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[1]吴永哲,朱泽萱,杨 平,等.60 m级超长联络通道冻结法施工与实测分析[J].建筑科学与工程学报,2023,40(06):148-156.[doi:10.19815/j.jace.2021.11039]
　WU Yongzhe,ZHU Zexuan,YANG Ping,et al.Construction and measurement analysis of freezing method for 60 m level super long connecting passage[J].Journal of Architecture and Civil Engineering,2023,40(06):148-156.[doi:10.19815/j.jace.2021.11039]
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60 m级超长联络通道冻结法施工与实测分析(PDF)
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
40卷
期数:
2023年06期
页码:
148-156
栏目:
桥梁工程
出版日期:
2023-11-30

文章信息/Info

Title:
Construction and measurement analysis of freezing method for 60 m level super long connecting passage
文章编号:
1673-2049(2023)06-0148-09
作者:
吴永哲1,朱泽萱2,杨 平2,刘红伟1,吴文亮1
(1. 中交隧道工程局有限公司,江苏 南京 210007; 2. 南京林业大学 土木工程学院,江苏 南京 210037)
Author(s):
WU Yongzhe1, ZHU Zexuan2, YANG Ping2, LIU Hongwei1, WU Wenliang1
(1. CCCC Tunnel Engineering Company Limited, Nanjing 210007, Jiangsu, China; 2. College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, Jiangsu, China)
关键词:
超长联络通道;  冻结法;  温度场;  冻胀;  融沉;  实测分析
Keywords:
super long connecting passage;  freezing method;  temperature field;  frost heave;  thaw settlement;  measurement analysis
分类号:
TU445
DOI:
10.19815/j.jace.2021.11039
文献标志码:
A
摘要:
为全面掌握60 m级超长联络通道冻结温度场、冻胀融沉变形规律,为今后类似工程积累经验,对福州地铁2号线紫阳站—五里亭站区间66 m超长联络通道冻结法施工过程进行温度和变形实测,分析了该超长联络通道施工工艺、冻结温度和地层变形规律,总结了其有别于常规联络通道的特点。结果表明:与常规联络通道相比,超长联络通道在结构设计、冻结方案、施工工艺等方面需进行一系列优化与改进,保证冻结施工顺利完成的同时也兼顾经济性; 冻结降温过程中,冻结向内侧发展速率是向外发展的1.75倍; 淤泥夹砂地层在斜交冻结管处测点与常规联络通道测点规律有所区别; 冻结管搭接区域测点温度低于非搭接区域; 由于冻土体量更大,地表隆起与沉降量比常规联络通道更大,影响范围更广,同一断面测点距离隧道中线距离越小,位移越大; 当测点超过隧道中线20 m后,冻胀融沉量较小; 中线处D5-4测点冻胀量和融沉量分别是距中线20 m处D5-1测点的2.8倍和2.3倍; 各断面最大冻胀融沉量出现在隧道中线处,并沿联络通道中线分布; 由于联络通道端头断面冻土体量大,其冻胀量和融沉量分别是中线处的1.6倍和1.7倍,有别于常规联络通道。
Abstract:
In order to comprehensively grasp the freezing temperature field, frost heave and thaw settlement deformation laws of the 60 m level super long connecting passage, and accumulate experience for similar projects in the future, the temperature and deformation measurement research was conducted on the freezing method construction process of the 66 m super long connecting passage between Ziyang station and Wuliting station on Fuzhou metro line 2. The construction process, freezing temperature, and formation deformation law of the super long connecting passage were analyzed through actual measurement, and the characteristics that were different from conventional connecting passages were summarized. The results show that compared with conventional connecting passages, super long connecting passages require a series of optimizations and improvements in terms of structural design, freezing scheme, construction technology, and other aspects to ensure the smooth completion of freezing construction while also considering economic efficiency. During the freezing and cooling process, the development rate of freezing inward is 1.75 times that of outward development. There is a difference in the law between the measurement points at the oblique freezing pipe and the conventional connecting passage in the silt and sand layer. The temperature of the measuring point in the overlapping area of the frozen tube is lower than that in the non overlapping area. Due to the larger volume of frozen soil, the surface uplift and settlement are larger compared to conventional connecting passage, and the impact range is wider. The smaller the distance between the measuring points on the same section and the centerline of the tunnel, the greater the displacement. When the measuring point exceeds the centerline of the tunnel by 20 m, the amount of frost heave and thaw settlement is relatively small. The frost heave and thawing settlement of point D5-4 at the centerline are 2.8 times and 2.3 times that of point D5-1 at a distance of 20 m from the centerline. The maximum frost heave and thaw settlement of each section occurs at the centerline of the tunnel and is distributed along the centerline of the connecting passage. Due to the large volume of frozen soil at the end section of the connecting channel, its frost heave and thawing settlement are 1.6 times and 1.7 times that of the centerline, which is different with conventional connecting passage.

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备注/Memo

备注/Memo:
收稿日期:2022-11-09
基金项目:国家自然科学基金项目(52178337); 中交隧道局集团有限公司科研项目(KY-2021-03)
作者简介:吴永哲(1978-),男,高级工程师,E-mail:1627255299@qq.com。
通信作者:杨 平(1964-),男,教授,博士生导师,E-mail:yangping@njfu.edu.cn。
更新日期/Last Update: 2023-12-01