Method for producing in-situ concreted piles with enlarged bases

摘要

A method and apparatus for producing in-situ concrete piles with enlarged bases. The method includes the steps of: driving into the ground a tube provided at its lower end with a shoe which is larger than the diameter of the tube, and with an outer casing attached around its lower portion; filling fresh concrete into the gap between the tube and the soil as fast as the opening in the soil is formed; expelling the shoe and a plug of concrete to form the enlarged base; and extracting the tube together with the outer casing.