Retaining wall design example pdf

Norfolk and tasman retaining walls au keystone retaining wall systems. Earthquake load the force exerted on the structure by earthquake action, acting on either or both the face of the retaining wall and any other structure supported by the retaining wall. The wall may be restrained from moving, for example. The load that presents the greatest problem and its primary concern is the lateral earth pressure induced by the retained soil. Cantilever retaining wall reinforced concrete wall with small dimensions and it is the most economical type and the most common note. The ab stones provide a nominal setback of twelve degrees from vertical. Where the backfill is greater than 12 ft in height, such proposed walls shall be designed per a geotechnical investigation and report prepared by a licensed geotechnical engineer and shall. Analysis and design of a retaining wall download project. Assuming that the allowable bearing pressure of the soil is 120 knm. This session is not intended to teach concrete design, but more of an awareness of why things are the way they are. Assuming that the allowable bearing pressure of the soil is 120 knm 2, the. Final duevel arema retaining wall design for the railroad. Cantilever concrete retaining walls are commonly used for residential purposes, often as integral basement walls.

This design example focuses on the analysis and design of a tapered cantilever retaining wall including a comparison with model results. Reinforced concrete cantilever retaining wall analysis and. Abarac current retaining wall design procedures are summarized with emphasis on the prediction of lateral earth pressures using the coulomb and rankine earth pressure theories, and the equivalent fluid pressure method. Cantilever retaining walls can be precast in a factory or formed on site and considered economical up to about 25 ft in height. In such a case counterforts having trapezoidal section fixed at the base slab are provided at intervals of 1. Mechanically stabilized earth mse retaining walls are growing in popularity. Retaining counterfort wall design free download as pdf file. They are built from solid concrete or rock rubble mortared together. Apr 4, 2018 concrete retaining wall design tables whether youre making a bathroom that is new or remodeling the existing one, a wall design that is great should stay safe and healthy. This example is intended to be readily calculated by hand although a lot of structural spreadsheets and software such as prokon are available. In general, they are used to hold back or support soil banks and water or to maintain difference in the elevation of the ground surface on each of wall sides. Design and detailing of counterfort retaining wall when the height of the retaining wall exceeds about 6 m, the thickness of the stem and heel slab works out to be sufficiently large and the design becomes uneconomical. After this present you will be able to do the completecomplete design design andand detailingdetailing ofof differentdifferent typestypes ofof. Gravity walls are the earliest known retaining structures.

Concrete retaining wall design tables retaining wall design. The objective of this guideline is to provide information on retaining wall design in accordance with the city of nanaimo the city and the british columbia building code bcbc requirements. Variations on the basic design, including curves, tiers, railings, stairs, walkways and the like are making them more and more attractive to designers and architects. Geotechnical investigation and analysis performed by the geotechnical section 3. However, retaining walls can also be constructed for aesthetic landscaping purposes. The compaction plant can be represented approximately by a surcharge load equal to the weight of the roller. Types of retaining walls tieback wall tieback is a horizontal wire or rod, or a helical anchor use to reinforce retaining wall for stability one end of the tieback is secured to the wall, while the other end is anchored to a stable structure i. Cantilever retaining wall ouestion for the retaining wall and the profile shown below, calculate. The cantilever retaining wall shown below is backfilled with granular material having a unit weight.

The following text provides a general discussion and design guidelines for these flexible wall. D ata sheet concrete retaining walls concrete retaining walls provide a durable solution that is required of a structure in contact. Common design issues are described in the following sections. However, retaining wallscanalsobeconstructed for aesthetic landscaping purposes. Proportioning first, approximate dimensions are chosen for the retaining wall. The following worked examples have been prepared to illustrate the application of bs8002 to retaining wall design. Preface standards australia has published as 46782002 for the design of earth retaining structures, which. Ce 437537, spring 2011 retaining wall design example 1 8 design a reinforced concrete retaining wall for the following conditions. Sep 20, 2016 analysis and design of a retaining wall chapter one introduction retaining walls cantilever rw rankin theory forces on cantilever rw counterfort rw forces on counterfort rw the gravity rw forces on gravity rw chapter two stability of retaining wall soil properties of rws drainage in rw allowable bearing capacity chapter three procedure for the continue reading analysis and design of a. Please practice handwashing and social distancing, and check out our resources for adapting to these times.

Mar 04, 2019 to further understand the designed approach, here is a worked example of the design of the retaining wall. Wisdot bridge manual chapter 14 retaining walls january 2019 147 14. Then, stability of wall is checked for these dimensions. Section is changed if its undesirable from the stability or economy point of view. Basics of retaining wall design page x preface to the tenth edition this tenth edition, like its predecessors, become necessary because building codes change seismic design requirements for example and as we receive suggestions for topics to be added or expanded. Compaction of backfill behind a retaining wall is normally affected by the compactors. The safety factor against sliding minimum required f.

They are not full detailed calculations such as might be prepared for a real wall design but are limited to the calculation of earth pressure and bearing capacity, showing how the recommendations of bs8002 are applied in practice. Structural design of cantilever retaining wall is depend on separating each part of wall and design it as a cantilever, so its called cantilever r. Retaining wall designrev bogor agricultural university. 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. Design of retaining wall with counterfort engineering. Reinforced concrete wall design basics mike oshea, p. Example 8 cantilever wingwall design loads 6 21 design section b summary the abutment width along the skew, a 3. The retaining wall is fixed to the reinforced concrete slab. Course objectives they seem to crop up everywhere, like cell phone towers. The lateral forces from backfill is resisted by the weight of wall itself, and due to their massive nature, they develop little or no tension. In case of the wall is free from its upper edge retaining wall, the wall may. The following parameters influence the design of the retaining wall. Detailed design and plan development the bridge design bureau is normally responsible for producing the final wall plans and specifications, based on the. Masonry retaining wall design excel sheet retaining wall.

Worked example to accompany mbie guidance on the seismic design of retaining structures for residential sites in greater christchurch version 2 november 2014. Results from pre vious large scale retaining wall tests and field studies are presented. For retaining wall design, the applicable train liveload surcharge is the cooper e80, which can be approximated as 1,880 pounds per square foot per foot psfft of rail. We believe that a twelve degree setback maximizes the leverage achieved by a battered wall, while providing a finished retaining wall that fulfills the goal of more useable flat land. Surcharge large surcharge loads are induced on retaining walls in close proximity to track. Mar 16, 2018 retaining wall design spreadsheet masonry retaining wall design within sizing 1024 x 839 masonry retaining wall design excel sheet mounting a level panel tv on the wall is among. Design and detailing of retaining walls learning outcomes.