对成桩质量可靠性低的灌注桩采用什么试验方法进行承载力检测

2025-03-15 22:49:30
推荐回答(1个)
回答1:

根据你所述的情况,基桩检测的项目我认为主要为以下两项内容:一、单桩竖向抗压承载力: 1、如果地质条件复杂、桩施工质量可靠性低,则应当采用单桩竖向抗压承载力静载试验进行验收检测;检测数量在同一条件下不应少于3根,且不宜少于总桩数的1%;当工程桩总数在50根以内时,不应少于2根。 2、反之,如果地质条件简单、桩基施工质量可靠性较高,则不必进行单桩竖向抗压承载力的测试。二、桩身质量: 1、如果地质条件复杂、成桩质量可靠性较低,则应对桩身完整性进行检测,采用的方法通常是我们所说的“小应变”动测,它利用的是地震波在桩体的传播速度变化来对桩身质量进行检测。抽检数量不应少于总桩数的30%,且不得少于20根;其他桩基工程的抽检数量不应少于总桩数的20%,且不得少于10根。对端承型大直径灌注桩,应在上述规定的抽检桩数范围内,选用钻芯法或声波透射法对部分受检桩进行桩身完整性检测。抽检数量不应少于总桩数的10%。 2、反之,如果如果地质条件简单、桩基施工质量可靠性较高,则可以减少抽检数量,甚至完全取消也不会有太大的问题。可见,对于地基基础设计等级为丙级的普通灌注桩而言,地质条件复杂程度及成桩质量的可靠性对桩基的检测内容和...

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