Numerical Analysis of Liquefaction Resistance Characteristics of Rigid-drainage Piles
To analyze the anti-liquefaction effect of rigid-drainage piles and provide support for practi-cal engineering applications,a numerical simulation analysis of rigid-drainage piles was performed.The reliability of the model was validated based on the measured values from model tests.The analy-sis focused on excess pore pressure ratio and pore water seepage characteristics around rigid-drainage piles with varying numbers of drainage channels.The results showed that:(1)The measured values closely matched the numerical simulation results,confirming the reliability and accuracy of the calcula-tion model.(2)The peak value of the excess pore pressure ratio was 0.7 at a distance of one pile diame-ter from the pile,and 1.0 at a distance of 1.5 times the pile diameter,indicating that the effective range of the rigid-drainage pile was approximately one pile diameter.(3)The influence range of drain-age piles with a single drainage channel formed an approximate semi-circle with the pile center as the origin and a radius of one pile diameter.For piles with double-sided and four-sided drainage channels,the influence range formed a full circle with the same center and radius.Additionally,the seepage vec-tors near the drainage channels all pointed toward the drainage channels,indicating the channels′ effec-tive role in drainage.