深水承台单壁钢吊箱围堰设计.rar

深水承台单壁钢吊箱围堰设计

摘要：介绍杭千高速公路第四合同富春江特大桥主桥深水承台单壁钢吊箱围堰的设计、结构。
关键词：深水承台 单壁钢吊箱 围堰 设计
1概况
杭州至千岛湖高速公路是浙江省公路水路交通建设规划（2003~2020）公路网主骨架“两纵两横十八连三绕三通道”之一连“杭新景高速公路”的组成部分，也是杭州市“交通西进”公路建设规划“一绕、三线、三连、四大接口”公路网主框架的“一线”。富春江特大桥是杭千高速公路杭州至桐庐段第四合同项目中的一座特大桥，位于富阳市东洲街道的张家村以南至灵桥镇北侧，全桥长1679.5m，全宽33.5m，分上下行两幅。其中主桥长367m，为68+2×120+68m预应力混凝土刚构-连续组合梁桥。主桥下部基础为群桩基础，高桩承台。主桥61#、62#、63#墩每个墩单幅桩基为9根Φ2.0m钻孔灌注桩，横桥向3排，每排3根，承台顶面设计标高为+4.00m，底面设计标高为0.00m，承台平面尺寸为14.20×14.20m。主桥墩位于富春江深水区，最深高程在-10.0m至-12.5m之间。经综合比较分析，主桥墩61#、62#、63#承台围堰采用单壁钢吊箱施工。
2 单壁钢吊箱的设计
    围堰是用于水下施工的临时性挡水设施。 钢吊箱围堰的作用是通过吊箱围堰侧板和底板上的封底混凝土围水，为承台施工提供无水的干处施工环境。根据钢吊箱使用功能，将其分为底板、侧板、内支撑、吊挂系统四大部分。其中，侧板、底板是钢吊箱围堰的主要阻水结构并兼作承台模板。钢吊箱围堰是为承台施工而设计的临时阻水结构，其作用是通过吊箱围堰侧板和底板上的封底混凝土围水，为承台施工提供无水的干处施工环境；封底混凝土作为承台施工的底模板，吊箱侧板作为承台施工的侧模板。
2.1 构造形式的选择
国内深水承台施工，多采用沉井、钢围堰或钢吊箱法。由于
Deep water single-wall steel cofferdam design

Abstract: The fourth contract of Hangzhou Fuchun River Highway Bridge in deep water especially single-wall steel cofferdam design, structure.
Key words: deep water single-wall steel cofferdam design
1 Overview
To Thousand Island Lake in Hangzhou in Zhejiang province highway construction planning of highway and waterway transport (2003 ~ 2020) the main road network skeleton "two vertical and two horizontal 18 with three-round three-channel," one of the company, "Hang the new King Highway," the integral part of Hangzhou "Traffic West" highway construction plan, "a round, three-wire, triple, four interface" road network the main frame of the "line." Fuchun River Highway Bridge is of Hangzhou, Hangzhou to the fourth contract Tonglu a bridge project, located in Fuyang City, east street Zhang Jiacun Chau Ling Town north to south, the whole bridge length 1679.5m, the full width of 33.5 m, points up and down two. Which the main bridge length 367m, for the 68 +2 × 120 +68 m Prestressed Concrete Rigid Frame - continuous girder bridge. Lord Bridge of group pile foundation base, high-pile caps. The main bridge 61 #, 62 #, 63 # pier every pier for the nine Φ2.0m Single Pile pile, transverse to the three rows, each row of three, the top cap design elevation of +4.00 m , bottom design elevation for the 0.00m, flat cap size 14.20 × 14.20m. Fuchun River pier in deep water main, the deepest elevation to-12.5m-10.0m in between. Comprehensive comparative analysis, the main pier 61 #, 62 #, 63 # single-wall pile cofferdam of steel box construction.
2 single-wall design of steel box
    Cofferdam is used for underwater construction of temporary retaining facilities. The role of steel cofferdam cofferdam by hanging on the back side and bottom of concrete around water, providing water for the slab construction of trunk construction environment. According to the use of steel box features, will be divided into bottom, side, internal support, hanging system, four major parts. Among them, side, bottom is a steel cofferdam for the main waterproof and doubles as a cap structure of the template. Steel cofferdam construction of platform is designed for temporary waterproof structure, its role is through the cofferdam for side and back on the concrete floor around the water, providing water for the slab construction of the trunk of the construction environment; sealing concrete slab construction as the end of the template, Boxed side panel construction of platform side as a template.
2.1 The choice of structural form
Domestic water pile cap construction, and more use of open caisson, cofferdam or steel steel box method. As