A new Concrete Tie design Created by Rudy Niederer

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29 Νοε 2013 (πριν από 3 χρόνια και 11 μήνες)

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A new Concrete Tie design

Created by Rudy Niederer

The Rudy Niederer (RN)
Breasted Concrete Tie
Design

This is a new concrete rail tie
design to create a better and
stronger roadbed for the trains.


This tie design does increase the
soles area and therefore reduce the
loading in to the ballast.


This design also reduce the amount
of concrete needed per mile since
the tie spacing will be further apart.


The spacing of the CXT tie is 24”
from center to center.


The spacing of the RN tie is 28”
from center to center.


The unsupported area of rail
between the ties remains 13” due
to the increases of the sole area,
utilizing the new RN design.

The RN Concrete Tie (Sleeper) Design Concept



The intent for this new RN pre
-
stressed concrete tie is to create a better tie or sleeper.

The benefits are:



Less tie concrete consumption per mile.



Less ties per mile


2640 ties @ current design versa 2262 @ RN ties.



Less compression psi exerted to the ballast due to the larger sole area. This equals 62.38 psi @
the current design and 55.82 psi @ the R.N. design. The calculated load is @ a 35 ton axle load in
this example. Breakdown = 140 ton rail car = 35 tons per axle or 17.5 tons per wheel. This is
heavy freight


HSR trains will be off less weight per axle.



Less rolling resistance for the traversing trains, thus reducing fuel consumption and polluting
emissions.



Lower maintenance cost

due to reduced

ballast crushing

and increased stability of the track
geometry.



Reduction of

closed lines due to re
-
ballasting or other rail alignment corrections.



Greater stiffness due to quad clipping (Tie to Rail Fasteners)



Greater side movement resistance; this is due to the breasting configuration in the tie design
creating a bulwark in the ballast.



Greater resistance to temperature changes (Thermal Coefficient). This design will keep the
alignment accurate for a longer period of time.



Increase the overall safety in the entire RN tie corridor due to the better tie, thus reducing
possible derailments, injury, property damage and possible law suits.



Increase overall economic benefits for the railroads and the society in
general.



Top view of the Breasted Tie
versus the standard CXT

Top view of the Breasted Tie

with tendons to produce the pre
-
stressed concrete

Tie spacing comparison between
standard CXT and the breasted Tie