中国铁道科学2025，Vol.46Issue(6)：12-18,7.DOI:10.3969/j.issn.1001-4632.2025.06.02
基于能量原理的泥岩膨胀变形计算方法及试验验证
Calculation Method and Experimental Verification of Mudstone Swelling Deformation Based on the Energy Principle
摘要
Abstract
Due to the dense structure and low permeability of mudstone,its water absorption and swelling process is slow.Existing methods are difficult to accurately evaluate the laws of its swelling deformation within a short time frame,making high-speed railway lines susceptible to track uplift deformation defects caused by mudstone foundations during operation,threatening train operational safety.Based on the energy principle,this study analyzes the energy conversion law during the water absorption and swelling process of mudstone,proposes a calculation method for swelling deformation,and conducts laboratory tests to verify its effectiveness.The results indicate that the potential swelling energy released by mudstone upon water contact is preferentially consumed by internal structural damage,and the residual energy then performs external work to induce deformation.The calculated values of rock block expansion strain obtained by the proposed method agree well with the experimental values,with a maximum error of 0.03,meeting the calculation accuracy requirements.The research results provide theoretical support for deformation prediction of mudstone foundations in high-speed railways.关键词
高速铁路/地基/泥岩/能量原理/膨胀变形Key words
High-speed railway/Foundation/Mudstone/Energy principle/Swelling deformation分类
交通工程引用本文复制引用
刘景宇,王鹏程,李宜霖,陈正军,张千里..基于能量原理的泥岩膨胀变形计算方法及试验验证[J].中国铁道科学,2025,46(6):12-18,7.基金项目
国家重点研发计划项目(2022YFB2603305) （2022YFB2603305）
中国铁道科学研究院集团有限公司院基金课题(2023YJ226) （2023YJ226）
