三维应力状态超宽隧道结构开洞力学行为研究  

Study on Mechanical Behavior of Super Wide Tunnel Structure under Three-dimensional Stress State

作　　者：谭海星 刘罡[1] 韩嘉玮 关少钰 TAN Haixing;LIU Gang;HAN Jiawei;GUAN Shaoyu(CCCC First Highway Consultants Co.,Ltd.,Xi'an Shaanxi 710075,China)

机构地区：[1]中交第一公路勘察设计研究院有限公司,陕西西安710075

出　　处：《交通节能与环保》2023年第6期76-83,共8页Transport Energy Conservation & Environmental Protection

基　　金：科技创新基金项目(KCJJ2020-19)。

摘　　要：城市明挖隧道采用框架式结构,隧道应城市功能需求,需在边墙侧开设预留洞口,如泵房、设备区、逃生通道口等,这些预留洞口的存在势必对隧道结构自身的应力状态产生影响。本文以石家庄白佛双十超宽隧道为例,在土压、水压以及周边环境所形成的三维应力状态条件下,选取两种不同开洞位置作为研究对象,在洞口尺寸条件一定的情况下,对隧道侧墙结构受力特性的改变做了分析研究,得出不同结构开洞环境下隧道的受力状态及变化情况,并在竖向和水平两种不同变化条件下得出结构的较大和较小应力集中区域,从而在设计和施工针对应力集中或荷载较大位置进行精细化处理,以保证结构的使用年限和使用功能。Urban open-cut tunnel adopts frame structure,and the tunnel need to be set up on the side wall with reserved openings,such as pump room,equipment area,escape passageway,etc.The existence of these reserved openings is bound to affect the stress state of the tunnel structure itself.Taking the Baifo Double-ten ultra-wide tunnel in Shijiazhuang as an example,under the condition of three-dimensional stress state formed by soil pressure,water pressure and surrounding environment,this paper selects two different opening positions as research objects,analyzes and studies the changes of stress characteristics of the tunnel side wall structure under certain opening size conditions,and obtains the stress state and changes of the tunnel under different opening conditions.The large and small stress concentration areas of the structure are obtained under the different conditions of vertical and horizontal changes,so that the design and construction of the stress concentration or load are refined to ensure the service life and function of the structure.

关 键 词：隧道工程 超宽 开洞 结构 力学影响分析 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]