60 m级超长联络通道冻结法设计施工技术——以福州地铁2号线紫阳站—五里亭站区间联络通道工程为例

朱泽萱; 刘红伟; 吴永哲; 杨平; 张婷

doi:10.3973/j.issn.2096-4498.2022.06.013

隧道建设 >

2022 , Vol. 42 >Issue 6: 1053 - 1060

DOI: https://doi.org/10.3973/j.issn.2096-4498.2022.06.013

施工技术

60 m级超长联络通道冻结法设计施工技术——以福州地铁2号线紫阳站—五里亭站区间联络通道工程为例

朱泽萱 ,
刘红伟 ,
吴永哲 ,
杨平 ,
张婷

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（1. 南京林业大学土木工程学院，江苏南京 210037； 2. 中交隧道工程局有限公司，江苏南京 210007）

朱泽萱（1997—），男，江苏南京人，南京林业大学土木水利专业在读硕士，研究方向为城市地下工程。Email： zhuzexuan@njfu.edu.cn。 *通信作者：杨平， Email: yangping@njfu.edu.cn。

网络出版日期: 2022-07-05

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Design and Construction Techniques of Freezing Method of Ultra-Long Connecting Gallery between Ziyang Station and Wuliting Station of Fuzhou Metro Line 2

ZHU Zexuan ,
LIU Hongwei ,
WU Yongzhe ,
YANG Ping ,
ZHANG Ting

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(1. School of Civil Engineering, Nanjing Forestry University, Nanjing 210037, Jiangsu, China; 2. CCCC Tunnel Engineering Company Limited, Nanjing 210007, Jiangsu, China)

Online published: 2022-07-05

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摘要

为解决因环境限制而出现的60 m级联络通道冻结设计施工的系列技术难题，以福州地铁2号线紫阳站—五里亭站区间的66 m超长联络通道工程为背景，针对该联络通道关键技术难题，设计采用双集水井结构、减小联络通道尺寸等优化措施。针对60 m级冻结施工重难点，提出以下关键技术： 1）钻孔时采用高精度测斜仪测定钻孔方位角、合理设置钻进参数等纠偏技术； 2）合理设置并优化冻结帷幕尺寸和冻结工期； 3）采用2次支护、分区开挖等开挖构筑措施； 4）合理设置注浆孔，采用初期跳点、自下而上、少量、多点、多次、均匀循序渐进的方法进行精细化跟踪注浆，控制地面沉降。通过冻结测温和地表沉降等实测数据分析可知，该技术保证了冻结质量，控制了冻胀融沉，顺利完成了超长联络通道的建设施工，对周边环境影响小。

关键词：

超长联络通道

; 结构优化; 人工冻结; 钻孔纠偏; 沉降

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朱泽萱 , 刘红伟 , 吴永哲 , 杨平 , 张婷 .

60 m级超长联络通道冻结法设计施工技术——以福州地铁2号线紫阳站—五里亭站区间联络通道工程为例

[J]. 隧道建设, 2022 , 42(6) : 1053 -1060 . DOI: 10.3973/j.issn.2096-4498.2022.06.013

Abstract

A case study on a 66 m long connecting gallery between Ziyang station and Wuliting station of Fuzhou metro line 2 is conducted to summarize the design and construction techniques of the freezing method of the ultra-long connecting gallery (over 60 m) in a complex environment. Optimization measures, such as double collecting well structures and connecting gallery dimension reduction, are implemented during the design phase. The following pivotal techniques are proposed: (1) Drilling azimuth angle is measured by a high-precision inclinometer, and the drilling parameters are appropriately set. (2) Freezing curtain size and freezing period are appropriately set and optimized. (3) Secondary support and zone excavation methods are used. (4) Grouting holes are appropriately set, and the fine tracking grouting is used to control the surface settlement. The analysis of the measured data of freezing measurement and surface settlement show that the techniques used can guarantee the freezing quality, control the frost heaving and thawing settlement, and minimize the influence on the surroundings, resulting in the successful completion of the super-long connecting gallery.

Key words： ultra-long connecting gallery; structural optimization; artificial freezing; drilling and deviation correction; settlement

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