DUKE GEOLOGICAL LABORATORY

Geological Constraints on TBM Penetration on Hard Rock Tunneling, NYC

Tuesday, 23 November 2010; 5:30 PM
ASCE Metropolitan Section Lecture Series
CUNY Graduate Center
365 Fifth Avenue (@34th St.)
New York, NY 10016
Free Admission and Refreshments

Professor Charles Merguerian of Hofstra’s Geology Department and Duke Geological Laboratory will offer a lecture detailing the geological features that constrain TBM penetration in hard rock crystalline terrains as found in New York City.  Using case histories from the Queens Tunnel, East Side Access, Manhattan Tunnel, and Con Edison Steam Tunnel, Merguerian will explain how the combined effects of lithology, metamorphism, and geological structure control efficient tunneling.  Simple geological investigations during the pre-bid stage are the most cost-effective means to mitigate losses encountered during TBM tunneling.

Biographical Sketch

Dr. Merguerian is recognized as the leading authority on the geologic structure and tectonics of New York City and vicinity.  He is Chairman and Professor of Geology at Hofstra University in Hempstead, NY and Director of Duke Geological Laboratory in Westbury, NY.  Merguerian has gathered nearly 40 years of professional experience in geologic mapping and structural analysis of complexly deformed metamorphic terrains, plutonic- and volcanic districts, and areas underlain by sedimentary- and glacial strata throughout the United States.  Since 1972, he has performed pure- and applied research and has published over 190 geological maps, papers, technical reports, field guides, and abstracts from such widely separated areas as southeastern New York and New York City, New Jersey, western Connecticut and Massachusetts, central and southern California, Wyoming, Arizona, Nevada, and Hawaii.

In the past decade Merguerian’s research efforts have focused on field- and tunnel mapping and laboratory research on the subsurface structure of New York City and vicinity.  As a consultant, he has concentrated on geologic mapping of tunnels bored by tunnel boring machines (TBM) and by traditional drill and blast methods.  This work has paved the way for more efficient tunneling and excavation of rock in the New York City area and has opened the field for municipal mega-construction projects including water, utility, and transportation tunnels.


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