| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an automatic penetration tester, capable of detecting the load torque of a penetration rod penetrating through a disk and evaluating the stratum of a ground to be tested according to the load torque. Ž<P>SOLUTION: This hammering penetration tester 1 comprises a torque sensor 30, capable of detecting the rotational load torque of a penetration rod 4 and a lifting unit 40 which imparts a predetermined load to the penetration rod 4. Thus, the sum of the penetration energy by the addition of rotation of the penetration rod 4 and the penetration energy by the load can be calculated. A diluvial, an alluvium, and a humic soil layer which are formed of clays with different moisture contents can be determined, by analyzing the sum of these energies. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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