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竖向直排冻结斜井模拟试验及冻土稳定性研究
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摘要
斜井冻结工程多采用竖向直排冻结方式,而针对该方式所形成温度场和冻胀力的研究比较少见。本文进行了竖向直排冻结斜井模型大尺度三维模拟试验,通过试验数据分析,研究了冻结壁的形成过程、温度和水平冻胀力的分布规律。根据土体冻胀和冻结锋面移动规律,进行了符合工程要求的合理简化,推导了竖向直排冻结的温度场分布、冻结壁平均温度预测方程,建立了冻结壁周边任意位置的土体冻胀力的计算模型。针对辽宁双树子煤矿斜井冻结工程进行了理论计算,并利用FLAC3D程序对竖向直排冻结温度场和应力场进行了数值模拟。理论计算和数值模拟的结果与现场实测数据吻合较好,说明了理论公式的科学性和合理性,对研究和防治竖向直排冻结引发土体冻胀问题具有重要的参考价值和实用意义。
Vertical straight multi-row freezing was commonly used in inclined shaft freezing construction. Researches on temperature and forst heaving force in this condition were seldom introduced. In this dissertation, a3-Dimensional large-scale inclined shaft model experiment was conducted, which could simulate process of vertical straight multi-row freezing. The frozen wall's forming process, temperature distribution and frost frontal surface's movement was analyzed by experimental data. According to mechanism of frost heave and freezing front, simplification hypothesis adopted here comply with engineering practice. Further, the temperature distribution, average temperature of frozen wall, and frost heaving force analytical calculation model were introduced, and obtain soil frost heaving force's estimated values in any frozen wall surrounding position were also presented. Engineering parameters of Shuang Shuzi Coalmine inclined shaft freezing project in Liaoning province were studied, Using FLAC, a numerical simulation was conducted to the temperature and forst heave force. The comparison on the field test data and the analytical results shows good agreement. So the feasibility of the theoretical calculations under the simplified assumptions was verified. For studying and preventing of soil frost heaving phenomenon caused by artificial vertical freezing, this dissertation could provide important reference value and practical signifiance.
引文
[1]周国庆.深厚表土特殊凿井与地下工程若干问题研究[M]煤炭工业出版社,2006
    [2]崔云龙.中国煤炭矿井建设发展历程概论[M].中国矿业大学出版社,2003
    [3]虞相,王正廷,苏立凡.我国地层冻结技术的新发展—纪念冻结法凿井40周年[C].中国地层冻结工程40周年论文集.1995
    [4]翁家杰,陈明雄.冻结技术在城市地下工程中的应用[J].煤炭科技技术,1997,25(7):51-53
    [5]陈湘生.地层冻结工法理论研究与实践[M].北京:煤炭工业出版社,2007.3
    [6]童长江.管枫年.土的冻胀与建筑物的冻害防治[M].北京:水利水电出版社,1985.4
