竖向荷载作用下夯实水泥土楔形桩桩身峰值应力变化规律研究

Research on the Variable Regularity of Rammed Soil-Cement Tapered Piles Peak Stress Under Vertical Loading

运用数值模拟与试验验证相结合的方法,研究竖向荷载作用下夯实水泥土楔形桩桩身峰值应力变化的规律。研究结果表明,当楔形桩楔角相同时,桩身峰值应力所对应的深度基本为一个定值,且与竖向荷载大小关系较小,进而提出桩身峰值应力深度比的概念;桩身峰值应力深度比与楔形桩楔角的关系,在数值上可以近似用直线与抛物线分段拟合,且拟合程度较高。

Based on numerical simulation and experimental verification,a research has been conducted on the variable regularity of rammed soil-cement tapered piles peak stress under vertical loading.Experimental results show that the depth corresponding to the pile peak stress is basically a fixed value,which has little to do with the vertical loading,for wedge piles with identical wedge angles.A concept of pile peak stress depth ratio has thus been proposed:the relationship between the depth radio of pile peak stress and wedge angles can be approximately fitting with that between straight lines and parabolic sections with a high degree of fitting.