(1 同济大学地下建筑与工程系  上海 200092； 2 宝山钢铁股份有限公司  上海 201900)
【提要】  对四根软土地基中超长PHC桩进行抗拔和抗压载荷试验，分析软土地基中超长PHC桩的抗拔承载力和抗压承载力特性，为今后的设计和施工提供参考。抗拔试验结果表明，上拔荷载在超长PHC桩有效预压应力范围内，桩顶上拔量与荷载呈线性关系；抗压试验表明，超长PHC桩荷载沉降曲线为缓变型，承载潜力较大，实际抗压承载力大于根据土工参数估算的承载力。
【关键词】  超长PHC桩  抗拔  抗压  静载试验
Verticalload Test of Superlong PHC Pile Driven in Soft Ground/Xie Yongjian1,Zhu Hehua1,Wang Huaizhong2,Yu Ning1(1 Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China;2 Baoshan Steel Co.,Ltd.,Shanghai 201900,China)
Abstract:The verticalcompression load test and tension load test of four PHC piles driven in soft ground are presented.The verticalcompression and tension bearing capacity are iscussed and some suggestions are given for design.The tension test results show that the tension load is linear to tension displacement when it is less than the value of prestressed load of PHC piles.And the compression test results show that the curves of compression load and settlement is nonlinear and the bearing capacity is greater than the one calculated basing on parameters of soil.
Keywords:PHC pile;verticalcompression;tension;load test