    [7]徐学祖.王家澄.张立新.冻土物理学[M].北京:科学出版社.2001
    [8]奥齐西克著.俞昌铭译.热传导[M].北京:高等教育出版社.1983
    [9]崔托维奇著.张长庆,朱元林译.冻土力学[M].北京:科学出版社.1985
    [10]贾力.高等传热学[M].北京:高等教育出版社,2003
    [11]中国矿业学院主编,特殊凿井[M].北京:煤炭工业出版社.1987
    [12]沈季良.崔云龙,王介峰等.建井工程手册(第四卷)[M].北京:煤炭工业出版社,1984
    [13]Carslaw H S, Jaeger J C. The Conduction of Heat in Solids [M]. London:Oxford University Press,1959
    [14]Bonacina C, Fasano A, Comini G. et al. Numerical Solution of Phase-change Problems [J]. International Journal of Heat Mass Transfer,1973,16(6):187-193
    [15]J T Holden. Heat Transfer in Artificial Ground Freezing. Ground Freezing [M]. Balkema,1997
    [16]H.г.Tpyпaк. Geological Properties and Bearing Capacity of Frozen Soils [J]. M. AH CCCP,1954,187c
    [20]Apз Φ З. Definition of Average Temperature of Frozen Wall [J]. Mine Construction,1959.3c:22-33
    [21]高志勤,山本义章.十壤冻结工法(Ⅳ)一次元の解冻[R].地盘冻结工法论文报告集.冷冻.1964.39(439):1-12
    [22]冻土内温度分布计算式とその应用(R).地盘冻结工法论文报告集.冷冻,1979,54(622):3-11
    [23]郭兰坡,庞荣清,史文国.竖井冻结壁温度场的有限元分析[J].中国矿业学院学报,1981(3):37-55
    [24]丁德文,傅连第,庞荣庆.冻结壁变化的数学模型及其计算[J].科学通报,1982,14:875-879
    [25]干松水.张燕.人工冻结壁形成及温度分布有限元分析[J].工程热物理学报,1983,5(2):175-181
    [26]刘中良,潘延龄.一维动边界问题的变时问步长方法[J].华东石油学院学报,1986.10(3):28-39
    [27]刘中良.一种求解动边界问题的有限单元—有限差分法[J].华东石油学院学报,1988.12(2):61-69
    [28]张威廉.竖井冻结过程的模拟方法[J].中国矿业学院学报.1981(3):27-35
    [29]翁家杰.冻结温度场中有限差分方法的应用[J].煤炭学报,1979,2(12):39-47
    [30]商翔宇.周国庆.别小勇.冻结土壤温度场数值模拟的改进[J].中国矿业大学学报,2005.34(2):179-183
    [31]徐士良ANSYS在冻结壁温度场分布分析中的运用[J].安徽建筑工业学院学报,2005.13(2):34-36
    [32]皮爱如.冻结温度场与地下水流场耦合研究[D].淮南:安徽理工大学.2000
    [33]张绪忠地下水渗流作用下饱和砂层冻结壁形成的模型试验研究[D].北京:煤炭科学研究总院,2004
    [34]陈湘生.冻结法加固地层的原理与应用[J].水利水电施工.1997(3):71-73
    [35]陈湘生.濮家骝.土壤冻胀离心模拟试验[J].煤炭学报.1999.24(6):615-619
    [36]陈文豹.汤志斌.潘集矿区冻结壁平均温度及冻结孔布胃圈径的探讨[J].煤炭学报,1982.1(3):46-52
    [37]李功洲.陈文豹.陈四楼上、副井冻结段外层井壁位移实测研究[J].煤炭学报.1995.vol20(4):403-407
    [38]李功洲.陈文豹.深厚冲击层冻结凿技术问题的探讨[C].全国矿山建设学术会议论文选集.1997:284-292
    [39]王文顺.王建平,井绪文等.人工冻结过程中温度场的试验研究[J].中国矿业大学学报,2004.33(4):389-391
    [40]周晓敏.水渗流作用下人工冻结壁形成规律的模型试验及祸合场有限元仿真研究[D].北京.北京交通大学.2004
    [41]江仁和.双排管冻结下冻结壁温度场形成特征的数值分析[J].冰川冻土,2002,2:21-24
    [42]陈钧.水下地层冻结温度场的研究[D].淮南:安徽理工大学.2003
    [43]肖朝昀.人工地层冻结冻土帷幕形成与解冻规律研究[D].上海:同济大学,2007.
