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PHC管桩在天津淤泥质软土中的应用

ZHANG Qi,WANG Tianbao, HU Haijiang

Soil Engineering and Foundation(2021)

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Abstract
预应力管桩的主筋选用高强度、低松弛的螺纹钢筋,强度高,抗弯、抗裂性能强;选用高强度混凝土,单桩承载力高;桩身防腐性能好,设计选用范围广,适应多种地层;施工周期短,绿色文明施工好.以PHC管桩在天津典型淤泥质软土工程为例,选定合理的桩型、桩长,考虑管桩的土塞效应,通过设计验算,单桩竖向承载力特征值满足设计要求.结合单桩竖向载荷试验和桩身完整性检测试验结果,单桩承载力和桩身完整性均满足设计要求,表明PHC管桩在软土中具有一定的应用价值.
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