SYNOPSIS

The application of Hat type steel sheet pile can improve the performance of retaining wall, revetment, wharf, and so on because of its features and advantages as compared with conventional sheet pile. Hat type sheet pile has 900mm width, which is the widest among the hot-rolled monopiles in the world, thus it can reduce the number of sheet piles required for the wall elongation, total　construction periods and costs.

Furthermore, as technical perspective, Hat type sheet pile can achieve full-shear force transmission at the interlocks because their connections are located at the outer edge of the wall. To verify this performance as compared with conventional one, a lateral load test had been　conducted in Singapore, which is based on ground conditions specified to ASEAN.

As the result, it　is confirmed that the flexural stiffness of Hat type sheet pile is higher than conventional one, because its interlocks could achieve the full-share transmission mode in contrast to the reduction of share force transmission of conventional U type sheet pile wall, according to structural theory. This indicates that the application of Hat type sheet pile can contribute for the improvement of structural reliability, and construction productivity in Malaysia.


SPEAKER BIODATA

Dr. Kazutaka OTSUSHI,
Senior Manager, Nippon Steel Southeast Asia Pte Ltd

Dr. Otsushi graduated from Civil Engineering at Kyoto University, Japan, in 2002. He, then, obtained his Doctoral Degree (Dr. Eng.), and engaged in Geotechnical, Earthquake, Disaster Prevention Engineering.

Dr. Otsushi is currently a Senior Manager with Nippon Steel Southeast Asia Pte, Ltd. as civil engineer, covering the region that includes Malaysia, Singapore, Philippines and ASEAN Countries. He is in-charged of Research & Development, Market Development in ASEAN and Technical Support of Steel Sheet Pile Technology, Design and Construction in Singapore