    [44]Taber S. The Mechanics of Frost Heaving [J]. Journal of Geology,1930.38:303-317
    [45]Cass L. Miller R D. Research Report 49[R]. U.S Army Cold Regions Research and Engineering Laboratory. Corps of Engineers,1959
    [46]Miller R D. Baker J H, Kolaian J H. Particle Size, Overburden Pressure. Pore Water Pressure and Freezing Temperature of Ice Lenses in Soil[C].7th International Congress of Soil Science. Madison. W.I..1960
    [47]Harlan R L. Analysis of Coupled Heat-fluid Transport in Partially Frozen Soil [J]. Water Resource Research. 1973.9(5):1314-1323
    [48]Takagi S. The adsorption force theory of frost heaving [J]. Cold Regions Science and Technology. 1980.1:57-81
    [49]Outcalt S. A numerical Model of Ice Lensing in Freezing Soils [C].2nd Conference on Soil Water Problems in Cold Regions. Edmonton. Alta,1976
    [50]O'Neill K. Miller R D. Numerical Solutions for a Rigid-ice Model of Secondary Frost Heave[R]. CRREL Rep.82-13, Cold Region Research. And Eng. Lab., N.H.,1982
    [51]Duquennoi C, Fremond M. Levy M. Modeling of Thermal Soil Behavior[C]. Proc. Int. Symp. Frost in Geotechnical Engineering, Finland,1989:895-915
    [52]Fremond M, Mikkola M. Thermo Mechanical Modeling of Freezing Soil[C].6th International Symposium on Ground Freezing, Beijing,1991
    [53]Fremond M. Nicolas P. Macroscopic Thermodynamics of Porous Media [J]. Continuum Mechanics of Thermodynamic,1990,2:119-139
    [54]Gilpin R R. A Model of the "liquid-like" Layer between Ice and a Substrate with Applications to Wire Relegation and Particle Migration[J]. J.Colloid Interface Sci.,1979.68(2):235-251
    [55]Shen Mu. Branko Ladanyi. Modeling of Coupled Heat. Moisture and Stress Field in Freezing Soil [J]. Cold Regions Science and Technology,1987.14:237-246
    [56]Bouyoucous G J. Classification and Measurement of the Different Forms of Water in the Soil by Means of the Dilatometer Method [J]. Mich. Agric. Exp. Stat. Tech. Bull..1917:36-48
    [57]Kolaian J H. Low P F. Calorimetric Determination of Unfrozen Water in Montmorillonite Pastes [J]. Soil Science.1963.95:376-384
    [58]Gilpin R R. A Model for the Prediction of Ice Lensing and Frost Heave in Soils[J]. Water Resources Research,1980,16:918-930
    [59]Black P B. Tice A R. Comparison of Soil Freezing Curve and Soil Water Curve Data for Windsor Sandy Loam [J]. Water Resources Research,1989,25(10):2205-2210
    [60]Chuvilin E M, Yazynin O M. Frozen Soil Macro-and Micro Texture Formation. Proceeding of the 5th International Conference on Permafrost,1988
    [63]E Penner. Frost Heaving Force in Leda Clay[J],Canadian Geotechnical Journal,1970.2:351-363
    [64]梗户源则.土丹の冻结压测定实验[J].土と基础.1977.233
    [65]陈肖柏.基底法向冻胀力的简捷测定计算方法探讨[J].水利水电技术.1980.2:27-31
    [66]B O OpлOB. Cryogeinic Heaving Force [M]. MocκBa.1962.4
    [67]刘鸿绪.建筑基础的冻胀力[C].第五届全国冰川冻土大会论文集(下),兰州:甘肃文化出版社,1996:877-881
    [68]姚直书,程桦.锚碇深基坑排桩冻上墙围护结构的冻胀力研究….岩石力学与上程学报.2004,23(9):1521-1524
    [69]胡向东.卸载状态下冻结壁外载的确定[J].同济大学学报.2002.30(1):6-10
    [70]孙家学,刘斌.冻结壁原始冻胀力的分析与计算方法[J].东北大学学报,1995.16(3):244-247
    [71]安维东,马巍.冻土的温度、水分、应力及其相互作用[M].兰州:兰州大学出版社.1990
    [72]李萍.徐学祖,陈峰峰.冻结缘和冻胀模型的研究现状与进展[J].冰川冻土.,2000.22(1)
    [73]李洪升,张斌,刘增利等.一维冻结土体冻胀量的水热力耦合计算[J].大连理工大学学报,1999.39(5):621-624
    [74]程桦.臧华.人上地层水平冻结冻胀效应准耦合数值分析[J].岩土工程学报,2003.1,vol.25(1):87-90
    [75]宁方波,地下冻结工程中土体冻胀沉对地表变形的分析[D].北京:煤炭科学研究总院.2005
    [76]于基宁,谭峰屹.付伟.饱和正冻土冻结过程的冻胀变形分析[J].岩土力学.2006.10 Supp.Vol27:203-207
    [77]周扬.冻土冻胀理论模型及冻胀控制研究[D].徐州:中国矿业大学.2009
    [78]齐吉琳,马巍.冻土的力学性质及研究现状[J].岩土力学.2010.1.Vol31.No.1:133-143
    [79]朱元林,吴紫旺,何平等.我国冻土力学研究进展及展望[J].冰川冻土.1995.17:6-14
    [80]程国栋.冻土力学与工程的国际研究新进展—2000年国际地层冻结和冻结作用会议综述[J].地球科学进展.2001.Vol6.No3:293-299
    [81]翁家杰.周希圣.陈明雄等.冻结土体的水分迁移和固结作用[J].地下工程与隧道,1999,1:2-8.
