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针对施工过程中地质情况复杂、孤石多,普通成桩工艺成孔效率低下,难以满足实际要求的问题。提出一种结合潜孔气钻及普通冲击钻各自优点的成孔灌注桩施工工法。该工法在实施过程中对一些细节上的技术要点进行处理与控制,最终形成正式施工工法。实际实施中表明了本文工法对孤石及整体岩石分布区域的成桩的有效性。
Aiming at the problems that the geological conditions are complex during the construction process, there are many boulders and the hole forming efficiency of ordinary pile forming technology is low, it is difficult to meet the actual requirements. A new method of construction method of hole-injection bored pile combining the merits of down-hole gas drill and ordinary impact drill is proposed. The method in the implementation process of some of the details of the technical points for processing and control, and ultimately the formal construction method. The actual implementation of this article shows the effectiveness of this method on the formation of boulders and overall rock distribution area.