MixOnSite has successfully used Geofill cellular concrete to solve a variety of tunnel backfill grouting challenges. Geofill's unique set of characteristics makes it an ideal choice for either wet or dry tunnels, as well as critical path projects or jobs where access to injection points is limited.
Geofill LD and Geofill LD Hybrid offers several advantages for tunnel backfill grouting applications, including:
Mix designs can be customized to project requirements such as void size as well as ground conditions.
Lightweight nature of the material will reduce the possibility of pipe floatation or buckling in comparison to heavier conventional grouts and concretes.
Flowable and pumpable, Geofill LD ensures complete filling of the tunnel at low pumping pressures that are easily maintained.
Low density cellular concrete backfill is energy absorbent and will protect finished tunnels from ground movement.
MixOnSite utilizes state of the art equipment that is capable of batching and pumping Geofill LD cellular concrete at rates of over 100 cubic yards per hour at distances of more than one mile. Material density is monitored at the plant and inside the tunnel at the point of injection.
Lurie Medical Center Chicago, IL
Load Reducing Backfill
This project required backfilling narrow areas up to 45’ deep between the new foundation and the sheet piles. Granular backfill would have required compaction which was logistically impossible, while flowable fill or CDF would exert too much load on the foundation wall.
Geofill Hybrid (70 PCF) reduced the lateral load against the foundation and eliminated hydrostatic pressure by being impermeable. The flowability of the material resulted in minimal disruption to the site.