    [82]刘波.李东阳.廖建军.土体压力对地铁旁通道解冻后地表沉降的影响[J].煤炭学报.2011.4.vol36(4):551-555
    [83]Gold L H. A possible force mechanism associated with the freezing of liquids in porous materials [J]. Highway Research Board Bulletin,1957,168:65-72
    [84]Anderson D M. Tice A R. The Unfrozen Interfacial Phase in Frozen Soil Water System[J]. Ecol. Stud.. 4:107-125
    [85]Mageau D W. Morgensten N R. Oberservations on Moisture in Frozen Soils [J]. Canadian Geotechnical Journal.1980,17:54-60
    [86]Klein J. Jessberger H L. Creep Stress Analysis of Frozen Soils under Mulliaxial States of Stress[J]. Engineering Geology,1979,13:353-365
    [87]Bragg R A. Andersland O B. Strain rate, Temperature, and Sample Size Effects on Compression and Tensile Properties of Frozen Sand [J]. Engineering Geology,1981,18(1-4):35-46
    [88]Nixon J F. The Role of Convective Heat Transport in the Thawing of Frozen Soils [J]. Canadian Geotechnical Journal,1975,12:425-429
    [89]Nixon J F. Lem G.. Creep and Strength Testing of Frozen Saline Fine-grained Soils [J]. Canadian Geotechnical Journal,1984,21:518-529
    [90]Ground Freezing 2000. Proceedings of the International Symposium on Ground Freezing and Frost Action in Soils [C]. Rotterdam, Netherlands:A. A. Balkema,2000:293-299
    [91]Ono T. Mitachi T. Computer Controlled Tri-axial Freeze Thaw Shear Apparatus [C]. Proceedings of 8th International Symposium of Ground Freezing. Rotterdam, Netherlands:A. A. Balkema,1997:335-339
    [92]Jessberger H L. Opening Address. In [C]. Jones and Holden. eds. Ground Freezing 88. Proceedings of 5th International Symposium Ground Freezing. Rotterdam. Netherlands:A. A. Balkema,1989:407-411
    [93]程言知.浅表隧道上程多冷源冻结温度、应力、水分场耦合研究[D].长沙:中南大学,2003
    [94]周希圣,郑宜枫.高含水粘土层隧道冻结位移场模型试验研究[J].同济大学学报.2000.28(4):472-476
    [95]陈明雄.翁家杰.软土盾构隧道冻结施上试验研究[J].石家庄铁道学院学报,2000.13(增刊):37-39
    [96]吴紫旺.马巍.常小晓等.冻结黄土的应力松弛[J].冰川冻土.1993.15(1):125-128
    [97]吴紫旺.马巍.张长庆等.冻结砂上的强度特性[J].冰川冻土.1994.16(1):15-20
    [98]罗小刚.陈湘生.吴成义.冻融对土工参数影响的试验研究[J].建井技术.2000.21(2):24-26
    [99]张婷.人工冻土冻胀、融沉特性试验研究[D].南京:南京林业大学,2004
    [100]王建平.王文顺.史天生.人工冻结土体冻胀融沉的模型试验[J].中国矿业大学学报.1999.28(4):303-306
    [101]姚直书,程桦.夏红兵.特深基坑排桩冻土墙围护结构的冻胀力模型试验研究[J].岩石力学与工程学报,2007.2.26(2):415-420
    [102]汪仁和.李栋伟.多圈管冻结模型试验及水热耦合数学模型研究[J].合肥工业大学学报.2007.11.30(11):1481-1485
    [103]陶龙光.刘波.国家发明专利《城市地下工程模拟试验系统》[P](2005100779745)
    [104]刘波,陶龙光.国家实用新型专利《工程试验用滑轨装置》[P](ZL 200520110777.X)
    [105]刘波,陶龙光.国家实用新型专利《地下工程三维模型试验系统》[P](ZL 200520110778.4)
    [106]吴云龙.天津地铁某联络通道冻结加固工程模拟试验研究[D].北京:中国矿业大学(北京).201]
    [107]乔京生.陶龙光.地铁隧道水平局部冻结施工应力与位移场数值模拟分析[J].铁道建筑.2004.2:39-41
    [108]杨松山.北京地铁隧道隧道水平冻结施工模型实验研究[D].北京:中国矿业大学(北京).1999.
