超深地连墙异形槽段多导管同步浇筑系统设计  

Design of multi-tremie synchronous pouring system for special-shaped chute section of ultra-deep diaphragm wall

作　　者：胡晨 纪晓宇 刘修成 徐杰[1,4] Hu Chen;Ji Xiaoyu;Liu Xiucheng;Xu Jie

机构地区：[1]中交第二航务工程局有限公司,武汉430040 [2]长大桥梁建设施工技术交通行业重点实验室,武汉430040 [3]交通运输行业交通基础设施智能制造技术研发中心,武汉430040 [4]中交公路长大桥建设国家工程研究中心有限公司,北京100032

出　　处：《起重运输机械》2024年第10期76-81,共6页Hoisting and Conveying Machinery

基　　金：国家重点研发计划专项资助项目(2017YFC0805304)。

摘　　要：某长江大桥南航道桥主跨设计长度为2300m,锚碇结构采用支护转结构复合地下连续墙基础,最大成槽深度83 m。一期槽段创新性的采用现浇钢壳混凝土成墙技术,施工时需要配套新工艺、新装备来解决异形多根导管同步性浇筑的难题。为此,文中提出了多导管一体化同步浇筑解决方案。首先,分析该长江大桥南航道桥锚碇基础结构特点,明确十字形槽段浇筑空间和设计参数;其次,详细设计多导管同步浇筑系统,采用自动化流量分料系统搭配一体化多导管浇筑平台来实现异形槽段的同步浇筑;最后,介绍超深锚碇地连墙异形槽段浇筑工序,在槽位处开展多导管同步浇筑系统功能性试验,顺利完成封底混凝土和二次混凝土浇筑,为今后同类型超深地连墙异形槽段的浇筑提供了参考和借鉴。The design length of the main span of the south channel bridge of a bridge on the Yangtze River is 2300 m,and the anchorage structure adopts the composite underground diaphragm wall foundation serving as the supporting and rotating structure,with a maximum chute depth of 83 m.In the first-stage chute section,the cast-in-place steel shelled concrete wallforming technology was innovatively adopted,and new technology and equipment were supplied to solve the problem of special-shaped multi-tremie synchronous pouring.Therefore,in this paper,a multi-tremie integrated synchronous pouring solution is puts forward.Firstly,the structural characteristics of the anchorage foundation of the south channel bridge of a bridge on the Yangtze River were analyzed,and the pouring space and design parameters of the special-shaped chute section were determined.Secondly,a multi-tremie synchronous pouring system was designed in detail,which can realize the synchronous pouring of special-shaped chute section through an automatic flow distribution system and an integrated multi-tremie pouring platform.Finally,the pouring process of the special-shaped chute section of the ultra-deep anchorage diaphragm wall is explained,tests about the performance of the multi-tremie synchronous pouring system were carried out at the chute position,and the concrete sealing and secondary concrete pouring were successfully completed.This paper can serve as a reference for the casting of the same kind special-shaped chute section of ultra-deep diaphragm wall in the future.

关 键 词：超深地连墙 异形槽段 钢壳混凝土 同步浇筑 一体化 

分 类 号：TU69[建筑科学—建筑技术科学] TP24[自动化与计算机技术—检测技术与自动化装置]