裂缝长度对盾构隧道管片结构破坏模式模型试验研究
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摘要
依托国内某地铁区间盾构隧道工程,采用相似模型试验的方法,通过对盾构隧道管片的声发射数据、管片衬砌位移及破坏过程素描等数据的分析,研究不同裂缝长度条件下管片衬砌在外荷载作用下的力学响应及其承载性能。研究结果表明:裂缝的存在降低了结构整体刚度,裂缝长度对管片衬砌结构的力学特性具有显著影响,1/3幅宽是裂缝长度对管片衬砌结构力学性能影响的分界点;当裂缝长度大于1/3幅宽时,随裂缝长度增加,相同荷载条件下管片椭圆扁平率急剧增大,结构的极限承载力逐渐降低,结构的失稳破坏趋于突发性破坏。
Based on a domestic metro shield tunnel section project, this paper studies the mechanical response and bearing capacity of lining segments with different crack length under external loads by conducting a series of model tests and analyzing acoustic emission data, values of displacement and failure process sketch of lining segments. The results indicate that the existence of cracks reduces the overall stiffness of structure. The length of cracks has a significant impact on the mechanical properties of lining segments. The turning point for the influence of the crack length on the mechanical properties of the lining structure occurs at the 1/3 of the segment width. If the crack length is greater than 1/3 of the segment width, with the increase of the crack length, the elliptical flattening rate of the segment gains sharply under the same load. This phenomenon results in the gradual decline of the ultimate bearing capacity and the increase of the chances of sudden failure.
Based on a domestic metro shield tunnel section project, this paper studies the mechanical response and bearing capacity of lining segments with different crack length under external loads by conducting a series of model tests and analyzing acoustic emission data, values of displacement and failure process sketch of lining segments. The results indicate that the existence of cracks reduces the overall stiffness of structure. The length of cracks has a significant impact on the mechanical properties of lining segments. The turning point for the influence of the crack length on the mechanical properties of the lining structure occurs at the 1/3 of the segment width. If the crack length is greater than 1/3 of the segment width, with the increase of the crack length, the elliptical flattening rate of the segment gains sharply under the same load. This phenomenon results in the gradual decline of the ultimate bearing capacity and the increase of the chances of sudden failure.
引文
[1]杨亚新,任志华,张森.纵向裂缝对山岭隧道衬砌结构安全性的影响分析[J].公路交通科技,2017,13(6):282-284.YANG Yaxin,REN Zhihua,ZHANG Sen.Influence of longitudinal cracks on safety of lining structure of mountain tunnel[J].Journal of Highway and Transportation Research and Development,2017,13(6):282-284.
[2]于玲,陈录,包龙生.山岭隧道衬砌裂损分析及加固研究[J].公路交通科技,2016,12(2):161-164.YU Ling,CHEN Lu,BAO Longsheng.Analysis and reinforcement study on lining crack of mountain tunnel[J].Journal of Highway and Transportation Research and Development,2016,12(2):161-164.
[3]张建刚,何川,肖明清.大型管片衬砌结构受千斤顶推力作用的裂缝分析[J].铁道建筑,2008(4):28-31.ZHANG Jiangang,HE Chuan,XIAO Mingqing.Analysis of cracks in thrusting effect of large segmental lining structures[J].Railway Engineering,2008(4):28-31.
[4]BIAN Kang,LIU Jian,XIAO Ming,et al.Cause investigation and verification of lining cracking of bifurcation tunnel at Huizhou Pumped Storage Power Station[J].Tunnelling and Underground Space Technology,2016,54:123-134.
[5]张素磊,张顶立,刘昌.公路运营隧道衬砌裂缝长期监测及分析[J].现代隧道技术,2017,54(3):17-25.ZHANG Sulei,ZHANG Dingli,LIU Chang.Long-term monitoring and analysis of lining cracks in operating highway tunnels[J].Modern Tunnelling Technology,2017,54(3):17-25.
[6]林楠,李攀,谢雄耀.盾构隧道结构病害及其机理研究[J].地下空间与工程学报,2015,11(S2):802-809.LIN Nan,LI Pan,XIE Xiongyao.Research on evolution mechanism of shield tunnel disease based on segment performance analysis[J].Chinese Journal of Underground Space and Engineering,2015,11(S2):802-809.
