Retaining wall design 10 editionth a design guide for earth retaining structures contents at a glance.
Concrete retaining wall calculation example.
0 85 2 0 85 1 2 2 β ε ε β φ φ.
The base is divided into two parts the heel and toe.
Software such as mathcad or excel will be useful for design iterations.
Assuming that the allowable bearing pressure of the soil is 120 knm 2 the.
Bending strengthof the section has been reduced by about 15 shear strengthat wall base has been reduced by about 14.
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.
Port hills loess strength parameters.
The length of the foundation is 10mtr.
Development of structural design equations.
Two equations are developed in this section for determining the thickness reinforcement required to resist the bending moment in the retaining wall components stem toe and heel.
In this example the structural design of the three retaining wall components is performed by hand.
Strength reduced from 136 7 to 116 8 in kips.
The stem may have constant thickness along the length or may be tapered based on economic and construction criteria.
Design a reinforced concrete retaining wall for the following conditions.
Soil bearing and stability 8.
Three basic equations will be used to develop an equation for d.
The example wall is shown in figure x 2.
Foundation engineering chapter 8.
The retaining wall is constructed on the foundation known as the raft foundation.
F c 3000 psi fy 60 ksi.
Soil mechanics simplified 4.
Forces on retaining walls 6.
Concrete cantilever wall example.
1 2 example wall.
The wall is assumed to be located in the christchurch port hills.
The following design assumptions were made.
C 0 φ 30 degrees.
Earthquake seismic design 7.
1 1 0 003 0 003 0 003 0 003.
Two equations are developed in this section for determining the thickness reinforcement required to resist the bending moment in the retaining wall components stem toe and heel.
Reinforced concrete cantilever retaining wall analysis and design aci 318 14 reinforced concrete cantilever retaining walls consist of a relatively thin stem and a base slab.
3500 psi concrete 5 10.
In this example the structural design of the three retaining wall components is performed by hand.
Equation to calculate effective depth d.
Design and analysis of retaining walls 3 f crib walls or coffer dams are cells or units to be filled with soil or built up members of pieces of precast concrete or metal and are supported by anchor pieces embedded in the soil for.
Based on our example in figure a 1 we have the forces due to soil pressure due to water and surcharge load to consider.
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.
The example calculations are made here using mathcad.
Design procedure overview 3.
Building codes and retaining walls 5.
3 clear rather than the designed 2 clear.