Abstract: Based on 14 piles under Yuanrong Bridge of Suzhou Metro Line 8 left line tunnel, the pile cutting effect, cutting parameter change and characteristics, tool wear and bridge structural response were analyzed by theoretical analysis and field monitoring methods. The feasibility of cutting multiple reinforced concrete piles with full hob in short distance soft soil is discussed. Results are as follows. The whole hob can directly cut the pile foundation, the cutting mechanism is mainly based on rolling shear damage, and the tensile and torsional damage is assisted. When cutting the pile, the measured pushing speed is stable at 1.74～2.63 times of the minimum set pushing speed, and the torque will increase with the fluctuation of the soil bin pressure, which is easy to produce bad conditions such as tool wear and knife collapse. It is suggested that the fluctuation value of soil bin pressure should be controlled within 0.1 bar during construction. There is a linear relationship between cutting thrust and torque and penetration degree. The maximum and average thrust of cutting pile foundation construction is about 119.6% and 110.4% of that of conventional stratum driving, respectively, and the maximum and average torque are about 125.6% and 114.4% of that of conventional stratum driving, respectively. After the tunnel is broken through, the hob has no bias grinding and no mud cake, the maximum wear of the blade is 2 mm, the maximum rise of the bridge is 3 mm, and the maximum settlement is 7.2 mm, indicating that it is feasible for the overall hob to drill and cut two or multiple reinforced concrete pile foundations in the short distance of soft soil.