【摘要】 结合岩溶地区2根大直径人工挖孔灌注桩的静载荷试验和应力测试结果,对桩的荷载传递特性进行了详细的对比分析。用双曲线模型拟合了摩阻力与相对位移之间的关系。分析结果表明,桩端岩溶对桩承载特性的影响,主要表现为对整个桩身桩侧摩阻力的影响,对桩身上部主要影响其临界位移,对桩下部的临界位移和极限摩阻力皆有影响。更多还原

【Abstract】 Based on the results of static load tests and stress tests for two large diameter cast-in-place piles in karst area,the load transfer behavior of piles is analyzed and compared. The relationship between shaft resistance and relative displacement is fitted with a hyperbolic model. According to the analysis results,the karst cave under pile-end mainly effects the shaft resistance around the whole piles. In the upper part of pile,only the critical displacement is affected while the critical displacement and limited shaft resistance are all effected in the lower part of the pile.更多还原