A single double-duty bulkhead system supported opposite sides of a 60-ft-wide freeway in an alternating cut-and-cover operation, saving about $5,000 in time and materials for a contractor building a culvert beneath the road. As excavation proceeded on one closed side of the road, the centrally located, 35-ft-wide bulkhead supported the other side which continued to carry traffic. The concrete culvert was poured in the cut up to the bulkhead, the excavation backfilled, and an asphalt pavement laid on top. Traffic was then diverted to the completed half of the road (shored in turn by the same bulkhead) while the opposite side was dug out to receive its portion of the culvert. The bulkhead system cost about $7,000 (conventionally supported trenching would cost about $12,000). Choosing not to use a narrower trench saved double-wall shoring and transverse structural steel. The open cut's unrestricted working room helped speed culvert concrete pours. Details are outlined of the bulkhead construction which began with installation of 14-inch H-beams in seven holes opened 4 to 6 ft c-c in the roads center median with a bucket drill. Details are also given of a faster, cost-saving method that was used instead of a concrete deadman and cable tension ties to support the bulkhead during final excavation. Culvert pours, cable attachment, placing of the backfill, the laying of the asphalt road are also briefly outlined.

  • Corporate Authors:

    McGraw-Hill, Incorporated

    330 West 42nd Street
    New York, NY  United States  10036
  • Authors:
    • Parkinson, G
  • Publication Date: 1975-10

Media Info

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Filing Info

  • Accession Number: 00127945
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 21 1976 12:00AM