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US 4,451,180 AGranted
Method for restructuring railway roadbeds
OwnerHenry H. Duvalinventor
Life of this patent
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Abstract
A method for restructuring a railway roadbed by injecting therein an amount of structural slurry effective to form a substantially continuous structured layer which provides increased load carrying capacity to said roadbed, which substantially blocks the intrusion of water into the subgrade soil through the ballast section of said roadbed, and which limits the upward intrusion of subgrade soil into the ballast section.
Claims1
A method for restructuring a railway roadbed comprising the steps of:
- (a) removing ballast from beneath the rails and crossties of said roadbed;
- (b) admixing said ballast with a structural slurry;
- (c) depositing said admixture beneath the rails and crossties of said roadbed to form a structured layer;
- and thereafter
- (d) providing at least about 4 inches of ballast between said structured layer and said crossties.
2 more elements
Dependencies are inferred from the claim text.