Instrumentation for the NEESR Sand Aging Field Experiment

摘要: This paper describes the instrumentation being developed and/or used for monitoring post-liquefaction time-dependent changes in state and properties of sand. As part NEESR project "NEESR - II: Mechanisms Implications Time-Dependent Changes State Properties Recently Liquefied Sands," a field study is performed which involves inducement liquefaction saturated sand deposit via explosives, vibroflot, NEES vibroseis. Subsequent to liquefaction, changes, commonly referred as "aging," liquefied will be monitored months years. Central measurement accelerations, settlements, pore water pressures during subsequent liquefaction. Monitoring these parameters allow authors compare various methods breakdown soil structure with magnitude disturbance aging.