Development characteristics of freezing temperature field of coastal soft soil strata

Authors

CHEN Junhao, School of Civil Engineering, Fujian University of Technology, Fuzhou 350118, China; Key Laboratory of Underground Engineering, Fujian Province University, Fuzhou 350118, China
ZHUANG Yan, School of Civil Engineering, Fujian University of Technology, Fuzhou 350118, ChinaFollow
CHEN Bijian, School of Civil Engineering, Fujian University of Technology, Fuzhou 350118, China
ZHAO Zhenwei, School of Civil Engineering, Fujian University of Technology, Fuzhou 350118, China;Key Laboratory of Underground Engineering, Fujian Province University, Fuzhou 350118, China
WANG Qiyun, School of Civil Engineering, Fujian University of Technology, Fuzhou 350118, China;Key Laboratory of Underground Engineering, Fujian Province University, Fuzhou 350118, China

Abstract

In order to research the temperature fields and development law of freezing in the construction of connected aisle in coastal soft soil stratum, based on connected aisle between Luoxiu road station and Baise road station of Shanghai subway Line 15, the thickness and average temperature of frozen curtain, and the freezing process were analyzed. The temperature fields and development law of freezing were predicted by the three-dimensional numerical model of the connected aisle and the temperature data which were analyzed. The results show that the inherent pressure in soft soil causes initial pressure in the pressure relief hole. A lot of cement paste was injected during the burial of the freezing tubes, which will inhibit water migration and reduce the effect of frost heaving during the freezing process. The process of freezing can be divided into four stages by temperature:rapid drop of temperature, drop of temperature decreases first and then increases, slow drop of temperature, temperature stability. The rate of development speed of frozen inside and outside curtain is 1.42︰1. The grey silt freezes faster than silty clay with silt. The development freezing speed of silty clay with silt and grey silt are 20.02 mm/d and 29.75 mm/d.

Keywords

freezing method, soft soil, connected aisle, frozen curtain, temperature field, numerical simulation

DOI

10.3969/j.issn.1001-1986.2020.04.024

Recommended Citation

CHEN Junhao, ZHUANG Yan, CHEN Bijian, et al. (2020) "Development characteristics of freezing temperature field of coastal soft soil strata," Coal Geology & Exploration: Vol. 48: Iss. 4, Article 25.
DOI: 10.3969/j.issn.1001-1986.2020.04.024
Available at: https://cge.researchcommons.org/journal/vol48/iss4/25

Reference

[1] 张潮潮. 人工冻土冻胀特性及冻结法施工关键技术研究[D]. 淮南:安徽理工大学,2017. ZHANG Chaochao. The artificial frozen soil frost heave characteristics and the research of key technology in freezing method construction[D]. Huainan:Anhui University of Science & Technology,2017.

[2] 陈军浩,刘桐宇,李栋伟. 人工三圈管冻结模型试验及冻结方案研究[J]. 煤炭科学技术,2017,45(12):94-100. CHEN Junhao,LIU Tongyu,LI Dongwei. Study on artificial three-tube freezing model test and freeze program[J]. Coal Science and Technology,2017,45(12):94-100.

[3] KLINOVA G I,AKSENOV V,DZHAKHANGIROVA N. Thaw-induced deformation properties of frozen soils[J]. Soil Mechanics and Foundation Engineering,2010,47(3):102−107.

[4] 李方政,李栋伟,韩圣铭. 液氮冻结帷幕水热耦合温度场数值分析及应用[J]. 地下空间与工程学报,2013,9(3):590-595. LI Fangzheng,LI Dongwei,HAN Shengming. Numerical analysis on water-thermal coupling temperature field of liquid nitrogen freezing wall and its application[J]. Chinese Journal of Underground Space and Engineering,2013,9(3):590−595.

[5] 王效宾,胡俊,居俊. 水泥改良土杯型冻土壁融化温度场三维数值模拟[J]. 煤田地质与勘探,2017,45(4):102-106. WANG Xiaobin,HU Jun,JU Jun. 3D numerical simulation of melting temperature field of cement-improved soil cup-shaped frozen soil wall[J]. Coal Geology & Exploration,2017,45(4):102-106.

[6] 王晓东,徐拴海,许刚刚,等. 露天煤矿冻结岩土边坡介质特征与稳定性分析[J]. 煤田地质与勘探,2018,46(3):104-112. WANG Xiaodong,XU Shuanhai,XU Ganggang,et al. Medium characteristics and stability of frozen rock(soil) slope in open-pit coal mine[J]. Coal Geology & Exploration,2018,46(3):104-112.

[7] 吴雨薇,李春芳,胡俊,等. 新型管幕冻结法温度场影响参数分析[J]. 煤田地质与勘探,2019,47(1):155-161. WU Yuwei,LI Chunfang,HU Jun,et al. Analysis of influencing parameters of temperature field in a new pipe-roofing freezing method[J]. Coal Geology & Exploration,2019,47(1):155-161.

