Unconventional Approach During Design and Construction of a 3-Cell-Cross Passage on Contract CQ-031 Queens Bored Tunnels in Queens, New York

摘要

Construction of cross passages on TBM projects proves to be a challenging task. Constructionrnmethods are different from the usual TBM approach, and require flexibility and often unconventional thinkingrnby owners and contractors.rnContract CQ031 of the East Side Access Project in Queens, New York required the construction of arn3-cell-cross passage between the Yard Lead Tunnel and an emergency exit / ventilation structure. The Granite/rnTraylor/Frontier-Kemper Joint Venture created an innovative solution by applying NATM principles. The paperrndescribes the design and execution of this sophisticated concept, including the challenges regarding groundrnimprovement, construction phases, selection of equipment, permanent lining works and schedule issues.