Faced with an unusual sinkhole conditions, the Pennsylvania Department of Transportation decided to utilize a two-way reinforced earth slab in conjunction with a subsurface grouting program to stabilize a roadbed area. The reinforced earth slab proved to be less expensive and quicker to construct than a comparable concrete slab. Although the earth slab was designed to bridge a 50 ft (15.5 m) void, the grouting program would inhibit such a large void from forming. Extensive subsurface exploration including development of an electronic resistivity profile, indicated conventional bridge structures could not be supported. Specially designed settlement and strain gages will monitor the slab's activity after construction. /CE-ASCE/

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Filing Info

  • Accession Number: 00126478
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 16 1975 12:00AM