CAJ | 학술논문

文章以玉山县高竹山隧道的围岩节理特征为基础，采用离散元软件UDEC建立二维计算模型，通过计算不同工况下的拱顶塌落高度值，研究了两组节理耦合工况下节理倾角、间距对隧道变形的影响。研究结果表明，随节理倾角的增大，塌落高度先增大（0°～30°时）后减小（30°～45°时）最后再增大（45°～90°时），且节理倾角为60°时塌落高度计算值与普氏理论值最为接近；当节理间距在0.2～1.0 m范围内时，随节理间距的增大塌落高度呈非线性减小；当间距接近1.0 m时，塌落高度降幅不明显；当间距不大于0.2 m时，计算值与普氏理论值最为接近。
문장이옥산현고죽산수도적위암절리특정위기출，채용리산원연건UDEC건립이유계산모형，통과계산불동공황하적공정탑락고도치，연구료량조절리우합공황하절리경각、간거대수도변형적영향。연구결과표명，수절리경각적증대，탑락고도선증대（0°～30°시）후감소（30°～45°시）최후재증대（45°～90°시），차절리경각위60°시탑락고도계산치여보씨이론치최위접근；당절리간거재0.2～1.0 m범위내시，수절리간거적증대탑락고도정비선성감소；당간거접근1.0 m시，탑락고도강폭불명현；당간거불대우0.2 m시，계산치여보씨이론치최위접근。
Based on the rock joint characteristics of the Gaozhushan tunnel in Yushan county, a 2D calculation model is established using the discrete element software UDEC, and the effects of the joint dip angle and joint spacing on tunnel deformation under two sets of joint couplings is studied by calculating the vault collapse heights in different conditions. Results show that by increasing the joint dip angle, the collapse height decreases (30° to 45°) after initially increasing (0° to 30°), and then increases again (45° to 90°); the calculated collapse height is closest to PU's theoretical value when the dip angle is 60°; and with an increase in joint spacing, the collapse height decreases nonlinearly. When the joint spacing is 0.2~1.0 m, the collapse height can be calculated with equation (1) and the calculated value is closest to PU's theoretical value when spacing is no more than 0.2m.