Abstract: Pressuremeter test has already become a practical, reliable method in geology project appraising, ground bearing capacity measuring through long time application, popularization, development and perfection. Its superiority had also been distinguished itself in the comparision between plate loading test, standard penetration test or other in-situ experiments. Aimed at the puzzles such as loosening, rigid, difficult in sampling and indoor phisico-mechanical testing in hard weathered granite, the high pressure pressuremeter tests are carried out; and some valuable results in engineering are obtained. Results indicate that there are some difference in the correlation of the test between clay and weathered granite because of the differential weathering in horizontal direction in weathered granite; but there also exist some linear relationships between the ground bearing capacity and the measuring point depth, deformation modulus and the bedding coefficient, ground bearing capacity, deformation modulus and bedding coefficient along with the number of standard penetration test. Fitting equations of linear fitting are provided.

Key words: pressuremeter test, hard weathered granite, ground bearing capacity, deformation modulus, linear relationship