Design of flexible pavement on iitpave software as per irc. Different combinations of base and surfacing course for flexible pavement for the purpose of the guideline, suggested in irc. The pavement designs are given for subgrade cbr values ranging from 2% to 10% and design traffic ranging from 1 msa to 150 msa for an av. Design of rigid pavement by irc method and its critical. Flexible pavement aspects of basic design as per irc. Pavement design is one of the most important aspects of any transportation project. Comparative design of flexible pavement using different. According to irc recommendation, the california bearing ratio cbr value of subgrade is used for design of flexible pavements. Rajib chattaraj superintending engineer public works directorate 7th september2019 govt. Crosssectional elements, horizontal and vertical alignments, geometric design of intersections rotaries etc. Flexible pavement layers reflect the deformation of the lower layers on to the surface layer 3 4. The initial traffic in the year of completion in each direction is 150 cvpd and growth rate is 5%.
Nov 20, 2016 failures of flexible pavements design consideration. Indian roads congress has specified the design procedures for flexible pavements based on cbr values. The flexible pavement design is done, in india, as per irc. Design and analysis of flexible pavement in amaravati. It becomes the prime importance to design a durable and economic pavement structure. Design principles pavement components and their role. Example 2 given in paragraph 7 illustrates the design procedure for. North dakota cone, cbr, irc37, burmister, triaxial kansas, aashto method of design. Then we analyse the pavement using software iitpave and compare with the alternate pavements available in the irc.
Jun 05, 2019 flexible pavement layers reflect the deformation of the lower layers on to the surface layer 3 4. The earlier code is empirical in nature which has limitations regarding applicability and extrapolation. Date 2020 flexible pavement design manual fpdm 2020 implementation letter. Abstractin this paper a comparison of thickness design methods is being presented. Functional evaluation and overlay design of existing. As per irc code, 90th percentile subgrade cbr is to be used in the calculation for the design of flexible pavement such as expressway, nh, sh, and urban roads. Nptel civil engineering introduction to transportation. Design the pavement for construction of a new two lane carriageway for design life 15 years using irc method. Study on analysis of flexible pavement using finite element. The need for the revision arose to include design charts using stabilized base and sub base courses as also to enable design of rural roads for trafficvolume upto 2 msa. There are many methods across the globe for designing the flexible pavements. Design of flexible pavement on iitpave software as per irc 37.
Design principle empirical method based on lo ad distribution characteristics of the component s d esigned and analyzed by usin g the elastic theor y material granular material made of c ement c oncrete either plan, reinforced or prestressed concrete. A guide to airfield pavement design and evaluation dmg27. Use the download button below or simple online reader. Cbr method recommended by california state of highways. Guidelines for strengthening of flexible road pavements using benkelman beam deflection technique first revision legally binding document step out from the old to the newjawaharlal nehru. Design of flexible pavement for traffic over 1,00,000. Rigid pavements have sufficient flexural strength to transmit the wheel load stresses to a wider area below. Introduction the design of flexible pavement involves the interplay of several variables, such as, the wheel loads, traffic, climate, terrain and subgrade conditions. The design procedure given by irc makes use of the cbr value, million standard axle concept, and vehicle damage factor. A new four lane divided highway is to be constructed on a subgrade of cbr 1. Traffic analysis and design of flexible pavement with. Flexible pavement design subcommittee personnel given below, set up.
Poor and inadequate design may result to reduce the life of flexible pavement and increase the annual maintenance cost. How to calculate thickness of pavement pavement design flexible indian road congress irc. Embankment, subgrade, subbase and base courses, bituminous surface courses, internal and surface drainage of pavements, pavement evaluation, maintenance and strengthening. With a view to have a unified approach for working out the design of flexible pavement in the. Indian roads congress irc designator of legally binding document. January 2005 implementation memo flexible pavement design manual. For example cbr of 8% and traffic of 20 msa will get the followin. Compared to flexible pavement, rigid pavements are placed either directly on the prepared subgrade. Subgrade cbr evaluation for the design of new roads the following 4 methods are available for the estimation of subgrade cbr.
