46. Multi-head hammer drill makes advances in rock socket drilling function for large diameter bored piling
-
Published:1992
J. Nakayama, 1992. "46. Multi-head hammer drill makes advances in rock socket drilling function for large diameter bored piling", Piling European practice and worldwide trends: Proceedings of a conference organized by the Institution of Civil Engineers, and held in London on 7–9 April 1992, Institution of Civil Engineers
Download citation file:
Large diameter rock socket drill of recent development come to the stage of actual applications for rock socket bore piles and advance drilling for rock socket diaphragm walls in construction projects. This paper introduces drilling principle of the multi-head hammer drill and features of its applications to hard ground drilling in specific constructions.
INTRODUCTION
Principle of Multi-head Hammer Drill
Ho Tung Lau Project, Hong Kong
Puerto Deseado Piled Jetty, Argentine
White Swan Bridge Project, Japan
JRC Project, Hong Kong
Adjustability of air pressure for different geological formation
