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目前关于h型抗滑桩的结构计算尚无成熟的模型和方法。提出基于有限差分法的h型抗滑桩结构计算模型,把h型桩分成滑动面以下和以上两部分分别建立差分方程,以边界条件为基础,推演出适用于h型抗滑桩计算的有限差分方程组,并进行计算分析。同时,进行h型抗滑桩大型结构模型试验,验证对比了有效差分分析方法。结果表明:采用有限差分法得到的h型抗滑桩关键点的位移和应力数据与结构模型试验结果基本吻合,说明采用有限差分求解h型抗滑桩的位移、应力等桩身参数具有较高的准确性和可靠度;h型抗滑桩前、后排桩的桩身应力均呈交变状态,有效降低了桩的最大应力值,克服了传统单排桩桩身应力过于集中的问题;h型抗滑桩前排桩和后排桩在同一高度上的桩身位移基本相等,具有较优的结构协同工作能力。
At present there is no mature model and method for structural calculation of h-type anti-slide pile. The calculation model of h-type anti-slide pile based on finite difference method is proposed. H-type pile is divided into two parts below and below the sliding surface to establish the difference equation. Based on the boundary conditions, the finite Difference equations, and calculation and analysis. At the same time, large-scale structural model test of h-type anti-slide pile is carried out, and the effective differential analysis method is verified. The results show that the displacement and stress data of the key points of the h-type anti-slide pile obtained by the finite difference method are in good agreement with the results of the structural model test. The results show that the displacement and stress of the h-type anti-slide pile using finite difference method have higher The accuracy and reliability of the pile of h-type anti-slide pile are different, the stress of pile body in both front and rear piles is in an alternating state, which effectively reduces the maximum stress of the pile and overcomes the problem of stress concentration in traditional pile- h-type anti-slide pile front row of piles and back piles at the same height of the pile displacement is basically the same, with better ability to work together.