DESIGN OF PRESTRESSED CABLE ANCHORS FOR STABILIZATION OF HIMALAYAN SLOPES

Abstract

The assessment of stability of slopes particularly in the geologically poor environment for the safety of important and major projects needs careful attention. The adopted measures should be capable to resist the destabilizing forces and compatible with the life of adjoining structure. Stabilization methods viz, wire crates or constructing retaining walls/ breast walls with drainage arrangement, rock bolts etc. are adequate for small slopes but are insufficient to cope up large de-stabilizing forces of unstable slopes. Further, the excavations needed in adverse jointing pattern system for founding some important structures (e.g. dam, power intake, power house etc.) may require extensive stabilization measures. The prestressed anchors plays vital role to resist the de-stabilization forces of sufficiently large magnitude. The details covering design principles, selection of particular type of anchor, load transference mechanism, adoption of bond stresses, corrosion protection measures and stressing of anchors alongwith three case studies have been discussed in this study....