浅析反循环钻孔灌注桩施工工艺

Discuss the Construct Techniques of the Reverse Circulation Drill Perfusion Stake

回旋钻施工中为了有效地清理钻渣,在正循环工艺中采取泥浆冲洗浮渣的方法,此方法对泥浆浓度和密度具有一定的要求,容易使孔底沉渣和孔壁泥皮过厚,而导致承载力折减,形成质量通病。通过采取反循环成桩工艺,可很好地解决这些问题,目前该工艺得到了广泛的推广。

In order to cleaning up the residue bringing by slewing construction, adopt slurry to wash the scruff in positive circulation craftwork, this method has strict demand of slurry thickness and density, and can easily make the bottom of bore have overfull residue and mud peel, all these would make bearing capacity reduce. While adopt the reverse circulation perfusion stake craftwork, can solve this problem, and this craftwork has been popularized broadly.