大断面黄土隧道施工变形控制技术研究  

RESEARCH ON DEFORMATION CONTROL TECHNOLOGY OF LARGE SECTION LOESS TUNNEL CONSTRUCTION

作　　者：房小龙 Fang Xiao-long

机构地区：[1]中铁二十局集团第二工程有限公司,西安072100

出　　处：《建筑技术开发》2024年第6期115-118,共4页Building Technology Development

基　　金：中国国家铁路集团有限公司科技研究开发计划系统性重大项目(P2018G048)。

摘　　要：常规的黄土隧道施工变形控制技术主要使用单点临时仰拱法控制隧道开挖步距,易受隧道断面含水量变化影响使得隧道拱顶变形沉降过高,故设计一种新的大断面黄土隧道施工变形控制技术。首先开挖大断面黄土隧道施工导坑,再支护大断面黄土隧道施工钢拱架,最后注浆加固隧道围岩,从而实现大断面黄土隧道施工变形控制。实例分析结果表明:使用设计的大断面黄土隧道施工变形控制技术展开施工后,各个隧道监测点的拱顶变形沉降较低,能够满足大断面黄土隧道施工变形控制要求。The conventional deformation control technology for loess tunnel construction mainly uses the single point temporary inverted arch method to control the excavation step distance of the tunnel,which is easily affected by changes in the water content of the tunnel section,resulting in excessive deformation and settlement of the tunnel arch.Therefore,a new deformation control technology for large cross-section loess tunnel construction is designed.Firstly,excavate the construction guide hole of the large cross-section loess tunnel,then support the steel arch frame of the large cross-section loess tunnel construction,and finally grout and reinforce the surrounding rock of the tunnel to achieve deformation control during the construction of the large cross-section loess tunnel.The example analysis results show that after using the designed deformation control technology for large cross-section loess tunnel construction,the deformation settlement of the arch at each monitoring point of the tunnel is relatively low,which can meet the deformation control requirements for large cross-section loess tunnel construction.

关 键 词：大断面 黄土地质 隧道施工 变形控制 

分 类 号：U455.1[建筑科学—桥梁与隧道工程]