Nippon Steel & Sumitomo Metal’s HAT-type Steel Sheet Piles Adopted for Infrastructure Construction in Singapore and Australia
Jan. 24, 2017
Nippon Steel & Sumitomo Metal Corporation
Nippon Steel & Sumitomo Metal’s HAT-type Steel Sheet Piles Adopted for Infrastructure Construction in Singapore and Australia
Nippon Steel & Sumitomo Metal Corporation (hereinafter referred to as “NSSMC”) has delivered about 1,000 tons of HAT-type steel sheet piles (partially including NS-SP-J steel sheet piles for neighbouring construction) to AVENUE ENGINEERING PTE. LTD., for constructing on earth-retaining walls for PUB’s (Singapore Public Utilities Board) Outlet Drain Project in Singapore, rainwater main pipeline. NSSMC also has delivered about 2,000 tons of HAT-type steel sheet piles to McConnell Dowell for constructing earth retaining walls for the O-BAHN CITY ACCESS PROJECT, a project by the Department of Planning, Transport and Infrastructure of the Government of South Australia, to construct a road tunnel.
NSSMC‘s HAT-type steel sheet piles had been predominantly used for the marine and river works so far. They have been adopted for overseas urban civil works consecutively based on the following three reasons:
[ADVANTAGE 1] Rapid and stable installation
HAT-type steel sheet piles have a width of 900 mm, the world’s widest width of one hot-rolled steel sheet pile as compared with U-type and Z-type steel sheet piles conventionally used (see Fig 1.). They can reduce the number of times of placement from that of U-type steel sheet piles and has a more robust cross-sectional area than Z-type steel sheet piles which can shorten the construction period. This brings about many advantages such as less deformation of the cross-sectional area when a pile is placed and high-accuracy installation. In addition, the joint of the HAT-type is left-right asymmetric and allows one-directional, simple placement, so that construction of high-quality structures can be realized by rapid and stable installation even in a limited narrow space of an urban area.
[ADVANTAGE 2] Considering reduction factor of sectional properties not needed during designing
EUROCODE consideration has been applied for steel sheet pile design in Singapore and Australia. In case of the design of steel sheet pile, it is necessary to consider the reduction factor of sectional properties due to the lack of interlock integrity of the steel sheet pile caused by the interlock slips between steel sheet piles. The Interlock of HAT-type steel sheet pile does not slip because the interlock located on the outermost side of the wall is not affected by the external force caused by soil pressure and water pressure. This makes it possible to streamline the wall structure.
[ADVANTAGE 3] Many variations in size
The HAT-type steel sheet pile comes in four types of cross-sectional shapes (NS-SP-10H, NS-SP-25H, NS-SP-45H, and NS-SP-50H), allowing selection of the best and economical cross section in respect with the necessary cross-sectional performance of an earth-retaining wall.
NSSMC, moving forward with application of its products and solutions to the overseas construction markets such as in the Asia and Pacific region, will contribute to high-quality infrastructure improvement.
Contacts:
Public Relations Center, General Administration Division: +81-3-6867-2977
Overseas Construction Products Engineering Dept., Construction Products Development
Division: +81-3-6867-6355
Nippon Steel & Sumitomo Metal Southeast Asia Pte Ltd.: +65-6223-6777
