Description of interlocking precast units of new shape used in 4-ft drainage tunnel 170 ft long, under Pennsylvania Railroad tracks at Norristown, Pa; blocks made on job in hydraulic press having capacity of 400 blocks per day; shield design; tunnel driving; placing blocks.


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    Titel :

    Small shield-driven tunnel lined with trapeozoidal blocks


    Weitere Titelangaben:

    Eng News-Rec


    Erschienen in:

    Erscheinungsdatum :

    1933


    Format / Umfang :

    2 pages


    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :


    Shield driven tunnel and shafts

    Engineering Index Backfile | 1934


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