钱塘江底地铁联络通道双侧发散布孔的冻结温度场实测

doi:10.3973/j.issn.2096-4498.2024.06.008

隧道建设（中英文） ›› 2024, Vol. 44 ›› Issue (6): 1214-1222.DOI: 10.3973/j.issn.2096-4498.2024.06.008

钱塘江底地铁联络通道双侧发散布孔的冻结温度场实测

孙枫

（杭州市地铁集团有限责任公司，浙江杭州 310019）

出版日期:2024-06-20 发布日期:2024-07-12
作者简介:孙枫（1978—），男，浙江杭州人，2001年毕业于南京工业大学，岩土工程专业，本科，高级工程师，主要从事城市轨道交通的勘测管理工作。Email： sunfeng_19782023@163.com。

In-situ Freezing-Temperature Field Monitoring of a Metro Connecting Gallery With a Double-Sided Hole Arrangement in Qiantang River

SUN Feng

(Hangzhou Metro Group Co., Ltd., Hangzhou 310019, Zhejiang, China)

Online:2024-06-20 Published:2024-07-12

摘要/Abstract

摘要： 钱塘江底地层富含气及动水，会明显影响江底联络通道冻结施工的温度场演变过程和分布特征。为解决该问题，通过对位于钱塘江底的杭州地铁6号线某联络通道冻结工程进行现场监测，研究冻结施工中不同位置地层温度的演变过程，分析停冻后冻结管内的温度变化特征，获得地层中含气及地下水流动对联络通道冻结温度场的影响规律。1）双侧发散布孔时，冻土向内平均发展速度是向外的1.47倍，而停冻6 h后外排和内排冻结管内的温度分别回升5 ℃和10 ℃； 2）地层中囊状气泡削弱了冻结管向周围土体的冷量传递过程，从而明显影响冻结效果，冻结过程中气泡位置的温度比冻结管终端位置偏高8~18.4 ℃； 3）地下水流动也会影响地层中的冷量分布，冻结57 d时冻结壁上、下游对应位置冻结管内温度相差8 ℃，而停冻6 h后相应位置的冻结管内温度分别回升了5 ℃和2 ℃。研究结果表明：双侧隧道内发散布孔方式可以有效解决含气及动水地层中影响联络通道冻结施工的问题，而地层中囊状气泡和地下水流动都会明显影响冻结温度场的分布特征。

关键词: 人工冻结法, 含气与动水地层, 地铁联络通道, 双侧发散布孔, 冻结温度场, 现场实测

Abstract: The complex geological conditions of rich gas and dynamic water in the Qiantang river considerably affect the evolution and distribution characteristics of the temperature field during the freezing process of the connecting gallery. A case study is conducted on the in-situ monitoring of a freezing project at the connecting gallery of the Hangzhou metro line 6 in the Qiantang river. The process of formation temperature variation at different positions during the freezing process is investigated, and the temperature variation characteristics of the freezing pipe after freezing are analyzed to determine the influence of gas and groundwater flow on the freezing-temperature field of the connecting gallery. The main results are summarized as follows. (1) Under bilateral hole distribution, the average speed of frozen soil inward development is 1.47 times that of outward development. When the freezing is stopped for 6 h, the temperature in the outer and inner tubes increase by 5 ℃ and 10 ℃, respectively. (2) The presence of bubbles hinders the cold transfer process of the freezing tube to the surrounding soil, thereby significantly affecting the freezing effect. The formation temperature at which bubbles exist during the freezing process is 8–18.4 ℃ higher than that at end position of freezing tube. (3) Groundwater flow also affects the distribution of cooling capacity in the formation. After a frozen period of 57 d, the temperature difference between the upper and downstream positions in the freezing tube reaches 8 ℃. When the freezing is stopped for 6 h, the temperature in the freezing tube at the corresponding position increased by 5 ℃ and 2 ℃, respectively. The results show that the bilateral divergently-arranged freezing tubes in tunnel can effectively mitigate the influence of gas and dynamic water on the formation of the freezing of the connecting gallery. Additionally, the bubbles in the formation and the flow of groundwater affect the distribution characteristics of the freezing-temperature field.

