Accession Number:

AD0876201

Title:

Evaluation of a Foxhole Cover.

Descriptive Note:

Final rept.,

Corporate Author:

ARMY MOBILITY EQUIPMENT RESEARCH AND DEVELOPMENT COMMAND FORT BELVOIR VA

Personal Author(s):

• Leland, E. P.

Report Date:

1970-11-06

Pagination or Media Count:

53.0

Abstract:

A 1.8-pound foxhole cover, fabricated from uncoated woven dacron, was exposed to peak blast overpressures varying from 4 to 15 p.s.i. at the 500-ton TNT test blast in Operation PRAIRIE FLAT. Test structures were standard two-man foxholes oriented end-on and side-on to ground zero and a covered trench oriented side-on to ground zero. Earth cover was 18 inches over each unit, and a two-foot long open entrance was provided. The covers survived satisfactorily at the 13 p.s.i. level, but one of the two at the 15 p.s.i. level sustained a 20-percent failure. The connected units installed over the trench sustained a joint failure when snap fasteners loosened. Design changes were indicated for method of anchoring and method of connecting units in multiple. Structures oriented side-on to ground zero showed greater deformation than those oriented end-on to ground zero. It was concluded that the foxhole cover is satisfactory for two-man foxholes at peak pressures of 13 p.s.i. from a 500-ton HE blast.

Descriptors:

• (*UNDERGROUND STRUCTURES
• PROTECTIVE COVERINGS)
• (*NUCLEAR EXPLOSIONS
• DAMAGE ASSESSMENT)
• SIMULATION
• TNT
• BLAST
• MEASUREMENT
• DACRON
• ANCHORS(STRUCTURAL)
• FAILURE(MECHANICS)
• TEST METHODS

Subject Categories:

• Structural Engineering and Building Technology
• Protective Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE