INSIDE CUTTING MACHINE FOR STEEL PIPE PILE, EXCAVATION FOR STEEL PIPE PILE USED FOR INSIDE CUTTING MACHINE AND HOLLOW EXCAVATION PILING FOOT PROTECTION METHOD BY MEANS THEREOF

摘要

PURPOSE: To firmly bind the inside of a steel pipe pile with foot protection concrete by having a bearing member capable of rising and falling up and down and capable of rotating itself and openable cutting bladed stirring wings provided to the front end of the bearing member. ;CONSTITUTION: By a hollow excavation piling method, a steel pipe pile 13 is buried up to a specific bearing subsoil. A double pipe rod 1 is inserted in a hollow section of the steel pipe pile 13. By making sure that the front end of the double pipe rod 1 reaches the front end of the steel pipe pile 13, an internal pipe 7 is raised. Cutting bladed stirring wings 4 are widened slightly larger than the inside diameter of the steel pipe pile 13, and a spiral thread groove 14 is made to the inside of the steel pipe pile 13 by rotating an external pipe 6. At the same time, cement milk is poured. Chips produced by groove cutting are mixed with cement milk with the cutting bladed stirring wings 4. Steel chips are mixed with the cement milk, and a groove 1 is made in the adhesive surface, so that adhesive force can be increased.;COPYRIGHT: (C)1995,JPO