新管幕结构受力模式及关键技术分析
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摘要
沈阳地铁九号线奥体中心站采用Steel Tube Slab管幕工法建造覆土超浅埋暗挖地铁车站.对新管幕结构的纵向和横向受力模式进行研究,阐述了管幕结构的作用机理,并对管幕结构的抗弯承载力和抗剪承载力计算理论进行讨论,给出了相应的计算公式.结合奥体中心的施工工况,对管幕结构的内力进行计算.随着右侧导洞贯通时,与左侧导洞相比较,跨中正弯矩增加8%,最大负弯矩减小17. 8%.管幕结构沿纵向跨中最大变形为6. 46 mm.研究结果对新管幕工法的应用和推广具有参考意义.
Steel tube slab( STS) method is addopted to construct the ultra-shallow-buried subway station of the Aoti Central station,line 9 in Shenyang. The longitudinal and lateral mechanical characteristics of STS structure were investigated,and the interaction mechanism was elaborated;then,the calculation theory of bearing flexural capacity and shear capacity were discussed,and the relative formulas were presented. According to the construction condition,the internal force of STS structure during the construction was calculated. Compared with the left pilot tunnel,the positive mid-span bending moment of the supporting structure increases by 8% when the construction of right pilot tunnel is completed,and the maximum negative bending moment decreases by 17. 8%. The maximum deformation of the longitudinal mid-span is 6. 46 mm. The results can provide some important references for the application and promotion of STS.
Steel tube slab( STS) method is addopted to construct the ultra-shallow-buried subway station of the Aoti Central station,line 9 in Shenyang. The longitudinal and lateral mechanical characteristics of STS structure were investigated,and the interaction mechanism was elaborated;then,the calculation theory of bearing flexural capacity and shear capacity were discussed,and the relative formulas were presented. According to the construction condition,the internal force of STS structure during the construction was calculated. Compared with the left pilot tunnel,the positive mid-span bending moment of the supporting structure increases by 8% when the construction of right pilot tunnel is completed,and the maximum negative bending moment decreases by 17. 8%. The maximum deformation of the longitudinal mid-span is 6. 46 mm. The results can provide some important references for the application and promotion of STS.
引文
[1] Musso G. Jacked pipe provides roof for underground construction in busy urban area[J]. Civil Engineering,1979,49(11):79-82.
[2] Hemerijckx I E. Tubular trust jacking for underground roof construction on the Antwerp Metro[J]. Tunnelling,1985(5):13-15.
[3] Rhodes G W,Kauschinger J L. Microtunnelling provides structural support for large tunnels with shallow cover[C]//North American Tunneling. Rotterdam:Balkema AA,1996:443-449.
[4] Kaneke M,Sibata Y,Katou K. The construction of large section tunnel under highway using FJ method in Oosawa Narita Line[J]. Civil Construction,2003, 41:2-9.
[5] Bito Y. Construction methods of the structures passing through under railway lines[J]. Japanese Railway Engineering,1987,4(26):6-9.
[6]肖世国,李向阳,夏才初,等.管幕内顶进箱型时顶部管幕力学作用的试验研究[J].现代隧道技术,2006,43(1):22-28.(Xiao Shi-guo,Li Xiang-yang,Xia Cai-chu, et al. Study on the behavior of the upper pipe-curtain during the advance of a box culvert with in pipe-curtails by a model test[J]. Modern Tunnelling Technology,2006,43(1):22-28.)
[7]赵文,贾鹏蛟,王连广,等.地铁车站STS新管幕构件抗弯承载力试验研究[J].工程力学, 2016,33(8):167-176.(Zhao Wen, Jia Peng-jiao,Wang Lian-guang, et al.Experimental study on the flexural capacity of steel tube slab members of subway station[J]. Engineering Mechanics, 2016,33(8):167-176.)
[8] Jiang B F,Jia P J,Zhao W,et al. The application of compressive sampling in rapid ultrasonic computerized tomography(UCT)technique of steel tube slab(STS)[J]. Plos One,2018,13(1):1-15.
[9] Jia P J,Zhao W,Chen Y, et al. A case study on the application of the steel tube slab structure in construction of a subway station[J]. Applied Sciences,2018,8(9):1437.
[10] Furlong R W. Strength of steel encased concrete beam columns[J]. Journal of Structural Division,ASCE, 1967,93(5):113-124.
[11]钟善桐.钢管混凝土刚度的分析[J].哈尔滨建筑大学学报,1999,32(3):13-18.(Zhong Shan-tong. Analysis of rigidity for concrete filled steel tube[J]. Journal of Harbin University of Civil and Architecture,1999,32(3):13-18.)
[2] Hemerijckx I E. Tubular trust jacking for underground roof construction on the Antwerp Metro[J]. Tunnelling,1985(5):13-15.
[3] Rhodes G W,Kauschinger J L. Microtunnelling provides structural support for large tunnels with shallow cover[C]//North American Tunneling. Rotterdam:Balkema AA,1996:443-449.
[4] Kaneke M,Sibata Y,Katou K. The construction of large section tunnel under highway using FJ method in Oosawa Narita Line[J]. Civil Construction,2003, 41:2-9.
[5] Bito Y. Construction methods of the structures passing through under railway lines[J]. Japanese Railway Engineering,1987,4(26):6-9.
[6]肖世国,李向阳,夏才初,等.管幕内顶进箱型时顶部管幕力学作用的试验研究[J].现代隧道技术,2006,43(1):22-28.(Xiao Shi-guo,Li Xiang-yang,Xia Cai-chu, et al. Study on the behavior of the upper pipe-curtain during the advance of a box culvert with in pipe-curtails by a model test[J]. Modern Tunnelling Technology,2006,43(1):22-28.)
[7]赵文,贾鹏蛟,王连广,等.地铁车站STS新管幕构件抗弯承载力试验研究[J].工程力学, 2016,33(8):167-176.(Zhao Wen, Jia Peng-jiao,Wang Lian-guang, et al.Experimental study on the flexural capacity of steel tube slab members of subway station[J]. Engineering Mechanics, 2016,33(8):167-176.)
[8] Jiang B F,Jia P J,Zhao W,et al. The application of compressive sampling in rapid ultrasonic computerized tomography(UCT)technique of steel tube slab(STS)[J]. Plos One,2018,13(1):1-15.
[9] Jia P J,Zhao W,Chen Y, et al. A case study on the application of the steel tube slab structure in construction of a subway station[J]. Applied Sciences,2018,8(9):1437.
[10] Furlong R W. Strength of steel encased concrete beam columns[J]. Journal of Structural Division,ASCE, 1967,93(5):113-124.
[11]钟善桐.钢管混凝土刚度的分析[J].哈尔滨建筑大学学报,1999,32(3):13-18.(Zhong Shan-tong. Analysis of rigidity for concrete filled steel tube[J]. Journal of Harbin University of Civil and Architecture,1999,32(3):13-18.)