【摘要】 为了研究边坡效应对整体桥桩-土相互作用的影响，开展了受边坡影响的钢筋混凝土(RC)桩-土相互作用拟静力试验研究及有限元扩展参数分析，讨论了边坡效应对RC桩-土体系受力性能的影响.结果表明：迎坡侧的滞回曲线饱满度弱于背坡侧，且随桩侧至坡顶距离的减小而降低，桩-土相互作用也随之减弱；当桩侧至坡顶距离由2倍桩径减小至0以及坡顶至桩侧距离2倍桩径时，迎坡侧的桩顶最大水平力分别减小15.0%和28.6%,桩侧最大土抗力分别减小18.2%和26.6%,桩身最大弯矩分别减小8.0%和16.9%;桩侧至坡顶距离为2倍桩径且边坡角度小于20°或桩侧至坡顶距离大于4倍桩径时，桩侧至坡顶距离和边坡角度对桩-土体系受力的影响均较小，可按无边坡影响的桩设计；朝背坡侧位移时，桩-土体系受力基本不受边坡效应影响；边坡土摩擦角对桩-土体系受力的影响显著，在工程中可优先采用摩擦角较小的黏土.更多还原

【Abstract】 The pseudo-static tests and extended parameter analyses on the Reinforced Concrete(RC) pile-soil interaction considering slope effect were carried out to study the effect of slope on pile-soil interaction in integral abutment jointless bridges. The influence of the slope effect on the mechanical behaviors of RC pile-soil system is discussed. The results reveal that the hysteresis curve at slope side exhibits less plumpness compared to the opposite side of the slope. This plumpness decreases with decreasing distances from pile side to slope crest, leading to a gradual reduction in pile-soil interaction. When the distance from pile side to slope crest decreases from 2 times pile diameter to 0 and 2 times pile diameter from slope crest to pile side, the maximum horizontal forces of pile head at slope side decrease by 15.0% and 28.6%, respectively. Moreover, the maximum soil resistances surrounding the pile decrease by 18.2% and 26.6%, and the maximum bending moments of the pile decrease by 8.0% and 16.9%, respectively. When the distance from pile side to slope crest is 2 times pile diameter and the slope angle is less than 20° or the distance exceeds 4 times pile diameter, the influences of the distance and slope angle on the mechanical behaviors of pile-soil system are minimal. In such cases, the slope effect can be neglected in the design of pile. The mechanical behaviors of pile-soil system remain unaffected when the pile displaces towards the opposite side of the slope. However, the friction angle of the slope soil has a significant impact on the mechanical behaviors of pile-soil system. Consequently, clay with a smaller friction angle should be preferred in engineering.更多还原