JT/T 120-2008 Translated English of Chinese Standard (JTT120-2008): Benkelman beam pavement deflectometer [Buy--download True-PDF in 3-second: https://play.google.com/books > Sign in > This BOOK > "3-dots" > Export > Save as "*.pdf"]This standard specifies the product model, structure, technical requirements, testing methods, inspection rules, marking, packaging, transportation, storage of the Benkelman beam pavement deflectometer. For the Benkelman beam pavement deflectometer, which is specified in this standard, it is suitable for testing the total deflection or rebound deflection, deflection basin, modulus of deflection of the subgrade, base layer, pavement of the flexible pavement structure and semi-rigid pavement structure, of different levels. It is also suitable for testing the load transfer capacity between rigid pavement slabs. |
Common terms and phrases
2N weight adjusting bolt beam pavement deflectometer Benkelman beam pavement bubble deflectometer is divided dial indicator frame Dial indicator holder Effective length error and leverage error of measurement exit-factory inspection front and rear front end front lever gauge block greater than 0.1 hang a 2N horizontal distance indicator AND 1/2 indicator end indicator to zero inspection rules instruments and appliances leverage ratio error Lifting support platform load transfer matching diameter maximum allowable error measure the horizontal measurement lever measuring rod's hole meet the requirements millimeters parameters of Benkelman perpendicularly projected Place the dial probe's dial indicator Put the beam rear beam support Record the reading requirements of Table results shall meet ruler to measure Schematic diagram selected according Set the indicator shown in Figure Steel ruler structural steels GB/T subgrade suitable for testing Support's centre Test method Testing of transverse testing steps top surface type inspection Vernier caliper Vertical deflection