APPARATUS FOR CUTTING A SLOT IN A FOUNDATION MASS FOR DETERMINING DEFORMABILITY AND RESIDUAL STRESSES IN THE FOUNDATION MASS

摘要

Apparatus for cutting a narrow slot in a foundation mass for measuring the deformability and the residual stress in the mass, the slot being formed by cutting a plurality of contiguous narrow slots with a rotatable cutting disc to a depth greater than the radius of the disc, whereafter a flat jack is inserted into the elongated slot and applies measured pressure against the faces bounding the slot whereby the faces undergo deformation which is measured by the jack.