The 1993 version of aashto guide for design of pavement structures is the basis for developing the modules. In the rigid pavement design, thickness of the concrete slab is calculated for the various types of rigid pavements. Unfortunately, this book cant be printed from the openbook. Wsdot pavement guide interactive cdrom 9 kips 9 kips. The aashtoodot pavement design equations have some variables common to both rigid and flexible pavement. Deen, assistant director of research, kentucky department of highways one significant means for evaluating the relative destructive. In addition to providing an analytical approach to structural pavement design, chapter 54 presents an analytical method for selecting the most economical pavement design that can be expected to meet structural design requirements. Standard specifications for road and bridge construction edition of 2008 approved for december 14, 2007 marcelyn mathews, p. Gott a statistical approach was used to characterize axle loads of heavy vehicles for use in highway pavement design and performance analysis. Pavement thickness must be designed to withstand the anticipated traffic, categorized by type and weight of vehicles, and measured by average daily volume adv of each type for the design life of the pavement. Pdf pavement analysis and design by yang h huang book.
Equivalent single axle loads alaska department of transportation. Esal is the acronym for equivalent single axle load. Estimation of axle loads of heavy vehicles for pavement studies t. State highway engineer copies of this publication may be obtained from. Use of the 1993 aashto guide, mepdg and historical. Fs f sf ford excursion dn f dn m s m sm mazda miata dn f dn. It is a single axle load with dual wheel carrying 80 kn load and the design of pavement is based on the standard axle load. Equivalent single axle load esal is a quantity that is related to pavement damage caused by a standard axle load of 80. Chapter ii pavement design chapter ii pavement design january 2005 1 chapter ii pavement design 1. The primary purpose of the comprehensive pavement design manual cpdm is to provide designers with a singlesource compilation of current department policy and guidance pertaining to pavement designs for projects falling under the jurisdiction of the nys department of transportation. With innovations ranging from the advent of superpave, the data generated by the long term pavement performance ltpp project, to the recent release of the mechanisticempirical pavement design guide developed under nchrp study 7a, the field of pavement engineering is experiencing significant. The cumulative number of standard axles to be catered for in the design life in.
Barrett during the design life of a project there are five activities completed by pavement design. Download pavement analysis and design by yang h huang the first edition of pavement analysis and design was published in 1993. For flexible pavement designs, fps19w texas flexible pavement design. Introduction to pavement design a highway pavement is a structure consisting of superimposed layers of processed. This guide presents examples of designs, procedures, and applications that have. Materials preliminary engineering and design manual. For most pavements, the magnitude of the axle load is of greater importance than the gross. Axle load distribution for mechanisticempirical pavement.
It must be noted, that more stresses are induced and hence increased damaging effects caused by an axle load higher than standard axle load 18000 lbs. While the standards contained in this manual provide a basis for uniform design practice for typical pavement design situations, precise rules which would apply to all possible situations are impossible to give. Nearly onethird or onehalf of the total cost of construction, so careful consideration should be taken in design of pavement. For highways the maximum legal axle load in india, specified by irc, is 10 tonnes. The design eals represent the equivalent num ber of applications of a standard or base axle load anticipated during the design. The traffic load distribution consists of the frequency distribution of axle group loads. A comprehensive, stateoftheart guide to pavement design and materials. Estimating cumulative traffic loads, volume ii, traffic data. When there is a torque equilibrium around the centre of the wheel, the following.
Types of road pavements a variety of materials may be applied for road pavement construction but generally two types of road pavements are used. Thus, 100 passes across a pavement by a 20,000pound axle would have the same effect on pavement life as 150 passes by an 18,000pound axle. It takes advantage of the advances in material mechanics, axleload spectra, and climate data for predicting pavement performance. The maximum allowed axle load on the roads is called legal axle load. Standard axle load single axle, dual wheels source. If you need to print pages from this book, we recommend downloading it as a pdf. Both standard and widebased tires have been considered. Design traffic esals esals is the estimate of number of equivalent 18 kip single axle loads esals during the analysis period is required. Dc to richmond road in 1919 from the asphalt institute. Standard axlestandard axle single axle with dual wheels carrying a load of 10. Pdf design and analysis of flexible pavement malik sarmad. Principles and practices in various design guidelines animesh das1 received. The deformation of pavement due to a single application of axle load may be small but due to repeated application of load there would be accumulation of unrecovered or.