    1109] Konrad J M. Influence of Cooling Rate on the Temperature of Ice Lens Formation in Clayey Silts[J]. Cold Regions Science and Technology,1989,16:25-36
    [110]Newman G P. Wilson G W. Heat and Mass Transfer in Unsaturated Soils during Freezing[J]. Canadian Geotechnical Journal.1997.34:63-70
    [111]Eigenbrod K D. Effects of Cyclic Freezing and Thawing on Volume Changes and Permeabilities of Soft Fine-grained Soils[J]. Canadian Geotechnical Journal,1996,33(4):529-537
    [112]Sayles F H. State of the Art:Mechanical Properties of Frozen Soil[C]. Proceeding of the 5th International Symposium on Ground Freezing. Rotterdam:A. A. Balkema,1989.1:143-165
    [113]Tao Long-guang. Tao Li-bing. The Simulation Study of Thawing Settlement of Ground Surface in Horizontal Freezing Construction of Metro Tunnel [C]. Proceedings of the Int. Symp. of Civil Engineering in the 21st Century,2000.10, Beijing:Science Press,444-449
    [114]Wang Yan-sen. Yang Zhi-jiang, Yang Wei-hao. Viscoelastic Analysis of Interaction between Freezing Wall and Outer Shaft Wall in Freeze Sinking[C]. The 6th International Conference on Mining Science & Technology. Procedia Earth and Planetary Science 1 2009:612-620
    [115]ISGF. Classification and Laboratory Testing of Artificially Frozen Ground[J]. ASCE J of Cold Regions Engineering,1987,1(1):22-47
    [116]于琳琳.徐学燕.人工侧向冻结条件下土的冻结试验[J].岩土力学,2009,30(1):231-235
    [117]陈祥恩,杜长龙.马泰壕煤矿斜井冻结施工技术[J]煤矿科学技术.2009,37(11):21-23
    [118]何清江,金海城.涂忠惠等.特殊地层的斜井施工[J].煤矿支护.2006(3):40-43
    [119]伍期建.王正延.周晓敏等.深表土斜井冻结设计和施上[C].地层冻结技术和应用——中国地层冻结工程40年论文集.1995
    [120]雷风,巴肇伦.斜井沉井法过垂厚9-14米流砂层的施工总结[J].西部探矿工程,1999,11(3):73-75
    [121]周幼吾,郭东信.邱国庆等.中国冻土[M].北京:科学出版社.2000
    [122]木下诚一著.王异.张志权译.冻土物理学[M].长春:吉林科学出版社,1985
    [123]马巍.吴紫旺.围压对冻上强度特性的影响[J].岩土工程学报,1995,17(5):7-11
    [124]吴国候.土的冻胀理论及其应用[J].勘察科学技术.1997,13(1):44-48
    [125]徐学祖.张立新,王家澄.上体冻胀发育的几种类型[J].冰川冻土.1994,4:301-307
    [126]刘波,韩彦辉.FLAC原理、实例与应用指南[M].北京:人民交通出版社,2005
    [127]1TASCA. FLAC manual:Theoretical Background [M]. Minneapolis. MN:Itasca Consulting Group,1999
    [128]候公羽.刘波.岩土加固理论数值实现及地下上程应用[M].北京:煤炭工业出版社,2006
    [129]翁家杰.井巷特殊施工[M].煤炭工业出版社,1991
    [130]崔广心.相似理论与模型试验[M].徐州:中国矿工业大学出版社.1990
    [131]方开泰,马长兴,正交与均匀试验设计[M].北京:科学出版社.2001
    [132]徐湘田,赖远明,刘峰等.冻土中几类力学试验方法的探讨[J].冰川冻土,2011,33(5):1132-1138
    [133]吴家龙.弹性力学[M].北京:高等教育出版社,2001
