Aci 318 08 design of retaining wall with counterfort excelcalcs. Concrete retaining walls types 1 through 8 d10 series, 2. Week 08 reinforced concrete wall footing design example. Oct 16, 2017 types of retaining wall gravity wall made of plain concrete or brick masonry the stability of the wall is maintained by its own weight made up to a height of 3 m. Ce 437537, spring 2011 retaining wall design example 1 8 design a reinforced concrete retaining wall for the following conditions. Deflection generally governs design for cantilever walls more than 18 feet high. Design of sheet pile walls using truline composite wall sections design methods and examples introduction this report presents the recommended structural capacities for truline composite wall sections and a summary of design methods commonly used. N i n t h e d i t i o ndesign of reinforced concrete aci 31811 code edition jack c. This example is intended to be readily calculated by hand although a lot of structural spreadsheets and software such as prokon are available. Get your copy of the redirock design software when you want to be the goto resource for redirock designs, having a copy of geo5 redirock wall professional is the way to go. Reinforced concrete design of retaining wall ceref.
The purpose of this article to design a lowweight cantilever reinforced concrete retaining wall with shear key by using an optimization algorithm, which is programmed in matlab. Despite the many references, a single volume on retaining wall design for the professional practitioner and civil engineering student could not be found. 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. The detailed requirements in the provisions regarding explicit calculation of the deformation capacity of the yielding element are shown here. Reinforced concrete wall design basics mike oshea, p. Note that chapter 12 of sp17 specifically covers retaining walls. The 2014 crsi cantilever retaining wall design guide references aci 31814 and they also use all the typical provisions.
Examples of this include cip cantilever, mse and modular block walls. The other two forms of construction are covered in separate guides. Design of sheet pile walls using truline composite wall sections design methods and examples introduction this report presents the recommended structural capacities for truline composite wall sections and a summary of design methods commonly used to design cantilevered and anchored sheet pile structures. Design of reinforced concrete cantilever retaining wall. Reinforced concrete cantilever retaining wall analysis and design aci 31814 reinforced concrete cantilever retaining walls consist of a relatively thin stem and a base slab.
Design of cantilever sheet pile walls january 2015. With this powerful software, youll have the answers to all the toughest design challenges in your area. Design of retaining wall with counterfort according to aci 318 08. The following parameters influence the design of the retaining wall. Building code requirements for structural concrete aci 31814 and. Design and analysis of retaining walls 3 f crib walls or coffer dams are cells or units to be filled with soil or builtup members of pieces of precast concrete or metal and are supported by anchor pieces embedded in the soil for. Design example the following design example briefly illustrates some of the basic steps used in the allowable stress design of a reinforced concrete masonry cantilever retaining wall. Design a reinforced concrete retaining wall for the following conditions. Aci 31814 chapter 15 code, approved version, 20121024 1 1 chapter 15 walls 2 3 add the following definition to chapter 2. Please note that the gravity wall chart provided has specific heights for specific site and soil conditions. In this photo, increte contractors installed a pouredinplace decorative concrete wall system called stonecrete that creates deep relief stone walls with a variety of available textures and colors.
Updated and expanded throughout, this new edition covers nearly every type of retaining strucutre. Aci reinforced concrete design handbook coming in summer 2015. This guide covers the design of segmental concrete gravity retaining walls. Calculations per aci 31811, aci 53011, ibc 2012, cbc 20, asce 710. Reinforced concrete cantilever retaining wall analysis and. Types of retaining wall cantilever retaining wall it consists of a vertical wall called stem, heel slab and toe slab. Design of reinforced concrete nonload bearing shear wall. The base is divided into two parts, the heel and toe.
Retaining wall design of reinforced concrete structure. The prefabricated concrete counterfort retaining walls design strength moment and shear surpassed that of the existing system with an overall reduction in concrete volume of 57%. Spacings are chosen based on closest multiple of 3 for illustrative purposes, more. The stem may have constant thickness along the length or may be tapered based on economic and construction criteria. Learn how you can reshape the contours of your homes property and create flat space with the help of a retaining wall. Cantilever and restrained retaining wall design software. Worked example 2 design of concrete cantilever retaining walls to. Basics of retaining wall design civil engineering community. To further understand the designed approach, here is a worked example of the design of the retaining wall. Classification of retaining walls gravity wallmasonry or plain concrete. This code references aci 318, asce 7 and aci 530 for structural design issues. Grey wolf optimization gwo is an optimization technique which is developed by mimicking hierarchy and hunting methods of.
Mar 22, 20 basics of retaining wall design 9th edition design guide for earth retaining structures. The aci reinforced concrete design handbook provides many design examples of various reinforced concrete members based on the. This manual is intended to provide retaining wall designers, retaining wall installers and others with the information useful in the design, the construction and cost estimation of a recon retaining wall that will remain attractive and structurally stable for the duration of its intended design life. You get a 7 to 9 pages report output to document your retaining wall calculations. What is sp17 and does it provide more required information that goes along with the code requirements. Gravity retaining walls figure a are constructed with plain concrete or stone. Retained height ft wall height above soil ft slope behind wall. Masonry retaining wall design based on aci 53099 and aci 31802.
The purpose of this article is for the reader to fully understand the principle behind it. Id reference the aci provisions for beams and oneway slabs and the crsi design guide on cantilevered retaining walls, then design as youve always done. Reinforced concrete cantilever retaining wall analysis and design. Poured concrete retaining walls can also be decorative and reproduce the look of stone or masonry. This session is not intended to teach concrete design, but more of an awareness of why things are the way they are.
