CAJ | 학술논문

研究目的：铁路隧道底部是列车运营的承载结构，其质量缺陷极易诱发运营隧道发生底鼓、翻浆冒泥、无砟轨道道床板开裂等病害，从而严重干扰运输，影响行车安全，经济损失很大。因此研究评定铁路隧道底部混凝土质量缺陷等级和处理方案十分必要。研究结论：（1）隧道底部质量缺陷根本原因是现场管理薄弱，因此必须加强管理，加强检查与监督，避免隧道底部质量缺陷的发生；（2）采用缺陷面积比和缺陷厚度比评定铁路隧道底部结构质量缺陷等级，评定结果可分为轻微、较严重、严重、很严重、极严重5个级别；（3）针对不同的缺陷可对应采取注浆、注浆＋锚杆、拆除重做的处理方案，采取拆换重做时，按小于衬砌台车长度3 m 作为一次拆除长度单元，经有限元模拟计算和现场应用，对围岩、初期支护和二次衬砌影响不大，是安全的；（4）该研究成果可供铁路隧道底部混凝土质量缺陷等级评定和处理参考。
연구목적：철로수도저부시열차운영적승재결구，기질량결함겁역유발운영수도발생저고、번장모니、무사궤도도상판개렬등병해，종이엄중간우운수，영향행차안전，경제손실흔대。인차연구평정철로수도저부혼응토질량결함등급화처리방안십분필요。연구결론：（1）수도저부질량결함근본원인시현장관리박약，인차필수가강관리，가강검사여감독，피면수도저부질량결함적발생；（2）채용결함면적비화결함후도비평정철로수도저부결구질량결함등급，평정결과가분위경미、교엄중、엄중、흔엄중、겁엄중5개급별；（3）침대불동적결함가대응채취주장、주장＋묘간、탁제중주적처리방안，채취탁환중주시，안소우츤체태차장도3 m 작위일차탁제장도단원，경유한원모의계산화현장응용，대위암、초기지호화이차츤체영향불대，시안전적；（4）해연구성과가공철로수도저부혼응토질량결함등급평정화처리삼고。
Research purposes:The bottom of railway tunnel is the bearing structure of train operation,quality defects easily induce operating tunnel floor heave,mud pumping,cracking and other diseases,thus seriously interfere with the transport,affect driving safety,economic loss is very large.So the evaluation of the hierarchy and treatment scheme of concrete quality defects at the bottom of railway tunnel is necessary. Research conclusions:(1 )The root cause of quality defects at the bottom of tunnel is the weak site management, therefore,must strengthen management,and strengthen inspection and supervision,to avoid thequality defects at the bottom of the tunnel.(2)The defect area ratio and the defect thickness ratio are used to evaluate structure defects at the bottom of railway tunnel,the results of the evaluation can be divided into five levels:slight,more serious,serious,very serious and extremely serious.(3 ) According to different defect,the corresponding processing schemes such as grouting,grouting +anchor,dismantlement and redoing can be adopted.Taking the dismantlement and redoing,less than lining shutter length 3 m as a dismantled length unit,by the finite element numerical simulation and field application,has little influence on surrounding rock,initial support and secondary lining,and is safe.(4)The research results can be used for quality rating and processing of railway tunnel concrete.