|本期目录/Table of Contents|

[1]范长新,温智,王旭,等.人工冻结法调控多年冻土区桩基础地温场的效果分析*[J].中国安全生产科学技术,2022,18(8):106-113.[doi:10.11731/j.issn.1673-193x.2022.08.016]
　FAN Changxin,WEN Zhi,WANG Xu,et al.Effect analysis of artificial freezing method to regulate ground temperature field of pile foundation in permafrost regions[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2022,18(8):106-113.[doi:10.11731/j.issn.1673-193x.2022.08.016]
点击复制

人工冻结法调控多年冻土区桩基础地温场的效果分析*
分享到：

《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
18
期数:
2022年8期
页码:
106-113
栏目:
职业安全卫生管理与技术
出版日期:
2022-08-31

文章信息/Info

Title:
Effect analysis of artificial freezing method to regulate ground temperature field of pile foundation in permafrost regions
文章编号:
1673-193X(2022)-08-0106-08
作者:
范长新; 温智; 王旭; 施瑞
(1.兰州交通大学 土木工程学院，甘肃 兰州 730070；
2.中国科学院西北生态环境资源研究院 冻土工程国家重点实验室，甘肃 兰州 730000)
Author(s):
FAN Changxin;  WEN Zhi;  WANG Xu;  SHI Rui
(1.School of Civil Engineering,Lanzhou Jiaotong University,Lanzhou Gansu 730070,China;
2.State Key Laboratory of Frozen Soil Engineering,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou Gansu 730000,China)
关键词:
多年冻土区; 桩基础; 人工冻结; 沉降病害; 桩土界面
Keywords:
permafrost region;  pile foundation;  artificial freezing;  settlement disease;  pile-soil interface
分类号:
X947
DOI:
10.11731/j.issn.1673-193x.2022.08.016
文献标志码:
A
摘要:
为了解决青藏铁路运营过程中，由于多年冻土地基的升温退化，部分多年冻土区桥梁桩基础承载性能下降，产生有害沉降变形，进而造成桥梁上部结构移位破坏，甚至部分桥梁桩基础在短时间内产生较大的沉降变形这一严重问题。基于当前多年冻土区桥梁桩基础沉降病害快速抢修技术空缺，提出人工冻结技术处置多年冻土区桥梁桩基础沉降病害的新设想，利用数值软件建立冻结管-桩基础三维模型分析该技术的可行性与调控效果，分析冻结参数、场地冻土条件等对冻结效果的影响。研究结果表明：人工冻结法可以快速降低桩周多年冻土温度；同时，冻结96 h可以对桩基地温场起到较好的冷却效果；冻结管至桩的距离对冻结效果的影响最为显著，冻土的含冰量越大，则降温速率越慢。
Abstract:
In order to solve the problem that in the operation process of the Qinghai-Tibet Railway,due to the heating and degradation of the permafrost foundation,the bearing performance of the bridge pile foundation in some permafrost regions decreased,resulting in harmful settlement deformation,which in turn caused the displacement damage of the bridge superstructure,and even the large settlement deformation of some bridge pile foundation in a short period of time,based on the current vacancy of rapid repair technology for the settlement diseases of bridge pile foundation in permafrost areas,a new idea of using the artificial freezing technology to deal with the settlement diseases of bridge pile foundation in permafrost regions was proposed.The three-dimensional model of frozen pipe-pile foundation was established by numerical software to analyze the feasibility and regulation effect of this technology,and the influence of freezing parameters and site frozen soil conditions on the freezing effect was analyzed.The results showed that the artificial freezing method could quickly reduce the temperature of permafrost around pile.At the same time,freezing 96 h could play better cooling effect on the ground temperature field of the pile foundation.The distance from the frozen pipe to the pile had the most significant effect on the freezing effect,and the greater the ice content of frozen soil,the slower the cooling rate.

参考文献/References:

