复合桩桩端建筑再生料夯密施工技术

Construction Technology of Building Regeneration Material Compaction at the End of Composite Pile

采用跟管旋挖钻进的方法成孔,能有效保证软弱土层中孔壁的稳定,无挤土效应,降低对地层的扰动,并且无泥浆排放。桩端夯填黏土块形成临时止水层,防止地下水涌进钻孔对后续夯填施工的影响。桩端扩大体由建筑再生料和干硬性混凝土夯填形成,显著提高了基桩的承载力,并且有效利用了建筑垃圾,促进资源回收再利用。

The method of following pipe drilling is used to make holes,which can effectively guarantee the stability of the hole wall in the weak soil layer,no soil crowding effect,and reduce the disturbance to the formation,and no mud discharge.A temporary stop-water layer is formed by ramming clay blocks at the pile end to prevent the impact of groundwater intrusion on the subsequent ramming and filling construction.Pile end expansion is mainly formed by building recycled materials and dry concrete ramming,which significantly improves the bearing capacity of foundation piles,and effectively uses building waste to promote resource recovery and reuse.