基于强度折减的刚性抗滑桩锚固深度确定  

Determination of the anchorage depth of rigid anti-slide piles based on strength reduction method

作　　者：胡晓军[1] 王建国[1] 

机构地区：[1]合肥工业大学,安徽合肥230009

出　　处：《土木工程学报》2007年第1期65-68,共4页China Civil Engineering Journal

摘　　要：分析边坡加固工程中抗滑桩锚固深度确定存在的问题,认为地层侧壁应力的容许值应符合摩尔—库仑强度准则,而不是采用土的被动抗力与主动压应力之差;抗滑桩锚固深度选取应考虑边坡工程等级;工程中常通过验算确定锚固深度,计算过程较为复杂,难以得出合理的结果。基于强度折减,考虑抗滑桩锚固深度的相关影响因素,利用抗滑桩内力分析的悬臂桩法,推得了刚性抗滑桩锚固深度的计算公式。公式理论推导严密,通过简单的试算可直接得出最终结果,计算方便;对于不同等级边坡,可选取相应的强度折减系数。工程算例表明该方法的计算结果比较合理,具有一定的工程应用价值。The problems of determining the anchorage depth in slope consolidation engineering are analyzed. The allowable lateral stress of soil layers, not the difference between the passive and the active earth pressure, should conform to the Mohr-Coulomb strength criterion. The classification of a slope project should be considered in selecting the anchorage depth. Anchorage depth is determined usually through mechanical check calculations. The calculation procedure is not only complicated but also difficult in obtaining any rational results. Based on strength reduction, a calculation formula for determining the anchorage depth of rigid anti-slide piles is rigorously derived, with the consideration of the influential factors related to the cantilever-pile method. For different classifications of slopes, corresponding strength reduction coefficients may be selected. Examples show that the calculation results are rational and useful for engineering applications.

关 键 词：边坡加固 强度折减 刚性抗滑桩 锚固深度 

分 类 号：TU473.12[建筑科学—结构工程]