波纹钢板在隧道明洞结构中的应用研究
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摘要
为研究波纹钢拱圈式隧道明洞结构的力学性能,为该类型隧道明洞结构的应用提供理论依据,以某隧道窗孔式明洞为工程背景,采用有限元数值模拟方法进行受力分析。首先,分析明洞结构中基础底座、混凝土拱圈和波纹钢拱圈的应力分布特点;其次,从弯矩、轴力和位移3个方面研究波纹钢板的厚度对该明洞结构受力的影响;最后,从弯矩、轴力和位移3个方面研究钢拱圈不同矢跨比对该明洞结构受力的影响。研究结果表明:1)基础底座的内外墙根部截面应力较大,为结构受力最不利位置,混凝土拱圈和波纹钢拱圈在拱脚和拱顶附近位置处受力较大; 2)随着波纹钢板厚度的增加,内外墙底部截面的弯矩均有所减小;外墙底部截面的轴力有所减小,而内墙底部截面的轴力有所增加;钢拱圈的横向和竖向位移均有所减小; 3)随着钢拱圈矢跨比的减小,内外墙底部截面的弯矩不断增加,且内墙底部截面弯矩增加更为明显;内外墙底部截面的轴力不断减小;钢拱圈的横向位移不断减小,竖向位移出现先减小后增加的趋势。
In order to study mechanical characteristics of open tunnel structure with steel corrugated plate arch ring,and provide theory basis for application of this type of open tunnel structure. Taking an aperture open tunnel as engineering background,the finite element numerical simulation method is used to analyze the force. Firstly,the stress distribution characteristics of foundation base,concrete arch ring and steel corrugated arch ring are analyzed; Secondly,the influence of the thickness of steel corrugated plate on the force of the structure is studied from three aspects of bending moment,axial force and displacement; Finally,the influence of different rise-span ratio of steel arch ring on the stress of the open tunnel structure is studied from three aspects of bending moment,axial force and displacement. The results show that:( 1) The section stress at the root of the inner and outer walls of the foundation base is large,which is the most unfavorable position for the structural stress. The concrete arch ring and steel corrugated arch ring bear large stress near the arch foot and the arch roof;( 2) As the thickness of corrugated steel plate increases,the bending moment of the bottom section of the inner and outer walls decreases. The axial force of the bottom section of the outer wall decreases,while that of the bottom section of the inner wall increases. The horizontal and vertical displacements of the steel arch ring are reduced;( 3) With the decrease of the rise-span ratio of the steel arch ring,the bending moment of the bottom section of the inner and outer walls increases constantly,and the bending moment at the bottom of the inner walls increases more obviously. The axial force of the bottom section of the inner and outer wall decreases constantly. The transverse displacement of the steel arch ring decreases constantly,and the vertical displacement decreases first and then increases.
In order to study mechanical characteristics of open tunnel structure with steel corrugated plate arch ring,and provide theory basis for application of this type of open tunnel structure. Taking an aperture open tunnel as engineering background,the finite element numerical simulation method is used to analyze the force. Firstly,the stress distribution characteristics of foundation base,concrete arch ring and steel corrugated arch ring are analyzed; Secondly,the influence of the thickness of steel corrugated plate on the force of the structure is studied from three aspects of bending moment,axial force and displacement; Finally,the influence of different rise-span ratio of steel arch ring on the stress of the open tunnel structure is studied from three aspects of bending moment,axial force and displacement. The results show that:( 1) The section stress at the root of the inner and outer walls of the foundation base is large,which is the most unfavorable position for the structural stress. The concrete arch ring and steel corrugated arch ring bear large stress near the arch foot and the arch roof;( 2) As the thickness of corrugated steel plate increases,the bending moment of the bottom section of the inner and outer walls decreases. The axial force of the bottom section of the outer wall decreases,while that of the bottom section of the inner wall increases. The horizontal and vertical displacements of the steel arch ring are reduced;( 3) With the decrease of the rise-span ratio of the steel arch ring,the bending moment of the bottom section of the inner and outer walls increases constantly,and the bending moment at the bottom of the inner walls increases more obviously. The axial force of the bottom section of the inner and outer wall decreases constantly. The transverse displacement of the steel arch ring decreases constantly,and the vertical displacement decreases first and then increases.
引文
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[12]王玉锁,王涛,周良,等.跨中受落石冲击的拱形护桥明洞力学响应[J].隧道建设(中英文),2018,38(1):22.WANG Yusuo, WANG Tao, ZHOU Liang, et al.Mechanical responses of arched protection shed of bridgeunder rock-fall impaction on midspan of rooftop[J]. TunnelConstruction,2018,38(1):22.
