PRESTRESSED CABLE ANCHORING WITH CONSOLIDATION GROUTING FOR IMPROVEMENT OF SLOPE STABILITY UNDER KHUNI NALLAH HIGHWAY BRIDGE ABUTMENTS

The paper describes the installation of cable anchors to stabilize a hill slope on which the Khuni Nallah Bridge was to be founded. The highway bridge was required as a means of bypassing an unstable, rock-slide prone section of main highway. The instability being due to the adverse joint patterns as well as the unfavourable dip of the rock, which had veins of schist as potential failure planes. The stability of the slope has been achieved by installation of 89 nos 100 tonne capacity bbrv prestressed cable anchors which were 17 to 20 metre long driven normal to slope. This paper describes in detail the various design criteria for installation of cable anchors which were followed while evolving the scheme. It also gives in detail the response of the rock to the consolidation grouting, the progressive improvement in the rock strata as reflected by permeability tests and the result of extensions of prestressed cable anchors actually achieved at site against theoretical extensions derived in design. /TRRL/

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  • Corporate Authors:

    Indian Roads Congress

    Jamnagar House, Shahjahan Road
    New Delhi,   India  110 011
  • Authors:
    • Gopalaru, NDGCG
    • Ghosh, S K
    • Siddiqui, S H
  • Publication Date: 1978-10

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Filing Info

  • Accession Number: 00195519
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Aug 15 1979 12:00AM