Vibration impact type light ground survey machine and vibration impact type ground survey method

摘要

PROBLEM TO BE SOLVED: To provide an oscillatory impact-type light-weight ground investigation machine and an oscillatory impact-type ground investigation method, the oscillatory impact-type light-weight ground investigation machine being capable of investigating hardness equivalent to a bearing ground of a foundation of a transmission line tower and the like, and light enough to be carried on a person's shoulder.SOLUTION: An oscillatory impact-type light-weight ground investigation machine 10 includes: a penetration rod 12 formed in a straight rod form or a straight cylindrical form; a tip cone 14 fitted on a tip of the penetration rod 12 and penetrated into an investigated ground; a knocking head 16 fitted on a head part of the penetration rod 12; a mechanical power generating part 24 generating mechanical power; an oscillatory impact part 26 fitted on the knocking head 16 and making an oscillatory impact from above at constant thrust and at a constant vibration number; and a power transmission part 28 conveying the power generated by the mechanical power generating part to the oscillatory impact part 26; as well as a portable oscillatory impacting device 18; and an automatic penetration speed recording device (a wire encoder 20, a data logger 22) for measuring and recording penetration speed of the penetration rod 12.SELECTED DRAWING: Figure 1