Accession Number : AD0853865
Title : Evaluation of Equipment Used for Emplacement of Earth Anchors.
Descriptive Note : Final rept.,
Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS
Personal Author(s) : Gerard, Charles J.
Report Date : MAY 1969
Pagination or Media Count : 28
Abstract : This report describes an investigation conducted to evaluate the performance of various items of equipment used for the emplacement of earth anchors. The earth anchors, used to anchor the edges of landing-mat-surfaced runways, are 24 in. long with a 3/4-in. shank and a 4-in.-diam helical plate. Ten items of equipment, both gasoline and air powered, were tested by driving anchors into a compacted heavy clay (4 to 6 CBR), an undisturbed slit (10 CBR), and a sandy clay (18 CBR). From these tests it was concluded that a pneumatic wood-boring drill would be the most feasible air-powered item to be used for anchor emplacement. The most feasible gasoline-powered item tested was a posthole digger. The average pull required to remove the anchors after emplacement was 2040 lb. Since the pneumatic wood-boring drill is more readily available in the components system for an Army Engineer Combat Battalion and can also be used to remove earth anchors, it is recommended that this drill be employed by the combat engineer troops in the field for anchor emplacement. (Author)
Descriptors : *ANCHORS(STRUCTURAL)), (*LANDING MATS, (*DRILLS, PERFORMANCE(ENGINEERING)), INSTALLATION, RUNWAYS, CLAY, FEASIBILITY STUDIES, EARTH HANDLING EQUIPMENT.
Subject Categories : Terminal Flight Facilities
Machinery and Tools
Distribution Statement : APPROVED FOR PUBLIC RELEASE