Formation level m foundation level m height of the wall above the ground level m depth of foundation below ground level m. It is time consuming to do all the stability and reinforcement design using in house tools. Worked example 2 design of concrete cantilever retaining. Ce 537, spring 2011 retaining wall design example 2 8 substituting eqn. Obtain soil samples of the foundation soil and backfill to determine the. Course objectives they seem to crop up everywhere, like cell phone towers. The stem is a vertical cantilever beam, acted on by the horizontal earth pressure. Ce 437537, spring 2011 retaining wall design example 3 8 3. Design and detailing of retaining walls learning outcomes. The safety factor against sliding minimum required f. Analysis and design of cantilever retaining wall using. Aesthetic elements surrounding a particular retaining wall are key to public acceptance of a wall project.
Active earth pressure tends to variation of earth pressure deflect the wall away from the 5. Cantilever concrete retaining walls are commonly used for residential purposes, often as integral basement walls. We require this information in order to email you a working demo. Worked example 1 design of cantilever pol retaining walls. Table 1 provides the order of precedence for reference documents and. Retained height ft wall height above soil ft slope behind wall. Concrete masonry reinforced cantilever retaining walls. Basics of retaining wall design 10 editionth a design guide for earth retaining structures contents at a glance.
Mcgrawhill international edition, 1997 may be referred. P a active earth pressure or earth pressure pa and passive earth pressure pp. Reliability analysis of counterfort retaining walls. Cantilever retaining wall functions and design considerations. The load that presents the greatest problem and its primary concern is the lateral earth pressure induced by the retained soil. Pro v8i, the latest version, allows civil engineering individuals to analyze structural designs in terms of factors like force. Figure 1reinforced cantilever retaining wall detailing mortar cap or other, as desired bond beam. Calculations clearcalcs clearcalcs structural design.
Trbs national cooperative highway research program nchrp report 611. Results from pre vious large scale retaining wall tests and field studies are presented. Figure 1 illustrates typical cantilever retaining wall detailing requirements. Chapter 7 retaining walls seismic analysis and design of. Example 11 castinplace concrete cantilever retaining wall 4 2020 summary of unfactored loads and moments resolve moments about point a see figure 1 typical section load combinations ev 1 ev 2 dc 2 dc 3 vehicular collision load 18. The computation programs have been developed and validated by taking an example design. Type of retaining wall failure to design retaining walls, it is necessary to know how wall can fail. The following parameters influence the design of the retaining wall. Lateral forces on retaining wallsence 454 assakkaf design of retaining walls the design of retaining wall must account for all applied loads. Results show that heuristic optimization algorithms can be. That works adjacent to the retaining wall structure complies with the design parameters noted above.
The home ownercontractor is then faced with the problems of. The contract documents and contract requirements are discussed in. The design of the above retaining wall structures must consider all the constraints. Analysis and design of cantilever retaining wall using prokon. For details of other type the book foundation analysis and design by j. Assuming that the allowable bearing pressure of the soil is 120 knm 2, the. Design according to fdot structures manual current edition. The retaining wall designs on the enclosed design tables were performed using the national concrete masonry association ncma srwall 3. Curtains of gravity wall with height of cantilever retaining wall design example pdf file every day. 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. The wall weight is estimated to be halfway between fully grouted. Deflection generally governs design for cantilever walls more than 18 feet high. Design of cantilever pole retaining walls to resist earthquake loading for residential sites. Retainpros custom design reports offer a robust summary of design parameters, stem and footing design and all calculated results.
Cantilever retaining wall are usually of reinforced concrete and work on the. These design methods are discussed in detail in allowable stress design of concrete masonry, tek 147a, and strength design of concrete masonry, tek 144a refs. National academies of sciences, engineering, and medicine. Reinforced masonry design requires that a groutreinforcement spacing be assumed. Cantilever retaining wall ouestion for the retaining wall and the profile shown below, calculate. The basic design precepts employed in cantilever walls include considerations of dead man tiebacks, taking active pressures to the bottom of the wall and considering any reductions in passive resistance for inclined slopes. Worked example to accompany mbie guidance on the seismic design of retaining structures for residential sites in greater christchurch version 2 november 2014. Hence they provide a lateral support to vertical slopes of soil that would otherwise collapse into a more natural shape. Retaining walls are structure used to retain soil, rock or other materials in a vertical condition. 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. There are another type of retaining wall called counterfort rw and is a. In this example, the structural design of the three retaining wall components is performed by hand.
Rubble retaining wall design pdf retaining wall design 10 edition th. Examples of this include cip cantilever, mse and modular block walls. Pdf design of reinforced cantilever retaining walls using. Calculations per aci 31811, aci 53011, ibc 2012, cbc 20, asce 710. Most common materials used for retaining walls are. D ata sheet concrete retaining walls concrete retaining walls provide a durable solution that is required of a structure in contact. The grout spacing affects the wall weight, which in turn affects the seismic load. Worked examples of retaining wall design to bs8002 the following worked examples have been prepared to illustrate the application of bs8002 to retaining wall design. Read seismic analysis and design of retaining walls.
Retaining walls in theory and practice, a textbook for. This wall is designed for active earth pressure and live load surcharge pressure the loads for the purpose of design are calculated per meter length of wall. Abdel raouf and others published retaining wall find, read and cite all the. 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. Soilstructure software increases the engineers bottom line by eliminating hours of tedious calculations. In order to avoid adversely affecting the structural integrity of the retaining wall each land owner has a responsibility to ensure the following including making builders or tenants aware. Cantilever timber pole walls are probably the most commonly used form of.
The following figure shows theses different types of retaining walls. Mechanically stabilized earth mse retaining walls are growing in popularity. Positive connection system design guide redirock retaining. Seismic analysis and design of retaining walls, buried structures, slopes, and embankments explores analytical and design methods for the seismic design of retaining walls, buried structures, slopes, and embankments. 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.
Cantilever retaining wall design example pdf document. This gl pressure tends to deflect the wall outward. Determine the factors of safety against sliding and overturning. Retaining wall quantities shall not include concrete nor reinforcing steel for traffic railingsjunction slab. Oct 12, 2017 analysis and design of cantilever retaining wall using prokon. Finding an engineer willing to engineer a segmental srw mechanically stabilized. Download cantilever retaining wall design example pdf doc. Mr twiddle fetches polly and other stories, enid blyton, 2008, childrens stories, 192 pages. A selection of everpopular blyton short stories for the younger reader, with clear text and illustrated. Usually the cantilever wall stem is of concrete block. Pro is one of the most widelyused software for developing and analyzing the designs of various structures, such as petrochemical plants, tunnels, bridges etc. In designing retaining walls, an engineer must assume some of their. Ce 437537, spring 2011 retaining wall design example 1 8 design a reinforced concrete retaining wall for the following conditions.
In total, the project required 7,800 redirock blocks. Cantilever and restrained retaining wall design software. To install the geogrid for a pc system wall, a 12 wide strip of geogrid was wrapped through each retaining wall block, tying the redirock facing blocks to the reinforced soil mass with a weightindependent positive connection. Retaining walls in theory and practice, a textbook for students. Design of the retaining wall structures on the m4 smart motorway.