CAJ | 학술논문

利用ANSYS APDL参数化有限元分析技术和生死单元技术，对西藏高海拔地区某一工程的引水隧洞施工期进行有限元仿真计算，基于岩石力学方法的围岩———结构模型对初期支护方案进行内力和变形的分析计算，同时得出了围岩开挖后的应力状态、塑性区大小和洞周变形等，从而可判断初期支护参数的选择是否合理。结果表明：①开挖初期支护后在围岩应力的作用下，发生了指向临空面的位移，最大位移发生在底板，值为4．601 mm，方向铅直向上，洞周的收敛位移都不大，围岩在施工中是稳定的；②最大应力值出现在底板两侧的边角位置，顶拱的拱铰处发生应力集中；③应力应变符合施工期隧洞工程的一般规律。
이용ANSYS APDL삼수화유한원분석기술화생사단원기술，대서장고해발지구모일공정적인수수동시공기진행유한원방진계산，기우암석역학방법적위암———결구모형대초기지호방안진행내력화변형적분석계산，동시득출료위암개알후적응력상태、소성구대소화동주변형등，종이가판단초기지호삼수적선택시부합리。결과표명：①개알초기지호후재위암응력적작용하，발생료지향림공면적위이，최대위이발생재저판，치위4．601 mm，방향연직향상，동주적수렴위이도불대，위암재시공중시은정적；②최대응력치출현재저판량측적변각위치，정공적공교처발생응력집중；③응력응변부합시공기수동공정적일반규률。
A simulation of a hydraulic tunnel during the construction period in high altitude area of Tibet has been designed with ANSYS APDL based on the parameterized finite element analysis tech-nique and the technology of "element birth and death".The stress -strain status,the deformation value ,and the distribution of plastic zone were obtained from the result of the calculation and analy-sis on the internal force and deformation of the initial supporting scheme in the structure -rock mod-el under the main theory of rock mechanics .The results provided proof to make sure the scheme if is rational.The results show that:①After initial supporting,it would produce the displacement which pointed to the empty face; the maximum vertical displacement was 4 .601 mm at the bottom of the tunnel and the ultimate convergence displacements of surrounding rock is not large .The rock was stable during the construction;②The biggest stress was at the corners of the bottom board ,and stres-ses concentration occurred on the arch hinge;③The results accorded with the general rule of stress -strain of tunnel project basically .