Evaluation of the Self-Boring Pressuremeter in Sand.
Interim rept. no. 3, Jun 85-Feb 86,
CENTRO DI RICERCA IDRAULICA E STRUTTURALE MILAN (ITALY)
Pagination or Media Count:
During the period covered by this report the writers performed the following work 1 No. 20 SBPTs in dry Ticino TS and Hokksund HS sands. A summary of the results of these tests is given in Table 1. These tests were performed using the so called ideal installation meaning that the SBP probe was installed in the calibration chamber before the specimen was formed by pluviation. These tests complete the programme of tests in dry sand using ideal installation 2 Starting from test No. 225, the Camkometer probe with the modified strain arms was used with the aim of detecting more reliably the lift-off pressure P sub o that under ideal conditions should correspond to the horizontal stress sigma prime sub h applied at the external boundary of the CC specimen. The modifications of the strain arms consisted in 1 substitution of the original arms made of brass with new re-designed arms of steel, having a larger rigidity 2 attempting to reduce the mechanical clearance seated in the original pivot-bush system by the insertion of a miniature roller bearing instead of the original bushing 3 improving the planarity and reciprocal alignement of the pivot and arms seating.
- Soil Mechanics