKMENTS EXCAVATIONS FIXED CONSTRUCTIONS FOUNDATIONS HYDRAULIC ENGINEERING SOIL SHIFTING UNDERGROUND OR UNDERWATER STRUCTURES
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To improve reliability on cutoff performance remarkably by driving steel sheet piles into an improved wall constructed by a soil-improvement method and composed of improved-column rows, in which improved columns are built in a series, in a series. SOLUTION: An improved-column row 10 is constructed as a circle contacting type that the outer circumferences of adjacent improved columns 1... are brought into contact by a soil-improvement method. Steel sheet piles 2... are driven into the improved column row 10 in a series in arrangement, the joint sections 2a... of the steel sheet piles 2 coincide with the centers 1a... of the improved columns 1, before the built improved column row 10 is cured. Finally, the rectangular wall-shaped cutoff wall 3 comprising the improved column row 10 in a series in the length-breadth directions and the steel sheet piles 2 in a series in the similar length-breadth directions along the improved column row 10 is executed. Accordingly, the reliability of cutoff performance can be improved remarkably.