Abstract
A patent-pending StormPav green pavement is introduced here as a form of permeable road, in which the system employed precast concrete pieces as modular units. The pavement layer consists of hexagonal plates with each a service inlet to drain water. This study is exploring the water draining capability or technically surface permeation of these service inlets. Virtual and physical modelling are performed to investigate the service inlets as multiple orifices to permeate surface water of the said permeable road. Both modelling efforts have deduced that the permeable road has 18,000 – 24,000 mm/hr of permeation rate when subjected to a 5-minute red-alert storm (>60mm/hr of intensity). It implies that StormPav green pavement has superior surface permeation against the forming of water ponding and flash flood on roads.
Highlights
The idea of changing the conventional roads to permeable one had been initiated since 1960s
This paper introduces a new form of permeable road - a patent-pending Industrialized Building System (IBS) product named StormPav [1]
Computational Flow Dynamic (CFD) simulations show that the surface permeation increases when the flow passing through increases
Summary
The idea of changing the conventional roads to permeable one had been initiated since 1960s. This paper introduces a new form of permeable road - a patent-pending Industrialized Building System (IBS) product named StormPav [1] (see Figure 1). StormPav consists of three precast concrete pieces to form a single modular unit, namely a top cover, a cylinder and a bottom plate (see Figure 2). Designed Grade 50 concrete mix is used to cast these pieces that could withstand crushing load up to 100 kN/unit. It has been designed to have hollow cylinders as the middle layer that function as temporary stormwater storage; and even with the intentional cavity, a single modular unit is proven strong enough in the laboratory to withstand heavy vehicle on top of it [2,3].
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