| 摘要 |
PURPOSE: A pile construction method is provided to discharge sand smoothly by reducing the frictional resistance of sand remarkably put in the inside of a casing. CONSTITUTION: In a sand compaction equipment, a hopper(3) is installed on the upper part of a casing(2), and sand is supplied through the casing. A vibro pile hammer(4) is installed on the upper part of the casing. Air supply line(5) is installed on the upper end of the casing, and air is supplied by an air compressor in case of supplying sand into the casing. An air pressure is higher than the earth pressure of ground. Moreover, a water supply line(6) is installed on the upper end of the casing, and air and water are supplied at the same time. The proportion of sand to water is 1:0.5¯1 ratio. Therefore, a pile construction is operated in a liquid state.
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