Irc method of design of flexible pavement 1 slideshare. Benkelman beam is used to evaluate the structural properties of the pavement as per irc. Based on the performance of existing designs and using analytical approach, simple design charts and a catalogue of pavement designs are added in the code. Engineers are cautioned that much of pavement design is governed by codes, specifications and practices of public agencies. Subbase thickness10 subbase modulus30,000 psi subgrade m r10,000 psi to get k. An attempt will be made to study the life cycle cost of different pavements. Guidelines for the design of flexible pavements second revision 200. Pavement thickness design charts for the design of pavements to carry traffic in the range of 1 to 10 msa, use chart 1 and for traffic in the range 10 to 150 msa, use chart 2 of irc.
Flexible pavement design by california bearing ratio method. Design of rigid and flexible pavements by various methods. The pavement designs given in the previous edition irc. Flexible and rigid pavements, principles of design, empirical and analytical design procedures.
Analysis of design of a flexible pavement with cemented base and. Indian roads congresss code irc37 for design of flexible pavements was. Tentative guildelines for the design of flexible pavements legally binding document step out from the old to the newjawaharlal nehru invent a new india using knowledge. In an example to compare the two designs, the road note 29 method gave a total pavement thickness which was 100mm thicker than that required by irc. The design and evaluation methods presented in this guide are developments of previous methods, incorporating the benefits of additional experience and research. For low volume roads the maximum esal considered is 1 million in its design life. The aircraft pavement classification system incorporated in this guide is the icao acnpcn. This is an introduction to rigid pavement design for engineers. Cut across the e sb cut across m r to the tl vertically meet other line read kvalue k600pci topic 10 aashto rigid pavement design figure 12. Permeable pavement design example september 2010 proposed conditions. Introduction to rigid pavement design ced engineering. From the data obtained, flexible pavement will be designed with the help of guidelines mentioned in irc. A design example of flexible pavement n 50 msa projected traffic design. The design curves relate pavement thickness to the cumulative number of standard axles to be carried over the design life for different subgrade cbr.
Flexible pavement aspects of basic design as per irc method rajib chattaraj superintending engineer public works directorate govt. Ppt flexible pavement aspects of basic design as per irc. Various design parameters has been compared and the basic difference between the two methods is analyzed. The design of pavement may affect by the material which is used as. The file extension pdf and ranks to the documents category. Flexible pavement aspects of basic design as per irc method, irc 372018. This design manual addresses methods to properly develop a rehabilitation project, pavement milling, and the computations necessary for the pavement design process. The design of typical airfield flexible pavements will be further discussed in chapters 4 and 5. Oct 28, 2015 irc 37 2001 guidelines for the design of flexible pavements 2nd revision there is document irc 37 2001 guidelines for the design of flexible pavements 2nd revision available here for reading and downloading. Irc method of design of flexible pavements civil iitb. And, 80th percentile subgrade cbr is to be used in the calculation for the design of flexible pavement for other types of roads. Properties flexible rigid design principle empirical method based on lo ad distribution characteristics of the component s d esigned and analyzed by usin g the elastic theor y material granular material made of c ement c oncrete either plan, reinforced or prestressed concrete flexural s trength low or negligible flexible. Pavement is a structure engineered to carry vehicular loading.
Generally there are two methods to design the pavement from cbr california bearing ratio value. Structural evaluation of pavement deflection is the structural property of the pavement. The objective of this method of design is, to design the pavement structure to control rut. Flexible pavement design by cbr method is used to determine the total thickness of pavement. Flexible pavement aspects of basic design as per irc method. Study on analysis of flexible pavement using finite. Initial traffic after construction cvpd traffic growth rate during the design life by studying the past trends of traffic growth as per the econometric procedure outlined in irc. Functions, specifications and evaluation, bituminous mix design. It is not intended as definitive treatise, and it does not encompass the design of flexible pavements.
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