软弱淤泥土层机械成孔灌注桩施工技术

Construction Technology of Mechanical Bored Pile in Soft Silt Soil Layer

在流塑状淤泥质土中采用全护筒跟进旋挖机成孔的施工工艺,避免流塑状淤泥质土在旋挖过程中和旋挖机钻头拔出后出现缩颈和塌孔,保证井桩成孔质量。

In the fluid-plastic muddy soil,the construction technology of full-shield follow-up rotary excavator hole formation is adopted to avoid necking and collapse of the fluid-plastic muddy soil in the process of rotary excavation and after the drill bit of rotary excavator is pulled out.Guarantee the quality of bored pile.