Retaining walls example 3 16 design of a cantilever retaining wall bs 8 110 the cantilever retaining wall shown below is backþlled with granular material having a unit weight of 19 knm 3 and an internal angle of friction of 30.
Retaining wall design example with surcharge load.
Basement walls they are often buttressed by return walls and floor diaphragms which may make them too stiff for active soil pressures to develop requiring higher design loads and a different design approach.
Surcharge loads acting on retaining wall surcharge loads acting on retaining walls are additional vertical loads that used to the backfill soil above the top of the wall.
Forces on retaining walls 6.
Retaining wall to support a fill.
Retaining wall design bs 8002 1994 tedds calculation version 1 2 01 06 ultimate limit state load factors dead load factor f d 1 4 live load factor f l 1 6.
1 1 possible modes of failure.
Possible modes of failure for free standing concrete cantilever retaining walls are illustrated.
Wisdot regional staff determines the need for permanent retaining walls on highway projects.
Retaining wall development is described in section 11 55 5 of the.
It can be either dead loads for example sloping backfill above the wall height or live load which could result from the highway or parking lot paving or adjacent footing.
However this isnt the case if the retaining wall is.
Prior to completing any retaining wall design it is first necessary to calculate the forces acting on the wall.
Surcharge load on plan surcharge 10 0 kn m2 applied vertical dead load on wall wdead 85 6 kn m.
However this isnt the case if the retaining wall is.
Each of these walls must be designed to resist the external forces applied to the wall from earth pressure surcharge load water earthquake etc.
Building codes and retaining walls 5.
Design procedure overview 3.
Retaining walls generally have little vertical load other than self weight and weight of any soil on a footing.
Soil mechanics simplified 4.
Assuming that the allowable bearing pressure of the soil is 120 knm 2 the.
Retaining wall to support a cut.
Earthquake seismic design 7.
Soil bearing and stability 8.
14 1 1 1of this chapter.
Sketches of the retaining wall forces should be considered to properly distinguish the different forces acting on our retaining wall as tackled in the previous article retaining wall.
In figure 1 where a semi gravity wall is shown the live load surcharge is placed over any element of the ers for settlement and bearing analysis while the live load surcharge is placed behind all the elements of the ers for sliding and eccentricity analysis.
A wall number is assigned as per criteria discussed in.
Based on our example in figure a 1 we have the forces due to soil pressure due to water and surcharge load to consider.
