中文摘要：

针对位于深厚淤泥地基上的高路堤桥台的冲孔灌注桩,进行了1.5 a的现场实测,测试了修筑承台前、修筑桥台期间、邻近过渡段的路基填土期间、过渡段的路基填土期间及跨梁修筑后的桩身应变和桩侧土体孔隙水压力,也测试了基桩的挠曲变形和桥台的倾斜变形,基于实测结果对基桩的受力变形性状进行研究。结果表明,桥台基桩在承受上部结构荷载以前就产生了压缩变形;在上部桥台和台后填土的共同作用下,桩身前后侧的轴向应变虽都表现为压应变,但应变值相差较大;台后路基填土完成后,桩身最大负弯矩出现在淤泥层浅部,最大正弯矩出现在软硬土层交界处,桥台发生较小倾斜;跨梁的修筑使桥台台身又恢复到竖直状态。

英文摘要：

The field measurement had been performed for one and a half years,which was aiming at the impact-cone concrete piles of the bridge abutments on the deep silt foundation.Before constructing the pile cap,during the period of building the abutment,constructing embankment near the transition section,constructing embankment of the transition section and after building the span beam,the abutment pile strain and the pore water pressure on pile side had been tested;and the pile deflection and the abutment inclination had been observed.Based on the measured data,the stress and deformation properties of the abutment pile are analyzed.The results show that： the abutment pile is compressed before constructing the pile cap;due to the interaction of superstructure and earth filling,the compressive strain of the front side of the pile body is remarkably different from that of the back side;after finishing subgrade filling,the maximum negative bending moment of the pile appears in the shallow position of the silt layer;and the maximum positive bending moment appears in the soft-hard soil juncture;the abutment inclination is rectified after constructing the span beam.