摘要
高压脉冲放电技术可利用液电效应产生的冲击波,在钻孔局部产生扩孔段,通过灌注水泥而形成异径扩底桩。主要介绍了高压脉冲放电技术的扩底成桩机理、成桩过程以及对桩径的影响情况,并研究了冲击波、蒸汽膨胀压力对桩径的作用。利用新引进的高压脉冲放电装置进行现场试验,试验结果表明,理论公式计算结果基本与试验结果符合。
Shock wave is generated by the electro-hydraulic effect in high-voltage pulsed discharge technology, and local hole reaming is built in downhole. Finally, pedestal piles with different diameters are formed via cement injection. This pa- per describes the high-voltage pulse discharge technique about the pile forming mechanism by hole bottom reaming, the pile forming process and the effect on the pile diameter, studies the work of shock wave and vapor expansion pressure on pile di- ameter. The field experiment is carried out by using a newly introduced high-voltage pulse discharge device, the results show that the theoretical formula results are in good agreement with the experimental results.
出处
《探矿工程（岩土钻掘工程）》
2017年第5期68-71,共4页
Exploration Engineering:Rock & Soil Drilling and Tunneling
关键词
钻孔灌注桩
扩底桩
高压脉冲放电
桩径变化
冲击波
bored grouting pile
pedestal pile
high-voltage pulse discharge
pile diameter change： shock wave
