CAJ | 학술논문

文章运用有限元方法建立了高速铁路立体交叉隧道数值计算模型，分析了高速列车振动荷载下交叉隧道结构的动力响应特性，探讨了围岩级别、行车速度、列车通车方式、隧道交叉角度以及岩柱高度等参数对下穿隧道衬砌结构动力响应变化规律的影响。研究结果表明：围岩级别、行车速度及列车通车方式对下穿隧道动应力响应影响较大；下穿隧道衬砌结构的竖向位移、竖向加速度、第一主应力及第三主应力随着围岩级别提高、行车速度增加、行车方式改变而增大，随着岩柱高度增加而减小；随着交叉角度增加，衬砌结构变形、加速度及第三主应力峰值有所减小，但第一主应力峰值增加，这对于抗压强度大于抗拉强度的混凝土结构是不利的。
문장운용유한원방법건립료고속철로입체교차수도수치계산모형，분석료고속열차진동하재하교차수도결구적동력향응특성，탐토료위암급별、행차속도、열차통차방식、수도교차각도이급암주고도등삼수대하천수도츤체결구동력향응변화규률적영향。연구결과표명：위암급별、행차속도급열차통차방식대하천수도동응력향응영향교대；하천수도츤체결구적수향위이、수향가속도、제일주응력급제삼주응력수착위암급별제고、행차속도증가、행차방식개변이증대，수착암주고도증가이감소；수착교차각도증가，츤체결구변형、가속도급제삼주응력봉치유소감소，단제일주응력봉치증가，저대우항압강도대우항랍강도적혼응토결구시불리적。
Numerical analysis models of high-speed railway crossing tunnels were established by u-sing finite element method ,and the characteristics of the dynamic response of crossing tunnel struc-ture under high-speed train vibratory load were studied .The influence of some factors on the dynamic response of undercrossing tunnel structure with train vibration was analyzed ,such as surrounding rock classification ,train speed ,train passing method ,cross angle and rock height between the two tunnels .T he result show s that surrounding rock classification ,train speed ,and train passing method have greater influence than cross angle and rock height .Vertical displacement ,vertical acceleration , the first main stress and the third main stress of structure increase with the improvement of the level of surrounding rock ,the increase of running speed and the change of passing method of train ,and de-crease with the increase of rock height .With the increase of crossing angle ,the lining deformation , the acceleration and the third main stress decrease ,w hile the first main stress increases ,w hich is un-favorable for concrete structure with tensile strength far less than compressive strength .