CAJ | 학술논문

某铁路隧道在下穿冲沟边坡时出现冒顶。针对该隧道工程的实际情况，建立数值分析模型，采用FLAC3D程序模拟隧道施工力学行为，考虑暴雨积水对围岩的影响，从围岩塑性区分布、位移以及锚杆和超前大管棚内力分布情况分析隧道变形和冒顶发生的原因。结果表明：隧道超浅埋、持续降水积水、围岩力学性质差及施工支护不当导致坍方。结合工程实际提出洞内加固、冲沟边坡加固及开挖控制的综合处治方法，取得了理想的效果，为日后类似工程提供借鉴与参考。
모철로수도재하천충구변파시출현모정。침대해수도공정적실제정황，건립수치분석모형，채용FLAC3D정서모의수도시공역학행위，고필폭우적수대위암적영향，종위암소성구분포、위이이급묘간화초전대관붕내력분포정황분석수도변형화모정발생적원인。결과표명：수도초천매、지속강수적수、위암역학성질차급시공지호불당도치담방。결합공정실제제출동내가고、충구변파가고급개알공제적종합처치방법，취득료이상적효과，위일후유사공정제공차감여삼고。
During undercrossing of gully side slope for a tunnel, collapse accident occurred. According to the field geological and construction conditions, this study sets up the numerical model, taking the influence of rainstorm and hydrops into account. The commercial software FLAC3D is adopted to simulate the behaviors of the tunnel and surrounding rock. Based on the results of deformations in rock and the inner forces within rock bolts and beam, the deformation of the tunnel and the causes of tunnel collapse are analyzed. The results show that: shallow tunnel, continuous rainfall, poor mechanical properties of rock and construction support landslides result in collapse. The comprehensive remedy measures consisting of reinforcement inside, slope surface grouting reinforcement and excavation control are proposed, which have achieved satisfactory results so as to offer reference for the future similar projects.