| 摘要 |
PROBLEM TO BE SOLVED: To provide an estimation method for a form of a drilled hole enabling a trustworthy estimation at a low cost and through a simple measurement operation on a ground, the drilled hole being formed by an ordinary auger instead of a special auger.SOLUTION: Penetration work, in which an auger is penetrated into a ground B from a position A on a ground surface, is divided into a plurality of parts according to a unit work amount, and a measurement is made on the following items each time the unit work amount for the penetration work is completed: a penetration amount L per unit work amount by the auger into the ground from the position on the ground surface; and an angle of inclination of the auger to a vertical line F from the position on the ground surface passing through a drilled hole H. A calculation is made for a plurality of times on a depth dl of the drilled hole and a deviation D of the auger in a horizontal direction from the drilled hole at the position on the ground surface, using the penetration amount and the angle of inclination obtained in the measurement work, the calculation being made each time the unit work amount is completed for a plurality of times. The plurality of calculated values of the depth and the deviation in the horizontal direction is integrated sequentially in an order of the calculation work, for estimating a form of the drilled hole.SELECTED DRAWING: Figure 5 |
