| 摘要 |
PROBLEM TO BE SOLVED: To provide a device for forming a sand pile capable of smoothly chuting sand into a hollow tube, always detecting a sand top level position, and providing a high working efficiency without being affected by fog when air in the hollow tube is suddenly discharged. SOLUTION: This device 10 for forming the sand pile comprises the hollow tube 1, a material feed device 2 formed by installing a material inlet pipe 2b for feeding pile material into the hollow tube 1 on the side peripheral surface of the hollow tube 1, and a penetrating machine 3 for penetrating and extracting the hollow tube 1 into and from a ground. An open/close valve 4 is installed in the material inlet pipe 2b, an antenna unit part 5a transmitting high frequency scanning signals into the hollow tube 1 located at a position higher than the material inlet pipe connection part 41 of the hollow tube 1 and detecting reflective wave is installed so that the sand top level in the hollow tube 1 can always be detected.
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