COMPRESSIBLE GROUP MIX FOR USE IN ABSORBING COMPRESSIVE OR DEFORMATION STRESSES

• Main Author: DIMILLO, TONY
• Format: Patent
• Language: English; French
• Published: 08.02.2019
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MINING; SHAFTS; TUNNELS

The present invention relates to a compressible grout mix for use as a fill in applications requiring absorption of compressive or deformation stresses between subterranean formations and subterranean structures as well as a method of filling a gap between subterranean formations and subterranean structures in a subterranean formation subject to compressive or deformation stresses utilizing the compressible grout mix for resilient absorption of forces in the hardened state of the compressible grout mix exerted by the time dependent deformation of the rock wall surface into the tunnel opening. The compressible grout mix contains hydraulic binding agent, polymer foam particles, anti-wash agent, and water and the method includes: a. providing the compressible grout mix containing hydraulic binding agent, polymer foam particles, anti-wash agent, and water, b. placing the compressible grout mix in the gap between the subterranean formation and the subterranean structure, and c. allowing the compressible grout mix to set, wherein the compressible grout mix in the hardened state has a compressible ratio greater than the anticipated compressive and deformation stresses of the subterranean formation.