A Case Study: Two-fluid Jet Grouting for Tunneling Application - Soil stabilization and Permeability Reduction

Abstract

The York Durham Sewage System (YDSS) Interceptor Sewer construction spanned a total length of 5.5 km, which included a 1.4 km stretch of open cut construction and tunnelled stretch of 4.1 km, with four access shafts. Two of the tunnel access shafts were located in an environmentally sensitive area with water bearing cohesionless soils and considered as a potential geotechnical hazard for tunnel break-ins/break-outs. A combination of slurry wall and jet grouting was used to stabilize the ground and control groundwater flow at shafts #2 and #3, during break-in/break-out of the tunnel boring machine (TBM). This paper presents a case study, addressing the application of double fluid jet grouting technique to mitigate a significant geotechnical hazard at shafts #2 and #3 for the YDSS Interceptor Sewer Project.

Theoretical and Experimental Analysis of Group Piles of Jet and Concrete Columns using the Double Grouting Technique Subjected to Axial Loading on Sandy Soil

“…The design was supported by the FE software PLAXIS. Authors in [11] explored the usage of the double jet grouting technique to stabilize cohesionless soils for the York Durham Sewage System along with a slurry wall. It was found that the unconfined compressive strength ranged from 4.6 to 9.7 MPa after 28 days.…”