深厚淤泥质土层大长径比超深灌注桩施工技术

Construction Technology of Large Length Diameter Ratio Ultra Deep Cast-in-place Pile in Deep Silt Soil Layer

结合工程实例,介绍了深厚淤泥质土层中大长径比灌注桩施工中出现的难题并提出了相应解决方法。实践表明,这些方法的应用提高了工程验桩效率,减少了混凝土使用量、提高了桩孔垂直度、增加了泥浆箱的使用寿命、孔底沉渣清除效果好。

Based on engineering practice,this paper introduced the difficulties of large length diameter ratio cast-in-place pile construction in deep silt soil layer and proposed solution methods. Engineering practice shows that these methods can improve pile testing efficiency,reduce concrete dosage,improve verticality of pile holes,increase the service life of the mud tank,and the effect of hole bottom sediment clearance is good.