Control of the thickness of binder penetration on long runs can be performed by GPR, which is well-established in the studies of railways (Annan, 2003, Vorobyov et al., 2011). However, direct GPR measurement of the thickness of the GeoComposite formed, when the pores are not filled with ...
Experimental, Theoretical or Mathematical/ acceleration measurementdampingdynamic testingelasticityrailwaysvibrations/ railway ballast vibrations modellingrailway track geometry changetrack maintenance costsgranular ballast vibration testingfive-parameter modelThe vibration of railway ballast is a key factor to cause ...
A method and apparatus for spreading ballast along railways makes use of an inertial measurement system to determine where to apply ballast from a hopper car. A variety of techniques can be used to determine the location and speed of the... ...
In-Motion Railroad Tie Deflection Measurement via Ultrasonic Airborne Sonar and Computer Vision Techniques It is known in the railroad maintenance engineering community that the deflection of railroad ties is an indicator of the quality of the tie-ballast interf... AZ Hosseinzadeh,D Datta,FLD Scale...
The ancient railways in France, which was initially built by emplacing ballasts directly on the subgrade soils without a separation layer as that for new railway lines, are facing to various problems that affect the stability of trackbed and thus the proper circulation of trains. One of these ...
Domenica Cambio, and Louis Ge (2007) "EFFECTS OF PARALLEL GRADATION ON STRENGTH PROPERTIES OF BALLAST MATERIALS" Advances in Measurement and Modeling of Soil Behavior (GSP 173) 236, 14CAMBIO, D., GE, L. Effects of Parallel Gradation on Strength Properties of Ballast Materials. Advances in ...
With the application of a simple geometrical model for a ballast structure good agreement between measurement and calculation could be achieved. The model was validated for a large set of loudspeaker measurements conducted at the occasion of the development work of sonRAIL, the new Swiss railway ...
To verify the computational method, two full-scale measurement programmes were carried out on the Swedish West Coast Line in 1993 and 1995. Track parameters are determined by use of measured frequency response functions. Measured and calculated frequency response functions show acceptable agreement. ...
Methods and apparatus for implementing ballast to a bed of a railroad track and to supervise a bed of a railroad, a method and apparatus for spreading ballast along railways makes use of an inertial measurement system to determine where to apply for a ballast hopper car.A variety of ...
The results of the FWD measurements indicate that a good increase in overall track stiffness was measured. These results are consistent with the laboratory tests which are performed on a different soil and use a different measurement technique and hence confirm that regardless of the soil and ...