济(南)徐(州)一级公路长清县崮山500多米高填土路段,土基密实度差,1985年汛期后出现大面积严重沉降变形,经挖验土层知为中液限粘层,自然含水量偏大,采用爆破成孔灌注灰土砂砾桩来稳定土基,简单易行,效果显著。炸孔位置以梅花桩形交错布置,间距4—5米。由人工闯针冲孔后,选用硝酸铵黄色炸药,并掺入2%的 TNT 装入塑料圆管内,以电雷管引爆成炸孔,回填灰 Ji (South) Xu (state) highway Changqing County Dangshan 500 meters high fill section, poor soil compaction, large floods in 1985 after a large area of ​​severe settlement deformation, soil testing known as the liquid limit Viscous layer, the natural water content is too large, the use of blasting into the hole lime sand gravel pile to stabilize the foundation, easy to implement, the effect is significant. Punch hole position to staggered arrangement of piles, spacing of 4-5 meters. Punched by the artificial needle, the use of ammonium nitrate yellow explosives, and mixed with 2% TNT into the plastic pipe, electric detonator detonated into a hole, backfill