2/28/2018 · From XMS Wiki. Jump to navigation Jump to search. “Embedment Depth” is the depth the entire culvert is embedded from the invert of the culvert barrel to the top of the embedding material. If an Embedment Depth greater than zero is entered, HY-8 will run the culvert analysis as if the input parameters were entered as a User Defined shape.
HY-8 determines the minimum depth within the barrel when it determines the water surface elevations through direct step. It then compares the minimum depth in the culvert, with the minimum depth in the cross section that is computed by the Manning’s Equation. If the depth is too shallow, the user can create a low flow channel in the embedment.
HY-8 automates the design methods described in HDS No. 5, Hydraulic Design of Highway Culverts, FHWA- NHI-12-029 and in HEC No.14, FHWA-NHI-06-086. Version 6.1 is.
HY-8 determines the minimum depth within the barrel when it determines the water surface elevations through direct step. It then compares the minimum depth in the culvert, with the minimum depth in the cross section that is computed by the Manning’s Equation. If the depth is too shallow, the user can create a low flow channel in the embedment.
• HY-8 Computes Inlet Control Headwater Elevation: Headwater elevation is entirely a function of inlet size, geometry and entrance condition Flow passes through critical depth at the culvert entrance and is supercritical in the barrel • HY-8 Computes Outlet Control Headwater Elevation:, HY8:Embedment Depth – XMS Wiki, HY8:Outlet Control Computations – XMS Wiki, HY8:Outlet Control Computations – XMS Wiki, 10/7/2016 · HY-8 flow types 2, 3, 4, 6, and 7 are all outlet control flow types and are shown in the figure below. … If the culvert is buried, this value is taken from the top of the embedment material. Inlet Depth = The depth computed at the entrance to the culvert using the direct step profile computation method Critical = The critical depth in the culvert, “ Embedment Depth ” is the depth the entire culvert is embedded from the invert of the culvert barrel to the top of the embedding material. If an Embedment Depth greater than zero is entered, HY-8 will run the culvert analysis as if the input parameters were entered as a User Defined shape.
The hydraulic relationships for embedded pipe culverts under inlet control in the National Cooperative Highway Research Program (NCHRP) Report 734 (Tullis, 2012), Federal Highway Administration’s (FHWA) Hydraulic Design Series 5 (Schall, Thompson, Zerges, Kilgore, & Morris, 2012), and FHWA’s HY-8 computer program (Versions 7.1 through 7.5 …
5/2/2012 · Do you have the latest version of HY-8? In 7.2, it’s called embedment depth . It’s measured in inches, and assumed to be constant, not more at the inlet than outlet like you mentioned. Maybe you could check for inlet control at 40%, and outlet control at 20%, and use the worst case.
Percent embedded is calculated with respect to the rise or diameter of the culvert at the centerline. many regional design guidelines have a minimum embedment depth criteria that is based on a percent of the culvert rise. For an 8 foot circular culvert that is embedded 2 feet, the % Embedded is 25%.
