Numerical Analysis of the Bearing Capacity of Soil-filled Pile Driving by Guided Boring Based on GTS

This article uses the finite element GTS software to simulate and analyze the static load test of the ultimate bearing capacity of a single pile using the drilling and soil injection hammering process; This method uses the Moore Coulomb model to determine the constitutive relationship of soil, sets up pile interface elements between piles and soil, and combines with a project example in Doumen District, Zhuhai City. A finite element model is established using Midas GTS finite element analysis software. The simulation results of single pile static load are compared with the actual static load test results. The results show that by correctly setting the pile-soil parameters, the Q-s curve obtained from numerical simulation analysis is consistent with the measured Q-s curve trend and has similar values. Moreover, the pile side friction resistance is very small within the depth range of the weak soil layer, which is consistent with the actual distribution of pile side friction resistance. This indicates that the simulation results are effective. According to relevant specifications, the load value corresponding to the fitted Q-s curve s=40 mm is taken as the single pile. The ultimate bearing capacity of the engineering pile under the geological conditions of this project is calculated to be 6452 kN. This article provides a reference basis for determining the vertical compressive bearing capacity of drilled soil hammer driven pipe piles without static load test data.