考虑土性变化的旧桩承载特性数值模拟

旧桩再利用是旧城改造建设中的重要技术。为合理模拟旧桩的承载特性,考虑应力历史以及时间效应对旧桩周围土体力学特性的影响,提出桩周土体参数的修正方法。以实际工程为背景,将模拟结果与实测数据进行对比,验证了数值模拟方法的合理性与可行性。

Reuse of old pile is an important technology in reconstruction of old city.In order to properly simulate the bearing capacity of old pile,by considering the influence of stress history and time effect on the mechanical behavior of soil around an old pile,a method of modifying the mechanical parameters of soil was proposed.Taking practical engineering project as background,the rationality and feasibility of numerical simulation method are verified by comparing the simulation results to the measured data.