[8] 孙冠东,焦华喆,陈新明,等. 人工冻结在岩土工程中的应用现状及发展[J]. 煤炭技术,2019,38(6):7-10. SUN Guandong,JIAO Huazhe,CHEN Xinming,et al. Application status and development of artificial freezing in rock and soil engineering[J]. Coal Technology,2019,38(6):7-10.

[9] 王鹏,林斌,侯海杰,等. 冻结管布置形式对冻结壁温度场发展规律影响研究[J]. 煤炭科学技术,2019,47(12):38-44. WANG Peng,LIN Bin,HOU Haijie,et al. Study on influence of freezing tubes layout on development law of temperature field of freezing wall[J]. Coal Science and Technology,2019,47(12):38-44.

[10] 杨太华. 越江隧道工程联络通道冻结法施工风险分析[J]. 地下空间与工程学报,2010,6(6):1201-1206. YANG Taihua. Risk analysis of freezing method applied to adjacent passage construction of cross-river tunnel project[J]. Chinese Journal of Underground Space and Engineering,2010,6(6):1201-1206.

[11] 江洪. 联络通道冻结法施工风险评估与识别[J]. 上海交通大学学报,2011,45(增刊1):38-41. JIANG Hong. Risk assessment &recognition of freezing method for cross-passage construction[J]. Journal of Shanghai Jiao Tong University,2011,45(Sup.1):38-41.

[12] 李庆禹,李慎奎. 影响汉口地区地铁联络通道施工的地质风险探讨[J]. 隧道建设,2013,33(10):841-846. LI Qingyu,LI ShenKui. A discussion on the geological risks influencing the construction of connection galleries of metro works in the Hankou area[J]. Tunnel Construction,2013,33(10):841-846.

[13] 王志良,申林方,李明宇. 冻结法施工的地铁旁通道实测数据分析[J]. 地下空间与工程学报,2010,6(1):138-143. WANG Zhiliang,SHEN Linfang,LI Mingyu. Analysis of measured data of connected aisle in metro tunnels by freezing construction method[J]. Chinese Journal of Underground Space and Engineering,2010,6(1):138-143.

[14] 杨超,岳丰田. 上海长江隧道联络通道冻结优化设计研究[J]. 隧道建设,2012,32(6):843-848. YANG Chao,YUE Fengtian. Study on freezing in construction of connection galleries of Yangtze river-crossing tunnel in Shanghai[J]. Tunnel Construction,2012,32(6):843-848.

[15] 李伟平,胡向东,陈锦,等. 过江隧道圆形联络横通道冻结法布管方案研究[C]//水下隧道建设与管理技术论文集. 2013-11-28,北京:《中国公路》杂志社,2013:42-50. LI Weiping,HU Xiangdong,CHEN Jin,et al. Research on freezing pipe laying scheme of circular cross passage of river crossing tunnel[C]//Technical Paper Collection of Underwater Tunnel Construction and Management. 2013-11-28,Beijing:China Highway Journal,2013:42-50.

[16] 孙立强,任宇晓,闫澍旺,等. 人工冻土冻结过程中热-力耦合的数值模拟方法研究[J]. 岩土工程学报,2015,37(增刊2):137-142. SUN Liqiang,REN Yuxiao,YAN Shuwang,et al. Numerical simulation method for thermal-stress coupling in artificial freezing process[J]. Chinese Journal of Geotechnical Engineering,2015,37(Sup.2):137-142.

[17] 杨平,陈瑾,张尚贵,等. 软弱地层联络通道冻结法施工温度及位移场全程实测研究[J]. 岩土工程学报,2017,39(12):2226-2234. YANG Ping,CHEN Jin,ZHANG Shanggui,et al. Whole range monitoring for temperature and displacement fields of cross passage in soft soils by AGF[J]. Chinese Journal of Geotechnical Engineering,2017,39(12):2226-2234.

[18] 胡小荣,饶志强,汪日堂. 南昌地铁联络通道冻结法模拟[J]. 地下空间与工程学报,2019,15(增刊1):286-292. HU Xiaorong,RAO Zhiqiang,WANG Ritang. Numerical simulations for freezing method in connecting channel excavation of Nanchang subway[J]. Chinese Journal of Underground Space and Engineering,2019,15(Sup.1):286-292.

[19] 陈军浩,刘桐宇,张潮潮,等. 超长联络通道冻结温度场发展特性研究[J]. 铁道科学与工程学报,2019,16(12):3059-3067. CHEN Junhao,LIU Tongyu,ZHANG Chaochao,et al. Analyzing development characteristics of freezing temperature field to ultra-long connected aisle[J]. Journal of Railway Science and Engineering,2019,16(12):3059-3067.

[20] 黄哲峰. 富水砂层中地铁联络通道冻结法施工数值模拟[D]. 南昌:南昌大学,2019. HUANG Zhefeng. Numerical simulation for freezing method in metro connecting channel in water rich sand layer[D]. Nanchang:Nanchang University,2019.