Water-permeable-retentive pavement structure and method of constructing the structure
AssigneeNihon Kensetsu Gijutsu Co., Ltd.
InventorYutaka Hara
Life of this patent
Estimating the term…
Abstract
A water-permeable-retentive pavement structure that includes: a water absorption column formed by filling foam glass in a hole, the foam glass having a continuous pore structure with a grain diameter of 1.0 mm to 2.0 mm, and the hole being formed through a roadbed to a depth below a groundwater level; a road subgrade formed on the roadbed, the road subgrade including the foam glass having a continuous pore structure with a grain diameter of 1.0 mm to 2.0 mm; and a water-permeable pavement formed on the road subgrade.
Claims7
A water-permeable-retentive pavement structure, comprising:
- a water absorption column comprising a hole filled with foam glass, the foam glass having a continuous pore structure with a grain diameter of 1.0 mm to 2.0 mm, the hole being formed through a roadbed to a depth below a groundwater level;
- a road subgrade formed on the roadbed, the road subgrade including foam glass having a continuous pore structure with a grain diameter of 1.0 mm to 2.0 mm;
- and
- a water-permeable pavement formed on the road subgrade;
- wherein the road subgrade includes:
- a lower layer made of foam glass having a continuous pore structure with a grain diameter of 1.0 mm to 2.0 mm;
- an intermediate layer, on the lower layer, made of foam glass having a continuous pore structure with a grain diameter of 5.0 mm to 10 mm;
- and an upper layer, on the intermediate layer, made of foam glass having a continuous pore structure with a grain diameter of 1.0 mm to 2.0 mm.
A method of constructing a water-permeable-retentive pavement, the method comprising:
- forming a hole through a roadbed to a depth below a groundwater level;
- forming a water absorption column by filling the hole with foam glass having a continuous pore structure with a grain diameter of 1.0 mm to 2.0 mm;
- forming a road subgrade on the roadbed with foam glass having a continuous pore structure with a grain diameter of 1.0 mm to 2.0 mm;
- and
- forming water-permeable pavement on the road subgrade;
- wherein the road subgrade is formed by:
- configuring a lower layer by scattering foam glass, laying the foam glass evenly, and subjecting the foam glass to rolling compaction, the foam glass having a continuous pore structure with a grain diameter of 1.0 mm to 2.0 mm;
- configuring an intermediate layer, on the lower layer, by scattering foam glass, laying the foam glass evenly, and subjecting the foam glass to rolling compaction, the foam glass having a continuous pore structure with a grain diameter of 10 mm to 50 mm;
- and configuring an upper layer, on the intermediate layer, by scattering foam glass, laying the foam glass evenly, and subjecting the foam glass to rolling compaction, the foam glass having a continuous pore structure with a grain diameter of 1.0 mm to 2.0 mm.
Dependencies are inferred from the claim text.