小角度斜跨公路特长连续梁桥施工稳定性分析  

STUDY ON CONSTRUCTION STABILITY OF EXTRA-LONG CONTINUOUS BEAM BRIDGE CROSSING HIGHWAY WITH SMALL ANGLE OF INTERSECTION

作　　者：王娟[1] 

机构地区：[1]中铁十八局集团第六工程有限公司,天津300222

出　　处：《建筑技术开发》2015年第10期41-44,共4页Building Technology Development

基　　金：国家自然科学基金(51078318)

摘　　要：以天津秦皇岛客运专线斜跨公路100 m连续梁施工为例,桥梁中心线与既有铁路夹角仅18.7°,施工难度较大,为全线控制性工程。采用结构力学计算的方法,研究了主跨临时支座反力和连续梁抗不平衡弯矩,主墩0号段支架稳定性,以及防护方案的比选。所采用的结构力学计算方法具有较好的现场实用性,避免了数值计算模型建立和复杂网格划分,易被设计、施工人员掌握。计算结果表明设计符合规范要求,现场施工安全,验证了结构力学计算模式正确。By taking on length of 100m continuous beam bridge construction on Tianjin-Qinhuangdao high-speed passenger railway, the small angle of intersection is 18.7° between bridge and existing highway. The temporal support reactive force is calculated by means of structural mechanics, as well as bending moment of continuous beam bridge, stability of 0 main pier, together with optimization of protection scheme. The adopted calculation method has excellent practical application to be accepted easily by practitioner, avoiding numerical modeling and complicated meshing. The calculating results present design meets equipment of code. Actually, field construction is safe, validating the correctness of calculating method of structural mechanics.

关 键 词：连续梁桥 小角度 结构计算 施工稳定性 挂篮绝缘法 

分 类 号：U448.21[建筑科学—桥梁与隧道工程]