CAJ | 학술논문

研究高温隧洞在温度稳定时，达到热平衡条件下的温度场及其引起的温度应力与隧洞自重应力的耦合分布形式。通过应用弹性力学中无限长圆筒对称温度应力的解析解与有限差分软件对温度场的分析，得出温度场及隧洞径向应力σρ、环向应力σφ和轴向应力σz 的分布形式，表明在变温区，径向应力σρ呈先增大后减小趋势，环向应力σφ沿着洞径方向由拉应力变化为压应力，轴向应力σz沿着洞径方向为压应力增大。模拟温度应力与自重应力耦合作用下在隧洞水平边墙和洞室顶部的应力分布规律。表明在两个不同位置处的耦合应力分布明显不同，环向应力σφ在水平边墙处为压应力，且逐渐增大后趋于稳定，而在隧洞顶拱处为拉应力，逐渐变为稳定温度区的压应力。隧洞洞顶拱处的混凝土衬砌在耦合应力作用下处于拉应力状态，在环向拉应力作用下极易产生裂缝。
연구고온수동재온도은정시，체도열평형조건하적온도장급기인기적온도응력여수동자중응력적우합분포형식。통과응용탄성역학중무한장원통대칭온도응력적해석해여유한차분연건대온도장적분석，득출온도장급수동경향응력σρ、배향응력σφ화축향응력σz 적분포형식，표명재변온구，경향응력σρ정선증대후감소추세，배향응력σφ연착동경방향유랍응력변화위압응력，축향응력σz연착동경방향위압응력증대。모의온도응력여자중응력우합작용하재수동수평변장화동실정부적응력분포규률。표명재량개불동위치처적우합응력분포명현불동，배향응력σφ재수평변장처위압응력，차축점증대후추우은정，이재수동정공처위랍응력，축점변위은정온도구적압응력。수동동정공처적혼응토츤체재우합응력작용하처우랍응력상태，재배향랍응력작용하겁역산생렬봉。
This research focuses on the coupling distribution of temperature stress caused by temperature field and tunnel gravity stress under the thermal equilibrium condition when the temperature in the high temperature tunnel reaches plateau and stabilizes .The distribution of the radial stress ,circular stress and axial stress of the temperature field and the tunnel were obtained through the infinite long cylindrical symmetry temperature stress analytical solutions based on elastic me-chanics and the analysis of temperature field by finite difference software .The results showed that in the temperature vari-ation zone ,the radial stress first increased and then decreased ,the circular stress changed from tensile stress to compres-sive stress towards the direction of the tunnel ,axial stress posed as the increasing compressive stress along the direction of the tunnel .And then the stress distribution of the level tunnel wall and the ceiling under the coupling action of tempera-ture stress and gravity stress was simulated .It was found that the coupling stress distribution at the two different locations were totally different .The circular stress presented as compressive stress at the level wall ,and it increased then stabi-lized ,while at the arch of the ceiling it presented as tensile stress and then changed gradually into compressive stress at the stable temperature zone .Under the coupling stress ,the concrete lining at the ceiling arch was under tensile stress ,it would crack easily when under circular tensile stress .This analysis has some referential significance to the practical engi-neering .