DESIGN and PERFORMANCE of FIBREDRAIN in SOIL IMPROVEMENT
The effective coefficient of consolidation Ch is a function of the hydraulic conductivity and compressibility of the clay as well as the field performance of prefabricated vertical drain (PVD). The effective discharge capacity of PVD is influenced by the deformation of the core and the filter, clogging of the filter and kinking of the PVD during the consolidation process. The design of soil improvement project using PVD is function of the effective Ch, the final settlement, the drain spacing as well as the lateral pressure on the drain. Prefabricated vertical drain should possess sufficient tensile strength to withstand installation stresses associated with thick clay deposits, as well as the densification of granular soil layer at the surface by heavy tamping. Fibredrain is a PVD that is biodegradable and ecologically harmonius. Several selected project in East and Southeast Asia are discussed to illustrate the field performance of Fibredrain.