Author: Lawrence D. Hokanson
Publisher:
ISBN:
Category : Military engineering
Languages : en
Pages : 282
Book Description
The requirement for field testing of the existing Bomb Damage Repair (BDR) procedures under realistic field conditions, the testing of new BDR materials developed for AFWL and requirements for advanced research on debris backfills and equipment package optimization led to the AFWL/Tyndall AFB BDR Field Test. Five major tests and two smaller tests were run. Shortcomings of the AFM 93-2 repair process were identified, including the requirements for more realistic training, improvement in project coordination, improved methods of handling upheaved pavement and a more carefully designed AM-2 ramp attachment system. An optimum equipment package was designed using inventory equipment centered about a large rubber tired dozer. The need for heavier equipment was generally indicated by the field tests. Testing of debris backfill showed that compaction below the six foot level is not important for expedient repairs. Testing of regulated-set cement and PVC structural backfill modules was accomplished with unfavorable results. In general, structural backfill systems cannot compete with debris for expedient repairs. It was determined that development of regulated-set cement is not advanced enough to allow its inclusion in the USAF BDR program at this time. Crater data from 750 lb bombs in clay and sand from 25 lb C-4 charges were collected, and these indicated that the detonation in clay produced the worst repair conditions, although upheaval in the sand subgrade detonations was larger in relation to the crater volume. (Author).
Tyndall AFB Bomb Damage Repair Field Test
Author: Lawrence D. Hokanson
Publisher:
ISBN:
Category : Military engineering
Languages : en
Pages : 282
Book Description
The requirement for field testing of the existing Bomb Damage Repair (BDR) procedures under realistic field conditions, the testing of new BDR materials developed for AFWL and requirements for advanced research on debris backfills and equipment package optimization led to the AFWL/Tyndall AFB BDR Field Test. Five major tests and two smaller tests were run. Shortcomings of the AFM 93-2 repair process were identified, including the requirements for more realistic training, improvement in project coordination, improved methods of handling upheaved pavement and a more carefully designed AM-2 ramp attachment system. An optimum equipment package was designed using inventory equipment centered about a large rubber tired dozer. The need for heavier equipment was generally indicated by the field tests. Testing of debris backfill showed that compaction below the six foot level is not important for expedient repairs. Testing of regulated-set cement and PVC structural backfill modules was accomplished with unfavorable results. In general, structural backfill systems cannot compete with debris for expedient repairs. It was determined that development of regulated-set cement is not advanced enough to allow its inclusion in the USAF BDR program at this time. Crater data from 750 lb bombs in clay and sand from 25 lb C-4 charges were collected, and these indicated that the detonation in clay produced the worst repair conditions, although upheaval in the sand subgrade detonations was larger in relation to the crater volume. (Author).
Publisher:
ISBN:
Category : Military engineering
Languages : en
Pages : 282
Book Description
The requirement for field testing of the existing Bomb Damage Repair (BDR) procedures under realistic field conditions, the testing of new BDR materials developed for AFWL and requirements for advanced research on debris backfills and equipment package optimization led to the AFWL/Tyndall AFB BDR Field Test. Five major tests and two smaller tests were run. Shortcomings of the AFM 93-2 repair process were identified, including the requirements for more realistic training, improvement in project coordination, improved methods of handling upheaved pavement and a more carefully designed AM-2 ramp attachment system. An optimum equipment package was designed using inventory equipment centered about a large rubber tired dozer. The need for heavier equipment was generally indicated by the field tests. Testing of debris backfill showed that compaction below the six foot level is not important for expedient repairs. Testing of regulated-set cement and PVC structural backfill modules was accomplished with unfavorable results. In general, structural backfill systems cannot compete with debris for expedient repairs. It was determined that development of regulated-set cement is not advanced enough to allow its inclusion in the USAF BDR program at this time. Crater data from 750 lb bombs in clay and sand from 25 lb C-4 charges were collected, and these indicated that the detonation in clay produced the worst repair conditions, although upheaval in the sand subgrade detonations was larger in relation to the crater volume. (Author).
