ANALYSIS OF EFFECTS OF GROUT LAYER, INTERFACE SLIDING AND OVERCORING DIAMETER ON MEASURING RESULTS FOR INSTRUMENTED SOLID INCLUSION STRESSMETER

Abstract

The theoretical analyses of a triaxial elastic solid inclusion stressmeter are presented under the assumption of isotropic elastic medium with arbitrary elastic constants. The effects of grout layer thickness, interface sliding and overcoring diameter around a concentric pilot hole with the inclusion on estimations of ground initial or variable stresses are exactly expressed by closed-form solutions for the cases of three-dimensional stress systems. Numerical results for practical usage are shown by several refined graphical representations.