桩(墙)单位侧摩阻力与轴向应变关系的解析解及其应用

根据弹性力学原理，提出了模型筒桩（闭合墙）的简化力学模型。采用半逆解法先求出桩左右侧受均布摩阻力、桩顶受均布荷载两种情况下的应力分量，根据叠加原理得出桩两侧均受相同摩阻力、桩顶受均布荷载情况下的应力分量。据此推导了普通桩基的轴力和侧摩阻力计算式，分析结果表明，该计算式与传统计算方法是一致的。当桩壁两侧受不同大小的侧摩阻力、桩顶受均布荷载时，仍采用叠加原理求得各应力分量，进而求得桩表面处的轴向应变与单位侧摩阻力关系的解析解。通过矩形闭合墙基础模型试验实例，对该解析解的应用方法加以说明。该解析解的求出，为竖向载荷试验中模型筒桩（闭合墙）所量测的内外侧应变进行数据处理提供了理论依据，进而为基础一土相互作用研究提供了真实、准确的试验结果。

Analytical solution for relationship between unit shaft resistance and axial strain of piles or closed diaphragm wall and its application

Simplified mechanical model of tubular pile or closed diaphragm wall is proposed base on elasticity mechanics.The stress components of piles in two load conditions are solved by semi-inverse method at first.One load condition is that uniform vertical shear stress acted on the left and right sides of pile shaft,another is uniform vertical shear stress acted on the pile top.According to superposition principle,the stress components of the pile with unit shaft resistance on both side and vertical load on the h...