ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
The study was conducted to investigate various field techniques to be used to identify the seismic response of the MAID-MILES system at a site. This report also presents a description of the steps needed to perform a preinstallation seismic survey for the MAID-MILES system. The general purpose of this survey is to determine the suitability of an installation for the deployment of the MAID-MILES system. This survey is designed to be used by the engineering personnel available at Department of Energy DOE installations. Two transducer systems were investigated and field tested in this study. The first system consisted of a short length of MILES cable 10 m having electrical connections equivalent to the standard length cable. The second system consisted of four surface-emplaced geophones connected in a series-subtracting array and adjusted by a series-variable resistor. Field tests showed that the short cable system has essentially the same response as the standard length cable and the geophone array system provides a reasonable simulation of MILES cable response to both intruders and background noise sources. A guide for the conduct of a preinstallation seismic survey for the MAID-MILES system is presented. In this survey, initial information would be obtained from a mapping study and field reconnaissance and final indications of problem areas would be obtained by a MAID-MILES performance survey using a MAID-geophone array and a MAID-short cable system.