折线型滑面滑坡桩排推力分布规律研究

大型滑坡多排、埋入式抗滑桩设计中，需要明确桩排间距、桩顶埋深不同时各排桩分担的滑坡推力的大小及桩身推力分布形式。采用室内模型试验方法，研究滑面形态为折线形、后陡前缓的折线型滑坡在滑面位置已知情况下各排抗滑桩分担的滑坡推力，并总结出折线型滑坡在桩排间距不同时各排桩分担滑坡推力的规律。同时采用有限元强度折减法对桩顶埋深改变时（前排桩不变）桩身推力分布形式的一般规律进行了分析，提出折线型滑坡桩排间距、桩顶埋深的变化能有效改善前、后排桩分担滑坡推力的比例。研究结论对于更加安全、经济地进行多排、埋入式抗滑桩加固大型滑坡的设计具有一定指导意义。

Study of landslide thrust distribution law of row of piles in reinforced landslide with polygonal line slip surface

During the design of multi-row and embedded anti-slide piles of large landslide, the most important thing which most designers are concerned about is the landslide thrust of each row of piles and the distribution mode along the pile when the row distance or embedded depth is different. It’s difficult to study all kinds of large landslides, so a typical landslide with polygonal line slip surface is studied. And in order to simplify the analysis, it’s assumed that it has specific landslide surface. Based on indoor model test, the general law about landslide thrust of each row of piles with different row distances is obtained. Also by the strength reduction finite elements, the distribution mode of landslide thrust along the pile with different embedded depths is analyzed. The result that the change of row distance or embedded depth is a proper method for optimizing the ratio of each row of piles is presented; and the landslide thrust distribution law of row of piles is a guidance for the civil engineering designers to accomplish more reasonable design of multi-row and embedded anti-slide piles in reinforcing large landslides.