Research on Numerical Simulation of Environmental Influence of Continuous Vibration Pile Sinking Construction
The structural element in FLAC3D software is used to simulate the steel pipe pile.The pile-soil interac-tion is considered by setting the contact surface,the con-tinuous sinking of the steel pipe pile is simulated by the element partition technique,and the dynamic response law of the soil around the pile in the process of pile sinking is analyzed.The results show that in the range of 9 times the pile diameter,the peak value of vertical and radial velocity of the ground surface decrease rapidly with the increase of distance,when the distance is more than 5 times the pile diameter,the dynamic influence of resonance-free pile sinking construction on the soil around the pile can be reduced to below the recommended value in the code;the larger the soil depth is,the greater the pore water pressure increment around the pile is,and the smaller the radial range of the pore water pressure affected area is;the pore water pressure changes rapidly in the range of 5 times the pile diameter,and the pore water pressure of the soil around the pile is greatly affected within the range of 2 times the pile diameter.
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