Problems in Deep Foundation Construction in Taiwan

This paper addresses problems in deep foundation construction in Taiwan. Some of these problems are unique to Taiwan, but several others are universal. Four areas of concern are presented here: inadequate dewatering procedure, inadequate lateral bracings, poor workmanship in slurry wall construction, and inadequate consideration of soil pressures. Lack of monitoring, the water table during dewatering attributed to collapses of several foundations. Inadequate connection or spacing of walings and struts contributed to the failure of lateral bracings. Poor workmanship in reinforcement placement occurred during slurry wall construction. Failure to understand soil characteristics had caused frequent excessive soil pressure. In this paper, we present illustrations of such problems in Taiwan and suggest preventive methods. Several of the deficiencies explained in each problem area could easily have been avoided simply by adopting stricter quality control measures and by enforcing the specifications in field practice. Prequalified foundation contractors should have adequate knowledge of soil conditions and behavior and should be safety‐conscious.