特殊地质条件下挖孔桩的处理方法

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。

Treatments for Excavation Filling Pile in Special Conditions

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.