美国铁路联合公司对路基排水问题,采取了一些措施,包括定期进行排水检查、使用土工纤维布等。对路基排水的检查,在正线上,每周不少于3～4次。对于有怀疑的某些软弱路基,以往只能挖开路面才能确定是否存在问题,现试验了一种能确定地下状况的雷达装置,不需要挖开就能通过雷达直接找出路基内排水不良的处所。美国铁路还逐渐推广应用土 U.S. Railroad has taken some measures against roadbed drainage, including regular drainage checks and the use of geotextiles. Drainage on the subgrade check, on the main line, not less than 3 to 4 times per week. For some suspected weak subgrade, in the past can only dug the road surface to determine whether there is a problem, is to test a determination of the underground condition of the radar device, without digging can be directly through the radar to find poor subgrade drainage Premises U.S. Railways also gradually promote the use of soil