CONSTRUCTION WORK FOR FOUNDATION STRUCTURE

摘要

PURPOSE:To make operation easier in narrow places by a method in which a high-pressure water jet tube is attached to a material to be penetrated having a vibrator on its upper part, and the material is penetrated into ground while jetting high-pressure water to the lower end and also giving vibration. CONSTITUTION:A guide hole 20 of a shape similar to the cross sectional form of a steel tube 1 to be penetrated is excavated, and the tube 1 is erected. In this case, four riser tubes 2 as high-pressure jet tubes are attached at equal intervals to the periphery of the tube 1 and a vibro-hammer 3 as a vibrator is attached to the upper part of the tube 1. High-pressure water is introduced through a water supply hose 6 into the tube 2 and the hammer 3 is actuated to give vibration to the tube 1, thereby penetrating the tube 1 into the ground. Foundation structure can thus be easily constructed without the needs to remove or move existing obstructions.