考虑陡坡效应的横向受荷桩受力分析纽玛克解答

发布时间：2019-05-11 15:53

【摘要】：首先,分析了陡坡效应的形成机理以及陡坡段横向受荷桩的受力特性。其次,基于Winkler弹性地基梁理论,通过对桩周横向荷载及岩土体抗力的合理简化,建立了考虑陡坡效应的横向受荷桩简化受力模型。然后,将桩身划分为若干段,将桩周荷载及岩土体抗力等效为节点荷载,分别积分计算出各节点的弹簧刚度系数,进而利用纽玛克数值计算方法进行递推运算得到桩身内力与位移。最后,以某实际工程为例进行对比分析发现:桩身最大弯矩及水平位移最大误差均不足5%,验证了纽玛克数值计算方法及程序是合理可行的,且考虑陡坡效应后的计算结果偏大,对工程安全性有利。
[Abstract]:Firstly, the formation mechanism of steep slope effect and the stress characteristics of transverse loaded pile in steep slope section are analyzed. Secondly, based on Winkler elastic foundation beam theory, a simplified stress model of transverse loaded pile considering steep slope effect is established by reasonably simplifying the transverse load around pile and the resistance of rock and soil. Then, the pile body is divided into several sections, and the load around the pile and the resistance of rock and soil are equivalent to the node load, and the spring stiffness coefficients of each joint are calculated by integral. Then the internal force and displacement of the pile body are obtained by using the Neumak numerical calculation method to calculate the internal force and displacement of the pile body. Finally, taking a practical project as an example, it is found that the maximum bending moment and the maximum error of horizontal displacement of pile body are less than 5%, which verifies that the Neumak numerical calculation method and program are reasonable and feasible. Considering the steep slope effect, the calculation results are too large, which is beneficial to the safety of the project.
【作者单位】：湖南大学岩土工程研究所;长沙理工大学土木与建筑学院;中南大学资源与安全工程学院;
【基金】：国家自然科学基金项目(51278187) 交通运输部西部交通建设科技项目(200831878531) 湖南省交通科技计划项目(200904)
【分类号】：U443.15

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