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针对单桩的承载沉降规律及试验结果与数值模拟结果的差异较大的问题,采用试验分析和数值模拟相结合的方法,运用FLAC3D有限差分软件进行单桩数值静载试验模拟,通过对比实测数据和模拟数据结果发现:桩顶沉降误差为0.03mm,是实测值的6.3%.通过桩-土体的沉降计算接触面相对位移发现,粘性土极限位移为6~12 mm,施加到最后一级载荷时,桩-土体的相对位移未达到此值,因此,桩侧阻力载荷分担曲线呈上升趋势.
According to the settlement law of bearing capacity of single pile and the big difference between test results and numerical simulation results, the numerical static load test of single pile is simulated by FLAC3D finite difference software through the combination of experimental analysis and numerical simulation. By comparing the measured data The simulation results show that the settlement error of the pile top is 0.03mm, which is 6.3% of the measured value.According to the relative displacement of the contact surface calculated by settlement of the pile-soil, the limit displacement of the clay soil is 6 ~ 12mm and applied to the last stage When load, the relative displacement of pile-soil does not reach this value, so the load-sharing curve of pile-resistance increases.