超厚回填土中旋挖钻孔灌注桩塌孔处理应用研究

Application Research on Treatment of Collapsed Hole of Rotary Excavated Bored Pile in Super Thick Backfill

以云南某建筑边坡支护工程为背景,针对超厚回填土层中旋挖钻孔灌注桩塌孔问题进行应用研究。基于对塌孔原因和常规处理方法的分析,提出了“钢护筒+高压旋喷加固”的处理措施,经过工程应用,该处理措施有效解决了超厚回填土层中旋挖钻孔灌注桩塌孔的问题,并取得了良好的应用效果,为类似工程提供了宝贵的经验。

Taking the slope support project of a building in Yunnan as the background,the application research is carried out on the hole collapse of the rotary excavated bored pile in the super-thick backfill soil.Based on the analysis of the causes of collapse and conventional treatment methods,a treatment measure of"steel casing+high-pressure jet grouting reinforcement"is proposed.After engineering application,this treatment measure effectively solves the problem of rotary excavated bored piles in super thick backfill The problem of collapsed holes has achieved good application results,providing valuable experience for similar projects.