Then we analyse the pavement using software iitpave and compare with the alternate pavements available in the irc. Design procedures for flexible pavements, structural design is mainly concerned with determining appropriate layer thickness and composition. Dec 03, 2017 design of flexible pavement eswl equivalent single wheel load highway lec24 gate duration. Jointed plain concrete pavement jpcp continuously reinforced concrete pavement crcp pavement design. Flexible pavement layers reflect the deformation of the lower layers on to the surface layer 3 4. Irc method of design of flexible pavements design traffic the method considers traffic in terms of the cumulative number of standard axles 8160 kg to be carried by the pavement during the design life. Can use load spectra instead of esals computationally. Figure 2 depicts the distribution of the imposed load to the subgrade.
Pavement designs given in the previous edition irc. An attempt will be made to study the life cycle cost of different pavements. Design of flexible pavement eswl equivalent single wheel load highway lec24 gate duration. Flexible pavement aspects of basic design as per irc method, irc.
Abstractin this paper a comparison of thickness design methods is being presented. However, reorganizational changes have resulted in a decision to issue this guidance as a standalone document under the title of adot pavement design manual. Standard specification and code of practice for water bound macadam. The california bearing ratio cbr value of the subgrade soil was the basis for the method of design of flexible pavements, developed originally by the california state highway department, and adopted by the road research laboratory, london, for developing their own design procedure and design charts. Generally there are two methods to design the pavement from cbr california bearing ratio value. Goliya, journalinternational journal for scientific research and. There are two types of pavements based on design considerations i. Comparative studies of flexible and rigid pavement design methods. Design of flexible pavement is done as per the recommendations made in irc. Lecture 36 flexible pavement design indian roads congress. For most flexible pavement design work, especially highervolume highways 10,000 adt, 5 m esals, the flexible pavement design system fps 21 is the required method for designing flexible pavements. Cbr method recommended by california state of highways.
Design strategy the design of pavement varies with soil conditions and the amount of traffic expected to be carried during its design life. Flexible pavement design and comparison of alternative. Pdf design of rigid pavement by irc method and its critical. Pdf design of rigid pavement by irc method and its. Section 4 flexible pavement construction standard specification for urban infrastructure works 48 edition 1, revision 02 oct 2010 test method description base material requirements dgb20 gmb20 ngb202c 2d as 1289. Rigid pavement as per irc 582002 rigid pavements are generally used in constructing airports and major highways, such as those in the interstate highway system. The reliability of the pavement design performance process is the probability that a pavement section designed using the process will perform satisfactorily over the traffic and environmental conditions for the design period aashto, 1993 1. G student 2professor 3assistant professor 1,2,3department of civil engineering 1,2,3samrat ashok technological institute, vidisha m. A typical flexible pavement section is shown in figure 1. The empirical design method for flexible pavement, proposed in 1970, was continued. Aashto method of flexible pavement design road surface. Before we differentiate between flexible pavements and rigid pavements, it is better to first know about them. Pavement design is governed by a number of considerationsfactors, as given below.
Design of rigid pavement by irc method and its critical. The earlier code is empirical in nature which has limitations regarding applicability and extrapolation. The main design factors are stresses due to traffic load and temperature variations. Design the length and spacing of tie bars given that the pavement thickness is 20cm and width of the road is 7m with one longitudinal joint. For the love of physics walter lewin may 16, 2011 duration. Pdf flexible pavement design in india sanjay garg academia. Recommended practice for open graded premix carpets third revision recommended practice for open graded premix carpets third revision nonbituminous base and subbase. Flexible pavement aspects of basic design as per irc method. Rajib basu mallick methods of design of flexible pavement empirical method. Flexible pavement presentation linkedin slideshare. Flexible pavement design by cbr method is used to determine the total thickness of pavement.
Thickness of pavement the thickness of highway pavement h. Rigid pavementrigid pavement 20 deflection is very small hence the name rigid pavement. Example 2 given in paragraph 7 illustrates the design procedure for. The file extension pdf and ranks to the documents category. Aashto method of flexible pavement design road surface road.
Design the pavement for construction of a new two lane carriageway for design life 15 years using irc method. Flexible pavement design by california bearing ratio method. Chapter 14 irc method of design of exible pavements. Comparative studies of flexible and rigid pavement design. Design, construction and maintenance of flexible pavements. Systems approach to the flexible pavement design problem. The objective of this method of design is, to design the pavement structure to control rut. Hence, a fully acceptable, theoretical method of design has not emerged as yet, and the. The california bearing ratio cbr test is an empirical method of design of flexible pavement design. The various layers composing a flexible pavement and the functions they perform are described below. Design period or design life of a pavement is the period of time for which the initially. Mar 23, 2020 pavement has been designed for period of 20 years, using irc 37. The common design method for flexible pavement are the aashto method, asphalt institute and two layer system.
