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Jacking of Long Pipe Section Beneath a Highway
Author(s) -
Goldfinger Henry
Publication year - 1960
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.1960.tb00475.x
Subject(s) - jacking , clearance , structural engineering , roof , engineering , geotechnical engineering , settlement (finance) , section (typography) , forensic engineering , geology , medicine , art , performance art , world wide web , computer science , advertising , business , payment , urology , art history
An awareness of the critical factors and proper design aided a contracting company to pass a 1/2‐inch thick, 66‐inch diameter steel shell beneath a six‐lane highway in Queens, New York. The job was done without mishap or settlement of the road above. The 102‐ft pipe was held to a 1‐in. line and grade tolerance without difficulty, and cleared a 48‐in. overhead sewer by 8 in. at the receiving end. Although the contractors were prepared to sink a shaft at midpoint and jack from both ends, this was not necessary. Sufficient jacking force was made available to push the pipe through without excessive deviation; the pipe was made heavy enough to withstand buckling. The steel pipe acted as a cylinder through which a 48‐in. concrete water line passed. The space between pipes was later grouted.