地铁隧道正交穿越地裂缝的结构变形预测  

Deformation prediction of the metro tunnel orthogonally crossing ground fissures

作　　者：郝建斌[1] 门玉明[1] 李凯玲[1] 

机构地区：[1]长安大学地质工程与测绘学院,陕西西安710054

出　　处：《广西大学学报（自然科学版）》2011年第1期128-131,共4页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(40772183)

摘　　要：为研究地裂缝活动对地铁隧道的影响,以西安地铁二号线穿越地裂缝的区间隧道为对象,通过几何相似比Cl=20的物理模型试验,开展了地裂缝活动条件下地铁隧道正交穿越地裂缝时衬砌结构与围岩相互作用机制的试验。在此基础上,应用三次指数平滑法对模型试验中结构变形资料进行了预测和比较。结果表明,预测值与实测值基本吻合,说明三次指数平滑法对跨地裂缝带地铁变形预测具有一定的应用价值。In order to study the effect of ground fissures on metro tunnels,a physical model test about the tunnel of Xi＇an metro line passing through ground fissure active zones was carried out to reveal the interaction mechanism between lining and surrounding rock.The model stimulated the metro tunnel orthogonally crossing the ground fissures and being consistent with the settlement crack of lining structure,with a geometric proportion of 20∶1.The exponential smoothing method based on the model test was used for deformation prediction.The results indicate that the prediction accuracy of the cubic exponential smoothing method is excellent,and therefore it is applicable to deformation prediction of city subways.

关 键 词：指数平滑法 地铁隧道 地裂缝 变形预测 

分 类 号：U45[建筑科学—桥梁与隧道工程]