Grouted jetted precast reinforced concrete piling technology for no dredge seawall and land reclamation in Hong Kong

Abstract

Seawall and reclaiming land in Hong Kong have to be robust, cost-effective and environmentalfriendly. To achieve this goal, this paper introduces an innovative technology of originality for design and construction of continuous and impermeable seawall and land reclamation environmental-friendly and cost-effectively. It is called the grouted jetted precast reinforced concrete piling (GJPRCP) technology. It is briefly introduced at first. Applications are given for illustration afterward. The idea of GJPRCP based no dredge seawall and reclamation is presented and discussed with illustration of conceptual design and construction steps. It can form continuous and impermeable and robust reinforced concrete structural seawall. The seawall can be used as a continuous impermeable cofferdam and a diaphragm during the construction stage. Brief examination and discussion of both the practice of conventional dredge seawall and reclamation and the adoption of no dredge seawall and reclamation in Hong Kong can show that because of their high structural rigidity, the GJPRCP based no dredge seawall and reclamation can be acceptable, feasible and applicable in Hong Kong.