GeoPrac.net Premier sponsor Moretrench would like to announce two upcoming events in the ASCE North Jersey Branch Geotechnical Group:
Ground Freezing Challenges for Horizontal Connection Between Shafts Under Difficult Geologic and Hydrostatic Conditions
by Mr. Kenneth E. Wigg, P.E., Senior Engineer with Moretrench American Corporation, Rockaway, New Jersey
Thursday, February 11, 2010 at The Newark Club, One Newark Plaza, Newark, New Jersey.
Ground freezing to assist in horizontal tunneling presents unusual challenges to the ground freezing design-build contractor. Stresses on the frozen ground vary with depth and the strength and water tightness of the interface between the frozen ground and existing structures is critical. For the East Side CSO Tunnel project, in Portland, Oregon a hand-mined tunnel was completed between two existing concrete slurry wall shafts at 42.7m (140ft) below ground surface. This presentation discusses the design, installation and operation of the ground freezing system, together with QA/QC measures employed to ensure full closure and maintain structural competency of the frozen ground during the tunneling activities.
Design and Installation of Micropiles and Drilled Shafts
in Association with ADSC Northeast Chapter
Thursday, March 25, 2010 at Stevens Institute of Technology, Hoboken, New Jersey.
This full day seminar will cover general and special topics relating to the design and construction of micropiles and drilled shafts. Topics will include micropile design techniques and structural considerations, case histories of difficult micropile installations and the use of hollow bar micropiles.