CAJ | 학술논문

对于复合式衬砌隧道，初支受力最危险的时期就是为保证二次衬砌的完整性而分段拆除临时支撑的阶段。依托青岛地铁某暗挖车站，采用现场实测数据分析和数值模拟相结合的方法，对比拆撑前后围岩与初支变形情况，进而对6 m 范围内交替拆撑，并以6 m 为工作单元间隔拆撑的拆撑方案安全性进行分析。实测数据表明，地表沉降、拱顶沉降及净空收敛在拆撑前后增长量及影响均较小，数值计算结果与实测数据吻合较好，可知初支的安全性受支撑拆除的影响较小。研究结论为实现信息化施工提供了依据，也为今后类似工程积累了相关经验。
대우복합식츤체수도，초지수력최위험적시기취시위보증이차츤체적완정성이분단탁제림시지탱적계단。의탁청도지철모암알차참，채용현장실측수거분석화수치모의상결합적방법，대비탁탱전후위암여초지변형정황，진이대6 m 범위내교체탁탱，병이6 m 위공작단원간격탁탱적탁탱방안안전성진행분석。실측수거표명，지표침강、공정침강급정공수렴재탁탱전후증장량급영향균교소，수치계산결과여실측수거문합교호，가지초지적안전성수지탱탁제적영향교소。연구결론위실현신식화시공제공료의거，야위금후유사공정적루료상관경험。
For composite lining tunnel, initial liner is the most dangerous when temporary supports are dismantled before construction of second-layer liner. A project example of Qingdao metro is introduced. Using in-situ monitoring and numerical simulation, this paper contrasted deformation of rock and initial liner before and after dismantling temporary supports. Security of dismantling temporary supports is analyzed. Measured data show that volume growth and growth rate of displacement are small. Displacement results of numerical simulation are well consistent with measured data. The results show that the security of initial liner is little influenced by dismantling temporary supports. As a result, this study provides evidence for information-oriented construction of tunnel as well as experience for the future related projects.