强渗透性地层旋挖钻施工混凝土灌注桩质量通病分析

Analysis on Common Quality Defects of Concrete Grouting Pile with Auger Drill in Serious Permeable Formation

摘要:

对强渗透性地层旋挖钻进成孔混凝土灌注桩质量通病进行了分析，总结此类地层必须重视泥浆护壁质量对混凝土灌注桩施工质量的重大影响，必须重视钻斗的活塞抽吸对孔壁的破坏性，建议其验收标准中增加泥浆护壁质量验收，重视清孔后的孔径验收，不可完全沿用与旋挖钻孔泥浆护壁效果有着天壤区别的回转钻、潜水钻成孔混凝土灌注桩的质量验收标准。

Abstract:

The paper analyzed common quality defects of concrete grouting pile with auger drill in serious permeable formation, summed up the important effect of wall protection on concrete grouting pile. Quality acceptance standard of wall protection with mud is quite different to rotary drilling and water drilling for concrete grouting pile, the paper proposed that quality acceptance should replenish an item of wall protection with mud, take care of the diameter after hole cleaning.