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郑州地铁浅埋暗挖通道施工引起的沉降分析

发布时间:2018-05-19 20:49

  本文选题:CRD法 + 小导管注浆 ; 参考:《河南理工大学学报(自然科学版)》2017年05期


【摘要】:为研究郑州地铁浅埋暗挖通道引起的沉降特性,选取郑州地铁1号线新郑州大学站1,2号出入口通道为研究对象,运用FLAC3D软件模拟了CRD法浅埋暗挖通道施工过程,并与实测沉降数据进行了对比分析。研究表明:对于某一横断面测线,采用小导管超前注浆后的地表最大沉降比未进行小导管注浆时减小32.8%,小导管超前注浆能明显减小地表沉降,是CRD法浅埋暗挖通道的有效辅助措施;浅埋暗挖施工过程中进行了地表沉降监测,所有测点的最大实测沉降和速率均满足相关规范要求。目前1,2号出入口通道的二衬已经施工完成,最大沉降和沉降速率均保持稳定,说明郑州地铁出入口通道施工采用CRD浅埋暗挖法小导管注浆是可行的,为今后类似工程提供参考依据。
[Abstract]:In order to study the settlement characteristics caused by shallow burying tunnel in Zhengzhou Metro, the construction process of CRD shallow tunneling tunnel is simulated by using FLAC3D software, and the entrance and exit passage of Zhengzhou University Station No. 1 of Zhengzhou Metro Line 1 is selected as the research object. The results are compared with the measured settlement data. The results show that for a cross section, the maximum surface subsidence of a small pipe after advanced grouting is reduced by 32. 8% than that without small pipe grouting, and the surface settlement can be significantly reduced by small pipe advance grouting. It is an effective auxiliary measure for shallow buried tunnel of CRD method, and the surface subsidence monitoring is carried out during the construction of shallow underground excavation, and the maximum measured settlement and rate of all measured points meet the requirements of relevant codes. At present, the second lining of entrance and exit channel 1 and 2 has been completed, and the maximum settlement and settlement rate are stable. It is feasible to use CRD shallow burying tunneling method in the construction of Zhengzhou subway entrance and exit tunnel. To provide reference for similar projects in the future.
【作者单位】: 中铁十六局集团有限公司;
【基金】:河南省科技攻关项目(162102210019)
【分类号】:P642.26;U231.3

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