隧道下穿城市主干道施工变形控制技术研究  

RESEARCH ON DEFORMATION CONTROL TECHNOLOGY FOR TUNNEL UNDERCROSSING URBAN MAIN ROAD CONSTRUCTION

作　　者：梅舒杰 殷晓虎 宋战平[2,3] 邱涛 潘洪 汪阳[1] MEI Shu-jie;YIN Xiao-hu;SONG Zhan-ping;QIU Tao;PAN Hong;WANG Yang(China Seventh Bureau of Water Conservancy and Hydropower Engineering,Chengdu Hydropower Construction Engineering Co.,Ltd.,611130,Chengdu,China;School of Civil Engineering,Xi'an University of Architecture and Technology,710055,Xi'an,China;Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering,710055,Xi'an,China)

机构地区：[1]中国水利水电第七工程局成都水电建设工程有限公司,成都611130 [2]西安建筑科技大学土木工程学院,西安710055 [3]陕西省岩土与地下空间工程重点实验室,西安710055

出　　处：《建筑技术》2025年第8期971-975,共5页Architecture Technology

基　　金：国家自然科学基金资助项目(52178393);陕西省创新能力支撑计划科技创新团队计划(2020TD-005)。

摘　　要：昔格达地质条件隧道地表沉降灵敏性高,受浅埋隧道施工影响大,尤其城市主干道对沉降变形要求更为严格。为探究该地质条件下隧道施工引起的变形特性,以攀枝花阳光隧道工程为依托,采用midas GTS NX数值模拟软件建立三维模型,分析隧道开挖过程中的地层变形产生规律及特征。根据模拟结果可知:昔格达地层受扰动后会产生较大的强度衰减,且较为集中,易引起较大的不均匀沉降;隧道开挖引起的最大道路变形位于隧道拱顶正上方,并向两边辐射减小,辐射范围为78.7 m,道路最大变形为3.89 mm,满足变形设计控制值;在隧道开挖过程中,变形是逐渐积累产生的,隧道开挖整体影响范围为前方未开挖的62 m内和已开挖的81.5 m内;整体地层变形仍然满足Peck沉降槽变形规律,地层变形仍然呈现正态分布。该施工方案在阳光隧道中成功应用,表明该研究可以为隧道施工时变形控制提供理论依据。The geological conditions of Xigeda tunnels have high sensitivity to surface settlement and have been greatly affected by shallow buried tunnel construction,especially for urban main roads where settlement deformation requirements are more stringent.To explore the deformation characteristics caused by tunnel construction under this geological condition,the Panzhihua Sunshine Tunnel engineering was taken as the example support,and midas GTS NX numerical simulation software was used to establish a three-dimensional model to analyze the laws and characteristics of geological deformation during tunnel excavation.According to the simulation results,it can be concluded that the xigeda formation will experience significant intensity attenuation and concentration after being disturbed,which can easily cause significant uneven settlement.The maximum road deformation caused by tunnel excavation is located directly above the tunnel arch and radiates to both sides,with a radiation range of 78.7 m.The maximum road deformation is 3.89 mm,which meets the deformation design control value;During tunnel excavation,deformation gradually accumulates,and the overall impact range of tunnel excavation is within 62 m of the unexcavated area and 81.5 m of the already excavated area.The overall geological deformation still follows the deformation law of Peck settlement trough,and the geological deformation still shows a normal distribution.The successful application of this construction plan in the Sunshine Tunnel indicates that this study can provide theoretical basis for deformation control during tunnel construction.

关 键 词：隧道工程 数值模拟 变形特征 昔格达地层 

分 类 号：TU94[建筑科学—建筑技术科学]