Effectiveness of Toe-Grouting for Deep-Seated Bored Piles in Bangkok Subsoil

摘要

A comprehensive study on the effectiveness of two different toe-grouting methods, known as tube-a-manchette and drill-and-grout, commonly applied for deep-seated bored piles in Bangkok is presented in this paper. Mobilized unit end bearing of bored piles constructed by two toe-grouting methods are compared. The problems encountered in practical application of different methods for large diameter deep seated bored piles are highlighted. Despite considerable extra cost, various construction problems encountered and risks involved in successful execution of grouting, drill-and-grout method does not offer particular advantage over tube-a-manchette method as far as pile capacity improvement is concerned.