肇庆大桥扩建工程独立钢平台汛期加固设计
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摘要
以肇庆大桥扩建工程为背景,针对深水区大悬臂独立钻孔钢平台防洪问题,提出一种新的防洪思路,即在对临幅桥不产生破坏性影响的前提下,使独立钢平台、钢护筒和临幅桥承台共同抵抗汛期洪水冲击作用。针对本工程设计的防洪加固方案,所有结构满足受力计算要求,且经受住20年一遇洪水冲击的实践考验,证明本加固设计方案安全可行。
Zhaoqing Bridge expansion project is taken as the background. In view of the flood protection problem of large cantilever independent steel platform in deep-water area,a new concept about flood protection method is put forword to make independent steel platform,steel casing,parallel bridge's pile cap jointly resist the flood impact. Aiming at this project,the flood protection reinforcement scheme is designed and all structures meet the requirements of stress,withstood the test of the impact of worst flooding in 20 years moreover. Results show that the flood protection reinforcement scheme is safe and feasible.
Zhaoqing Bridge expansion project is taken as the background. In view of the flood protection problem of large cantilever independent steel platform in deep-water area,a new concept about flood protection method is put forword to make independent steel platform,steel casing,parallel bridge's pile cap jointly resist the flood impact. Aiming at this project,the flood protection reinforcement scheme is designed and all structures meet the requirements of stress,withstood the test of the impact of worst flooding in 20 years moreover. Results show that the flood protection reinforcement scheme is safe and feasible.
引文
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[2]公路桥涵地基与基础设计规范:JTGD63-2007[S].北京:人民交通出版社,2007.
[3]港口工程荷载规范:JTS 144-1-2010[S].北京:人民交通出版社,2010.
[4]苗国良,江五四.嘉绍跨江大桥(南侧)主航道桥桥塔墩钻孔钢平台设计与施工[J].世界桥梁,2010(1):20-23.
[5]董锋,杨富发.江肇高速公路西江特大桥季节性河流桥梁施工临时结构设计[J].公路交通科技(应用技术版),2010(11):284-286.
[6]于志兵.长江防洪敏感区施工栈桥建造及使用安全保障[J].施工技术,2010,39(S1):273-277.
[7]唐栋梁,张中锋,火照才,等.深水大流速条件下的钢栈桥抗倾覆设计[J].公路交通技术,2012(8):64-69.
[8]蒋永祥,王鑫,艾深,等.浅谈太佳黄河大桥安全渡凌、渡汛措施[J].公路,2013(6):126-128.