Full-scale instrumented testing of multiple airfield matting systems on soft soil to characterize permanent deformation

Garcia, Lyan I.

doi:10.1016/j.trgeo.2016.08.001

Cited by 9 publications

(7 citation statements)

References 7 publications

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“…For example, numerous studies have shown that most compaction occurs during the first few machine passes (Ampoorter et al., 2012; Han et al., 2006). The feasibility of using fiberglass mats (e.g., see Garcia & Howard, 2016) before the first pass could be investigated for the hybrid harvesting system used in the current study. It is also important to consider that harvesting occurred during a relatively dry summer compared with 30‐yr climate normal values (Table 2) and that the soils of the study area were excessively to moderately well drained.…”

Section: Discussionmentioning

confidence: 99%

Influence of mechanized timber harvesting on soil compaction in northern hardwood forests

Puhlick

Fernandez

2020

Soil Science Soc of Amer J

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Evaluating and refining methods to minimize soil compaction during timber harvesting is important for maintaining soil health and long-term forest productivity. This is especially important when harvesting methods change over time. In this study, a hybrid harvesting method was used with the trees cut by one machine, in-forest processing of trees by other machines, and transporting the wood to the roadside by a forwarder on silt loam soils during the summer months. Two methods for sampling soils with mixed horizons in logging trails were developed to determine the baseline values of soil bulk density for longterm monitoring and to compare soils from nonmixed B horizons with those of B horizons from nontrafficked areas. For both methods, paired soil samples, in and outside of logging trails, were collected to determine the difference in bulk density between trails and nontrafficked areas. Soil compaction in trails was greatest where the soils adjacent to trails had low bulk densities and for locations that were closest to landings. These results are important in the context of climate change, as more summer logging is expected to occur in areas traditionally cut in the winter because of longer frost-free periods and more winter precipitation occurring as rain. More logging during the expanding snow-free season could translate to a greater degree of compaction and longer soil recovery times over a larger portion of the forested landscape.

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Section: Discussionmentioning

confidence: 99%

Influence of mechanized timber harvesting on soil compaction in northern hardwood forests

Puhlick

Fernandez

2020

Soil Science Soc of Amer J

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“…A basis for this is provided by Garcia and Howard (2016), where the authors developed relationships for predicting subgrade deformation for different mat systems as a function of mat stiffness and F-15E passes. Rushing and Howard (2015) and Rushing and Howard (2017) performed similar work for the AM2 mat system for a range of CBRs.…”

Section: Permanent Deformation Analysismentioning

confidence: 99%

Evaluation of expedient surfaces for remote piloted aircraft

Garcia¹,

Rushing²,

Rutland³

2017

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The U.S. military began using remote piloted aircraft (RPAs) for reconnaissance and offensive operations in the mid-1990s. Their effectiveness has led to the development of several new airframes with increasing capability and operational requirements. RPA ground movements are ideally separated from manned aircraft traffic areas with their own parking aprons and hangar facilities. For expedient construction of RPA facilities, a matting system is desired to rapidly create parking aprons and hangar flooring. This report describes the evaluation of four commercially available airfield matting systems that were investigated to determine their capabilities for supporting RPAs and support vehicle operations. Each mat system was tested on a full-scale test section consisting of a subgrade with a California bearing ratio (CBR) of 6 surfaced with the airfield mats. Simulated MQ-9A Reaper and P-19 fire truck traffic was applied to the mat surface. Mat breakage and deformation were monitored and compared to performance requirements for compliance. Recommendations were provided for each mat system based on suitability and risk to aid in future procurement decisions.

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“…Combining the monitoring results with thermal and subsurface conditions, the characteristics and mechanisms of deformation in embankments along the QTR in permafrost regions were determined . Full‐scale monitoring tests of deformation and subgrade earth pressure on six airfield matting systems built with different materials and designs were conducted, and based on an analysis of the results, a formula was proposed to predict subgrade deformation according to aircraft loading and airfield mat properties …”

Section: Introductionmentioning

confidence: 99%

“…13 Full-scale monitoring tests of deformation and subgrade earth pressure on six airfield matting systems built with different materials and designs were conducted, and based on an analysis of the results, a formula was proposed to predict subgrade deformation according to aircraft loading and airfield mat properties. 14 Although considerable researches have been devoted to the monitoring of subgrade deformation in permafrost regions, rather less emphasis has been placed on seasonally frozen soil. Moreover, most existing studies that consider the effects of freezing and thawing on subgrade deformation have been conducted using soil samples or models, in which the boundary conditions adopted are of little practical application.…”

Section: Introductionmentioning

confidence: 99%

Fiber Bragg grating sensors for subgrade deformation monitoring in seasonally frozen regions

Meng

Sun

Wang

2019

Struct Control Health Monit

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Summary Excessive subgrade permanent deformation resulting from heavy vehicle traffic and freezing–thawing cycles is one of the primary causes of road damage in seasonally frozen regions. In this paper, an implanted cantilever sensing beam based on fiber Bragg gratings (FBGs) is proposed for subgrade deformation monitoring. Two optical fibers with inscribed FBGs were adhered to the opposite external sides of a PVC pipe which was selected as substrate. After laboratory calibration tests, the cantilever sensing beam was installed horizontally through the subgrade of a testing section. The beam will be bended driven by the deformation of the soils under the action of vehicles, and the deformation is recorded by the FBGs and calculated through principles of continuum mechanics. The subgrade deformation is considered to be the deflection of the sensing beam. The feasibility of the developed method was validated based on the results of field testing conducted for a three‐year period. It has been found that the combination of freezing–thawing cycles with heavy vehicle loading magnifies the extent of permanent subgrade deformation. The developed FBG‐based implanted cantilever sensing beams are thereby demonstrated to provide a feasible and effective approach for the in situ monitoring of subgrade deformation.

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Full-scale instrumented testing of multiple airfield matting systems on soft soil to characterize permanent deformation

Cited by 9 publications

References 7 publications

Influence of mechanized timber harvesting on soil compaction in northern hardwood forests

Influence of mechanized timber harvesting on soil compaction in northern hardwood forests

Evaluation of expedient surfaces for remote piloted aircraft

Fiber Bragg grating sensors for subgrade deformation monitoring in seasonally frozen regions

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