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|Title:||Landing mat over membrane-enveloped soil layers|
|Authors:||Burns, Cecil D.|
Regan, George L.
Membrane-enveloped soil layers
|Publisher:||Soils and Pavements Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||Miscellaneous Paper (U.S. Army Engineer Waterways Experiment Station) ; S-75-14|
Abstract: This study was conducted to evaluate the effectiveness of a membrane-encased soil layer (MESL) base course under medium-duty landing mat when subjected to C-141 aircraft loading. A special test section consisting of five test items was constructed and trafficked. Test item 1 was considered a control item and was designed to support about 1000 coverages of the C-141 aircraft loading. The design was based on current criteria for airfields surfaced with medium-duty mats. Items 2-5 were designed for MESL base courses of reduced thicknesses. The test included both XM18 and XM19 mats. The test section was subjected to traffic with one main gear of a C-141 aircraft assembly (twin-tandem assembly) loaded to 146,000 lb. The membranes used for encapsulation of the base soil failed after about 400 coverages of the test load. However, traffic was continued until complete failure of all test items. The analysis of data obtained in this investigation indicated the following: (A.) The performance of the control test item was in reasonable agreement with the existing thickness criteria. (B.) The use of a high-strength MESL base under mat resulted in a reduction in thickness of the strengthening layer required between the subgrade and mat, as determined by current criteria. The indicated thickness reduction for the C-141 aircraft loading on medium-duty mat is about 25 percent. (C.) The membranes used for encapsulation did not have sufficient strength to sustain the high deflections and deformation which developed under the C-141 aircraft loading for the full service life of the landing mat. NOTE: This file is large. Allow your browser several minutes to download the file.
|Gov't Doc #:||Miscellaneous Paper S-75-14|
|Rights:||Approved for public release; distribution is unlimited.|
|Appears in Collections:||Miscellaneous Paper|
Files in This Item:
|MP-S-75-14.pdf||30.28 MB||Adobe PDF|