CAJ | 학술논문

以南水北调中线某双洞线输水隧洞为例，利用 ANSYS有限元软件，建立其地下输水隧洞洞室的整体三维非线性有限元计算模型，选取不同洞间距进行三维整体仿真分析，对洞周围岩稳定性作出初步判定，并对输水隧洞洞间距进行了优选，确定了输水隧洞的合理间距。结果表明：输水隧洞地下洞室围岩的整体稳定性较好，两洞间岩体厚度取19 m较为合理，此时洞身各个方向的最大应力值都小于 C30混凝土的轴心抗压设计值，最大位移相对较小，且在控制范围内，洞身的构造设计满足安全要求。
이남수북조중선모쌍동선수수수동위례，이용 ANSYS유한원연건，건립기지하수수수동동실적정체삼유비선성유한원계산모형，선취불동동간거진행삼유정체방진분석，대동주위암은정성작출초보판정，병대수수수동동간거진행료우선，학정료수수수동적합리간거。결과표명：수수수동지하동실위암적정체은정성교호，량동간암체후도취19 m교위합리，차시동신각개방향적최대응력치도소우 C30혼응토적축심항압설계치，최대위이상대교소，차재공제범위내，동신적구조설계만족안전요구。
The present study focuses on the twin water-conveyance tunnel in South-to-North Water Transfer Project. The nonlinear three-dimensional finite element calculation model of the underground twin water-conveyance tunnel was established by ANSYS integral three-dimensional finite element simulations of conclusions on different distance of the twin tunnel were analyzed,the stability of underground water-conveyance tunnel′s surrounding rock was guaranteed and the reasonable distance of the twin water-conveyance tunnel was optimized so as to demonstrate the reasonableness of the tunnel design and achieve the demands of the safety and economies of the construction. The results show that the overall surrounding rock of the water-conveyance tunnel is proved stable,choosing 19 m as the distance of the twin water-conveyance tunnel is identified reasonable,under which condition the maximum stress value of each direction on the tunnel is less than axial compressive design value of concrete C30 and the maximum displacement is relatively small,the structural design also meet the safety requirements.