铁道标准设计2026，Vol.70Issue(7)：56-63,8.DOI:10.13238/j.issn.1004-2954.202408230003
地基系数比例系数m的计算方法研究
Research on Calculation Method of Proportional Coefficient m of Foundation Coefficient
摘要
Abstract
[Objective]The m-method is the most commonly used method for calculating and analyzing the internal force and deformation of pile foundations in China's railway,highway,and construction industries.At present,the relevant specifications only provide the range of the parameter m,and the specific value in design is selected based on experience,which is subjective and leads to large variations in the m-value.However,there are few studies on the theoretical analysis and calculation method of the m-value.[Methods]To investigate the theoretical calculation method of the m-value,based on the mechanical principle of the m-method for lateral soil resistance and the passive earth pressure model considering displacement,a theoretical formula that could directly calculate the m-value using shear strength parameters and deformation was established.The detailed calculation steps and procedure of the method were provided,and a calculation program was developed to achieve rapid calculation.The proposed theoretical formula for the m-value was verified and analyzed using the engineering cases of single-pile horizontal static load tests on the Yinfeng Grand Bridge of the Jinyong Railway and the Changshawan Grand Bridge of the Xiamen-Shenzhen railway.[Results]The results showed that the m-value of the Yinfeng Grand Bridge project on the Jinyong railway,calculated by the theoretical formula derived in this study,was 6 580.63 kN/m4,which was very close to the measured value 6 416 kN/m4,with a relative error of only 0.59%.The m-value obtained for the Changshawan Grand Bridge project on the Xiamen-Shenzhen railway was 4 090.60 kN/m4,which was within the range of measured on-site values(3 880～5 620 kN/m4)and was relatively conservative.[Conclusion]The proposed calculation method for the m-value can well predict the m-value of soil within the main influence range of horizontally loaded piles.关键词
桥梁桩基/地基系数的比例系数(m值)/朗肯被动土压力/抗剪强度参数/容许水平位移Key words
bridge pile foundations/proportional coefficient of foundation coefficient(m-value)/Rankine passive earth pressure/shear strength parameters/allowable horizontal displacement分类
交通工程引用本文复制引用
史钦华,邓煜晨,冷伍明,杨奇,何阳铭..地基系数比例系数m的计算方法研究[J].铁道标准设计,2026,70(7):56-63,8.基金项目
国家自然科学基金项目(51978672) （51978672）
中国铁路上海局集团有限公司杭州铁路枢纽指挥部横向科研课题(2021-47,122) （2021-47,122）
