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GB 50202—2002《建筑地基基础工程施工质量验收规范》中对桩基础的桩身质量有严格要求,尤其是灌注桩。因受现场施工环境和施工工序、方法的影响甚大,应采取适当措施避免灌注桩断桩、钢筋笼上浮等常见质量问题,且须正确选择混凝土的浇筑方式。施工现场灌注桩混凝土的浇筑方式通常采用工具式钢导管进行,即单根导管重复利用形式(图1)。但对某些特殊形式的桩,此方法有一
GB 50202-2002, “Code for Acceptance of Construction Quality of Foundations of Building Foundation” has strict requirements on pile mass of pile foundation, especially for cast-in-place pile. Due to the on-site construction environment and construction process, the method has a great impact, and appropriate measures should be taken to avoid the common quality problems such as broken piles and steel cage floating, and the concrete pouring method must be correctly chosen. Construction site pouring pile concrete pouring method is usually used tool steel conduit, that is, a single conduit re-use form (Figure 1). But for some special forms of pile, this method has one