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本文依据鲜有的现场钻孔灌注桩静载抗压破坏性试验资料,采用现场实测数据分析和数值模拟相结合的方法,运用ABAQUS有限元软件进行单桩数值静载试验模拟。结果表明:荷载-沉降曲线线性段处,侧摩阻力沿深度方向逐步发展,达到一定值就趋于稳定;下降段处,侧摩阻力沿深度方向呈线性分布,并且随着荷载的增大而逐步增大,慢慢逼近极限值。随着荷载的增大,桩和土有脱开的趋势,并逐步往桩顶方向发展,导致了侧摩阻力最大值逐渐上移。
Based on the experimental data of the static compressive destructive test of cast-in-site bored piles, this paper uses ABAQUS finite element software to simulate the static load of a single pile by using the combination of field measured data analysis and numerical simulation. The results show that at the linear section of the load-sink curve, the lateral friction gradually develops along the depth and reaches a certain value and tends to be stable. At the descending section, the lateral friction is linearly distributed along the depth, and as the load increases Gradually increase, slowly approaching the limit. With the increase of load, the tendency of pile and soil disengaging and gradually developing towards the top of the pile led to the gradual upward shift of the maximum friction resistance.