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Evaluating Superheavy Load Movement on Flexible Pavements: Identifying Load Nucleus and Elements of Bearing Capacity Investigation
AuthorNimeri, Mohamed A.
AdvisorHajj, Elie Y.
Civil and Environmental Engineering
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Nowadays, industrial facilities are undergoing massive upgrades and innovations, which require moving Superheavy Loads (SHLs), these are loads with a gross vehicle weight (GVW) and axle weight exceeding the overweight legal limits and require special permits. The axle and tire configurations in SHL permits are variable and often assembled to suite the superheavy components being transported. Therefore, a realistic procedure is required to model SHL move on flexible pavement, considering that SHL axle and tire configurations are non-standard.The work presented in this research aimed to establish a new analysis procedure to model SHL using a representative Nucleus of axle and tire configurations. A clear procedure was proposed to identify SHL representative Nucleus, which when repeated across the SHL area, produces maximum stresses under SHL. Then, the Nucleus procedure was evaluated using a full factorial study, to assess its accuracy and sensitivity for the influence of pavement structure, different SHL cases and pavement analysis temperature.Applying the SHL Nucleus concept elements of bearing capacity were investigated. A second investigation was also conducted, comparing the SHL-induced state of stresses to that under standard truck loading.