Design of cantilever t-type retaining wall v/s cantilever semi-gravity retaining wall

[DK1614]

I wanted to understand if there was any specific differences between the design of these 2 types of walls.

Are the differences limited to less reinforcement needed on the semi-gravity wall due to the larger size of the wall stem AND this larger stem size providing more weight/stability to the wall?

Are the vertical and lateral forces being applied to the wall, and the stresses on the wall similarly calculated?

 

[r13]

I don't know what is a semi-rigid gravity wall, but seems the traditional gravity wall is rarely used except in dam construction. In these days, the cantilever retaining wall probably is the top choice for walls with modest height. Counterfort wall is usually used for walls with higher backside pressure. The pressures are applied the same way, but with the stem and slab taking the load in one way cantilever action for the former, and for the latter, the stem takes the majority of the load in one way action, and the wall and the slab between stems designed as two way plates. Overall, the amount of reinforcing could be a wash for both type of walls, but you can see the counterfort wall cost more to build due to laboring.

 

[HTURKAK]

Semi gravity retaining wall is a type of gravity retaining wall which , a small amount of steel reinforcement is used near the back face in order to reduce the size of wall section.

Both of your assumptions in your questions are true..

I found this picture at web to see the definitions of gravity, semi gravity , cantilever and counterfort retaining walls :

 

[bridgebuster]

I would agree that it's rare to see a cast in place gravity wall these days. However, we're involved in a design-build proposal that includes a railroad bridge. The RR is requiring gravity abutments. Lately on highway projects block walls are becoming very popular. They usually go up faster than traditional cantilever walls.

 

[emmgjld]

Railroads do not like movement.The older gravity walls usually gave better results, from their standpoint.