Moretrench used artificial ground freezing toprovide ground support and groundwater controlprotection at five shaft locations in midtown Manhattan.
Read MorePatent – Groundfreezing installation accommodating thermal contraction of metal feed pipes
Patent 7,438,501: This invention provides a solution to the problem of feed pipe thermal contraction in a ground freezing system…the feed pipe is constructed of metal, preferably steel, so that its thermal contraction is much reduced compared to HDPE pipes.
Read MorePatent – Method and apparatus for artificial ground freezing
Patent 6,796,139: This invention encompasses a method and apparatus for ground freezing that makes use of cooling techniques resulting in circulating fluid temperature of -50°C (-58°F) or less. This has the great advantage of allowing the freeze pipes to be spaced relatively far apart while still creating an impermeable frozen earth barrier in a reasonable period of time.
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.
Read MoreRecovery of Tunnel Boring Machine
Ground freezing, using liquid nitrogen to create a strong watertight frozen earth envelopes around a Tunnel Boring Machine…
Read MoreNS-10 Junction Chamber
A frozen earth cofferdam was formed for the construction of a sewer junction chamber. Ground freezing provided a watertight connection between tunnel and junction chamber and also a safe watertight connection between the junction chamber and river crossing tunnel…
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