Road pavement testing apparatus.

摘要

A road testing apparatus has a framework (10) extending over a test portion (23A) of road pavement and has tracks (13, 14 and 15) with upwardly curved ends along which wheels (17, 18 and 19) of a trolley unit (16) roll, so that the trolley unit decelerates as it approaches an end position to cause kinetic energy to be transformed into potential energy and when return motion trolley commences the potential energy transforms back to kinetic energy. The trolley unit (16) has a pivotally mounted base structure (27) carrying a test load (43) and a pair of road wheels (23) which are mounted so as to be steered by the trolley as it progresses in a forward direction along the test pavement, additional wheels (19) of the trolley running up an end portion of the track to lift the road wheels off the road surface as the end position is reached. A telescopic linkage (51) latches into engagement at this end position to retain the road wheels in an elevated position relative to the trolley so that, during return motion, the road wheels can continue to rotate in the same direction but engage on the bottom of a base plate (25) structure of the framework to drive the trolley in the reverse direction, the latch arrangement (66, 67) being released when the trolley reaches the opposite end position to permit a further cycle of operations.