Design and construction of foundations for bridges on the Kuantan to Segamat Highway, Malaysia : Kemp, G J; Chew, S H Proc International Conference on Structural Foundations on Rock, Sydney, 7–9 May 1980, P271–281. Publ Rotterdam: A A Balkema, 1980

Abstract

This paper details the sub-surface investigations, design considerations and construction techniques associated with two bridges, namely the bridges over the keratong and rompin rivers. The 250 m long prestressed concrete bridge over the keratong river was designed to be overtopped during floods of large return period. Under such conditions and under some live load conditions tension could be induced into the precast concrete pier piles. In some locations, these piles were founded on fresh granite some 9 m below the pile cap and after allowing for some scour had insufficient penetration to provide adequate resistance against uplift. For this reason, the driven square precast reinforced concrete tension piles for the piers were cast with a central circular duct and after driving to bedrock and capped were post- tensioned to the bed- rock and grouted, using prestressed rock anchors. The 330 m long rompin river bridge was designed to be submersible and carried similar loads to those of the keratong river and as well was required to straddle a highly faulted rock zone which generally followed the course of the river in the vicinity of the bridge sito. The highly fragmented and crushed rock along the fault line had low bearing and tensile capacities and the piers supporting the main channel span of the bridge had to be founded on this crushed igneous and sedimentary rock.