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富锦-绥滨松花江大桥基础采用直径2.0 m的钻孔灌注桩。通过数据采集,由锚桩法测得的45 m试桩和自平衡测得的70 m试桩上段桩的荷载-沉降关系、竖向承载特性、桩侧摩阻力等进行对比分析。分析结果表明:在极限状态下,两者位移相差14.97 mm,侧阻力相差7.30%;长、短试桩各土层桩侧阻力的实测值都满足要求。在桩-土体系破坏之前、相同荷载条件下,两者位移的差值有变大的趋势,相同土层的桩侧摩阻力相吻合。
Fujin - Suibin Songhuajiang River Bridge using the basic diameter of 2.0 m bored piles. Through data collection, the load-settlement relation, vertical bearing characteristics and pile-side friction resistance of the 45 m test piles measured by the anchor piling method and the self-balancing test pile of the 70 m test piles were compared and analyzed. The analysis results show that the displacements of the two sides are 14.97 mm and the lateral resistance are different by 7.30% in the limit state. The measured values of lateral resistance of the long and short test piles satisfy the requirements. Before the failure of pile-soil system, under the same load condition, the difference between the two displacements tends to increase, and the pile-side frictional resistance of the same soil layer coincides.