增补桩基及预应力技术综合处治桥梁基础病害的实例  

An Example about Using Subjoining Pile Foundation and Pre-stress Technology to Deal with the Disease in Bridge Foundation

作　　者：王国亮[1] 魏洪昌[1] 

机构地区：[1]交通部公路科学研究院,北京100088

出　　处：《公路交通科技》2006年第S1期116-119,共4页Journal of Highway and Transportation Research and Development

摘　　要：如何使新增构件与现有结构共同作用是加固处治的关键问题。在此,介绍3种某桥的一个桥墩承台和桩基础病害的处治,由于原结构出现断桩和承台严重开裂,对此进行了特殊考虑。设计中分析了现有结构的承载力,通过张拉托梁预应力钢束,对现有承台进行预加载,使新加桩基起到卸载作用,并与原桩基共同支承承台。同时采用环向预应力,对承台形成套箍作用,提高了承台的承载力,以保证施工安全。How to make new increased structural elements and existing structure work together is the key problem to dealing with the damage and consolidation.The management to pile cap and pile foundation is introduced.Because of the breaking pile and cracking pile cap,special thinking is given to them.In the design bearing capacity of existing structure is analyzed,and pro-loading is given to pile cap by stretching prestressing tendon of trimmer.This makes new increased structural elements effect unloading and suppot...

关 键 词：承台 桩基础 开裂 体外预应力 

分 类 号：U445.71[建筑科学—桥梁与隧道工程]