铁路螺纹桩单桩竖向极限承载力计算模型的优化  

Optimization of the Calculation Model for Vertical Ultimate Bearing Capacity of Railway Screw Pile Single Pile

作　　者：佘志亮 SHE Zhiliang(China Railway 18th Bureau Group No.4 Engineering Co.,Ltd.,Tianjin 300350,China)

机构地区：[1]中铁十八局集团第四工程有限公司,天津300350

出　　处：《佳木斯大学学报(自然科学版)》2025年第1期109-112,共4页Journal of Jiamusi University:Natural Science Edition

摘　　要：铁路路基作为铁路基础设施的核心组成,其建设的稳定性和安全性至关重要。然而,目前螺纹桩单桩竖向极限承载力的计算模型存在计算精度不足的问题。为此,研究首先通过对桩身受力的深入分析,然后针对不同螺距的螺纹间土体侧摩阻力差异,对计算方法进行改进。在极限承载力的试验中,当上覆荷载为30kPa时,传统计算模型的计算误差为18.48%,改良计算模型的误差为1.05%,验证了研究的有效性。研究为提升铁路软土地基的稳定性和安全性提供了参考方案。As the core component of railway infrastructure,the stability and safety of railway subgrade construction are very important.However,the current calculation model of vertical ultimate bearing capacity of single threaded pile has the problem of insufficient calculation accuracy.Therefore,firstly,through the in-depth analysis of pile stress,and then aiming at the difference of soil friction between threads with different pitches,the calculation method is improved.In the ultimate bearing capacity test,when the overlying load is 30kPa,the calculation error of the traditional calculation model is 18.48%,and the error of the improved calculation model is 1.05%,which verifies the effectiveness of the study.The research provides a reference scheme for improving the stability and safety of railway soft soil foundation.

关 键 词：铁路 螺纹桩 极限承载力 计算模型 

分 类 号：TU470[建筑科学—结构工程]