地铁盾构下穿公路隧道与建筑物基础的影响研究  

Study on Effects of Metro Shield Tunnel Crossing Under Highway Tunnel and Building Foundation

作　　者：赵强政[1] 

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《交通科技》2013年第3期106-108,共3页Transportation Science & Technology

摘　　要：以某城市地铁盾构隧道为背景,采用三维有限元方法对地铁盾构隧道下穿既有城市公路隧道、近接建筑物箱型基础的情况进行了数值模拟,分析了盾构隧道施工引起地表沉降,及其对隧道路面沉降和应力的影响,探讨了近接建筑物施工引起建筑物箱型基础变形、侧倾和附加应力的变化规律,验证了采用围护桩加固对于减缓和控制盾构施工对公路隧道、建筑物基础沉降、侧倾和附加应力影响的有效性。Based on metro shield tunnel project, three dimensional finite element method is used to study the process of metro shield tunnel crossing under urban highway tunnel and approaching build ing foundation containing box foundation. Then the paper mainly analyzes the ground settlement and the overlying tunnel road surface subsidence as well as its stress changes caused by underlying shield tunnel construction. The variation laws of building foundation deformation, tilt and additional stress caused by approaching construction are also discussed. Through analysis and comparison, the paper proves the effectiveness of fender piles reinforcement on mitigating and controlling of the settlement, tilt and additional stress of the overlying tunnel and the building foundation caused by underlying shield tunnelling.

关 键 词：地铁盾构隧道 下穿隧道 有限元法 相互影响 

分 类 号：U455.1[建筑科学—桥梁与隧道工程]