[7]王士民,于清洋,彭博,等.封顶块位置对盾构隧道管片结构力学特征与破坏形态的影响分析[J].土木工程学报,2016,49(6):123-132.WANG Shimin,YU Qingyang,PENG Bo,et al.Analysis of mechanical characteristics and failure pattern of shield tunnel segment with different position of key block[J].China Civil Engineering Journal,2016,49(6):123-132.
[8]胡志平,彭建兵,王启耀,等.盾构隧道60°斜穿地裂缝的变形破坏机制试验研究[J].岩石力学与工程学报,2010,29(1):176-183.HU Zhiping,PENG Jianbing,WANG Qiyao,et al.Modeling Test research on failure mechanism of shield tunnel crossing ground fissure with 60o[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(1):176-183.
[9]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.
[10]刘四进,何川,封坤,等.受荷状态下盾构隧道管片锈蚀劣化破坏过程研究[J].土木工程学报,2018,51(6):120-128.LIU Sijin,HE Chuan,FENG Kun,et al.Research on corrosion deterioration and failure process of shield tunnel segments under loads[J].China Civil Engineering Journal,2018,51(6):120-128.
[11]王士民,于清洋,彭博,等.空洞对盾构隧道结构受力与破坏影响模型试验研究[J].岩土工程学报,2017,39(1):89-98.WANG Shimin,YU Qingyang,PENG Bo,et al.Model tests on influences of cavity defects on mechanical characteristics and failure laws of segment linings of shield tunnels[J].Chinese Journal of Geotechnical Engineering,2017,39(1):89-98.
[12]LEUNG C,MEGUID M A.An experimental study of the effect of local contact loss on the earth pressure distribution on existing tunnel linings[J].Tunnelling and Underground Space Technology,2011,26(1):139-145
[13]LEI Mingfeng,PENG Limin,SHI Chenghua.Model test to investigate the failure mechanisms and lining stress characteristics of shallow buried tunnels under unsymmetrical loading[J].Tunnelling and Underground Space Technology,2015,46:64-75.
[14]FENG Kun,HE Chuan,QIU Yue,et al.Full-scale tests on bending behavior of segmental joints for large underwater shield tunnels[J].Tunnelling and Underground Space Technology,2018,75:100-116.
[15]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 ring simulation method of shield tunnel based on internal and external slotting[J].Journal of Railway Society,2016,38(4):90-97.
[16]唐志成,何川,林刚.地铁盾构隧道管片结构力学行为模型试验研究[J].岩土工程学报,2005,27(1):85-89.TANG Zhicheng,HE Chuan,LIN Gang.Study on mechanical behavior of segment shield tunnel of metro with model test[J].Journal of Geotechnical Engineering,2005,27(1):85-89.
[17]西南交通大学.福州地铁越江盾构隧道建设关键技术研究[R].成都:西南交通大学土木工程学院,2017:320-333.Southwest Jiaotong University.Key technology of the rivercrossing shield tunnel construction in Fuzhou Metro[R].Chengdu:Southwest Jiaotong University.School of Civil Engineering,2017:320-333.
[18]何川,刘川昆,王士民,等.裂缝数量对盾构隧道管片结构力学性能的影响[J].中国公路学报,2018,31(10):210-219.HE Chuan,LIU Chuankun,WANG Shimin,et al.Influence of crack number on mechanical properties of shield tunnel segment structure[J].China Journal of Highway and Transport,2018,31(10):210-219.
[2]于玲,陈录,包龙生.山岭隧道衬砌裂损分析及加固研究[J].公路交通科技,2016,12(2):161-164.YU Ling,CHEN Lu,BAO Longsheng.Analysis and reinforcement study on lining crack of mountain tunnel[J].Journal of Highway and Transportation Research and Development,2016,12(2):161-164.
[3]张建刚,何川,肖明清.大型管片衬砌结构受千斤顶推力作用的裂缝分析[J].铁道建筑,2008(4):28-31.ZHANG Jiangang,HE Chuan,XIAO Mingqing.Analysis of cracks in thrusting effect of large segmental lining structures[J].Railway Engineering,2008(4):28-31.
[4]BIAN Kang,LIU Jian,XIAO Ming,et al.Cause investigation and verification of lining cracking of bifurcation tunnel at Huizhou Pumped Storage Power Station[J].Tunnelling and Underground Space Technology,2016,54:123-134.
