富水砾石地层承台基坑钢筋混凝土围堰防护施工技术  

Production and Construction Technique on the Reinforced Concrete Cofferdam of Water-rich Gravel Stratum Cap Foundation Pit

作　　者：谢阳平[1] 夏龙[1] 

机构地区：[1]中铁一局集团第五工程有限公司,宝鸡721006

出　　处：《北方交通》2013年第6期89-92,共4页Northern Communications

摘　　要：通过拉日铁路年楚河特大桥主承台基坑防护施工的实践,对河漫滩湿地细圆砾土层基坑采用了钢筋混凝土围堰防护技术。此种防护形式结合了地下连续墙的结构特点和沉井下沉工艺,能够充分利用工地既有的常规材料,减少基坑的过度开挖,同时对承台施工影响较小并保证了施工安全。Through construction practice on the main cap foundation pit protection of Lari railway Nianchuhe super- large bridge, reinforced concrete cofferdam protection technique is adopted to the floodplain wetland fine round gravel soil layer foundation pit. This protection method combines the structure features of underground diaphragm wall and the sinking process of open caisson together, so the normal materials on the construction site can be taken full advantage of, over digging of foundation pits can be reduced, the influence on cap construction can be decreased and construction safety can be guaranteed at the same time.

关 键 词：富水砂砾 钢筋混凝土围堰 基坑 承台 

分 类 号：U445.556[建筑科学—桥梁与隧道工程]