Nowadays, more and more people have known Sheet Pile Vibratory Hammers. If the pile and driving system are suitably matched, check driving system operation for compliance with manufacturer’s guidelines. If no obvious problems are found, dynamic measurements should be made to determine if the problem is driving system or soil behavior related. Driving system problems could include low hammer efficiency and soft cushion. Soil problems could include greater soil strength than anticipated, temporarily increased soil resistance with later relaxation, large soil quakes, or high soil damping.
Soil resistance at the time of driving could be lower than anticipated or driving system performance is better than anticipated. Pile Driver Machine Engine will probably need to be driven deeper than originally estimated or additional piles will be required to support the load. Contact the structural engineer/designer for recommended change.
If boring do not indicate weathered profile above bedrock/bearing layer, then pile toe damage is likely. For piles that allow internal inspection, reflect light to the pile toe and tape the length inside the pile for indications of toe damage. For piles that cannot be internally inspected, dynamic measurements could be made to evaluate problem or pile extraction could be considered.
Piles may be moving out of alignment tolerance due to Pile Driver Power Pack or due to soil conditions. If due to poor hammer-pile alignment control, a pile gate, template or fixed lead system may improve the ability to maintain alignment tolerance. Soil conditions such as near surface obstructions or steeply sloping bedrock having minimal overburden material may prevent tolerance from being met.
Piles may be moving out of location tolerance due to hammer-pile alignment control or due to soil conditions. If due to poor hammer-pile alignment control, a pile gate, template or fixed lead system may improve the ability to maintain location tolerance.
If deep obstructions are encountered contact the engineer for remedial design. Ultimate capacity of piles hitting obstructions should be reduced based upon pile damage potential and soil matrix support characteristics. Additional piles may be necessary.
Check hammer-pile alignment since bending may be causing the problem. If the alignment appears to be normal, tension and bending combined may be too high. The possible solution is as above with complete cracks. If you want to know more, please visit www.yonganpiledriver.com
留言列表
