盖挖逆作大跨度、大截面型钢混凝土组合结构施工技术

资料大小：1M
资料类型：.PDF
资料等级：
发布时间：2022-07-07

资料介绍

摘要：型钢-混凝土（SRC）结构具有承载力高、刚度大、扰震性能好、施工快速方使等显著优点,合理、有效地控制
结构施工过程中的核心工序是保障SRC结构工程质量的关键所在。以广深港客运专线福田丰站盖挖送作主体结
构大琦度、大截面Ⅱ型钢流凝土组合结构为青景,结合实践经验,重点总结、论述大截面型钢梁制作、安装及焊接变
形控制,重荷裁支架设计、计算、预压，大体积泥凝土施工温控等检心工序的安全质量控制方法。
关键词:型钢混凝土；组合结构；施工
中图分类号：TU398
文献标识码：A文章编号：1004-2954（2012）06 - 0121 - 06
ConstructionTechnology of Covered Top-Down Excavation Method in
Composite Structure of Steel-Reinforced Concrete with Long
Span and Large Cross-Section
TANG Wei-ping
( Hubei Engineering Supervision and Comsulting Co., Ltd., China Railway Siyuan Survey and
Design Croup, Wuhan 430063, China)
Abstract: SRC (steel-reinforced concrete ) structure has significant advantages such as high bearing
capacity, strong rigidity, better seismic performance, convenient to construetion etc , and how to
reasonably and effectively control the core processes during construction is the key issue on project
quality. In this paper, the composite structure of H-shaped steel-reinforced concrete by covered top-down
excavation method at Futian Station of Guangzhou-Shenzhen-Hong Kong Passenger-dedicated Line was
cited as an example, In combination with practical experiences, several safety and quality control
methods were emphatically summarized and digcussed so as to provide references for similar projects，
such as：the fabrication, installation and welding deformation control of the shaped-steel beam with large
cross-scction；the design, calculation and the preloading of the support under heavy load；temperature
control during construction of mass concrete structure.
Key words：sleel-reinforced concrete；composite structure；construction
楼林立,为保证基坑及周边建筑安全,A区的A3和C、
1 概况
D区为盖挖逆作,A1.A2、B和E区为明挖顺作。
1.1 工程概况
盖挖逆作段采用3 层 5 跨 H 型钢混凝土现浇框
广深港客运专线福田车站为地下3层铁路客运车
架结构,跨度大,最大跨度 21.46 m；截面大,顶板厚
站,站场规模4台8线,位于深圳市福田区市民中心广
1200mm，顶横梁1400mmx2500mm，顶纵梁
场西侧,车站沿益田路方向南北布置,北起福中路,南
1400mmx2200mm,主体结构梁板断面见图Ⅰ;混凝
到福华路,车站为地下 3 3 层，总长1024 m，标准段宽
土一次浇筑呈大,节段划分最长34m,一次浇筑混凝
78.86m,底板理深约32.5m。车站分为A、B、C、D、E
土3 700 余 m’,均采用 C40微膨胀纤维素混凝土。该
5个施工段,由于车站所处为深圳市中心地带，周边高
结构型钢梁采取工厂制作,现场拼装,采用支架立模一
次浇筑成型。
收稿日期：2011-12-20
作者商介:唐卫平（1972一）,男,高级工程师,1995 年毕业于长沙快递
1.2 型钢-混凝土组合结构
学院土木工程系铁道工程专业,工学学士,E-mail:tayjlgst*p@ 126.com。
型钢一混凝土组合结构（ steel reinforced comcrete