钻探工程2024，Vol.51Issue(6)：152-159,8.DOI:10.12143/j.ztgc.2024.06.019
高压脉冲放电在大直径扩底灌注桩中的应用技术研究
Research on application technology of high voltage pulse discharge for large diameter cast-in-place belled piles
摘要
Abstract
This paper focuses on the pressure shock wave generated by the electric explosion of the wire acts on the hole wall of the soil layer and form the belled piles caused by squeezing the soil at the bottom of the pile.The relationship function and simulation model between the explosive energy of the wire and the shock wave pressure are established,and the relationship between the discharge parameters and the shock wave intensity is analyzed.The relationship between shock wave pressure and soil deformation is established,and the pressure required for the deformation of clay soil is calculated.The models of belled pile and equal diameter pile were made to verify the deformation characteristics of soil under the electric explosion of the wire,and the bearing capacity and pullout resistance of the two piles were compared and analyzed.Based on the electrical and technological parameters of the high-voltage pulse bottom expanding technology model test,the first high-voltage pulse belled pile with a diameter of 0.8m was constructed in China,and the"irrigation-expansion"integrated construction method was developed.关键词
脉冲放电/冲击波/扩底灌注桩/"灌-扩"一体工法Key words
pulse discharge/shock wave/cast-in-place belled pile/"irrigation-expansion"integrated construction method分类
建筑与水利引用本文复制引用
马宁,邓岳,凌雪,杨麟睿,钱阳,刘毅,黄仕杰..高压脉冲放电在大直径扩底灌注桩中的应用技术研究[J].钻探工程,2024,51(6):152-159,8.基金项目
中央高校基本科研业务费专项资金科研项目"类火星土层钻-测一体化土层反演方法研究"(编号:2652023004) （编号:2652023004）
