基于管节变形控制的深中通道钢壳混凝土沉管无支撑仓格式浇筑顺序研究

孙文火; 刘梅梅; 嵇廷

doi:10.3973/j.issn.2096-4498.2021.12.011

隧道建设 >

2021 , Vol. 41 >Issue 12: 2106 - 2112

DOI: https://doi.org/10.3973/j.issn.2096-4498.2021.12.011

研究与探索

基于管节变形控制的深中通道钢壳混凝土沉管无支撑仓格式浇筑顺序研究

孙文火 ,
刘梅梅 ,
嵇廷

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(1. 中交四航工程研究院有限公司，广东广州 510230； 2. 水工构造物耐久性技术交通运输行业重点实验室，广东广州 510230； 3. 南方海洋科学与工程广东省实验室（珠海），广东珠海 519082； 4. 中交四航局第二工程有限公司，广东广州 510230）

孙文火（1988—），男，安徽安庆人，2018年毕业于华南理工大学，桥梁与隧道工程专业，博士，高级工程师，现从事桥梁与隧道施工技术研究工作。E-mail： swenhuo@cccc4.com。

网络出版日期: 2022-01-05

基金资助

南方海洋科学与工程广东省实验室（珠海）河口海岸与岛礁工程创新团队建设项目（311020009）

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Concreting Sequence without Support for Steel-Shell-Concrete Immersed Tube of Shenzhen-Zhongshan Link Based on Segmental Deformation Control

SUN Wenhuo ,
LIU Meimei ,
JI Ting

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(1. CCCC Fourth Harbor Engineering Institute Co., Ltd., Guangzhou 510230, Guangdong, China; 2. Key Laboratory of Hydraulic Structure Durability Technology for Transportation Industry, Guangzhou 510230, Guangdong, China; 3. Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, Guangdong, China; 4. The Second Engineering Company of CCCC Fourth Harbor Engineering Co., Ltd., Guangzhou 510230, Guangdong, China)

Online published: 2022-01-05

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摘要

为实现深圳至中山跨江通道（简称深中通道）钢壳混凝土沉管高精度高效率预制，开展钢壳混凝土沉管无支撑仓格式浇筑顺序研究。首先，研究考虑混凝土强度时变性、收缩徐变、水化热及自重共同作用的钢壳混凝土沉管施工变形仿真计算方法；然后，分析混凝土水化热温度场对管节变形的影响规律；最后，分析管节仓格浇筑顺序及有无设立支撑系统对沉管变形的影响，基于沉管变形控制要求，实现对钢壳混凝土沉管仓格合理浇筑顺序的优选。研究结果表明： 1)混凝土水化热对管节最终变形影响较小； 2)考虑智能台车浇筑效率及管节变形控制，棋盘式跳仓浇筑工艺最优； 3)顶板浇筑时设立支撑系统对顶板变形影响较小，可取消。

关键词： 钢壳混凝土沉管; 管节变形控制; 支撑系统; 水化热; 仓格式浇筑

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孙文火 , 刘梅梅 , 嵇廷 .

基于管节变形控制的深中通道钢壳混凝土沉管无支撑仓格式浇筑顺序研究

[J]. 隧道建设, 2021 , 41(12) : 2106 -2112 . DOI: 10.3973/j.issn.2096-4498.2021.12.011

Abstract

To realize high-precision and high-efficiency prefabrication of steel-shell-concrete immersed tubes for the Shenzhen-Zhongshan link (hereinafter the Shenzhong link), the cell-type concreting sequence without support is studied. First, the simulation calculation methods for steel-shell-concrete immersed tubes under the combined action of time-varying strength, shrinkage, creep, hydration heat, and deadweight of concrete are investigated. Second, the influence of the temperature field of concrete hydration heat on tube deformation is analyzed. Finally, the influence of cell-type concreting sequence with and without a support system on the deformation of immersed tubes is analyzed and the optimum concreting sequence is chosen. The results show the following: (1) the hydration heat of concrete has a limited influence on the final deformation of tubes; (2) the ceu-type and hopping concreting technology is the optimum considering the pouring efficiency of the intelligent trolley and deformation control; and (3) the support system can be canceled as it has a negligible influence on the deformation of the top plate.

Key words： steel-shell-concrete immersed tube; segmental deformation control; support system; hydration heat; cell-type concreting

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