Patent ID: 8678713

Claim:
A hat-type steel sheet pile in which web portions are continuously formed at both ends of an upper flange portion, and lower flange portions are formed at respective end portions of a pair of web portions, wherein a relationship among a geometrical moment of inertia I per 1 m of wall width (cm 4 /m) when forming a steel sheet pile wall, a weight per unit wall area W (kg/m 2 ), a penetration resistance R, and a web angle θ (°) is set to satisfy one of following expression groups (A) and (B), the expression group (A): ( W/I )× R≦ 0.004 and 2.65×10 −4 ×I+ 22≦θ≦2.80×10 −4 ×I+ 48(20,000≦ I< 80,000) 2.65×10 −4 ×I+ 22≦θ≦70(80,000≦ I <180,000) the expression group (B): 0.004<( W/I )× R≦ 0.0075 and 2.80×10 −4 ×I+ 44.6<θ≦80(20,000≦ I< 80,000) 67<θ≦80(80,000 ≦I< 200,000).