[13]赖士谦.超厚回填土大跨明洞衬砌结构成拱效应分析[J].公路,2018(3):286.LAI Shiqian. Analysis of the arch effect of the liningstructure of super thick backfill large span open hole[J].Highway,2018(3):286.
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[15] DELHOMME F,MOMMESSIN M,MOUGIN J P,et al.Behavior of a structurally dissipating rock-shed:Experimental analysis and study of punching effects[J].International Journal of Solids and Structures,2005,42(14):4204.
[2]黄明琦,张明聚,李云超.厦门海底隧道明洞回填前后结构安全性分析[J].北京工业大学学报,2008,34(3):265.HUANG Mingqi, ZHANG Mingju, LI Yunchao. Thestructure safety analysis of cut-and-cover section of XiamenSub-sea Tunnel before and after backfilling[J]. Journal ofBeijing University of Technology,2008,34(3):265.
[3]赵峰,夏永旭,许东.桥隧相接隧道明洞稳定性研究[J].公路,2009(12):180.ZHAO Feng,XIA Yongxu,XU Dong. Study of stability oftunnel under bridge and tunnel[J]. Highway,2009(12):180.
[4]赵峰,夏永旭,许东.混合基础公路隧道明洞稳定性研究[J].公路,2010(5):102.ZHAO Feng,XIA Yongxu,XU Dong. Stability research oncut-and-cover highway tunnel with composite foundation[J].Highway,2010(5):102.
[5]王全才,王兰生,李宗有,等.都汶路恢复重建中的主要地震次生山地灾害与明洞工程[J].山地学报,2011,29(3):356.WANG Quancai,WANG Lansheng,LI Zongyou,et al. Opentunnel engineering and secondary disasters of earthquake inthe post-earthquake reconstruction projects along DuwenRoad[J]. Journal of Mountain Science,2011,29(3):356.
[6] WANG Yusuo,ZHANG Keyue,TANG Jianhui,et al. Modeltest research of the influences of rock-fall impaction onaccelerations of the cut-and-cover tunnel structure[J].Applied Mechanics and Materials,2011,117:206.
[7] WANG Yusuo,TANG Jianhui,YAN Tao,et al. Model testinvestigation of rock-fall impaction to cut-and-cover tunnelarch structure[J]. Applied Mechanics and Materials,2011,90:2492.
[8]匡亮,陈赤坤,谭永杰,等.沟谷山区城市超厚填土铁路明洞设计[J].铁道工程学报,2013,30(12):51.KUANG Liang,CHEN Chikun,TAN Yongjie,et al. Designof extra-high filling urban railway open cut tunnel in valleymountain area[J] Journal of Railway Engineering Society,2013,30(12):51.
[9]李盛,王起才,马莉,等.高填黄土明洞土拱效应及土压力减载模型分析[J].土木工程学报,2014(7):118.LI Sheng,WANG Qicai,MA Li,et al. Model analysis ofearth pressure load reduction and soil arch effect for high fillopen cut tunnel in loess area[J]. China Civil EngineeringJournal,2014(7):118.
[10]谭忠盛,李磊,孟德鑫,等.不同类型明洞结构的可靠度对比分析[J].铁道工程学报,2016,33(5):48.TAN Zhongsheng,LI Lei,MENG Dexin,et al. Reliabilityanalysis of different open cut tunnel[J]. Journal of RailwayEngineering Society,2016,33(5):48.
[11]王玉锁,周良,李正辉,等.落石冲击下单压式拱形明洞的力学响应[J].西南交通大学学报,2017,52(3):505.WANG Yusuo, ZHOU Liang, LI Zhenghui, et al.Mechanical responses of single-pressure arch-shaped opentunnel structure under rockfall impaction[J]. Journal ofSouthwest Jiaotong University,2017,52(3):505.
[12]王玉锁,王涛,周良,等.跨中受落石冲击的拱形护桥明洞力学响应[J].隧道建设(中英文),2018,38(1):22.WANG Yusuo, WANG Tao, ZHOU Liang, et al.Mechanical responses of arched protection shed of bridgeunder rock-fall impaction on midspan of rooftop[J]. TunnelConstruction,2018,38(1):22.
[13]赖士谦.超厚回填土大跨明洞衬砌结构成拱效应分析[J].公路,2018(3):286.LAI Shiqian. Analysis of the arch effect of the liningstructure of super thick backfill large span open hole[J].Highway,2018(3):286.
[14] MOUGIN J P,PERROTIN P,MOMMESSIN M,et al.Rock fall impact on reinforced concrete slab:anexperimental approach[J]. International Journal of ImpactEngineering,2005,31(2):169.
[15] DELHOMME F,MOMMESSIN M,MOUGIN J P,et al.Behavior of a structurally dissipating rock-shed:Experimental analysis and study of punching effects[J].International Journal of Solids and Structures,2005,42(14):4204.