Analysis of influencing parameters of temperature field in a new pipe-roofing freezing method

Authors

WU Yuwei, College of Civil Engineering and Architecture, Hainan University, Haikou 570228, China
LI Chunfang, College of Civil Engineering and Architecture, Hainan University, Haikou 570228, China
HU Jun, College of Civil Engineering and Architecture, Hainan University, Haikou 570228, China Hainan; Investigation Institute of Hydrogeology and Engineering Geology, Haikou 570206, ChinaFollow
WANG Zhixin, Hainan Investigation Institute of Hydrogeology and Engineering Geology, Haikou 570206, China
WANG Shucheng, Hainan Investigation Institute of Hydrogeology and Engineering Geology, Haikou 570206, China

Abstract

The development status of the temperature field around the freezing pipe in the method of pipe roofing freezing is the technical focus of this construction method. In order to study the development of the temperature field in this method, two paths are selected in the model, and analysis points are placed on the path. By analyzing the effects of soil thermal conductivity, volumetric heat capacity, latent heat of phase change, and original ground temperature on the development law of the temperature field, the following conclusion was drawn:Compared with the method of freezing the pipe curtain of the Gongbei tunnel in Hong Kong-Zhuhai-Macau, the new method of pipe freezing was adopted. Supporting forms are more flexible and diverse, and are less constrained by the terrain; soil thermal conductivity has a significant effect on the temperature field, the greater the thermal conductivity, the faster the temperature drop, and the greater the magnitude; the volumetric heat capacity has a greater effect on the temperature field, the smaller the volumetric heat capacity, the faster the temperature drop, and the greater the magnitude; the latent heat of soil phase change has almost no effect on the change of temperature field; the lower the original ground temperature, the shorter the freeze time required to reach the same temperature. The results obtained can be used as reference for similar projects in the future.

Keywords

new pipe roofing freezing method, temperature field, influence parameters, numerical analysis

DOI

10.3969/j.issn.1001-1986.2019.01.024

Recommended Citation

WU Yuwei, LI Chunfang, HU Jun, et al. (2019) "Analysis of influencing parameters of temperature field in a new pipe-roofing freezing method," Coal Geology & Exploration: Vol. 47: Iss. 1, Article 25.
DOI: 10.3969/j.issn.1001-1986.2019.01.024
Available at: https://cge.researchcommons.org/journal/vol47/iss1/25

Reference

[1] HU Jun,LIU Yong,WEI Hong,et al. Finite-element analysis of the heat transfer of the horizontal ground freezing method in shield-driven tunneling[J]. International Journal of Geomechanics,American Society of Civil Engineers,2017,17(10):04017080.

[2] HU Jun,LIU Yong,LI Yuping,et al. Artificial ground freezing in tunnelling through aquifer soil layers:A case study in Nanjing Metro Line 2[J]. Ksce Journal of Civil Engineering,2018, 22(10):1-7.

[3] LIU Yong,HU Jun,XIAO Huawen,et al. Effects of material and drilling uncertainties on artificial ground freezing of cement-admixed soils[J]. Canadian Geotechnical Journal,2017, 54(5):1659-1671.

[4] 胡俊,杨平. 大直径杯型冻土壁温度场数值分析[J]. 岩土力学,2015,36(2):523-531. HU Jun,YANG Ping,Numerical analysis of temperature field of large diameter cup type frozen soil wall[J]. Rock and Soil Mechanics,2015,36(2):523-531.

[5] 胡俊,卫宏,刘勇. 冻土帷幕设置加热限位管时温度场数值分析[J]. 隧道建设,2016,36(6):688-694. HU Jun,WEI Hong,LIU Yong. Numerical analysis of temperature field during the installation of heating limiting tube on frozen soil curtain[J]. Tunnel Construction,2016,36(6):688-694.

[6] GOTO Y,YAMASHITA A,TAKASE Y. Field observation of load distribution by joint in pipe beam roof[C]//Doboku Gakkai Ronbunshu,1984,(344/I-1):387-390.

[7] TAN W L,PATHEGAMA R G. Numerical analysis of pipe roof reinforcement in soft ground tunneling[C]//Proceedings of 16th ASCE Engineering Mechanics Conference,2003,American Society of Civil Engineers,USA:1-10.

[8] 姚大钧,吴志宏,张郁慧. 软弱黏土中管幕工法之设计与分析[J]. 岩石力学与工程学报,2004,23(增刊2):4999-5005. YAO Dajun,WU Zhihong,ZHANG Yuhui. Design and analysis of pipe work method in weak clay[J]. Chinese Journal of Rock Mechanics and Engineering,2004,23(S2):4999-5005.

[9] 李向阳,闫治国,朱合华,等. 软土地层管幕法隧道箱涵顶进开挖数值模拟[C]//全国城市地下空间学术交流会论文集, 2004.

[10] 陆明,朱祖熹,陈鸿. 管幕法箱涵顶进施工工艺的防水设计探讨[J]. 中国建筑防水,2006(9):39-42. LU Ming,ZHU Zuxi,CHEN Hong. Discussion on waterproof design of jacket culvert jacket construction technology[J]. China Construction Waterproofing,2006(9):39-42.

[11] 孙钧,虞兴福,孙,等旻. 超大型"管幕-箱涵"顶进施工土体变形的分析与预测[J]. 岩土力学, 2006, 27(7):1021-1027. SUN Jun,YU Xingfu,SUN Min,et al. Analysis and prediction of deformation of super-large "tube curtain-culvert" jacking construction soil[J]. Rock and Soil Mechanics,2006,27(7):1021-1027.

[12] 阎石,金春福,钮鹏. 新管幕工法大直径钢顶管施工力学特性数值模拟分析[J]. 施工技术,2009,38(增刊2):376-380. YAN Shi,JIN Chunfu,NIU Peng. Numerical simulation analysis of mechanical properties of large diameter steel jacking pipe in the new pipe construction method[J]. Construction Technology, 2009,38(S2):376-380.

[13] 王健. 新管幕肋梁结构体系静力性能试验研究[D]. 沈阳:沈阳建筑大学,2011.

[14] 张玲玲. 新管幕肋梁结构节点力学性能试验研究[D]. 沈阳:沈阳建筑大学,2011.

[15] 森内浩史,上田保司,生孝博頼. 鋼間凍凍維管止水土の 着持に する研究関[C]//土木学会文集, 論2008.

[16] 胡俊. 水泥改良前后土体冻结温度及力学特性试验研究[J]. 铁道建筑,2013,18(4):156-159. HU Jun. Experimental study on freezing temperature and mechanical properties of soil before and after cement improvement[J]. Railway Construction,2013,18(4):156-159.

[17] 李剑. 管幕冻结施工工法研究与应用[D]. 西安:长安大学, 2015.