中文摘要：

从桩间岩体破坏形式出发，分析抗滑桩间岩拱效应的存在，并结合岩土性质差异对土拱与岩拱特性进行对比分析。在此基础上，根据岩拱基本特性，建立岩拱分析的假设条件，利用结构力学两铰拱理论对岩拱的水平推力、弯矩等进行计算。在跨中利用岩体极限平衡条件，求出岩拱拱轴线表达式。结合岩体拱效应发挥程度与工程安全经济，对岩质边坡合理桩间距进行分析，并与传统方法进行对比。结果表明：本文方法更接近工程实际。

英文摘要：

The rock-arch effect occurring between anti-slide piles was analyzed from the angle of the forming mechanism of soil arching effect. The characteristics of soil and rock arches were compared against the difference in characteristics of soil and rock. Assumed conditions for analysis of rock arches were established on the basis of fundamental characteristics of rock arches, and the two-hinged areh theory and structural mechanics were applied to calculate the horizontal thrust and moment of rock arch. The expression of rock arch axis was determined by utilizing the ultimate equilibrium conditions in mid-span rock mass. The rational spacing between adjacent piles was analyzed by restricting the vector height of rock arch, and the analysis process was carried out in consideration of the characteristics of rock slopes and their supporting form.