Design procedure overview 3.
Retaining wall problems and solutions pdf.
Building codes and retaining walls 5.
1 rigid wall 2 flexibale wall sheet pile walls are more flexible than the other types.
The appendices to nchrp report 611 are available online and include the following.
Three main types of retaining walls.
The safety factor against sliding minimum required f s.
Location of the point of application of the active earth pressure.
However full collapse of retaining wall is unlikely in addition to show signs of problems that could be observed and rehabilitate the wall before the wall fail entirely.
Design margin seismic loading of retaining walls.
Lateral pressure due to uniform surcharges.
Retaining wall according to s ystem rigidity can be classif ied as follow.
Retaining wall problems p1.
Wall with broken back.
Soil bearing and stability 8.
Backfill with broken surface.
Types of retaining walls tieback wall tieback is a horizontal wire or rod or a helical anchor use to reinforce retaining wall for stability one end of the tieback is secured to the wall while the other end is anchored to a stable structure i e.
Earth pressure exerted by.
Different types of retaining walls are used to retain soil in different places.
The safety factor against overturning b.
Semi gravity retaining wall reduce the dimensions of the gravity retaining wall by using some reinforcement.
Cantilever wood walls are the most common type of ned wall as seen at right.
1 5 do not consider the passive resistance of the fill in front of the wall.
Walls the ibc allows walls less than 4 ft high to be exempt from engineering requirements known as ned walls for non engineered design.
Forces on retaining walls 6.
Retaining wall sliding toppling overturning are types of total collapses that cannot be rehabilitated therefore rebuilding the wall the sole solution for these failures.
Volume 2 which is only available online presents the proposed specifications commentaries and example problems for the retaining walls slopes and embankments and buried structures.
Concrete deadman driven into the ground or anchored into the earth with sufficient resistance.
Retaining wall design 10 editionth a design guide for earth retaining structures contents at a glance.
Earthquake seismic design 7.
Soil mechanics simplified 4.
Line load parallel to the crest of the wall.
8 3 2 1 gravity retaining walls.
Gravity retaining wall depends on its weight for resisting lateral earth force because it have a large weigh 2.
Retaining wall design proceeds with the selection of tentative dimensions see fig 8 3 which are then analyzed for stability and structural requirements and revised as required.