Bridge Wing wall

[Aryal]

How we define the orientation of wing wall for abutment of skewed bridge?

 

[r13]

With reference to the axis of a reference point, to which the screwskew angle of the bridge was determined. I suggest to check AASHTO highway geometry design manual for the proper answer.

 

[STrctPono]

This is dependent on several factors.

Are there specific hydraulic requirements that need to be satisfied? Proper orientation of the wingwalls can compliment intended hydraulic function of the waterway and a bad oreinetation can inhibit it and/or exacerbate scour issues.

For bridges that are not oriented alongside streams... then typically, wingwalls can be oriented either parallel, perpendicular, or some acute angle with reference to the abutment face. These typically might be governed by getting the wingwalls to "chase the grade" so it can provide soil retention on the backside.

So much goes into the decision for how a wing wall should be oriented. You really need to look at the overall picture of the surrounding roadways and the existing grades.

 

[JoelTXCive]

Every bridge is different, but from a CAD Plan & Profile point of view, I would suggest the following.

1) The roadway should have a PGL with a bearing, and the station of the abutment should be known from the roadway engineers.

2) The skew angle of the abutment should be referenced to the PGL.

3) You can then reference the wingwall angles to the face of the abutment.