土耳其Izmit海湾大桥主塔基础设计与施工构思  

The Conception of Main Tower Foundation Design and Construction for Izmit Bay Bridge in Turkey

作　　者：刘宗华[1] 

机构地区：[1]中铁大桥局集团第一工程有限公司,河南郑州450053

出　　处：《施工技术》2012年第9期11-13,20,共4页Construction Technology

摘　　要：土耳其Izmit海湾大桥投标设计为一座主跨1 550m的双钢塔3跨悬索桥,为双向6车道高速公路桥梁。桥址位于地震活动频繁的深海海湾地带,对桥梁抗震能力提出了更高要求。两主塔墩位于马尔马拉海中,采用钢管桩加固后的地基上铺填碎石垫层的钢筋混凝土沉箱基础方案,有效地解决了地震产生大的水平位移问题。施工方案中,主塔基础采用水下地基加固处理、沉箱岸上组拼整体滑移下水浮运等创新思路。The bidding design scheme of Izmit Bay Bridge in Turkey is three-span suspension bridge with double towers whose main span is 1 550m and it is a two-way six-lane highway bridge.The bridge is located in deep sea gulf region which is featured by frequent seismic activities.This condition demands the bridge to have very high antiseismic capacity.Both main towers are located in Marmara Sea.Reinforced concrete caisson strengthened by concrete filled steel tubular piles and paved with gravel cushions was adopted as the foundation scheme,which effectively solved the problem of big horizontal displacement that earthquakes could cause.Some innovative ideas were used in the construction scheme,including underwater foundation strengthening for main towers foundation and slipping and floating transportation of caisson assembled onshore.

关 键 词：桥梁工程 悬索桥 主塔 基础 沉箱 设计 施工技术 

分 类 号：TU476[建筑科学—结构工程] U448.25[建筑科学—土工工程]