盾构隧道与地层相互作用的模型试验设计
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摘要
设计缩尺模型时,应使影响试验测试结果的主要因素满足相似关系,次要影响因素可以不满足相似关系,以最大限度地减小模型试验误差。当模型盾构隧道材料的弹性模量无法满足相似关系时,可以调整模型隧道的内径和管片厚度,使模型隧道横断面曲梁在相似的弯矩作用下产生相似的转角,以此作为管片厚度设计要求;模型隧道材料的密度可以不满足相似关系。开槽模型管片纵缝接头的转动刚度可控性良好,建议用于模型盾构隧道管片环。模型土的黏聚力与内摩擦角可以不满足相似关系;模型土的压缩模量与实际土体的压缩模量应保持相似关系,模型土取压应力(100/Cσ)kPa到(200/Cσ)kPa时对应的压缩模量。
In order to minimize model test error,during the design of a scale model,the major factors that affect the scale model test results should meet the similarity relationship,and the minor influence factors may not necessarily meet the similarity relationship.When the elasticity modulus of the model shield tunnel mate-rial is unable to meet the similarity relationship,the inner diameter and the thickness of the model shield tunnel segment can be adjusted to cause the cross-section curved beam of the model shield tunnel to generate a similar rotational angle under similar bending moment as the segment thickness design requirement.Besides,the density of the model shield tunnel material may not necessarily meet the similarity relationship.The rotational stiffness of the longitudinal joints of the grooved model segments demonstrates good controllability.The grooved model segment longitudinal joint is suggested to be used in model shield tunnel segment ring.The cohesive force and angle of internal friction of model soil may not necessarily meet the similarity relationship.However,the compression modulus of model soil and the compression modulus of the actual soil should maintain a similarity relationship.The test pressure of compression modulus of model soil is from(100/Cσ)kPa to(200/Cσ)kPa.
In order to minimize model test error,during the design of a scale model,the major factors that affect the scale model test results should meet the similarity relationship,and the minor influence factors may not necessarily meet the similarity relationship.When the elasticity modulus of the model shield tunnel mate-rial is unable to meet the similarity relationship,the inner diameter and the thickness of the model shield tunnel segment can be adjusted to cause the cross-section curved beam of the model shield tunnel to generate a similar rotational angle under similar bending moment as the segment thickness design requirement.Besides,the density of the model shield tunnel material may not necessarily meet the similarity relationship.The rotational stiffness of the longitudinal joints of the grooved model segments demonstrates good controllability.The grooved model segment longitudinal joint is suggested to be used in model shield tunnel segment ring.The cohesive force and angle of internal friction of model soil may not necessarily meet the similarity relationship.However,the compression modulus of model soil and the compression modulus of the actual soil should maintain a similarity relationship.The test pressure of compression modulus of model soil is from(100/Cσ)kPa to(200/Cσ)kPa.
引文
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[14]Climent Molins,Oriol Arnau.Experimental and Analytical Study of the Structural Response of Segmental Tunnel Linings Based on an In situ Loading Test.Part 1:Test Configuration and Execution[J].Tunnelling and Underground Space Technology,2011,26(6):764-777.
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[16]郭璇,朱坤,张晓新,等.双圆盾构隧道-软土层相互作用规律的模型试验及响应分析[J].铁道学报,2016,38(9):101-108.GUO Xuan,ZHU Kun,ZHANG Xiaoxin,et al.DOT Model Test and Interactive Response Analysis of Soft Soil Layer to Double Circular Shield Tunnel[J].Journal of the China Railway Society,2016,38(9):101-108.
[17]黄大维,李晓龙,陈翰,等.圆环径向弯曲模量测量装置与测量方法:中国,CN1039401678A[P].2016-06-22.
[18]黄大维,周顺华,冯青松,等.通缝拼装盾构隧道横向刚度有效率计算方法及其影响因素[J].中国铁道科学,2017,38(3):47-54.HUANG Dawei,ZHOU Shunhua,FENG Qingsong,et al.Calculation Method for Transverse Effective Rigidity Ratio of Shield-driven Tunnel with Straight Joint and Its Influential Factors[J].China Railway Science,2017,38(3):47-54.
[19]黄大维,周顺华,王秀志,等.模型盾构隧道管片纵缝接头设计方法[J].岩土工程学报,2015,37(6):1068-1076.HUANG Dawei,ZHOU Shunhua,WANG Xiuzhi,et al.Design Method for Longitudinal Segment Joints of Shield Tunnel Model[J].Chinese Journal of Geotechnical Engineering,2015,37(6):1068-1076.
