浅谈桥梁钻孔灌注桩施工中的质量控制

钻孔灌注桩因其施工简便、操作易掌握、承栽能力大,抗冻性强、耐冲刷及经济效益好的特点,在公路桥梁建设和在各类工业及民用建筑的基础施工中都得到了广泛应用.施工前应认真核查地质和有关灌注桩方面的资料,对灌注桩在钻孔施工过程中可能会出现的坍孔、缩孔、钻孔偏斜、钻头掉落和灌注水下砼时发生断桩、砼夹渣、不均匀等的质量弊病问题进行分析,并制定相应的预防和处理措施确保钻孔灌注桩的质量满足设计要求和使用功能.以杭浦高速公路第三合同段为例,对施工中可能出现的质量问题进行分析.

Quality Control of Cast-in-situ Bored Pile Construction

Cast-in-situ bored pile is applied extensively in road and bridge construction and architecture base construction because of convenient construction technique,simple operation,large bearing capacity,strong anti-freezing capacity,impact-endurance and good economy.Before construction,the data of geologic and bored pile shall be checked carefully,all quality questions including slump,shrink hole,deflection,bit dropping and pile faulted,slag with concrete,not uniform during boring under water concrete shall be ...