| 摘要 |
PROBLEM TO BE SOLVED: To provide a simple and economical sampling method by which ground information nearly same with a non-disturbed sample, in a soft cohesive ground. SOLUTION: A double tube type standard penetration testing device is put into a cohesive ground to get a sampling soil and a density representing the in-situ ground and the density of the ground obtained from the hollow tubes density of soil taken in the first, the second or the third hollow tubes from the front end side of the double tube type standard penetration testing device is regarded as the density representing the in-situ ground, in this ground information measuring method of a cohesive soil.
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