小间距双线隧道CRD法零距离下穿既有营运车站变形影响研究

发布时间：2018-05-31 14:10

本文选题：双线隧道 + CRD法　；参考：《铁道标准设计》2017年11期

【摘要】：以深圳地铁7号线皇岗村站至福民站的新建小间距双线平顶隧道施工区间工程为例,研究采用"CRD法+直墙暗挖"进行零距离下穿既有4号线福民站,对其结构变形影响及现场监测结果分析。通过对新建双线隧道施工全过程的精细化数值仿真模拟,揭示既有营运车站的变形规律,为施工过程中结构变形发展预测和设计方案实时调整提供理论支撑。结合施工过程实时监测资料,论证新建隧道下穿施工对既有车站的影响程度,验证当前设计方案的可行性。结果表明,数值仿真分析的既有车站变形规律与实际监测结果一致,且最大变形量均小于控制值10.0 mm。
[Abstract]:Taking the construction section of the small spaced double-line flat-top tunnel from Huanggang Village Station of Shenzhen Metro Line 7 to Fumin Station as an example, this paper studies the use of "CRD method to dig the straight wall" through the existing Fumin Station on Line 4 at zero distance. The effect of structural deformation and field monitoring results are analyzed. Through the detailed numerical simulation of the whole construction process of the new double-track tunnel, the deformation law of the existing operating station is revealed, which provides theoretical support for the prediction of the structural deformation development and the real-time adjustment of the design scheme during the construction process. Based on the real-time monitoring data of the construction process, the influence of the underpass construction of the new tunnel on the existing stations is demonstrated, and the feasibility of the current design scheme is verified. The results show that the numerical simulation results are consistent with the actual monitoring results, and the maximum deformation is less than the control value of 10.0 mm.
【作者单位】：中国水利水电第十四工程局有限公司;天津大学水利工程仿真与安全国家重点实验室;天津大学建筑工程学院;
【分类号】：U231.3;U456.3

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