GROUND ENVIRONMENT SURVEY METHOD AND EQUIPMENT THEREFOR

PROBLEM TO BE SOLVED: To perform an accurate ground environment survey, simplify a work process and reduce survey cost by preventing collapse of a bore hole for survey without using slurry in the ground environment survey method and equipment therefor. SOLUTION: This is a ground environment survey method performing the survey inserting a testing device 2 to a survey hole 1. Then, it comprises a process of pressing an inner rod 4 placed in an outer casing 3 into ground while rotating both the casing and the rod thereby drilling a survey bore hole and supporting the survey bore hole by the outer casing, an inner road pulling up process by pulling up the inner road only higher than the length of the testing device from the bottom of the survey bore hole, a testing device coupling process in which the testing device is lowered in the inner rod and the testing device is attached to the inner rod detachably so as to expose the testing device from the inner rod tip portion by means of a testing device coupling mechanism 2b, and a penetration process performing the ground environment survey by penetrating the testing device into the bottom of bore hole by applying a force toward the tip of the inner rod.