Basics of retaining wall design 9th edition design guide for earth retaining structures. Manual for design and detailing of reinforced concrete to. Optimum design of reinforced concrete cantilever retaining walls. Wisdot regional staff determines the need for permanent retaining walls on highway. Design and detailing of retaining walls engineering books. Gravity wallmasonry or plain concrete cantilever retaining wallrcc inverted t and l. Empirical design of concrete masonry walls keywords. Example 11 castinplace concrete cantilever retaining wall 3 2018 ev 3 ev 1 ev 2 ls v ls h eh dc dc 2 dc 4 dc 3 front face. In this example, the structural design of the three retaining wall components is performed by hand.
Reinforced concrete cantilever retaining wall analysis and design aci 31814. The following worked example is for a freestanding. Concrete retaining wall design spreadsheet download link. Cantilever retaining wall reinforced concrete wall with small dimensions and it is the most economical type and the most common note. Wsdot standard plan reinforced concrete retaining wall. Design of retaining wall with counterfort engineering. 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. Industry design and construction standards american concrete institute aci, american association of state highway and transportation officials aashto, etc. Gravity walls rely on their own weight and setback to hold up the soil behind them. Ncma tek national concrete masonry association an information series from the national authority on concrete masonry technology concrete masonry gravity retaining wallstek 156 structural 1995 keywords. Design toe, heel and stem slab according aci 31808. The retained material or backfill exerts a push on the structure and thus tends to overturn or slide it, or both.
Design principles of totally prefabricated counterfort. Design principles of totally prefabricated counterfort retaining wall system compared with existing castin. There are no additional requirements in sp17 that are not in aci 318. American concrete institute aci, american association of state highway and transportation officials aashto, etc. Usually the cantilever wall stem is of concrete block construction rising from an insitu concrete foundation. Weve got 8 different retaining wall designs, plus costs, to help enhance your landscape design. Usually the cantilever wall stem is of concrete block construction rising from an in situ concrete foundation. Retaining wall design example design a reinforced concrete.
Worked example to accompany mbie guidance on the seismic design of retaining structures for residential sites in greater christchurch version 2 november 2014. Retaining walls types details with analysis and design. When you want to be the goto resource for redirock designs, having a copy of geo5 redirock wall professional is the way to go. Recon gravity retaining walls recon wall systems, inc. Manual for design and detailing of reinforced concrete to the september 20 code of practice for structural use of concrete 20 2. 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. Civil engineering excel sheets or civil engineering spreadsheets are available here for free download for members these civil engineering spreadsheets contain complete design of the structural elements. Wisdot bridge manual chapter 14 retaining walls january 2019 147 14. Assuming that the allowable bearing pressure of the soil is 120 knm 2, the. Design horizontal reinforcement for shrinkage and expansion. Design of cantilever retaining wall as per aci 31805. Design concrete shear stress in wall section for inplane bending. Reinforced concrete design, design theory and examples by t.
Reinforced concrete stocky wall is where the effective height he divided by the thickness h does not exceed 15 for a braced wall and 10 for an unbraced wall. Cantilever concrete retaining walls are commonly used for residential purposes, often as integral basement walls. Engineering specifications and product data sheets for concrete retaining walls, landscaping walls, columns, steps and pavers. Design the reinforced concrete masonry cantilever retaining wall shown in figure 2.
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. Dec 12, 2017 design reinforced concrete wall footing example based on aci code here is a link to examples pdf file. Basics of retaining wall design 10 editionth a design guide for earth retaining structures contents at a glance. Example 11 castinplace concrete cantilever retaining wall 2 2020 resistance factors when not provided in the projectspecific geotechnical. Sp17 is a document that provides additional explanatory text, design examples that illustrate aci 318 code provisions, and design aids that assist with the use of aci 318. However, retaining walls can also be constructed for aesthetic landscaping purposes.
Design of reinforced concrete cantilever retaining wall using. In 1990 the concrete masonry association of australia cmaa published masonry walling guide no 4 design for earth loads retaining walls, which set out a design methodology for earth retaining structures. Worked example 2 design of concrete cantilever retaining. D ata sheet concrete retaining walls concrete retaining walls provide a durable solution that is required of a structure in contact. Sp17 is a document that provides additional explanatory text, design examples that illustrate aci 318 code provisions, and design aids that assist. If you want to design a retaining wall on drilled piers and grade beam, go to this page. Mar 04, 2019 to further understand the designed approach, here is a worked example of the design of the retaining wall. If you are not sure of your site conditions we recommend being conservative with your retaining wall heights or use geogrid in your retaining wall. Retaining wall with moment at the base of stem plus axial load. This reinforced concrete design handbook was developed in accordance with acis newly reorganized 31814 building code requirements for structural concrete, and will serve as an invaluable companion to aci 31814. Lateral forces on retaining wallsence 454 assakkaf design of retaining walls the design of retaining wall must account for all applied loads. Grey wolf optimization gwo is an optimization technique which is developed by mimicking hierarchy and hunting methods of grey wolves. Sep 20, 2017 design of retaining wall with counterfort according to aci 318 08 retaining structures hold back soil or other loose material where an abrupt change in ground elevation occurs. Reinforced concrete cantilever retaining wall analysis and design aci 318m14 reinforced concrete cantilever retaining walls consist of a relatively thin stem and a base slab.