Worked example to accompany mbie guidance on the seismic design of retaining structures for residential sites in greater christchurch version 2 november 2014.
Gravity retaining wall design example pdf.
Gravity retaining walls are earth retaining structures that depend primarily on their own self weight and that of any enclosed material to support the retained ground and any structures or loads placed upon it.
8 3 2 1 gravity retaining walls gravity wall dimensions may be taken as shown in fig 8 3 a.
Construction topics and caveats 24.
6 foot 1 8 m high gravity retaining wall equivalent fluid pressure of soil 40 pcf 7 1 kn m soil weight 100 pcf 15 7 kn.
Cantilever concrete retaining walls are commonly used for residential purposes often as integral basement walls.
Design example cantilever retaining wall.
Pilaster masonry walls 19.
Design and detailing of retaining walls.
Gravity wall design considerations all retaining walls need to be designed to withstand various imposing forces.
Wood retaining walls 14.
The base and other dimensions should be such that the resultant falls within the middle one third of the base.
Semi gravity retaining wall reduce the dimensions of the gravity retaining wall by using some reinforcement.
Structural design of cantilever retaining wall is depend on separating each.
However retaining wallscanalsobeconstructed for aesthetic landscaping purposes.
Swimming pool walls 18.
Cantilever retaining wall reinforced concrete wall with small dimensions and it is the most economical type and the most common note.
Naturally the biggest concern is the force imposed by the retained soil.
Types of retaining walls gravity wall depends entirely on its own weight to provide necessary stability usually constructed of plain concrete or stone masonry plain concrete gravity wall height 3 m in designing this wall must keep the thrust line within the middle third of the base width no tensile stress to be developed.
3 gravity retaining wall gl1 gl2 retaining walls are usually built to hold back soil mass.
14 1 1 wall development process.
Gravity walls generally are trapezoidal in shape but also may be built with broken backs.
Sheet pile walls 21.
How retaining walls fail.
Flexural and shear stresses in gravity retaining walls will almost always be of minor importance.
Retaining walls such as mse walls with precast concrete panel facing that are susceptible to damage from vehicular impact shall be protected by a roadway barrier.
Walls formed from interlocking concrete blocks are designed as gravity walls defined in bs 8002 2015 as follows.
The top width of the stem should be not less.
This is a cross section of a gravity wall composed of srw facing units and drainage aggregate.
Soldier pile walls 22.
Restrained non yielding walls 20.
Flexural and shear stresses are checked in the second design example and it is seen that the magnitudes are very low.
