Surface drainage system
First Claim
1. A surface drainage structure formed above a subgrade, comprising:
- an elongate drain conduit disposed partially within the subgrade, the elongate drain conduit defining at least one drain slot extending through a wall thereof; and
a pavement layer with an exposed top surface, the pavement layer comprising;
a pair of opposed side surfaces extending from the exposed top surface; and
a channel surface spaced from the exposed top surface and extending only partially through the pavement layer and completely between the opposed side surfaces;
the pair of opposed side surfaces and the channel surface defining a stepped drainage channel extending from the top surface to define a depth, the drainage channel being in fluid communication with the drain slot of the elongate drain conduit, that portion of the drainage channel extending from the top surface defining a variable depth along the length of the drainage channel.
1 Assignment
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Accused Products
Abstract
A surface drainage structure formed above a subgrade may include an elongate drain conduit disposed partially within the subgrade. The elongate drain conduit may define at least one drain slot extending through a wall thereof. The structure may include a pavement layer with an exposed top surface and a drainage channel extending therefrom. The drainage channel may be in fluid communication with the drain slot of the elongate drain conduit. A method of forming the surface drainage structure includes placing the elongate drain conduit in the subgrade, forming the pavement layer, cutting an upper channel along the elongate drain conduit, and cutting a lower channel and the drain slot in the elongate conduit.
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Citations
20 Claims
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1. A surface drainage structure formed above a subgrade, comprising:
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an elongate drain conduit disposed partially within the subgrade, the elongate drain conduit defining at least one drain slot extending through a wall thereof; and a pavement layer with an exposed top surface, the pavement layer comprising; a pair of opposed side surfaces extending from the exposed top surface; and a channel surface spaced from the exposed top surface and extending only partially through the pavement layer and completely between the opposed side surfaces; the pair of opposed side surfaces and the channel surface defining a stepped drainage channel extending from the top surface to define a depth, the drainage channel being in fluid communication with the drain slot of the elongate drain conduit, that portion of the drainage channel extending from the top surface defining a variable depth along the length of the drainage channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of forming a surface drainage structure over a subgrade, the method comprising:
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forming a receiving trench in the subgrade; placing an elongate drain conduit in the receiving trench; forming a pavement layer on the subgrade and over the elongate drain conduit, the pavement layer having an exposed top surface; cutting an upper channel into the pavement layer along the axis of the elongate drain conduit, the upper channel having opposing side walls and a channel wall spaced from the exposed top surface and extending only partially through the pavement layer and completely between the opposing side walls, the upper channel having a first depth; and cutting a first lower channel and a first drain slot in the elongate conduit, the first lower channel extending from the channel wall to the elongate drain conduit. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification