Double-pipe circular drilling steel pipe pile and construction method thereof: Fid-Bau Portal

Double-pipe circular drilling steel pipe pile and construction method thereof

ZHANG JIHONG

The invention relates to a double-pipe circular drilling steel pipe pile and a construction method thereof in the field of civil engineering. The steel pipe pile comprises five parts of a steel pipe pile (1), an annular drill bit (3), a drill bit connector (4), a drill bit positioner (5) and a drill rod clamping groove (6), the drill bit positioner (5) is firmly connected with the steel pipe pile(1), the annular drill bit (3) is firmly connected with the drill bit connector (4), the drill bit connector (4) is clamped on the drill bit positioner (5) in a sleeving manner, and the drill bit connector (4) and the drill bit positioner (5) can rotate relatively. During construction, a cylindrical drill rod (7) is arranged on the inner side of the steel pipe pile (1) and connected with the annular drill bit (3), the annular drill bit (3) is driven by the cylindrical drill rod (7) to rotate, and an annular hole is drilled for pile sinking.

本发明涉及土木工程领域的一种双管环钻钢管桩及其施工方法，该种钢管桩包括钢管桩(1)、环形钻头(3)、钻头连接器(4)、钻头定位器(5)及钻杆卡槽(6)五部分，其中钻头定位器(4)与钢管桩(1)牢固连接，环形钻头(3)与钻头连接器(4)牢固连接，钻头连接器(4)卡套于钻头定位器(5)上，且钻头连接器(4)可与钻头定位器(5)相对回旋转动，在施工时，将筒状钻杆(7)置于钢管桩(1)的内侧且与环形钻头(3)连接，通过筒状钻杆(7)带动环形钻头(3)旋转，钻成环形孔沉桩。

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