[20]黄大维,周顺华,冯青松,等.软土地区通缝拼装地铁盾构隧道管片纵缝接头优化[J].中国铁道科学,2017,38(5):62-69.HUANG Dawei,ZHOU Shunhua,FENG Qingsong,et al.Optimization for Longitudinal Segment Joint of Metro Shield Tunnel with Straight Joint in Soft Soil Area[J].China Railway Science,2017,38(5):62-69.
[21]毕湘利,柳献,王秀志,等.通缝拼装盾构隧道结构极限承载力的足尺试验研究[J].土木工程学报,2014,47(10):117-127.BI Xiangli,LIU Xian,WANG Xiuzhi,et al.Experimental Investigation on the Ultimate Bearing Capacity of Continuous-jointed Segmental Tunnel Linings[J].China Civil Engineering Journal,2014,47(10):117-127.
[22]郭瑞,何川,封坤,等.弱抗力地层盾构隧道失稳破坏的模型试验研究[J].铁道学报,2015,37(3):72-78.GUO Rui,HE Chuan,FENG Kun,et al.Model Test Study on Instability Failure of Shield Tunnel under Weak Resistance Strata[J].Journal of the China Railway Society,2015,37(3):72-78.
[23]陈帅,杨智春,李斌.结构试验中均布载荷的气囊加载系统设计方法[J].工程力学,2012,29(6):146-150.CHEN Shuai,YANG Zhichun,LI Bin.Design Method of Uniform Loading System Using Airbags in Structure Test[J].Engineering Mechanics,2012,29(6):146-150.
[24]徐国文,王士民,代光辉,等.基于内外分区割槽方式的盾构隧道接头环向模拟方法研究[J].铁道学报,2016,38(4):90-97.XU Guowen,WANG Shimin,DAI Guanghui,et al.Research on Radial Joint Simulation Method for Shield Tunnel Based on Inner and Peripheral Zoning Slotting[J].Journal of the China Railway Society,2016,38(4):90-97.
[2]吴庆,杜守继.地面堆载对既有盾构隧道结构影响的试验研究[J].地下空间与工程学报,2014,10(1):57-66.WU Qing,DU Shouji.Model Test on Influence of Ground Heaped Load on Existing Shield Tunnel Structure[J].Chinese Journal of Underground Space and Engineering,2014,10(1):57-66.
[3]王如路,张冬梅.超载作用下软土盾构隧道横向变形机理及控制指标研究[J].岩土工程学报,2013,35(6):1092-1101.WANG Rulu,ZHANG Dongmei.Mechanism of Transverse Deformation and Assessment Index for Shield Tunnels in Soft Clay under Surface Surcharge[J].Chinese Journal of Geotechnical Engineering,2013,35(6):1092-1101.
[4]HUANG H W,ZHANG D M.Resilience Analysis of Shield Tunnel Lining under Extreme Surcharge:Characterization and Field Application[J].Tunnelling and Underground Space Technology,2016,51:301-312.
[5]邵华,黄宏伟,张东明,等.突发堆载引起软土地铁盾构隧道大变形整治研究[J].岩土工程学报,2016,38(6):1036-1043.SHAO Hua,HUANG Hongwei,ZHANG Dongming,et al.Case Study on Repair Work for Excessively Deformed Shield Tunnel under Accidental Surface Surcharge in Soft Clay[J].Chinese Journal of Geotechnical Engineering,2016,38(6):1036-1043.
[6]中华人民共和国住房和城乡建设部.GB 50157—2013地铁设计规范[S].北京:中国建筑工业出版社,2014.
[7]ZHANG Z G,HUANG M S.Geotechnical Influence on Existing Subway Tunnels Induced by Multiline Tunneling in Shanghai Soft Soil[J].Computer Geotechnics,2014,56:121-132.
[8]宋锦虎,陈坤福,李宁娜,等.水土耦合对盾构土拱效应及最小支护力的影响分析[J].铁道学报,2015,37(10):122-128.SONG Jinhu,CHEN Kunfu,LI Ningna,et al.Analysis of Effects of Soil and Ground Water Coupling on Soil Arching and Minimum Face Pressure in Shield Tunneling[J].Journal of the China Railway Society,2015,37(10):122-128.
[9]李春良,王方彦,张立辉,等.复杂条件下的地铁盾构隧道的力学行为研究[J].铁道学报,2016,38(5):103-109.LI Chunliang,WANG Fangyan,ZHANG Lihui,et al.Study on Mechanical Behavior of Metro Shield Tunnel under Complex Conditions[J].Journal of the China Railway Society,2016,38(5):103-109.
