| 摘要 |
In a concrete railway rail foundation (200; 250; 260), on which anchoring devices (4; 45) for retaining railway rail fastening clips (3) are to be located when the foundation (200; 250; 260) is in use, the face of the foundation (200; 250; 260) which is to be uppermost when the foundation (200; 250; 260) is in use has a rail seat area (202; 252; 262) for supporting a railway rail (1) extending in a first direction across the rail seat area (202; 252; 262), two anchoring device seating regions located on either side of the rail seat area (202; 252; 262) for accommodating respective anchoring devices (4; 45) to be located on the foundation (200; 250; 260), and, on each side of each anchoring device seating region, an upstanding portion (201; 251; 261) having a height substantially the same as or higher than that of an anchoring device (4; 45) to be located on the foundation (200; 250; 260) and a depth, in a second direction substantially perpendicular to the first direction, which is substantially the same as or deeper than that of the said anchoring device (4; 45). An electrical insulator (500) for location between a foot of a railway rail (1) and an adjacent anchoring device (4; 45), for use with such a foundation (200; 250;2560), has a reaction face (501) which is wider than the face (41, -46) of the anchoring device (4; 45) against which it is to abut. |
