人工挖孔灌注桩

1
通过工程实例，介绍大孔径扩大桩头人工挖孔灌注桩的施工方法及质量保证措施。
Based on the engineering practice, this paper introduced constructional technique and quality assurance measures of big bore hole digging and pouring with expansion pile head.
2
介绍了人工挖孔灌注桩的施工工艺流程，详细阐述了人工挖孔灌注桩的施工方法。
This paper introduces the construction process flows of the hand-dug filling piles, and expounds the methods for the construction of he hand-dug filling piles.
3
本文就人工挖孔灌注桩设计与施工经常遇到的问题进行论述，并提出了解决的办法。
This paper discusses some cautions at manual hole-digging and pile-pouring Designing and construction, puts forward some resolvents thereto.

人工挖孔灌注桩
人工挖孔灌注桩，是指采用人工挖土成孔，然后安放钢筋笼，灌注混凝土成桩。人工挖孔灌注桩成孔方法简单，单桩承载力高，施工时无振动、无噪声，施工设备简单，可同时开挖多根桩以节省工期。人工挖孔灌注桩可直接观察土层变化情况，便于清孔和检查孔底及孔壁，施工质量可靠。但其劳动条件差，劳动力消耗大。其应用较为广泛。

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