The construction of a concrete retaining wall shall conform to the dimensions and reinforcing steel requirements shown in figure and table 2. Application to the story nehrp reinforced concrete framewall building 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. Seismic design categories b through f skga web seminar dvd with pdf handout s. Seismic design categories b through f skga web seminar dvd with pdf handout. Standard a description of the analysis method design tables for a limited range of soil conditions and wall geometry a design example which demonstrates the use of the australian standard and analysis method analysis of cohesive soils a site investigation check list a detailed. The objective of this research was to conduct a field performance study on a full scale cantilever retaining wall in order to verify or modifyu current design. The use of the city of alexandria typical retaining wall details for a tiered or stacked retaining wall system is strictly prohibited. Design concrete shear stress in wall section for inplane bending. A copy of these retaining wall details is required to be on the job site and available to the inspector during the construction and inspection process. Pdf optimal design of reinforced concrete retaining walls. Example the example of analysis and design of stepped cantilever retaining wall. 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. This is not meant to be a final authority as each project has its own set of unique situations.
Cantilever retaining walls are investigated, being representive of reinforced concrete retaining corresponding. Dowels can be lapped above the footing in accordance with figure 14. This session is not intended to teach concrete design, but more of an awareness of why things are the way they are. Cantilever concrete retaining walls are commonly used for residential purposes, often as integral basement walls. 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. Basics of retaining wall design 10 editionth a design guide for earth retaining structures contents at a glance. Designs are in general accordance with ncmas design manual 6.
Assuming that the allowable bearing pressure of the soil is 120 knm 2, the. The following figure shows the cantilever retaining wall. Aci e702 example problems buried concrete basement wall l. Types of retaining wall cantilever retaining wall it consists of a. Instructional material complementing fema 451, design examples design for concrete structures 11 1 seismic design of reinforced concrete structures topic 11 is the seismic design of reinforced concrete structures, primarily buildings. The other two forms of construction are covered in separate guides. Babu2 proposed an approach for reliabilitybased design optimization of reinforced concrete cantilever retaining wall. Concrete masonry reinforced cantilever retaining walls. Ahmadinedushan and varaee 3 used pso for optimal design of reinforced concrete earth retaining walls. Reinforced concrete design of retaining wall ceref. Concrete masonry reinforced cantilever retaining walls edition e3, may 20. 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. With this powerful software, youll have the answers to all the toughest design challenges in your area.
They are the simple unreinforced vertical face gravity retaining wall, the steel reinforced cantilever retaining walls, and the segmental retaining wall. The formulation of the problem includes important design variables such. Usually the cantilever wall stem is of concrete block construction rising from an insitu concrete foundation. Design of reinforced concrete wall guidelines, concept. Dec 27, 2014 method statement for retaining wall work execution retaining wall work shall be taken up for a length of 10m to 20m to suit the site condition duly considering the safety aspect. Worked example to accompany mbie guidance on the seismic design of retaining structures for residential sites in greater christchurch version 2 november 2014.
Stability of srw gravity walls depends solely upon the dead weight resisting moment. Reinforced concrete retaining walls have a vertical or inclined stem cast with. Basics of retaining wall design civil engineering community. Figure 1reinforced cantilever retaining wall detailing mortar cap or other, as desired bond beam. Weve got 8 different retaining wall designs, plus costs, to help enhance your landscape design. Pdf this paper concerns with the optimal design of reinforced concrete earth retaining walls.
Learn how you can reshape the contours of your homes property and create flat space with the help of a retaining wall. Design of semi gravity retaining walls 1 a semi gravity retaining wall consisting of plain concrete weight 145 lbft. Retaining walls must be reinforced in order to be effective. Results from pre vious large scale retaining wall tests and field studies are presented. Reinforced soil retaining wallsdesign and construction nptel. D ata sheet concrete retaining walls concrete retaining walls provide a durable solution that is required of a structure in contact. Reinforcing steel shall comply with astm a615 and shall have a yield strength of 60,000 psi. In recent years, successful applications of particle. Figure 1 illustrates typical cantilever retaining wall detailing requirements. Preliminary wall height guides retaining wall blocks.
The example follows the provisions of aci 31811, building code requirements for structural concrete. The stem may have constant thickness along the length or may be tapered based on economic and construction criteria. Pdf optimal design of reinforced concrete retaining walls using. 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. Design a reinforced concrete retaining wall for the following conditions.
Retaining wall construction details for wall design and. The design and planning phase of retaining walls is critical and must address the actual site conditions, including soil and loading, that the wall will be subjected to. This study presents analyses and design of cantilever retaining wall which is made from an internal stem of steel reinforced, castinplace concrete often in the shape of an inverted t. Classification of retaining walls gravity wallmasonry or plain concrete. Buried concrete basement wall design problem statement provide a detailed strength design durability and other considerations not included for a new buried concrete basement wall in a singlestory masonry building using the given information. 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. The wall design shall address both internal and external 2. 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.
