Strengthing Reinforced Concrete Retaining Wall

Reinforced concrete cantilever retaining walls consist of a relatively thin stem and a base slab. One is the check for an overturning moment and the other one is the check for sliding. In cantilever retaining walls the concrete base or footing holds the vertical masonry wall in position and resists overturning and sliding caused by lateral soil loading.

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C 150 pcf minimum yield strength of reinforcing steel f.

Strengthing reinforced concrete retaining wall.

Built in english bond the wall was supported on a mass concrete retaining wall. Rebar is a very sturdy metal that is used inside concrete of buildings sidewalks and other structures to increase its strength. To prevent the collapse of masonry walls during earthquake it is advisable to use reinforced brick masonry walls in new construction. Reinforced concrete rc jackets technique for strengthening of masonry structure consists of application of jackets on one or both sides of masonry walls.

This method is used for brick masonry as well as for stone masonry walls. For using reinforcement jackets first the plaster is removed from the walls. B short retaining walls vertical walls up to about 3m in height are usually built as shown in figure 1 b. Use rebar that is 12 inches taller than the wall is high.

There are two checks to consider the stability of the retaining wall. Refer to figure a 4 for the mass or weight calculations. The weight of the retaining wall including the gravity loads within it plays a vital role in performing the stability check. When you use rebar as a bracing material for brick retaining walls it will effectively block any earth that is cascading toward it.

Strength of reinforced concrete sections amount of rebar a s the project calls for 5 10 and 5 12 are used. Out of plane strengthening of partitions can be clubbed together with lateral strengthening of building by providing reinforced concrete jackets to the partitions. Material properties of reinforced concrete elements compressive strength of concrete at 28 days f. The stem may have constant thickness along the length or may be tapered based on economic and construction criteria.

Or the retained soil behind the reinforced soil and foundation soil below the reinforced soil of mse. The base is divided into two parts the heel and toe. Strength reduced from 136 7 to 114 9 in kips. These consists of a concrete or masonry wall of uniform thickness vertical wall reinforcing and transverse footing reinforcing are all designed for the lateral shear and cantilever bending movement plus the vertical weights of the wall footing and earth fills.

Mortar joints between bricks are cleaned. C 3 6 ksi 4 0 ksi for mse panels reinforced concrete unit weight γ. The addition of reinforcement to concrete masonry greatly increases the tensile strength and ductility of a wall providing higher load resistance. The heel is the part of the base under the backfill.

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. The brick wall was believed to be constructed from london stocks with a lime mortar and the strengthening scheme was therefore designed assuming a characteristic compressive strength of the masonry of 2 3n mm2.

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