The paper describes a recent case of unprecedented hydraulic failure in Uttar Pradesh. A road bridge on Bahraich-Bhinga road across River Bhakla having 5 spans of 28.25 metres each with 15 metres deep foundation wells and usual guide bunds, was opened to traffic in December 1973. During the monsoon of 1975, well No.3 (pier No.2) from Bahraich side, settled by 19 cm on the upstream side and 11 cm on the downstream side, because of excessive scour (scour reaching almost the bottom of the well) caused by increased discharge concentration and obliquity of flow in the last three spans on bahraich side. As a result of settlement and tilt of pier No.2 (pier cap moved by 31 cm on upstream side), the superstructures of the adjoining spans rotated damaging the bearings so that traffic had to be suspended. Remedial measures like bed protection around piers and restoration of superstructure, were resorted to. Excessive scour in the case, has been justified on the basis of recent investigations which indicate that the local scour below general scour (regime) bed level can be as high as 2.4 times the well diameter. (TRRL)

  • Availability:
  • Corporate Authors:

    Indian Roads Congress

    Jamnagar House, Shahjahan Road
    New Delhi,   India  110 011
  • Authors:
    • SINGH, B
  • Publication Date: 1979-12

Media Info

  • Features: Figures; Photos; References;
  • Pagination: p. 279-295
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00319629
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Jan 19 1981 12:00AM