大直径盾构隧道新型扩挖结构关键构件力学特征分析  

Force Law Analysis of Key Components in the New Enlarged Excavation Structure for Large Diameter Shield Tunnel

作　　者：李爱民[1,2] 郭旺 LI Aimin;GUO Wang(Tianjin Municipal Engineering Design and Research Institute, 300392, Tianjin, China)

机构地区：[1]天津市市政工程设计研究院,天津300392 [2]同济大学土木工程学院,上海200092

出　　处：《城市轨道交通研究》2019年第7期92-96,共5页Urban Mass Transit

摘　　要：结合北京地铁14号线?10m盾构隧道扩挖车站试验段工程,研究分析采用盾构中洞—边桩法扩挖修建地铁车站施工过程中结构体系的受力转换、受力行为及变化特征。通过地层结构数值模拟方法,动态分析确定盾构管片、边桩导洞、中导洞扣拱初衬及中柱等构件的内力和变形特征。研究结论可为类似工程的设计和施工提供参考。Combining the test section project of10 m diameter shield tunnel expansion on Beijing metro Line14, the stress transformation, stress behavior and variation law in the process of structure formation that adopts the shield middle tunnel-side pile method expansion construction are studied.Through numerical simulation and calculation of the stratum structure, the internal force and deformation law of segment, primary lining structure and middle column are determined by dynamic analysis.The research conclusion provides a reasonable and feasible technical basis for engineering design and construction.

关 键 词：大直径盾构隧道 扩挖结构 盾构中洞-边桩法 数值模拟 

分 类 号：U455[建筑科学—桥梁与隧道工程] U231[交通运输工程—道路与铁道工程]