| 摘要 |
PURPOSE: A micro-pile is provided to meet safety standard and reduce a manufacturing cost. CONSTITUTION: A micro-pile comprises steel bars(2), a coupling unit(4), and a fastening unit(6). The steel bar is formed as a bar to form a frame. The coupling unit connects steel bars. The fastening unit coupled the steel bars to a structure(8). The steel bar comprises carbon(C) of 47~52 parts by weight, silicon(Si) of 15~35 parts by weight, manganese(Mn) of 110~140 parts by weight, phosphorus(P) of 0~30 parts by weight, sulfur(S) of 0~30 parts by weight, copper(Cu) of 0~20 parts by weight, nickel(Ni) of 0~20 parts by weight, chrome of 0~25 parts by weight (Cr), vanadium(V) of 10~14 parts by weight, and molybdenum(Mo) of 0~6 parts by weight. |
