摘要
无砟轨道结构因具有优越的几何状态保证能力,有力推动了高速铁路技术的兴起和发展,是高铁安全性、高平顺性运行的关键,但由于其有限的调整能力,对轨下基础的变形控制能力提出了比较苛刻的要求。近年来,少量工点出现轨道上拱问题,影响高铁的正常运行,成为一个新的问题和难点,因此开展高铁无砟轨道路基上拱研究具有重要的工程意义。首先从高铁无砟轨道路基上拱基本情况出发,系统总结了路基上拱成因机制,明确了地基岩性、路基填料和环境因素3大类成因。其次详细介绍了轨道扣件调整法、线路调坡法等路基上拱整治技术,并总结归纳了优缺点及适用条件,提出了路基勘察、设计、施工、运维阶段有效预防上拱的对策及建议。最后,结合典型工程案例,分析了某高铁路基上拱变形原因以及整治维修策略。研究成果可为高铁路基上拱变形病害预防和整治提供技术支持。
The ballastless track structure,reknown for its superior geometric stability assurance capability,has significantly contributed to the rise and development of high-speed railway technology.It is a key factor in ensuring the safety and smooth operation of high-speed railway.However,its limited adjustment capacity imposes stringent requirements on the deformation control of the underlying foundation.In recent years,some sites have experienced track upheaval deformation,which disrupt normal high-speed railway operations and present a new technical challenge.Therefore,investigating the heaving of ballastless tracks on high-speed railway subgrades holds important engineering significance.This study begins by systematically summarizing the mechanisms behind subgrade heaving in ballastless tracks,identifying three major contributing factors:foundation lithology,subgrade fill characteristics,and environmental conditions.Next,techniques including rail fastener adjustment and track gradient adjustment methods,are thoroughly reviewed,with their advantages,disadvantages,and applicable conditions outlined.Countermeasures and suggestions for effective prevention of upward deformation in the stages of railway surveying,design,construction,and operation are proposed.Finally,combining with a typical project case of a high-speed railway,the causes of its upheaval deformation;and remediation maintenance strategies are analyzed.The results can provide technical support for the prevention and remediation of upheaval deformation;diseases of high-speed railway subgrades.
作者
孙红林
李巍
汪莹鹤
黄国良
廖昕
黄亮
SUN Hong-lin;LI Wei;WANG Ying-he;HUANG Guo-liang;LIAO Xin;HUANG Liang(China Railway Siyuan Survey and Design Group CO.,Ltd.,Wuhan,Hubei 430063,China;Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu,Sichuan 611756,China;The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science nd Technology,Wuhan,Hubei 430081,China)
出处
《岩土力学》
北大核心
2025年第S1期389-402,共14页
Rock and Soil Mechanics
基金
国家重点研发计划(No.2021YFB260040)
中铁第四勘察设计院集团有限公司科技研发课题(No.KY2023018S)
关键词
高铁
无砟轨道
路基
上拱变形
原因
防治对策
high-speed railway
ballastless track
subgrade
upheaval deformation
reason
countermeasure
作者简介
第一作者:孙红林,男,1973年生,正高级工程师,主要从事铁路勘察及路基设计方面的研究工作。E-mail:hlin_sun@sina.com;通讯作者:李巍,女,1989年生,硕士,高级工程师,主要从事铁路勘察及路基设计方面的研究工作。E-mail:005699@crfsdi.com
