北京地铁14号线穿越东郊灌渠跨河桥控制指标确定  

Control Indicator Determination of Beijing Subway Line 14 Through the Eastern Suburb Irrigation Canals Bridge

作　　者：贾龙飞[1] 王健[1] 李兴[1] 李洋[1] 

机构地区：[1]北京建筑大学土木与交通工程学院,北京100044

出　　处：《北京建筑大学学报》2015年第4期24-27,共4页Journal of Beijing University of Civil Engineering and Architecture

基　　金：建设部研究开发项目(2015-R2-039)

摘　　要：为确定地铁14号线穿越东郊灌渠跨河桥桥梁沉降控制值的问题,运用Midas-GTS软件模拟施工过程,计算、分析得出地铁暗挖隧道施工对既有东郊灌渠跨河桥的附加变形规律和趋势,并结合桥梁自身的结构形式,用Midas-Civil软件模拟计算了在引起桩基沉降的基本施工工况下,东郊灌区跨河桥的几种最不利的变形和沉降状况,结合桥梁的正常使用极限状态、承载能力极限状态及地铁隧道施工对桥梁基础的影响,考虑桥梁的运营荷载,以桥梁的安全性、适用性、耐久性不受影响为目标,依据JTG/T J21—2011《公路桥梁承载能力检测评定规程》配筋混凝土桥梁中承载力的计算,最终确定出东郊灌区跨河桥的控制指标.In order to determine the subsidence control values of subway line 14 through the eastern suburb irrigation canals bridge,using Midas-GTS software to simulate the construction process and calculation,the additional deformation rule and trend of subway underground tunnel construction of the eastern suburb irrigation canals bridge are obtained. Combined with the structure forms of bridge itself,using Midas-Civil software simulation to calculate the most unfavourable deformation and subsidence conditions of the bridge based on the foundation construction of the several basic condition,according to the bridge of the serviceability limit state,bearing capacity limit state and the effects of subway tunnel construction of bridge foundation,considering the load operation of the bridge,taking the bridge safety,applicability and durability not affected as the goal,based on the calculation of reinforced concrete bridge bearing capacity JTG / T J21—2011＂Specification for Inspection and Evaluation of Load-bearing Capacity of Highway Bridges＂,the control index of the eastern suburb irrigation canals bridge is determined.

关 键 词：地铁 桥梁结构 沉降值 控制值 

分 类 号：U441.2[建筑科学—桥梁与隧道工程]