作者：张文龙

第一作者单位：中铁十六局集团有限公司

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 characteristics of subsidence caused by the construction of shallow buried tunnel construction in subway of Zhengzhou, the 1^stand 2^ndentrance tunnels in new Zhengzhou university station of No.1 subway line are taken as examples.The construction process of shallow access tunnel construction by using CRD method are simulated with FLAC^3Dsoftware.The simulated results are compared with the in-situ monitored data.The results show that for the same cross-sectional testing line, the maximum ground surface settlement with small pipe grouting construction can be reduced about 32.8% compare with those without small pipe grouting construction.Small pipe grouting construction can reduce the ground surface subsidence significantly and is an effective auxiliary measure for CRD method.The ground surface subsidence are monitored and tested during the construction of shallow buried tunnel.All the tested value and ratio of subsidence meet with the requirements of the relevant regulations.Currently the linings of these two access passage tunnels are constructed.The value and the ratio of the subsidence all turn to be constant.CRD with small pipe grouting is proved be feasible for the shallow buried tunnel construction in Zhengzhou subway, which can provide references for the similar engineering.

基金：河南省科技攻关项目(162102210019)；

关键词：CRD法;小导管注浆;浅埋暗挖;地表沉降;

DOI：10.16186/j.cnki.1673-9787.2017.05.021

分类号：P642.26;U231.3