论文部分内容阅读
为了分析邻近堆载作用下或失稳土坡中被动桩的力学特性,根据桩土侧向相互作用机理,将被动桩划分为自由段、被动段和主动段.将土体侧移作用下桩身附加被动荷载的分布模式假定为二次函数,基于Euler-Bernouli梁理论和Winkler地基模型,提出了土体侧移作用下被动桩的通用简化计算模型.然后,分别建立了各桩段的微分控制方程组,结合桩段界面连续条件和桩顶、桩底边界条件,求得桩身响应的解析解.最后,通过算例分析验证了该解析解的可靠性,并对被动桩受力响应的主要影响因素进行了分析.结果表明,随着土体侧向位移作用于桩身被动侧荷载水平的增大和地基土抗力的下降,桩身弯矩和水平位移逐渐增大.
In order to analyze the mechanical properties of passive piles under adjacent loading or unstable soil slope, according to the lateral interaction mechanism of pile-soil, the passive piles are divided into free, passive and active sections. Based on the Euler-Bernouli beam theory and the Winkler foundation model, a generalized simplified calculation model of passive pile under lateral displacement of soil is proposed. Then, the differential Control equations and the continuous conditions of the interface of piles and the boundary conditions of pile top and bottom of piles are obtained to obtain the analytical solution of pile response.Finally, the reliability of the analytical solution is verified by an example analysis. The main influencing factors are analyzed.The results show that the bending moment and horizontal displacement of pile body increase with the increase of lateral load on the passive side of the pile and the decrease of the resistance of foundation soil.