US 12,123,149 B2
Geoengineering constructions for use in railways
Mike Horton, Dunblane (GB)
Assigned to TENSAR TECHNOLOGIES LIMITED, Blackburn (GB)
Appl. No. 16/647,143
Filed by Tensar Technologies Limited, Blackburn (GB)
PCT Filed Sep. 14, 2018, PCT No. PCT/GB2018/052629
§ 371(c)(1), (2) Date Mar. 13, 2020,
PCT Pub. No. WO2019/053454, PCT Pub. Date Mar. 21, 2019.
Claims priority of application No. 1714867 (GB), filed on Sep. 15, 2017.
Prior Publication US 2021/0180262 A1, Jun. 17, 2021
Int. Cl. E01B 1/00 (2006.01); E01B 2/00 (2006.01); E01B 26/00 (2006.01); E01B 27/02 (2006.01)
CPC E01B 26/00 (2013.01) [E01B 1/001 (2013.01); E01B 2/006 (2013.01); E01B 27/02 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A geogrid engineering construction for railways, the construction comprising:
a track bed which defines a track located on a track plane;
a particulate layer lying beneath the track plane; and
a geogrid located in and/or adjacent to the particulate layer,
where the geogrid is located in a geogrid plane substantially parallel to the track plane such that the geogrid stabilizes the particulate layer such that the properties of the particulate layer satisfy Equation 4A;

OG Complex Work Unit Math
where
A is a dimensionless constant;
B is a dimensionless constant;
υ denotes the Poisson ratio of the particulate layer;
G0 is the small strain stiffness property of the particulate layer; and
ρ is density of the particulate layer.