PERMEABLE INTERLOCKING CONCRETE PAVEMENT FOR STORMWATER MANAGEMENT: STRUCTURAL PERFORMANCE UNDER HEAVY LOADING

摘要

Although permeable pavements are becoming increasingly common for stormwaterrnmanagement across the world, they are mostly used in parking lots, basic access streets,rnrecreation areas, and landscaped areas, all of which carry very light, slow moving traffic. Onlyrnvery limited research has been undertaken on the mechanistic design and long-termrnperformance monitoring of permeable pavements carrying higher traffic volumes and heavierrnloads, and the work that has been done has focused primarily on permeable pavements withrnopen-graded asphalt or portland cement concrete surfacing. Very little research has beenrnundertaken on the use of permeable interlocking concrete paving unit layers as a surfacing forrnmore heavily trafficked pavements.rnTo understand how permeable interlocking concrete pavements (PICP) perform underrnheavy traffic loading, a research project was conducted at the University of CaliforniarnPavement Research Center (UCPRC) with funding from the concrete paver industry. Thernresults of this project were used to develop a Mechanistic-Empirical (M-E) design method forrnPICP. This method is based on mechanistic analysis and was partially validated withrnaccelerated pavement testing (APT) results. This paper presents a summary of the structuralrnperformance of PICP under heavy traffic loading with a Heavy Vehicle Simulator (HVS). Thernresults include the rutting performance of PICP sections with three different thicknesses ofrnsubbase layer (reservoir layer) under dry, wet and drained conditions and with different loadrnlevels. The rut development with loading repetitions in the surface, base and subgrade layersrnis discussed.