A Concept for Rapid Repair of Bomb-damaged Runways Using Regulated-set Cement
Author: George C. Hoff
Publisher:
ISBN:
Category : Bombs
Languages : en
Pages : 168
Book Description
Publisher:
ISBN:
Category : Bombs
Languages : en
Pages : 168
Book Description
Interim Field Procedure for Bomb Damage Repair
Author: Michael T. McNerney
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 58
Book Description
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 58
Book Description
Bomb Damage Repair [BDR]
Evaluation of Substitute Input for NCEL Bomb Damage Repair Code
Author: Glenn T. Baird
Publisher:
ISBN:
Category : Blast effect
Languages : en
Pages : 64
Book Description
This research project was concerned with the evaluation of substitute input to a computer program which is used to analyze the performance of repaired bomb craters. The typical materials used in the rapid repair of bomb craters were tested in various states of stress to obtain soil strength and deformation parameters for use in the computer code. A concrete sand, two gravels, and a well-graded crushed limestone were tested in hydrostatic compression, constant mean normal stress, and triaxial compression for evaluation of their nonlinear bulk moduli, shear moduli, and moduli of elasticity. Laboratory testing was performed with a modified Hveem Stabilometer. Bulk and shear moduli were inputted to the axisymmetric, finite-element computer code and the nonlinear results were compared with the linear results. Triaxial compression confining pressures are suggested for the selected materials. With the linear moduli computed from the triaxial compression tests performed at these pressures, deflections equivalent to those computed with nonlinear moduli can be computed. The computer input was thereby reduced and laboratory testing was greatly simplified.
Publisher:
ISBN:
Category : Blast effect
Languages : en
Pages : 64
Book Description
This research project was concerned with the evaluation of substitute input to a computer program which is used to analyze the performance of repaired bomb craters. The typical materials used in the rapid repair of bomb craters were tested in various states of stress to obtain soil strength and deformation parameters for use in the computer code. A concrete sand, two gravels, and a well-graded crushed limestone were tested in hydrostatic compression, constant mean normal stress, and triaxial compression for evaluation of their nonlinear bulk moduli, shear moduli, and moduli of elasticity. Laboratory testing was performed with a modified Hveem Stabilometer. Bulk and shear moduli were inputted to the axisymmetric, finite-element computer code and the nonlinear results were compared with the linear results. Triaxial compression confining pressures are suggested for the selected materials. With the linear moduli computed from the triaxial compression tests performed at these pressures, deflections equivalent to those computed with nonlinear moduli can be computed. The computer input was thereby reduced and laboratory testing was greatly simplified.
Bomb Crater Repair Techniques for Permanent Airfields
Author: David L. Cooksey
Publisher:
ISBN:
Category : Air bases
Languages : en
Pages : 134
Book Description
Publisher:
ISBN:
Category : Air bases
Languages : en
Pages : 134
Book Description
Evaluation of Vibratory Rollers for Bomb Damage Repair
Author: Kenneth J. Knox
Publisher:
ISBN:
Category : Road rollers
Languages : en
Pages : 76
Book Description
Four vibratory rollers in the 8.5 to 17-ton range were evaluated for use in bomb damage repair of airfields. The rollers were tested for their compaction ability on grade crushed limestone. After this initial testing the two most promising rollers were tested by repairing simulated bomb craters using 24-inch thick layers of crushed limestone compacted only from the surface. These repairs were tested with F-4 loadcraft traffic. Despite difficulties in predicting roller performance, 10-ton vibratory rollers or heavier are capable of compacting crushed limestone from the surface only to support F-4 loads. (Author).
Publisher:
ISBN:
Category : Road rollers
Languages : en
Pages : 76
Book Description
Four vibratory rollers in the 8.5 to 17-ton range were evaluated for use in bomb damage repair of airfields. The rollers were tested for their compaction ability on grade crushed limestone. After this initial testing the two most promising rollers were tested by repairing simulated bomb craters using 24-inch thick layers of crushed limestone compacted only from the surface. These repairs were tested with F-4 loadcraft traffic. Despite difficulties in predicting roller performance, 10-ton vibratory rollers or heavier are capable of compacting crushed limestone from the surface only to support F-4 loads. (Author).
Rapid Damage Assessment
Author: Christopher W. Wilson
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 128
Book Description
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 128
Book Description
Technical activities, Civil Engineering Laboratory
Author: Naval Construction Battalion Center (Port Hueneme, Calif.). Civil Engineering Laboratory
Publisher:
ISBN:
Category :
Languages : en
Pages : 76
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 76
Book Description