Concrete Retaining Wall Reinforcement Design

Building codes and retaining walls 5.

Concrete retaining wall reinforcement design.

Built on a reinforced concrete footing. Calculate ground bearing pressures. Strength reduced from 136 7 to 114 9 in kips. Soil bearing and stability 8.

These walls cantilever loads like a beam to a large structural footing converting horizontal pressures from behind the wall to vertical pressures on the ground below. Reinforced concrete wall is designed as a compression member. Retaining wall can be built with masonry along with reinforced concrete. 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.

Based on our example in figure a 1 we have the forces due to soil pressure due to water and surcharge load to consider. In instance of masonry retaining wall the thickness of wall enhances with height for the reason that masonry opposes the lateral pressure by its mass. 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. Forces on retaining walls 6.

Two equations are developed in this section for determining the thickness reinforcement required. Soil mechanics simplified 4. The stem may have constant thickness along the length or may be tapered based on economic and construction criteria. Retaining wall design 10 editionth a design guide for earth retaining structures contents at a glance.

In 1990 the concrete masonry association of australia cmaa published masonry walling guide no 4. Design procedure overview 3. Reinforced concrete wall is used in case where beam is not provided and load from the slab is heavy or when the masonry wall thickness is restricted. The base is divided into two parts the heel and toe.

Earthquake seismic design 7. As a result it is also known as gravity retaining wall. Design a reinforced concrete retaining wall for the following conditions. In this example the structural design of the three retaining wall components is performed by hand.

Coefþcient of friction is 0 4 and the unit weight of reinforced concrete is 24 knm 3 1. Design the wall and base reinforcement assuming fcu 35 knm 2 f y 500 knm 2 and the cover to reinforcement in the wall and base are respectively 35. Design for earth loads retaining walls which set out a design methodology and safe load tables for these structures. 2 5 clear to strength steel 5 12 rather than the designed 5 10 bending strength of the section has been reduced by about 16.

Determine the factors of safety against sliding and overturning. Plain concrete wall when reinforcement 0 4 reinforced concrete wall when reinforcement gt. N ultimate load design with material factors based on characteristic soil. Strength of reinforced concrete sections amount of rebar a s the project calls for 5 10 and 5 12 are used.