特殊地质条件下挖孔桩的处理方法

Treatments for Excavation Filling Pile in Special Conditions

挖孔灌注桩具有机具设备简单,施工操作方便,占用场地小,造价低等优点,因此,近几年在桥梁桩基施工中,得到广泛应用。笔者就济青南线高速公路马莱段毫山村大桥直径2.8m的桩基础采用挖孔桩的方法成孔,谈谈在一些特殊地质条件下人工挖孔桩常见问题和处理方法。

The excavation filling pile owns the merits such as simple equipments of machines and tools, convenient construction, smaller occupying site and less cost etc, so it has gained wide - ranging use in construction of bridge pile foundation in recent years. The author talks about some problems common in man - made excavation pile and treatments for them on that the pile foundation of 2.8m diameter of Haoshancun Bridge at southern line of Ji - Qing Freeway takes the excavation pile.