| 摘要 |
PROBLEM TO BE SOLVED: To precisely evaluate the deformation property of ground at an original position under arbitrary stress. SOLUTION: A boring hole 2 is drilled in ground 1 being an object to be investigated, a hollow cylindrical test body 3 is cut out from the ground 1 of the hole bottom of the boring hole 2, outer pressure Pout and inner pressure Pin for the radial direction are applied on the outer peripheral face of the hollow cylindrical test body 3 and the inner peripheral face of a central small hole 5 by a pressurizing means 6 while load restraining deformation for the axial direction of the hollow cylindrical test body 3, and the radial deformation of the hollow cylindrical test body 3 is measured by a method in which pressure is not changed at the time when the outer pressure Pout and inner pressure Pin are changed respectively. Deformation property of the ground 1 is found from the relation of deformation and size of the outer pressure Pout and the inner pressure Pin. |
