Railroad Subgrade Stabilization
Loss of soil strength is a major cause of railroad subgrade instability. Increased traffic, volumes and speeds, unstable fill over soft areas, water trapped in ballast pockets, cross-tie mud pumping, subgrade squeezing, deep shear failures, and poor drainage can cause track misalignment.
Cement/Slag injection stabilizes railroad subgrades composed of fine grained soils, including expansive clays and water-sensitive sites, by filling cracks, weakness planes, voids and ballast pockets, resulting in slope stability, less time between maintenance cycles, and higher train speeds. In addition to cement stabilization, compaction grouting techniques are employed to fill underlying voids, forms grout barriers along rock/soil interfaces, and densifies loose overburden soils. Hayward Baker has experience with the full range of railroad subgrade stabilization techniques to provide effective pre-construction or remedial stabilization for railroad projects.