Calculation approach for deformation of adjacent pile foundation caused by diagonal intersection with side penetration construction of shield tunnel
The calculation approach for the deformation of existing bridge pile foundation caused by diagonal intersection with side penetration construction of the shield tunnel was established.The approach was established based on the modified Loganathan formula,the Winkel elastic foundation beam model,the m-method calculation theory and the load transfer method,taking the circular section pile as an example.The engineering applicability of the calculation approach was verified through field monitoring results,and the method was used to analyze the main influencing factors of horizontal deflection deformation of piles caused by the diagonal intersection with side penetration construction of shield tunnel.Results showed that the maximum error between the theoretical results and the monitoring results for the horizontal displacement of the pile body and the vertical displacement of the pile top were less than 14.6%and 2.7%,respectively.The calculation results of the proposed method were closer to the measured values,compared with that of the existing methods.The horizontal deflection of the pile body in the entry section was negatively correlated with the horizontal distance between the tunnel axis and the center axis of the pile foundation,and the oblique angle of the tunnel side penetration.The maximum horizontal deflection displacement was also negatively related to the tunnel side penetration angle.The maximum horizontal deflection was 7.4 mm at the horizontal side penetration distance of 6.0 m,while the maximum horizontal deflection displacement was 15.4 mm at the tunnel shield side penetration angle of 70.0°.
shield tunneldiagonal intersection with side penetrationadjacent bridge pile foundationdeforma-tion lawhorizontal deflection deformation of pile
NETL
NSTL
万方数据
维普
