Concrete Basement Wall Design Example

The walls are designed using parameters relevant to the london clay.

Concrete basement wall design example.

No doubt there are many concrete basement walls without reinforcement. A sideways force against a basement wall puts one face of the wall in tension see figure 1 next page and concrete s tensile strength is much lower than its compressive strength. This session is not intended to teach concrete design but more of an awareness of why things are the way they are american concrete institute building code requirements for. 305 mm thick concrete masonry foundation wall 12 ft 3 66 m high.

Building strong walls a concrete wall s strength depends. The retaining wall is fixed to the reinforced concrete slab foundation with a shear key for sliding resistance. Reinforced concrete wall design basics mike o shea p e. Concrete foundation walls regardless of the type of concrete foundation wall selected the designer needs to determine the nominal and factored loads that in turn govern the type of wall reinforced or unreinforced that may be appropriate for a given application.

Aci e702 example problems buried concrete basement wall page 5 of 9 calculations references flexure and axial design vertical reinforcement at base of wall using section 14 4 design method walls designed as compression members based on preliminary investigation try 6 bars at an 8 inch spacing 6 8. By a basement wall i mean a wall with living space on one side and outside soil or other backfill on the other and a superstructure overhead. I ve seen many basement wall failures in masonry block foundations equipped with interior rather than exterior footing drain systems. Wall design should use the soil pres sure of the next higher class.

This design example focuses on the analysis and design of a tapered cantilever retaining wall including a comparison with model results from the engineering software programs spwall and spmats. That is 45 pcf ft in a sand soil 60 pcf ft in a silt soil and so on. Step by step calculations for the design of a basement retaining wall example from scratch using asdip retain structural engineering software. Even though no water table was found the walls will be designed for a water table 2 00m above.

And it is made of concrete reinforced concrete. 9 bars at 72 in. Structural design principles basement walls basement walls are designed as propped cantilevers in reinforced concrete the basement slab acting as the prop at base level. Equivalent fluid pressure is 45 psf ft 7 0 kn m m excluding soil load factors 10 ft 3 05 m backfill height.

The following sections detail design methods for both wall types.