Abstract: 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.

Key words: deep silt foundation, high embankment, abutment pile, working properties, field measurement, earth fill