[10]周俊宏,宫全美,周顺华.基于透明土的隧道上浮过程结构与土相互作用模型试验[J].华东交通大学学报,2016,33(3):1-6.ZHOU Junhong,GONG Quanmei,ZHOU Shunhua.Model Test on Upward Moving Tunnel and Soil Interaction Using Transparent Soil[J].Journal of East China Jiaotong University,2016,33(3):1-6.
[11]徐挺.相似理论与模型试验[M].北京:中国农业机械出版社,1982.
[12]杨俊杰.相似理论与结构模型试验[M].武汉:武汉理工大学出版社,1999.
[13]袁文忠.相似理论与静力学模型试验[M].成都:西南交通大学出版社,1998.
[14]Climent Molins,Oriol Arnau.Experimental and Analytical Study of the Structural Response of Segmental Tunnel Linings Based on an In situ Loading Test.Part 1:Test Configuration and Execution[J].Tunnelling and Underground Space Technology,2011,26(6):764-777.
[15]包世华.结构力学[M].2版.武汉:武汉理工大学出版社,2003.
[16]郭璇,朱坤,张晓新,等.双圆盾构隧道-软土层相互作用规律的模型试验及响应分析[J].铁道学报,2016,38(9):101-108.GUO Xuan,ZHU Kun,ZHANG Xiaoxin,et al.DOT Model Test and Interactive Response Analysis of Soft Soil Layer to Double Circular Shield Tunnel[J].Journal of the China Railway Society,2016,38(9):101-108.
[17]黄大维,李晓龙,陈翰,等.圆环径向弯曲模量测量装置与测量方法:中国,CN1039401678A[P].2016-06-22.
[18]黄大维,周顺华,冯青松,等.通缝拼装盾构隧道横向刚度有效率计算方法及其影响因素[J].中国铁道科学,2017,38(3):47-54.HUANG Dawei,ZHOU Shunhua,FENG Qingsong,et al.Calculation Method for Transverse Effective Rigidity Ratio of Shield-driven Tunnel with Straight Joint and Its Influential Factors[J].China Railway Science,2017,38(3):47-54.
[19]黄大维,周顺华,王秀志,等.模型盾构隧道管片纵缝接头设计方法[J].岩土工程学报,2015,37(6):1068-1076.HUANG Dawei,ZHOU Shunhua,WANG Xiuzhi,et al.Design Method for Longitudinal Segment Joints of Shield Tunnel Model[J].Chinese Journal of Geotechnical Engineering,2015,37(6):1068-1076.
[20]黄大维,周顺华,冯青松,等.软土地区通缝拼装地铁盾构隧道管片纵缝接头优化[J].中国铁道科学,2017,38(5):62-69.HUANG Dawei,ZHOU Shunhua,FENG Qingsong,et al.Optimization for Longitudinal Segment Joint of Metro Shield Tunnel with Straight Joint in Soft Soil Area[J].China Railway Science,2017,38(5):62-69.
[21]毕湘利,柳献,王秀志,等.通缝拼装盾构隧道结构极限承载力的足尺试验研究[J].土木工程学报,2014,47(10):117-127.BI Xiangli,LIU Xian,WANG Xiuzhi,et al.Experimental Investigation on the Ultimate Bearing Capacity of Continuous-jointed Segmental Tunnel Linings[J].China Civil Engineering Journal,2014,47(10):117-127.
[22]郭瑞,何川,封坤,等.弱抗力地层盾构隧道失稳破坏的模型试验研究[J].铁道学报,2015,37(3):72-78.GUO Rui,HE Chuan,FENG Kun,et al.Model Test Study on Instability Failure of Shield Tunnel under Weak Resistance Strata[J].Journal of the China Railway Society,2015,37(3):72-78.
[23]陈帅,杨智春,李斌.结构试验中均布载荷的气囊加载系统设计方法[J].工程力学,2012,29(6):146-150.CHEN Shuai,YANG Zhichun,LI Bin.Design Method of Uniform Loading System Using Airbags in Structure Test[J].Engineering Mechanics,2012,29(6):146-150.
[24]徐国文,王士民,代光辉,等.基于内外分区割槽方式的盾构隧道接头环向模拟方法研究[J].铁道学报,2016,38(4):90-97.XU Guowen,WANG Shimin,DAI Guanghui,et al.Research on Radial Joint Simulation Method for Shield Tunnel Based on Inner and Peripheral Zoning Slotting[J].Journal of the China Railway Society,2016,38(4):90-97.