Road pavement design guide 2 use of the design guide and pavement options this document is intended to cover the design of new schemes of any size and reconstruction or. Road pavement design guide home kent county council. Pavement design is the major component in the road construction. Determining cumulative esas over the pavement design life for pavement design purposes all heavy commercial vehicles are expressed in terms of the equivalent number of standard axles that they represent. In undoweled pavements, load transfer is provided by aggregate interlock. Estimation of axle loads of heavy vehicles for pavement. Axle load calculations general information about axle load calculations 04. Quality asphalt pavement may be constructed in a wide range of soil, weather, and loading conditions. Until reliable data is available, the following distribution may be assumed.
Deacon, assistant professor of civil engineering, university of kentucky. Example spring 2007 cee 320 pavement purpose load support smoothness drainage spring 2007. Based on axle load studies previously undertaken in bangladesh, the following. Nanjundaswamy professor of civil engineering department of civil engineering 2015. The major change is how the details of the traffic load distribution tld are used as design inputs. Aggregate interlock is lost when slabs contract and the joints open up. Transportation cabinet office of personnel management policy support branch 200 mero street, 6th floor west frankfort, kentucky 40622 502 5644610. Equivalent single axle load although it is not too difficult to determine a wheel or an axle load for an individual vehicle, it becomes quite complicated to determine the number and types of wheel axle loads that a particular pavement will be subject to over its design life. The wide spread adoption of this book by so many colleges as an undergraduate or graduate text has encouraged the author to write this second edition. The pavement designs are given for subgrade cbr values ranging from 2% to.
Technical circular pavement structure design guidelines 2 table of contents 1. For hogging moment between inflection points, 90% of the effect of 2 nos. On the basis of actual axle loads of 12,638 vehicles. Review of truck characteristics as factors in roadway design. Implementation of the aashto pavement design procedures. Benkelman beam truck standard type roadway designation 20 year design esal. Pavement design manual section 1 introduction page 1 1 introduction 1. This article presents the 1993 aashto guide basic design equation for flexible pavements. Pavement design is primarily a matter of sound application of acceptable engineering criteria and standards. Obtain traffic data in the project development process manual.
Furthermore, it is important to note that the mechanistic empirical pavement design guide mepdg defi ned the use of axle load spectra to represent the vehicle loads in pavement design2, 3. While this software does not address all of the challenges to pavement design, it is a quantum leap forward from previous pavement design procedures and facilitates future development in pavement modeling and analysis. The austroads pavement structural design guide has undergone a major revision that was released in december 2017. Pavement design in road construction design parameters. Accumulates damage contributed by each axle load in the traffic spectrum at each analysis point cumulative damage factor cdf is the sum of damage factors over all the loadings pavement reaches its design life when cdf 1. Thickness design on flexible pavement aashto 1993 method.
Key words axle load spectra, weighinmotion, mechanisticempirical pavement design, traffic forecasting 18. Since the current tables inception in 1992, changes in materials, mix. Design lifedesign life to achieve a design of low life cycle cost and in respect of the high social cost for full depth reconstruction, the design life for rigid pavement is generally. All activities, except the verification, are forwarded to the district engineer for concurrence. When the system is not moving, the sum of all forces and torques equals 0. Axle load analysis for bituminous pavement design youtube. Design data hand book geometric design and pavement design compiled by dr. For divided carriageways, each direction may have different thickness of pavements if the axle load patterns are significantly different. The guidance provided reflects the collective experience of the department of transportation, the. This 2016 asphalt pavement design guide has been prepared to assist readers in understanding asphalt mix pavement design, construction, and rehabilitation.
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