In 4.1.0 Right of Way I discussed how a railroad company got the land that it operates on. In 4.1.1 Roadway Roadway is planned and constructed based on the roadway engineering plan. The plan identifies all the issues involving construction, to include:
1) Geography: that is the roadbed, embankment, cuts and fills, drainage, and
2) Track structure: Ballast, Ties, Rails, Turnouts, Track crossings (Special works), and other associated materials.
In this page we will discuss the geographic issues in roadbed engineering and construction, specifically cuts and fill.
Prototype Information
Definition
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| Cut (Excavation) |
Fill. A railroad right-of-way formed by raising and leveling a low area or a depression to keep the ruling grade manageable. Fills are usually small, utilizing rock or dirt removed from other areas of the right of way. Larger fill requirements are met by the construction of culverts, embankment and bridges. See 4.1.1.2 Embankments for additional details.
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| Union Pacific Slope Ratios |
Excavation slopes. The Union Pacific has listed four generic excavation slopes ratios based on the predominant slope materiel:
- 0.5:1 for solid rock
- 1:1 for fractured rock
- 2:1 for common materiel
- 3:1 for sand
The WWSL
The WWSL has examples of cut and fill engineering locations at Smith Canal, Preachers Slough, Polson Canyon and Satsop River Stations.
Reference
UP Double Track Common Standard
UP Rip Rap Protection Common Standard
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