PURPOSE: To excavate the least necessary working holes by excavating a little larger test hole than a specified dia. of a penetration bar with an excavating tool with a cylindrical saw and using a rolling compaction tool according to the size of this hole after the test.
CONSTITUTION: A cylindrical saw 6 is fitted via a base 5 equipped at the rod 4 of an excavating tool 1. In this case, the saw-tooth 6 is made to be a little larger hole than the dia of a penetration test bar. Next, a test hole H is bored by the excavating tool 1. And this paved and road bed materials excavated are taken out as a stuffed core. Next, the hole is filled back with the excavated material after completion of test and compacted by a rolling compactor 2 to recover the hole by charging the paving materials and compacting it again. In this case, the compacting face 9 of the compactor 2 is made to be a little smaller outer dia. than the saw-tooth. In this way, the working volume gets remarkably small and the driving tools may be a small one and hence, the penetration test can be remarkably rationalized.
MORITA SHOJI
KONDO TAKENORI
ISHIKAWA TSUTOMU
OKADA MINORU
SHIMA SHINOBU
MIURA KATSUNORI
