Item: Instrumentation of avalanche loads, east riverside avalanche path, colorado
Title: Instrumentation of avalanche loads, east riverside avalanche path, colorado
Proceedings: 1986 International Snow Science Workshop, Lake Tahoe, California, USA
Authors: Arthur I. Mears, P.E.
Abstract: 32 strain gages and 6 load cells were installed in a reinforced concrete avalanche shed at the East Riverside path, San Juan Mountains, Colorado. The sensor locations were chosen to provide information about avalanche induced impact and depositional loads and strains at the ends and mid-points of the roof slab. Data are monitored continuously by a MEGADAC 2200 data acquisition system at O.Ol-second intervals throughout the avalanche season. This system has been programmed to permanently record on magnetic tape all strain and load data 30 seconds before and 120 seconds after impact whenever a threshold strain level (+ 75 x 10-6) has been exceeded. - Avalanche velocity and lateral extent will be observed and recorded on videotape from a high rock outcropping approximately 400m north of the shed. The avalanche loads and strains will be compared with those obtained from a static test in which a 3,500kg (4 ton) block was set down at 55 locations on the shed roof, thus calibrating the system to a known load magnitude and distribution.
Keywords: strain gages, load cells, strain level, velocity
Digital Abstract Not Available