花岗岩地区某项目冲孔灌注桩质量事故分析与处置及生态保护作用

Quality Accident Analysis and Corresponding Measures and Ecological Protection of Punch Filling Piles in Granite Areas

花岗岩地区冲孔灌注桩作为常用桩基类型,但常发生质量事故,往往造成承载力与设计值相差甚远的情况.常规的处理手段有高压后注浆、复压、补打灌注桩等处理手段,但都存在缺点和不确定性.工程通过补打预制管桩的处理方案,较好的处理了质量事故;同时,也保护了生态环境,避免了污染.图2,表1,参5.

Punch filling piles, as an usual type of piles in construction, often lead to quality accidents and cause the bearing far from the designed one. Since the common measures including high pressure grouting, repressing and filling piles had shortcomings and uncertainties, the measure of additional piling could deal with the accidents better. Meanwhile, it also protected the ecological environment and avoided pollution. 2figs. ,1tab. ,5refs.