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近年来,发现部分采用抗滑桩工程治理后的高速公路滑坡支护结构失效现象时有发生,而公路沿线工程治理后滑坡的稳定性监测评估工作仍没有切实可行的技术标准。针对抗滑桩失效现象,基于抗滑桩内力计算方法——“K”法,通过理论方法试算建立了抗滑桩桩顶位移与桩身最大弯矩、桩径、锚固段长度、悬臂端长度和地基系数之间的关系式,并运用已有文献中的设计实例验证了该公式的合理性,误差在合理范围内。该公式为初等函数组合而成,易于运用到预警系统中。针对具体的抗滑桩设计方案,输入相关参数,可得出桩顶最大位移值,并将其作为判据,结合监测资料对滑坡进行预警预报。
In recent years, it has been found that some of the failures of highway landslide support structures after the anti-slide pile engineering treatment have occurred. However, the monitoring and evaluation of the stability of the landslide after highway engineering treatment still does not have practical technical standards. Aiming at the failure phenomenon of anti-sliding piles, based on the calculation method of internal forces of anti-sliding piles - “K ” method, the displacement of top of anti-slide pile and the maximum bending moment, pile diameter, The relationship between the length of cantilever end and the coefficient of foundation is validated by the design examples in the existing literatures. The error of the formula is reasonable. The formula is a combination of elementary functions, easy to use early warning system. According to the design scheme of anti-slide piles, inputting the relevant parameters, the maximum displacement of pile top can be obtained and used as the criterion to predict the landslide with the monitoring data.