A minimum cost based design of reinforced concrete retaining structures was undertaken by ceranic et al 3. Design of reinforced concrete wall concept, calculations reinforced concrete wall is designed as a compression member. Ce 537, spring 2011 retaining wall design example 1 8 design a reinforced concrete retaining wall for the following conditions. 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. Design horizontal reinforcement for shrinkage and expansion. The following parameters influence the design of the retaining wall. Masonry retaining wall design based on aci 53099 and aci 31802. Retaining wall design example design a reinforced concrete. To find the optimum solution, the particle swarm optimization pso algorithm is employed. Reinforced concrete wall design basics mike oshea, p. Design load is a vertical load of 40 lbft at an eccentricity of 4 inches outside the wall seismic design. Method statement for retaining wall work execution retaining wall work shall be taken up for a length of 10m to 20m to suit the site condition duly considering the safety aspect.
Ncma tek national concrete masonry association an information series from the national authority on concrete masonry technology concrete masonry gravity retaining walls tek 156 structural 1995 keywords. Design for earth loads retaining walls, which set out a design. Reinforced concrete wall is used in case where beam is not provided and load from the slab is heavy or when the masonry wall thickness is restricted. Too many forces are at work against a retaining wall that could cause it to tumble over if it is not reinforced correctly. Fairfax county, virginia home to home inspection inc.
May 29, 2018 the intent of this material is to communicate the best practices for design of segmental retaining walls srw as determined by allan block corporation based on 25 plus years of research, design and field experience. Design of concrete cantilever retaining wall civil. Three different types of concrete masonry retaining walls are illustrated in figure 1. Ahmadinedushan and varaee 3 used pso for optimal design of reinforced concrete earthretaining walls. With this powerful software, youll have the answers to all the toughest. Ce 437537, spring 2011 retaining wall design example 1 8 design a reinforced concrete retaining wall for the following conditions. The bank of supported earth is assumed to weigh 110 lbft.
The base is divided into two parts, the heel and toe. In this example, the structural design of the three retaining wall components is performed by hand. The minimum concrete compressive strength at 28 days shall be 3,500 psi and shall comply with aci 318. 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. During this lesson you will learn the basics of seismic design of reinforced concrete buildings. Reinforced concrete footings, steel reinforcing, or mortar are not used. Mse retaining wall design considerations by marcus galvan, p. Mse retaining wall design considerations by marcus galvan. Retaining walls types details with analysis and design. Topic 11 seismic design of reinforced concrete structures. The wall is braced top and bottom against lateral translation.
Types of reinforced concrete retaining wall and their parts. The design example, buried concrete basement wall design, details strength design durability and other considerations not included for a new buried concrete basement wall in a singlestory masonry building. The formulation of the problem includes important design variables such as the geometrical. The total height of different types of retaining wall shall be cast in 2 or 3 pours, keeping the maximum height of pour of 2. Pdf optimal design of reinforced concrete retaining. Three numerical examples with different wall heights. The following worked example is for a freestanding cantilever wall that is considered sufficiently flexible for active soil pressures to be used for design. Cantilever retaining walls figure b are made of reinforced concrete that. Design of reinforced concrete load bearing shear wall. A reinforced concrete load bearing shear wall supporting for a four story building. This guide covers the design of segmental concrete gravity retaining walls. In 1990 the concrete masonry association of australia cmaa published masonry walling guide no 4. Types of retaining wall cantilever retaining wall it consists of a vertical wall called stem, heel slab and toe slab. The focus of the guideline is the geotechnical aspects of retaining wall design.
Panel diaphragms have been used extensively for roofs, walls, floors and partitions, for both new construction and rehabilitation of older buildings. Following are the types of reinforced concrete retaining walls. Reinforced concrete masonry cantilever reaining walls. Example 5 design a reinforced concrete bearing wall to support a series of steel wideflange beams at 8 ft0 in. 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. 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. Wsdot standard plan reinforced concrete retaining wall. Cantilever retaining walls are most commonly and widely used type of retaining wall.
Design load is a vertical load of 40 lbft at an eccentricity of 4 inches outside the wall seismic design category a use the 2012 ibc required. 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. Concrete masonry retaining walls meet these requirements admirably. 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. Costbased optimum design of reinforced concrete retaining. 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.
A sufficient anchorage would need to be provided at the top of the wall to carry 30 lbft. Retaining wall design of reinforced concrete structure. Cantilever concrete retaining walls are commonly used for residential. Fairfax county, virginia typical retaining wall details sheet 7 of 8 concrete retaining walls general requirements 1. Reinforced concrete a fundamental approach fifth edition retaining walls ence 454 design of concrete structures department of civil and environmental engineering university of maryland, college park spring 2004 by dr. This study presents analyses and design of cantilever retaining wall which is made from an internal stem of steelreinforced, castinplace concrete often in the shape of an inverted t. Design of semi gravity retaining walls wec civilians. The intent of this material is to communicate the best practices for design of segmental retaining walls srw as determined by allan block corporation based on 25 plus years of research, design and field experience. Typical retaining wall details package based on the 2006 virginia construction code contents timber retaining wall. Basics of retaining wall design 9th edition design guide for earth retaining structures. Design of reinforced cantilever retaining walls using.
Mar 22, 20 basics of retaining wall design 9th edition design guide for earth retaining structures. Updated and expanded throughout, this new edition covers nearly every type of retaining strucutre. 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. Component quality is important due diligence when a designer issues a design certificate a form 15 in queensland, the design is being certified against a specified criteria, for example as 4678, earth retaining structures code. The cantilever is the most common type of retaining wall and is used for walls in the range of 3to 6m in height. This force is smaller than the 30 lbft anchorage force from a 5 psf uniform lateral load see example a. Reinforced concrete cantilever retaining wall analysis and.
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