Concrete Society TR 34 Method - This follows the Meyerhof plastic design method and is used for internal industrial pavements.Continuously Reinforced Concrete Pavement Design - This is based on TRL 630 which is the standard design method for continuously reinforced concrete pavements in the UK.PCA Method - This early mechanistic design method is still in common use and forms the basis of many countries standards such as Australia.AASHTO Rigid Pavement Design Method - This is the standard method for concrete road design in the US and many other countries around the world.UK TRL 87 Method - This is the standard design method for concrete road design in the UK.The CivilWeb Pavement Design Excel Spreadsheet Suite includes the full CivilWeb Rigid Pavement Design suite which includes 11 different concrete pavement design methods, including the following This ultimate spreadsheet bundle can be purchased at the bottom of this page for only £30. The CivilWeb Spreadsheet includes £170 worth of advanced design spreadsheets. The CivilWeb Pavement Design Excel Spreadsheet Suite includes 6 different methods of flexible road design and 11 different methods of concrete pavement design. This suite includes both the full Flexible Pavement Design Suite and the full Rigid Pavement Design Suite. Both vehicles had the same tire pressures: 110 psi for the two front tires and 95 psi for the eight rear tires.The CivilWeb Pavement Design Excel Spreadsheet Suite is the ultimate collection of pavement design spreadsheets. The City has two non-standard 3-axle, 10-wheel vehicles that I was to use for design, so I asked my counterpart at the City to give me actual loaded vehicle weights and tire pressures. Last year, I designed some concrete pavements for a city's corporation yard. However, if you're looking for maximum pressure, a good approximation is the actual tire pressure. This generates average pressures of 40 psi, 80 psi, and 26 psi. The AASHTO tire contact areas for these wheels are 10 in x 10 in, 20 in x 10 in, and 20 in x 48 in, respectively (the last two include the spaces between the tires). For example, an AASHTO HL-93 design vehicle has the following loads: 4,000 lbf for a single front wheel, 16,000 lbf for a dual rear wheel set (=8,000 lbf per wheel), and 25,000 lbf for dual/tandem wheel set (=6,250 lbf per wheel). It is possible to take an axle load and convert it to a pressure, just not multiples of the axle load. I built the first version of this spreadsheet in 1986 using SuperCalc 4. If you want to see how all this is done, I have attached my AC pavement design spreadsheet template for your and anyone else's use. You can download these two documents (and other chapters) from the Caltrans website. Flexible pavement design is covered in Chapter 630. The 10-year ESAL constants are one-half of these values.Ī detailed explanation of the use of ESALs within the calculation for the Traffic Index is found in the Caltrans Highway Design Manual, Chapter 610. Thus, the ESAL is used as part of calculating a long-term cyclical loading, rather than an instantaneous pressure. Each type of design vehicle (all trucks, from 2 axles to 5+ axles) has a long-term "ESAL Constant" that is based on the equivalent single axle load (ESAL) of the vehicle and the design life of the pavement (typically 10 or 20 years, but can be longer). For portland cement concrete pavements, I have used Caltrans and ACI 360R-14.Ĭaltrans uses a "Traffic Index" to determine the long-term traffic loading on a pavement for design purposes. I have done a few AASHTO designs, but it's been a while. I base most of my asphalt concrete pavement designs on the Caltrans Highway Design Manual.
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