| 摘要 |
PROBLEM TO BE SOLVED: To ensure transmission of a uniform stress between a pile and an upper frame structure without using a reinforcing rib by extending an upper surface of a pile from the whole circumference of outer diameter surface of head of the pile to a sideward direction over the outer diameter of the head of the pile by a specified length or more, and specifying the thickness of wall of abutting part of fitting part of the upper frame structure. SOLUTION: An extending amount of a pile 2 from the outer circumference of a head thereof is made 100 mm or more from an outer diameter D of an upper part of the pile 2, on the whole circumference. The plate thickness of a base 1 is set to have a minimum value H2 of not less than 75 mm, and the base 1 is fomed by machining a steel plate or made of cast steel. A part or the whole positioned in a circle with a smaller radius by 100 mm than a radius of an outer diamter surface of the pile 2 is opened with a thin wall or upward/downward. In this case, the base 1 is used as a connection member, and even if there is a horizontal eccentricity between the head of th pile 2 and the fitting steel pipe 3 the connection between the two 2, 3 are made possible without using a reinforcing member. Accordingly, on-site welding is reduced than a conventional method, thereby reducing the work period and cost, as well as reducing the amount of on-site welding resulting in improvement of quality in the connection part.
|
