Use of accelerometers to measure displacement. (Studies of the resiliant support to the rail) (TN-TAS-016)

In the course of some measurement of Ballast Stiffness in July 1963, it was noted that the existing technique had several disadvantages. 1 : 1 This technique involved driving 4 ft. long piles (which were fitted with outer protective sleeves) through, ballast between the sleeper ends and into the...