The development and testing of a mobile drilling robot

63 A mobile drilling robot has been developed by TNO Building and Construction Research in cooperation with Dutch industries . This robot will be used for drilling holes for, among others, anchor bolts for fastening railway tracks to a concrete foundation or holes for starter bars. One of the design criteria was the high level of accuracy of the location of the holes: ±2 mm, which is extraordinary for a construction site. In this paper a comprehensive description of the drilling robot is presented, including the structure with its components and the control systems. Laboratory results and the on site tests in an underground railway station at Amsterdam airport are also presented.