CAJ | 학술논문

基于FLAC3D软件，采用数值模拟的方法，对在不同夹层土体厚度及不同峰值加速度情况下，交叉隧道的地震动力响应进行研究，得出了交叉隧道结构的地震动力响应规律。结果表明：上层隧道的相对水平位移差明显大于下层隧道的相对水平位移差。上层隧道地震应力反应大于下层隧道的地震应力反应。随着夹层土体厚度的增大，衬砌结构的加速度、位移和应力略有变化但总体变化不大，并得出0．5D～2D（D为隧道外径）的厚度为较理想的夹层土体厚度，此时加速度、位移和应力总体较其它偏于安全。此结论为穿越既有隧道的交叉隧道工程选线和穿越深度提供重要的理论参考依据。
기우FLAC3D연건，채용수치모의적방법，대재불동협층토체후도급불동봉치가속도정황하，교차수도적지진동력향응진행연구，득출료교차수도결구적지진동력향응규률。결과표명：상층수도적상대수평위이차명현대우하층수도적상대수평위이차。상층수도지진응력반응대우하층수도적지진응력반응。수착협층토체후도적증대，츤체결구적가속도、위이화응력략유변화단총체변화불대，병득출0．5D～2D（D위수도외경）적후도위교이상적협층토체후도，차시가속도、위이화응력총체교기타편우안전。차결론위천월기유수도적교차수도공정선선화천월심도제공중요적이론삼고의거。
Based on the FLAC3D, with numerical simulation method, analysis intersecting tunnels structure under different soil thickness dynamic responses and different peak accelerations, we obtained dynamic response rules of intersecting tunnels. The results showed that, the upper tunnel relative horizontal displacement difference is significantly greater than the lower tunnel relative horizontal displacement difference. With the increasing of interlayer soil thickness, the acceleration, displacement and stress of structure change slightly, but overall less variation. And O. 5 D -2 D (D represents tunnel outside diameter) thickness is ideal soil thickness, the acceleration, displacement and stress are safer than others. This conclusion provides an important theoretical reference for crossing existing tunnel engineering with selecting route and the depth.