高回填区软弱地基中人工挖孔灌注桩和机械旋挖钻孔灌注桩相结合基础技术研究

Research on Basic Technology of Combination of Artificial Pile and Rotary Pile in Soft foundation in High Backfill Area

基础工程施工时,常常会遇到在高回填区软弱地基上进行基础施工情况,由于高回填区域进行土方回填时,未考虑到后期发展规划建设问题,因此大多采用“散填”工艺,未进行任何的层铺、碾压等技术措施,造成在此地基形式上基础施工时,不管是人工挖孔灌注桩还是机械旋挖钻孔灌注桩工艺,都不能很好地一次性满足要求,严重影响施工进度、安全、质量。因此,研究人工挖孔灌注桩基础和机械旋挖钻孔灌注桩基础相结合的技术,为类似施工提供参考。

When the foundation works are constructed,the foundation construction is often encountered on the soft foundation of the high backfill area.Since the earthfill backfilling in the high backfill area does not take into account the post-development planning and construction problems,most of the "fillin" process is adopted. Any technical measures such as layering and rolling will result in the failure of the one-time construction of the foundation form,whether it is a manual digging pile or a mechanical rotary drilling pile. Construction progress,safety and quality. Therefore,we have carried out technical research on the combination of manual digging pile foundation and mechanical rotary drilling bored pile foundation,which provides reference for similar construction.