    [134]杨维好.黄家会.冻结管受力分析与试验研究[J].冰川冻土,1999.3,21(1):33-38
    []35]中华人民共和国国家安全生产监督管理总局.中华人民共和国煤炭行业标准MT/T 593.8—2011人工冻土物理力学性能试验[S].2011.4
    [136]中华人民共和国国家质量技术监°局.GB/T50123-1999土工实验方法标准[S].北京:中国计划出版社.1999.9
    [137]章根德.土的本构模型及其上程应用[M],北京:科学出版社.1995
    [138]周纪芗,实用回归分析方法[M].上海:上海科学技术出版社.1990
    [139]崔托维奇.冻土上的地基与基础[M].北京:中国工业出版社.1964
    [140]汪仁和.李晓军.冻结温度场的叠加计算与计算机力法[J].安徽理工大学学报,2003.23(1):25-29
    [141]穆尔著.高会生,刘童娜.李聪聪译MATLAB实用教程(第二版)[M].北京:电子工业出版社.2010
    [142]王正林.精通MATLAB科学计算[M].北京:电r工业出版社.2009
    [143]蒋斌松.王金鸽.周国庆.单管冻结温度场解析计算[J].中国矿业大学学报.2009.38(4):4634-466
    [144]胡向东.何挺秀.多排管直线冻土墙平均温度的等效梯形计算方法[J].煤炭学报.2009.34(11):1465-1469
    [145]张向东,傅强.冻土三轴蠕变特性试验研究及平而冻土墙厚度的确定[J].岩土力学.2011.32(8):2261-2266
    [146]李东阳.冻土未冻水含量测试新方法的试验和理论研究[D].北京:中国矿业大学(北京).2011
    [147]刘鸿绪.对土冻结过程中若干冻胀力学问题的商榷[J].冰川冻土.]990.12(3):269-280
    [148]徐婕.詹士昌.量纲分析的基础及其应用研究[J].科技通报,2004.20(1):51-54
    [149]Liu Bo, Li Dongyang. A Simple test method to measure unfrozen water content in clay-water system[J]. Cold Regions Science and Technology,2012,2 doi:10.1016
    [150]Sanger F J. Ground Freezing in Construction[J]. Jounral of Soil Mechnical Foundation, Div. ASCE94 (SMI):58-131
    [151]Sanger F J, Sayles G K. Thermal and Geological Computations for Artificially Frozen Ground Construction[J]. Development in Geotechnical Engineering. Amsterdam:Elsevier. vol.26:311-317
    [152]苏立凡,陈湘生,王长生.地层冻结法在我国的应用和展望[R].煤炭建设科研40年.北京:煤炭工业出版社.1997:39-46
    []53]金永军,杨维好.直线形冻土墙动态温度场的试验研究[J].辽宁工程大学学报.2002.21(6):730-733
    [154]袁云辉,杨平,江天堑.复杂环境下浅埋暗挖隧道穿越富含水层冻结温度场研究[J].岩土力学.2011,31(8)suppl:388-393
    [155]周晓敏,苏立凡,贺长俊.北京地铁隧道水平冻结法施工[J].岩工程学报.1999.21(3):319-322
    [156]Ladanyi B. An Engineering Theory of Creep of Frozen Soil[J]. Canadian Geotechnical Journal,1972,9(1): 63-68
    [157]Tranaski V R. Wagner O B. On the Prediction of Hydraulic Conductivity of Frozen Soils[J]. Canadian Geotechnical Journal,1996,31(3):176-180
    [158]Oleg P, Istvan F. A Study of Freezing-melting Hysteresis of Water in Different Porous Materials[J]. Microporous and Mesoporous Materials,2011.138:221-227
    [159]杨诗秀,雷志栋,朱强.土壤冻结条件下水热耦合迁移数值模拟[J].清华大学学报,1982.28:112-120
    [160]赖远明.寒区隧道温度场、渗流场和应力场耦合问题的非线性分析[D].兰州:中国科学院兰州寒区旱区环境与工程研究所,1999
    [161]李洪升.刘增利,梁承姬.冻土水热力耦合作用的数学模型及数值模拟[J].力学学报,2001.33(5):621-629
    [162]李书谊.深厚表土双排孔冻结壁温度场规律研究lD].北京:北京科技大学.2008

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