The high flexural strength is predominant and the subgrade strength does not have much importance as in case of flexible pavement. Pavement design with examples complete data civildigital. This design manual addresses methods to properly develop a rehabilitation project, pavement milling, and the computations necessary for the pavement design process. Tentative guildelines for the design of flexible pavements author. The present study applied the aashto and pca method for design of rigid pavements, for both pavement types using 20 year design life and 5% annual growth rate. Rajib chattaraj superintending engineer public works directorate 7th september2019 govt. Flexible pavement design subcommittee personnel given below, set up.
Aasho method that will have passed over the pavement in one direction at any time, t. Difference between flexible and rigid pavements is based on the manner in which the loads are distributed to the subgrade. Step by step free download as powerpoint presentation. From the data obtained, flexible pavement will be designed with the help of guidelines mentioned in irc. Flexible pavements in india are designed based on california bearing ratio cbr of subgrade soil and expected number of cumulated axles measured in million standard axles, msa during the design life of the pavement. Can use load spectra instead of esals computationally intensive. To design the road stretch as a flexible pavement by using different flexible methods like group index method, c. Flexible pavement design procedures pavement managers workshop august 68, 1985 index chapter flexible pavement design procedures flexible pavement design system texas triaxial design procedures swelling clays in the fps system the fps traffic equation page 1 5 88 92 100 appendix a test method tex 117e. Irc 372001 guidelines for the design of flexible pavements click here to download the guidelines on design of flexible pavement were first brought out in 1970, which were based on california bearing ratio cbr of subgrade and traffic in terms of number of commercial vehicles more than 3 tonnes laden weight. Introduction to flexible pavement design ced engineering. Irc method of design of flexible pavement 1 slideshare. Indian roads congress has specified the design procedures for flexible pavements based on cbr values. It is a load test applied to the surface and used in soil investigations as an aid to the design of pavements.
Pavement is a structure engineered to carry vehicular loading. Fps 21 should be used as a check for all flexible designs as described in pavement design process. Nov 25, 2014 irc 372001 guidelines for the design of flexible pavements click here to download the guidelines on design of flexible pavement were first brought out in 1970, which were based on california bearing ratio cbr of subgrade and traffic in terms of number of commercial vehicles more than 3 tonnes laden weight. Goliya, journalinternational journal for scientific research and development, year2015, volume3. Feb 28, 2018 irc method of design of flexible pavement 1 1. Aastho flexible pavement design method objectives know the factors considered in the aashto design method become familiar with use of tables 20. Lecture series on introduction to transportation engineering by prof. Jul 26, 2016 there is document ircsp722007 guidelines for the design of flexible pavements for low volume rural roads available here for reading and downloading. A detailed study of cbr method for flexible pavement design. Irc method of design of exible pavements chapter 14 irc method of design of exible pavements 14. Pavement design by cbr method recommended by california state of highways and irc are explained. Design of flexible pavement using aashto method duration. Design of pavements has been based on experience and judgment in the past.
Use the download button below or simple online reader. Irc 372001 guidelines for the design of flexible pavements. Paul guyer is a registered civil engineer, mechanical engineer, fire protection engineer, and architect with over 35 years experience in the design of buildings and related. In other words, there must be some assurance that a pavement will perform as intended given. The pavement designs given in the previous edition irc. Dec 03, 2017 for the love of physics walter lewin may 16, 2011 duration. Tra c tends to be more channelized on single roads than two lane roads and to allow for this concentration of wheel load repetitions, the design should be based on total number of commercial vehicles in both directions. A design example of flexible pavement n 50 msa projected traffic. A new four lane divided highway is to be constructed on a subgrade of cbr 1. The initial traffic in the year of completion in each direction is 150 cvpd and growth rate is 5%. The pavement has been modeled as a three layer structure and stresses and strains at critical locations have been computed using the linear elastic structural model fpave. Flexible pavement design given in the previous edition irc. The thickness of the various layers of flexible pavement are given in table i. Relevant design data where obtained from dar consult and technique cone.
Irc371984 guidelines for the design of flexible pavements. Cbr method for flexible pavement design, cbr stands for california bearing ratio, this method divided into two phases. Design, types, flexible and rigid pavement, notes and functions. Irc method of design of exible pavements single lane roads. The unit weight of concrete is 2400, the coefficient of friction is 1. In addition, they commonly serve as heavyduty industrial floor slabs, port and harbor yard pavements, and heavyvehicle park or terminal pavements. Two methods of flexible pavement structural design are common today. Flexible pavement aspects of basic design as per irc.
373 1029 717 342 116 1009 5 739 731 1226 1423 477 1384 1105 1341 209 1086 571 377 798 1493 1424 124 632 564 1017 1076 1113 660 989 1489 429 1126 732 285 210 99 799 1177