STEEL SHEET PILE

WIPO Patent Application WO/2015/159434

A1

A steel sheet pile for which a workability evaluation coefficient (C) and an economic evaluation coefficient (E) expressed by formulas (18, 19) below satisfy any of the following conditions (24 - 28) below when the unit weight of the soil of the target foundation (γ) is 1.8×10-8 kN/mm3, the coefficient of friction (μ) between the soil and the steel sheet pile is tan 15°, the Rankine passive earth pressure coefficient (ν) is tan2(45°+(√15×N+15)/2), the N value is 20, and the installation depth (Zν) is 15000 mm. C=Fclosure/A (18) E=A0/Ze (19) 0.12 ≤ C ≤ 0.66 and -0.0225×C+0.066 ≤ E ≤ 0.08 (24) 0.66