Analysis of counterfort retaining wall with and without pressure relief shelf using soft computing technique article pdf available december 2016 with 2,622 reads how we measure reads. Design of retaining wall with counterfort according to aci 318 08. The safety factor against sliding minimum required f. Counterfort wall concrete design eurocode standards. The contractor will use guidance provided in exhibit a.
Design guidelines earth retaining systems are to field check plans stage. Name 120106039 kaizer dave 120106045 kishan vyas 120106061 binoy patel internal guide. Counterfort retaining wall design example using asdip retain duration. Design of a counterfort retaining wall researchgate. Hi all, does anyone out there have any information or examples for the design of a counterfort retaining wall. Retaining walls such as mse walls with precast concrete panel facing that are. Within the hardtomiss suidynasty trinity of buddha and bodhisattvas is the largest statue. All the above methods have been discussed with an example of typical counterfort retaining wall.
Department of civil engineering design of reinforced concrete structure 2170607 counterfort retaining wall gandhinagar institute of technology. The design of a counterfort retaining wall is similar in many respects to that of a cantilever retaining wall as far as computing overturning and sliding stability, bearing capacity, and soil. This example of rock cut architecture contains over buddhist sculptures and over square meters of mu. Height of retaining wall for saturated soil pressure, h1height of retaining wall for submerged soil pressure, h2. The following parameters influence the design of the retaining wall. And require design consistent with either cantilever or counterfort design. A complete design should address each of these modes of failure where appropriate. It includes the design of counterfort retaining walls based on the ibc aci 318 provisions. Design of retaining wall with counterfort engineering. It is a power point presentation on counterfort retaining wall. In this example, the structural design of the three retaining wall components is performed by hand. Calculate and compare active and passive earth pressures for both the cases. Cantilever concrete retaining walls are commonly used for residential purposes, often as integral basement walls. Some common materials used for retaining walls are treated lumber, concrete block systems, poured concrete, stone, and brick.
Worked example to accompany mbie guidance on the seismic design of retaining structures for residential sites in greater christchurch version 2 november 2014. Retaining wall are generally used to retain earth or other material to maintain unequal levels on two faces. The load that presents the greatest problem and its primary concern is the lateral earth pressure induced by the retained soil. Counterfort retaining wall design excel jobs, employment. Discover everything scribd has to offer, including books and audiobooks from major publishers. Counterfort retaining wall guidelines for design of counterfort retaining walls pillai and menon, 2009 are available at. Calculation of frequency of retaining wall by back propagation neural network. D ata sheet concrete retaining walls concrete retaining walls provide a durable solution that is required of a structure in contact. Worked example 2 design of concrete cantilever retaining.
Cantilever retaining wall ouestion for the retaining wall and the profile shown below, calculate. Pdf this paper outlines a method for analyzing the dynamic response of counterfort. Cantilever retaining walls figure b are made of reinforced concrete that. We stand for making engineering education a practical approach. 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 distribution of grain size in a soil sample is. The thickness of the stem between counterforts is thinner than for cantilevered walls and spans horizontally, as a beam, between the counterfort wing walls. At this stage it is important to discuss the differentiating points between retaining wall and flood wall.
Department of civil engineering design of reinforced concrete structure 2170607. Counterfort cantilevered retaining walls incorporate wing walls projecting upward from the heel of the footing into the stem. Functions and parts of these retaining walls are discussed. Asdip retain is a structural engineering software for design of retaining walls. Deflection generally governs design for cantilever walls more than 18 feet high. After this present you will be able to do the completecomplete design design andand detailingdetailing ofof. Concrete retaining walls may be considered in terms of three basic categories. The geotechnical failure modes, which need to be considered in the design of a counterfort retaining wall are i horizontal sliding along the base of the wall, ii the rotation about the toe of the wall overturning, and iii bearing capac. Site has some constraints which wont allow me to raise the base. There are two phases in the design of a conventional retaining wall. The counterfort wall is more commonly used because it has a clean, uncluttered exposed face and allows for more efficient use of space in front of the wall. I35w retaining wall design exhibit a draft scope of work. The void ratio and angle of internal friction of the backfill respectively are 0. Gravity retaining wall 3 cantilever retaining wall with shear key batter drainage.