［1］侯鑫,杨斌,陈继,等.多年冻土区钻孔灌注桩基础早期热稳定性研究现状与展望［J］.冰川冻土,2020,42(4):1202-1212. HOU Xin,YANG Bin,CHEN Ji,et al.The status and review of early thermal stability of cast-in-place pile foundations in permafrost regions［J］.Journal of Glaciology and Geocryology,2020,42(4):1202-1212.
［2］蒋代军.多年冻土地基桩土界面特性及桩基竖向承载性状研究［D］.兰州：兰州交通大学,2019.
［3］LI Y,LIU J X,LI Z,et al.Ground temperature monitoring and the analysis of hot rod cooling for permafrost roadbed［J］.Geotechnical Investigation & Surveying,2020,48(10):11-16.
［4］叶仁政，常娟.中国冻土地下水研究现状与进展综述［J］.冰川冻土,2019,41(1):183-196. YE Renzheng,CHANG Juan.Study of groundwater in permafrost regions of China:status and pr-ocess［J］.Jourmal of Glaciology and Geocryology,2019,41(1):183-196.
［5］YOU Y,WANG J,WU Q,et al.Causes of pile foundation failure in permafrost regions:the case study of a dry bridge of the Qinghai-Tibet Railway［J］.Engineering Geology,2017,230:95-103.
［6］FAN Y,QI J,YAO X,et al.Degradation process of permafrost underneath embankments along Qinghai-Tibet Highway:an engineering view［J］.Cold Regions Science & Technology,2013,85(1):150-156.
［7］史向阳,张泽,李东庆,等.冻融循环作用下锥柱式桩基础水热及变形动态变化规律研究［J］.岩石力学与工程学报,2019,38(S1):3092-3101. SHI Xiangyang,ZHANG Ze,LI Dongqing,et al.Research on dynamic variation of moisture,temperature and deformation of cone-cylindrical pile under freeze-thaw cycles［J］.Chinese Journal of Rock Mechanics and Engineering,2019,38(S1):3092-3101.
［8］SHANG Y H,NIU F J,WU X Y,et al.A novel refrigerant system to reduce refreezing time of cast-in-place pile foundation in permafrost regions［J］.Applied Thermal Engineering,2018,128:1151-1158.
［9］洪荣宝,蔡海兵,鲁婵瑞.地铁隧道冻结法施工地层融沉研究进展及展望［J］.建井技术,2020,41(3):13-20,52. HONG Rongbao,CAI Haibing,LU Chanrui.Research progress and prospect on ground thawing settlement in subway tunnel construction by the artificial ground freezing method ［J］.Mine Construction Technology,2020,41(3):13-20,52.
［10］FU Y,HU J,WU Y.Finite element study on temperature field of subway connection aisle construction via artificial ground freezing method［J］.Cold Regions Science and Technology,2021(2-3):103327.
［11］MARWAN A,ZHOU M M,ABDELREHIM M Z,et al.Optimization of artificial ground freezing in tunneling in the presence of seepage flow［J］.Computers & Geotechnics,2016,75(5):112-125.
［12］袁云辉,杨平.人工冻结技术在矿山法隧道中的应用技术研究［J］.铁道工程学报,2016,33(9):82-86,103. YUAN Yunhui,YANG Ping.Researchon the application of artificial freezing technology inside the tunnel with subsurface excavation ［J］.Journal of Railway Engineering Society,2016,33(9):82-86,103.
［13］SHEN Y J,WANG Y Z,ZHAO X D,et al.The influence of temperature and moisture content on sandstone thermal conductivity from a case using the artificial ground freezing(AGF) method［J］.Cold Regions Science and Technology,2018,155(11):149-160.
［14］张建明.青藏高原冻土路基稳定性研究及公路工程多年冻土分类研究 ［D］.兰州:中国科学院寒区旱区环境与工程研究所,2004.
［15］HE P,MU Y,JOEY Z Y,et al.Freeze-thaw cycling impact on the shear behavior of frozen soil-concrete interface［J］.Cold Regions Science and Technology,2020,173(5):103024.
［16］石泉彬,杨平,张英明.冻土与结构接触面冻结强度研究现状与展望［J］.冰川冻土,2017,39(6):1298-1306. SHI Quanbin,YANG Ping,ZHANG Yingming.Adfreezing strength at the interface between frozen soil and structure:research status and prospect［J］.Journal of Glaciology and Geocryology,2017,39(6):1298-1306.

相似文献/References:

[1]赖金星,刘厚全,汪珂,等.盾构近接立交桥基础安全影响三维数值分析[J].中国安全生产科学技术,2017,13(3):29.[doi:10.11731/j.issn.1673-193x.2017.03.004]
　LAI Jinxing,LIU Houquan,WANG Ke,et al.Three-dimensional numerical analysis on safety influence of shield tunneling construction on the foundation of adjacent overpass[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2017,13(8):29.[doi:10.11731/j.issn.1673-193x.2017.03.004]
[2]成炜康,郑选荣,吕高,等.郑州地区双线盾构隧道开挖对桩基础内力与位移的影响[J].中国安全生产科学技术,2020,16(2):79.[doi:10.11731/j.issn.1673-193x.2020.02.013]
　CHENG Weikang,ZHENG Xuanrong,LYU Gao,et al.Influence of doubleline shield tunnel excavation on internal force and displacement of pile foundation in Zhengzhou[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2020,16(8):79.[doi:10.11731/j.issn.1673-193x.2020.02.013]
[3]李景茂,王旭,王博林,等.盾构切削桩引起的桩基承载特性变化及可行性研究*[J].中国安全生产科学技术,2021,17(5):26.[doi:10.11731/j.issn.1673-193x.2021.05.004]
　LI Jingmao,WANG Xu,WANG Bolin,et al.Research on change of pile foundation bearing characteristics caused by shield cutting piles and its feasibility[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2021,17(8):26.[doi:10.11731/j.issn.1673-193x.2021.05.004]
[4]郑选荣,祁嘉辉,成炜康,等.南通富水砂层盾构隧道开挖对邻近桩基影响分析*[J].中国安全生产科学技术,2022,18(1):146.[doi:10.11731/j.issn.1673-193x.2022.01.023]
　ZHENG Xuanrong,QI Jiahui,CHENG Weikang,et al.Analysis on influence of shield tunnel excavation in Nantong water-rich sand stratum on adjacent pile foundations[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2022,18(8):146.[doi:10.11731/j.issn.1673-193x.2022.01.023]

备注/Memo

备注/Memo:
收稿日期： 2021-11-25
* 基金项目： 国家自然科学基金项目(41771073,41871061);国家自然科学基金国际交流合作项目(42011530084);甘肃省国际科技合作专项项目(20YF8WA007);中国科学院重点部署项目（ZDRW-ZS-2020-1）
作者简介： 范长新，硕士研究生，主要研究方向为桩基础。
通信作者： 温智，博士，研究员，主要研究方向为寒区工程。
更新日期/Last Update: 2022-09-19