Rails Layout

What are rail layout steps for the bridge girder launching gantry?

FAQ Jul 26, 2012 Comments Off on What are rail layout steps for the bridge girder launching gantry?

Lay rails of the bridge girder launcher (suggest P43 or P43 rails above)

lateral sliding rail of the bridge girder launching gantry

lateral sliding rail of the bridge girder launching gantry

1. Lateral sliding rail layout

2. It is unnecessary to lay longitudinal sliding rail for the bridge girder launcher, it is needed to lay lateral sliding rails for front and middle support legs, sleeper layout should be stable and reliable, use spike to fix outside rail on the sleeper, inside use spikes to buckle symmetrically with edges of two rails; cushion block is used between rail connections, outside is connected by rail splint and long bolt.

3. Lay trolley rail on the bridge girder launcher

4. Rails are directly fixed on the main longitudinal girder, rail connections are connected firmly by rail splint, set up limit switch and rail stop iron at both ends of rail.

5. Rail layout above demands smooth rail joint, correct rail distance, solid support. Distance and size should be strictly controlled to be paralleled between two lateral rails (front, middle support legs) (see table below)

Table??????? Rail Layout Requirements

No

Item

New layout

In service

1

rail top height difference at same section ?25mm ?40mm

2

track gauge difference of the bridge girder launcher ?5mm ?6mm

3

rail longitudinal gradient ?3? ?3.6?

4

Rail straightness?in 2 meters distance? ?1mm ?1.5mm

5

Height and lateral deviation at rail joints ?1mm ?1mm

6

Interval at rail joints ?20??rail length 12.5m?   ?2mm

 

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