Abstract:

The contents and geological conditions of the UmirayAngat transbasin tunnel in Philippines are described in this paper. The actual advance rate during construction is analyzed and compared with that predicted in the design stage. Then the relationship among the penetration rate, the machine performance and the geological condition are analyzed and discussed, including an evaluation on the reliability of the internationally wellknown empirical formula. The successful completion of the project on time with acceptable quality is due to the sophisticated investigation in geology during design stage, a rational contract schedule, the excellent construction skill and the quick response to the changing conditions. It sets up a milestone for providing overseas technical services in TBM for Taiwan’s consultants and gains experience and proves achievements in international tunnel projects.