DETERMINE THE INTENSITY OF BORED CONCRETE THROUGH ULTRA SOUND PULSE TRANSMISSION SPEED XÁC ĐỊNH CƯỜNG ĐỘ BÊ TÔNG CỌC KHOAN NHỒI THÔNG QUA VẬN TỐC TRUYỀN XUNG SIÊU ÂM

Abstract

The importance and practical contributions of bored piles in the field of construction are extremely large and bold. Most of the high - rise buildings on the territory of Vietnam are firmly built on the bearing foundation system as bored piles, meeting high requirements on bearing structure as well as increasingly advanced concrete construction technology. Nowadays, the quality of bored piles is controlled based on TCVN9396: 2012 [2]. However, this standard still has many shortcomings, causing significant difficulties in checking and accepting bored piles after construction. The research has provided practical solutions to remove obstacles that the standards are facing, namely: through ultrasonic transmission speed to determine the concrete intensity of bored piles. This is the limitation in the standard TCVN 9396: 2012 [2] is currently applying.