Frozen ground for building support―implementation of innovative engineering concepts for tunneling at Russia Wharf

摘要

It is often the owner who starts investigation into innovative construction techniques to gain better solutions for given underground needs, in particular in complex urban settings. In other cases the process may be contractor driven to produce a more competitive bid or offer a value engineering solution. Independent of the initiative, for a successful implementation of innovative techniques a mechanism has to be in place that involves all parties and leads to their agreement to a proposed solution. At Massachusetts Bay Transportation Authority's South Boston Piers Transit-way Section CC03A such a process led to implementation of an innovative tunneling scheme which relies on the use of groundfreezing for temporary building underpinning and shotcrete for tunnel support.