Model Test of Jacked Pile Penetration Process Considering Influence of Pile Diameter

In order to investigate the influence of different diameters on pile end resistance, side axial force and transmission law jacked penetration, two pairs embedded sensitized microfiber grating sensors were installed by slotting body. The pile-jacking process static-pressing viscous foundation soil with closed-tube model piles was successfully monitored. test results show that pressure, resistance increase linearly depth. When jacks, final pressure TP1 is higher than pile. TP2 31% higher, 18% total 57% higher. increasing diameter can significantly resistance; under penetration depths, from top end. Continuously exerted, body decreases depth slope distribution curve forcegradually decreases. At maximum depth, larger TP2; As increases, unit at same gradually decreases, is, has a “degradation effect”; jacking, percentage exceeds 50%, bears most load. This research be used as reference for study driving mechanism in clayey layered soils.