scope:

Introduction

This Track Work Instruction covers what is involved in the repair of fastenings in concrete sleepers, bearers - or on slab track.

These types of repair were pioneered on the now obsolete BJB fastening. The BJB fastening was held in the concrete using a beech wood plug. When the plug started to disintegrate the fastening became loose. The remedy was to core out the old housing, apply epoxy grout to the hole and insert a new Pandrol housing.

The method can only be applied to fastenings which have a single point fixing in the concrete. It is not suitable for multiple fixing point fastenings such as the SHC.

The repair technique is now routine for failed Pandrol housings.

See also separate instructions:

TWI 3C031 How to assess and manage the life of a concrete sleeper

TWI 3C034 How to manage concrete sleepered track