[5]张素磊,张顶立,刘昌.公路运营隧道衬砌裂缝长期监测及分析[J].现代隧道技术,2017,54(3):17-25.ZHANG Sulei,ZHANG Dingli,LIU Chang.Long-term monitoring and analysis of lining cracks in operating highway tunnels[J].Modern Tunnelling Technology,2017,54(3):17-25.
[6]林楠,李攀,谢雄耀.盾构隧道结构病害及其机理研究[J].地下空间与工程学报,2015,11(S2):802-809.LIN Nan,LI Pan,XIE Xiongyao.Research on evolution mechanism of shield tunnel disease based on segment performance analysis[J].Chinese Journal of Underground Space and Engineering,2015,11(S2):802-809.
[7]王士民,于清洋,彭博,等.封顶块位置对盾构隧道管片结构力学特征与破坏形态的影响分析[J].土木工程学报,2016,49(6):123-132.WANG Shimin,YU Qingyang,PENG Bo,et al.Analysis of mechanical characteristics and failure pattern of shield tunnel segment with different position of key block[J].China Civil Engineering Journal,2016,49(6):123-132.
[8]胡志平,彭建兵,王启耀,等.盾构隧道60°斜穿地裂缝的变形破坏机制试验研究[J].岩石力学与工程学报,2010,29(1):176-183.HU Zhiping,PENG Jianbing,WANG Qiyao,et al.Modeling Test research on failure mechanism of shield tunnel crossing ground fissure with 60o[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(1):176-183.
[9]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.
[10]刘四进,何川,封坤,等.受荷状态下盾构隧道管片锈蚀劣化破坏过程研究[J].土木工程学报,2018,51(6):120-128.LIU Sijin,HE Chuan,FENG Kun,et al.Research on corrosion deterioration and failure process of shield tunnel segments under loads[J].China Civil Engineering Journal,2018,51(6):120-128.
[11]王士民,于清洋,彭博,等.空洞对盾构隧道结构受力与破坏影响模型试验研究[J].岩土工程学报,2017,39(1):89-98.WANG Shimin,YU Qingyang,PENG Bo,et al.Model tests on influences of cavity defects on mechanical characteristics and failure laws of segment linings of shield tunnels[J].Chinese Journal of Geotechnical Engineering,2017,39(1):89-98.
[12]LEUNG C,MEGUID M A.An experimental study of the effect of local contact loss on the earth pressure distribution on existing tunnel linings[J].Tunnelling and Underground Space Technology,2011,26(1):139-145
[13]LEI Mingfeng,PENG Limin,SHI Chenghua.Model test to investigate the failure mechanisms and lining stress characteristics of shallow buried tunnels under unsymmetrical loading[J].Tunnelling and Underground Space Technology,2015,46:64-75.
[14]FENG Kun,HE Chuan,QIU Yue,et al.Full-scale tests on bending behavior of segmental joints for large underwater shield tunnels[J].Tunnelling and Underground Space Technology,2018,75:100-116.
[15]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 ring simulation method of shield tunnel based on internal and external slotting[J].Journal of Railway Society,2016,38(4):90-97.
[16]唐志成,何川,林刚.地铁盾构隧道管片结构力学行为模型试验研究[J].岩土工程学报,2005,27(1):85-89.TANG Zhicheng,HE Chuan,LIN Gang.Study on mechanical behavior of segment shield tunnel of metro with model test[J].Journal of Geotechnical Engineering,2005,27(1):85-89.
[17]西南交通大学.福州地铁越江盾构隧道建设关键技术研究[R].成都:西南交通大学土木工程学院,2017:320-333.Southwest Jiaotong University.Key technology of the rivercrossing shield tunnel construction in Fuzhou Metro[R].Chengdu:Southwest Jiaotong University.School of Civil Engineering,2017:320-333.
[18]何川,刘川昆,王士民,等.裂缝数量对盾构隧道管片结构力学性能的影响[J].中国公路学报,2018,31(10):210-219.HE Chuan,LIU Chuankun,WANG Shimin,et al.Influence of crack number on mechanical properties of shield tunnel segment structure[J].China Journal of Highway and Transport,2018,31(10):210-219.
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