Construction of a 9700m, 180cm diameter effluent pipeline required tunnelling from an existing sewage treatment plant to a barrier island outfall structure. Construction of the tunnel required a launching shaft at the plant and a receiving shaft at the barrier island. Artificial ground freezing was specified as the method to provide temporary earth support and groundwater control at the launching shaft and selected by the contractor for the receiving shaft.
Read MoreNo. 7 Line Extension Project
Ground freezing was chosen to safely maintain stability, restrict groundwater inflow and limit settlement of the overlying structures to support hand-mining excavation.
Read MoreBoston Central Artery Tunnel
Ground freezing enabled the jacking of three massive tunnels just beneath seven active Amtrak lines serving Boston’s South Station and the financial district.
Read More2nd Avenue Subway Project
Ground freezing was selected to provide ground stabilization and water cut-off for the 2nd Avenue Subway expansion project. The use of ground freezing permitted safe mining operations with the TBM.
Read MoreFukushima’s Ice Wall
Listen to the CBC Radio’s interview with Joe Sopko about ground freezing as it applies to containing groundwater surrounding the Fukushima nuclear plant…
Read MoreNo. 7 Line Tail Tunnel Freeze
The South Tail Tunnel of the No. 7 Subway Line in NYC recently required ground freezing and permeation grouting to provide ground stabilization and groundwater cutoff.
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