US 12,448,738 B2
System and method for subgrade stabilization of railroad bed
Tomasz Szynakiewicz, Golden, CO (US); Justin Anderson, Lexington, KY (US); and Robert W. Hollinger, Arvada, CO (US)
Assigned to SOIL-NAIL HOLDINGS, LLC, Commerce City, CO (US)
Filed by R & B Leasing, LLC, Grand Junction, CO (US)
Filed on Aug. 16, 2021, as Appl. No. 17/402,887.
Application 17/402,887 is a continuation of application No. 15/902,888, filed on Feb. 22, 2018, granted, now 11,118,315.
Prior Publication US 2021/0372055 A1, Dec. 2, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. E01B 27/10 (2006.01); E01B 1/00 (2006.01); E01B 2/00 (2006.01); E01B 37/00 (2006.01)
CPC E01B 27/102 (2013.01) [E01B 1/001 (2013.01); E01B 2/006 (2013.01); E01B 37/00 (2013.01); E01B 2204/03 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A system for repairing a rail bed underlying a railroad having rails and cross ties, the system comprising:
a rail mounted motor vehicle;
a drill mast assembly mounted on the motor vehicle, the drill mast assembly having a drill mast frame that supports at least one drill mast;
a drill mounted on said at least one drill mast, said drill having a drill head;
a hydraulic lift secured to said drill mast assembly to raise and lower said drill mast assembly wherein the hydraulic lift rotates the drill mast assembly between a first horizontal stowed position to a second vertical operating position;
a power source for powering the drill to selectively penetrate the rail bed;
a pump;
a grout source wherein the pump operates to transfer the grout through a transfer line to the drill mast assembly; and
wherein the drill head is lowered to drill holes in the rail bed while the drill mast assembly is in the second vertical operating position and to inject the grout into the rail bed; and
wherein the motor vehicle has wheels enabling the motor vehicle to be driven off and driven onto the rails.