Key words: artificial freezing method, gas- , and water-bearing strata, metro connecting gallery, double-side divergently-arranged freezing pipes, freezing-temperature field, field test

孙枫. 钱塘江底地铁联络通道双侧发散布孔的冻结温度场实测[J]. 隧道建设, 2024, 44(6): 1214-1222.

SUN Feng. In-situ Freezing-Temperature Field Monitoring of a Metro Connecting Gallery With a Double-Sided Hole Arrangement in Qiantang River[J]. Tunnel Construction, 2024, 44(6): 1214-1222.

[1]	刘夏冰, 贺少辉, 麻建飞, 于娅娜, 郭佳城, 张军. 浅埋超大跨隧道出口偏压段双层初期支护承载特征研究[J]. 隧道建设, 2024, 44(3): 515-525.
[2]	王长虹, 张海东, 董济涵, 李飞, 何红员. 南通饱和粉砂地层地铁联络通道冻结法的水-热-力耦合研究[J]. 隧道建设, 2023, 43(6): 948-958.
[3]	彭智勇, 杨秀仁, 黄美群, 林放, 杨明. 预制装配式地下车站结构施工阶段力学行为分析[J]. 隧道建设, 2022, 42(3): 398-405.
[4]	黄威, 任梦, 陈培帅, 罗会武. 盾构水平姿态的理论分析模型[J]. 隧道建设, 2022, 42(1): 83-89.
[5]	姜鑫, 周晓敏, 马文著, 位贵江. 相变潜热的冻胀过程离散元数值模拟及其工程应用——以郑州二七广场地铁隧道始发端加固人工冻结工程为例 [J]. 隧道建设, 2021, 41(S2): 353-359.
[6]	向亮, 叶飞, 梁兴, 欧阳奥辉, 赵汝亮. 考虑冻结管影响范围的多管冻结温度场研究[J]. 隧道建设, 2021, 41(1): 52-59.
[7]	卫佳莺, 马永政, 莫振泽, 郦亮, 靳永福, 丁謇. 机械法联络通道T接施工地层隆沉变化特征研究——以无锡地铁3号线顶管法联络通道T接施工示范工程为例 [J]. 隧道建设, 2020, 40(S2): 136-143.
[8]	王磊, 李方政, 方亮文, 丁航, 付财. -18 ℃盐水冻结隧道近接下穿上覆结构冻胀规律试验研究[J]. 隧道建设, 2020, 40(9): 1307-1313.
[9]	隋洪瑞，周金忠，贺维国. 天津海河隧道泡沫-水喷雾系统保温措施升级及改造[J]. 隧道建设, 2020, 40(2): 283-291.
[10]	刘颖彬, 廖少明, 陈立生, 柳毅强, 顾颖成. 软土盾构近距离下穿地铁双圆隧道变形实测分析[J]. 隧道建设, 2020, 40(10): 1462-1470.
[11]	赵汝亮，姚红志，何彪，郭华伟，叶飞. 砂卵石地层台阶法施工隧道围岩-支护结构应力应变特性三维离散元分析[J]. 隧道建设, 2019, 39(S1): 235-244.
[12]	梁晓亮，石庆能，邓琳，唐勇，刘守花，阳军生. 既有运营地铁车站结构下换乘节点施工方案比选研究[J]. 隧道建设, 2019, 39(S1): 369-376.
[13]	马　俊，胡导云, 杨　平 . 平面斜交联络通道水平冻结及实测分析[J]. 隧道建设, 2019, 39(12): 1965-.
[14]	仇文革，李冰天，田明杰，李思，黄海昀. 基于现场实测的隧道初期支护受力模式分析[J]. 隧道建设, 2017, 37(12): 1508-1517.
[15]	田明昱，王艳磊，腾俊洋，舒国钧. 地质因素对隧道围岩松动圈的影响分析——以重庆某隧道为例[J]. 隧道建设, 2016, 36(4): 390-397.

钱塘江底地铁联络通道双侧发散布孔的冻结温度场实测

In-situ Freezing-Temperature Field Monitoring of a Metro Connecting Gallery With a Double-Sided Hole Arrangement in Qiantang River

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

本文评价