What are culvert headwalls?

What are culvert headwalls?

Culvert headwalls are attached to the ends of a culvert to reduce erosion, inhibit seepage, retain the fill, improve the aesthetic and hydraulic characteristics, and make the ends structurally stable. Two basic types of headwalls are available. They are broadly classified as safety headwalls and non-safety headwalls.

What are Headwalls in construction?

Headwall or Endwall– An integrated wall located at either end of drainage pipe or a stream crossing structure. A wall built at a pipe inlet is a headwall. A wall built at a pipe outlet is an endwall.

What is a culvert in construction?

A culvert is a structure that channels water past an obstacle or to channel a subterranean waterway. Typically embedded so as to be surrounded by soil, a culvert may be made from a pipe, reinforced concrete or other material.

What are Headwalls used for?

Headwalls are a type of retaining wall that is commonly found near streams, ponds, or similar waterways. Headwalls are used to provide support for bridges and roadways by anchoring the piping to prevent movement due to hydraulic and soil pressures and prevent soil erosion and scouring from turbulent storm-water.

Why are Headwalls used?

Headwalls are a low cost solution to prevent the erosion of soil and drainage pipes. They prevent drainage water from damaging the road structure while also providing structural support. Headwalls direct the flow of water, reducing damaging turbulence and ensuring the efficiency of the pipe.

What is the main purpose of culvert?

Culverts function primarily as hydraulic conduits, conveying water from one side of a roadway or similar traffic embankment to the other; therefore, culverts serve the dual purposes of functioning as hydraulic structures as well as acting as traffic load bearing structures.

Why are culverts used?

A culvert may act as a bridge for traffic to pass on it. They are typically found in a natural flow of water and serves the purpose of a bridge or a current flow controller. Culvert is provided under roads and highways for a crossing of water, as road embankment cannot be allowed to obstruct the water flow.

What is culvert span?

Culverts are defined as any structure, whether of single-span or multiple-span. construction, with an interior width less than 20 feet when measured horizontally along. the centerline of the roadway from face-to-face (inside) of the extreme abutments or sidewalls.

What is a flared end section?

Pipe Flared End Sections provide a transition from the pipe or culvert to the environment upstream and downstream. They improve the flow capacity of the sewer or culvert and create an aesthetically pleasing appearance blends into the embankment. These sections are available from 12” dia. to 72” dia.

What is apron in culvert?

Apron: A hardened surface (usually concrete or grouted riprap) placed at either the invert of the culvert inlet or outlet to protect structure from scour and storm damage.