Retaining walls types details with analysis and design. Retaining counterfort wall design bending deep foundation. Missouri university of science and technology scholars mine. Retaining counterfort wall design free download as pdf file. The big buddhas at the maijishan caves, gansu, china. Following is a graphical overview of the required design steps, with annotated screenshots of the software. How to design counterfort retaining walls using asdip. Lateral forces on retaining wallsence 454 assakkaf design of retaining walls the design of retaining wall must account for all applied loads. Design considerations and alternatives for retaining walls. 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. This approach is very useful for new less experienced civil engineers for optimum design of counterfort earth retaining wall.
Foundation engineering retaining walls elements of retaining walls each retaining wall divided into three parts. Types of retaining walls concrete retaining wall may be considered in three basic categories. The retained material or backfill exerts a push on the structure and thus tends to overturn or slide it, or both. Worked example to eurocode 2 eurocodes are one of the most advanced suite. Mass walls of ungrouted stone, sheet piles, crib walls and mechanically reinforced earth walls that support rightofway except as part of. As an example, consider the retaining wall shown below, which supports a flat backfill load. A counterfort retaining wall with dry cohesionless backfill c 0. The system further includes a counterfort beam coupled at a first end to. Counterfort retaining wall but the designer has not taken into account the considerations followed for the design of flood wall. The judgment was wrong and the whole structure collapsed. Concrete building design ii gravity wall gravity walls depend on their mass stone, concrete or other heavy material to resist pressure from behind. Provide the distribution steel 25 design example cantilever retaining wall.
Design and detailing of retaining walls learning outcomes. First, with the lateral earth pressure known, the structure as a whole. The following section presents the formulation reliability index or probability of failure vs. Wall typical section concrete counterfort wall height range h 30 to 60 ft 9 to 18 m. The contract documents and contract requirements are discussed in. Staad pro retaining wall cantilever design in details. Validate that calculations include applicable soil parameters utilized in the wall design. Counterfort retaining wall architecture britannica. Counterfort retaining wall design example using asdip retain. Whereas, if bracing is in front of the wall and is in compression instead of tension, the wall is called buttress retaining wall. Concrete masonry reinforced cantilever retaining walls edition e3, may 20 isbn 0 909407 56 8. A counterfort retaining wall system includes a plurality of wall panels and a face joint member positioned between a first wall panel and a second wall panel.
Design of retaining wall with counterfort according to aci. Pdf analysis of counterfort retaining wall with and. In such a case counterforts having trapezoidal section fixed at the base slab are provided at intervals of 1. 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. This document is a stepbystep design example of a typical counterfort retaining wall using asdip retain. Retaining wall rww3 is estimated to be in excess of 29 feet. Because this phase can be labor intensive, it is important not to begin work until consensus on the proposed wall. Counterfort retaining walls 1 gravity retaining walls gravity retaining walls figure a are constructed with plain concrete or. Pdf counterfort retaining walls under earthquake force. Counterfort wall problem example civil engineering. Within these groups many common variations exist, for example cantilever walls may have additional supporting ties into. A counterfort retaining wall is a cantilever wall with counterforts, or buttresses, attached to the inside face of the wall to further resist lateral thrust. Types of reinforced concrete retaining wall and their parts. Most likely location is at the base of the wall where the stem connects to the foundation.
Design of retaining wall building civil engineering. Examples of this include cip cantilever, mse and modular block walls. Pdf analysis of counterfort retaining wall with and without. Design of peripheral retaining wall at basement level for bus parking area at 4. Section showing counterfort retaining wall for bus parking area at 4. Possible modes of failure for freestanding concrete cantilever retaining walls are illustrated in cartoon fashion in figure x. It includes the design of counterfort retaining walls based on the latest aci provisions. Retaining walls are usually built to hold back soil mass.
Asdip retain is a structural engineering software for the design of retaining walls. The face joint member is partially positioned on a first side of the wall panels and extending between the wall panels through to a second side of the wall panels. Aci 318 08 design of retaining wall with counterfort rev1. 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. Reinforced concrete wall design basics mike oshea, p. 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. This session is not intended to teach concrete design, but more of an awareness of why things are the way they are.
This document is a stepbystep design example of a typical. Other articles where counterfort retaining wall is discussed. Reliability analysis of counterfort retaining walls. Types of reinforced concrete retaining walls are cantilever retaining walls and counterfort retaining walls. A counterfort wall of 10 m height retains a noncohesive backfill.