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浙江大学学报(工学版)
JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE)  2017, Vol. 51 Issue (12): 2355-2364    DOI: 10.3785/j.issn.1008-973X.2017.12.007
Civil and Traffic Engineering     
Experimental study on bearing capacity behavior of U-steel enclosed contractible support
LI Xue-feng1,2, WANG Cheng-bing1, WANG Hua-lao1, DIAO Bo2
1. Research Institute of Highway Ministry of Transportation, Beijing 100088, China;
2. School of Transportation Science and Engineering, Beihang University, Beijing 100191, China
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Abstract  

Multi-stage uniform loading were applied to three contractible U-steel enclosed horseshoe-shaped supports with different layouts of contractible joint through the laboratory model tests. The radial displacement at different points of steel-support and the sliding displacement of the overlap joint were recorded. Results show that, slide velocity of overlap joint determines the bearing capacity and deformation properties of the contractible steel-support; the bearing capacity shows more instability and the steel-support has strongly yielding deformation when the overlap joints slide quickly. The sliding characteristic of overlap joint is relevant with the combination of internal force of the joint's location on the enclosed contractible steel-support. With the loading increasing, vault joint slide firstly with high velocity, followed by the foot joint,while the bottom joint is most difficult to slide. The vault sinks remarkably when vault joint slides, so it is suggested that the contractible joint should be placed in the vault when the rock pressure in the vault is great. When the lateral rock pressure is much greater, the bottom joint should be arranged. All the contractible joint should be slid stably and effectively to ensure that the yielding support can work effectively without weakening the supporting force.

Received: 28 November 2016      Published: 22 November 2017
CLC:  TU39  
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Cite this article:

LI Xue-feng, WANG Cheng-bing, WANG Hua-lao, DIAO Bo. Experimental study on bearing capacity behavior of U-steel enclosed contractible support. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2017, 51(12): 2355-2364.

URL:

http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2017.12.007     OR     http://www.zjujournals.com/eng/Y2017/V51/I12/2355


U型钢封闭式可缩性钢架承载特性试验研究

通过室内模型试验对3榀不同位置设置可缩接头的U型钢马蹄形封闭可缩钢架进行分级均布加载，并采集不同荷载下钢架不同位置的径向位移及各接头滑移量.结果表明：1）接头滑移速率决定钢架承载力及其变形特性，接头快速滑移时钢架承载力不稳定性增加，让压变形明显；2）封闭可缩钢架接头滑移特性与接头处钢架内力组合有关，随总外荷载的增加，拱顶接头最先发生滑移且速率较快，其次为拱脚接头，拱底接头最难滑移；3）拱顶接头发生滑移时拱顶下沉最为明显，建议当围岩荷载顶压较大时优先在拱顶设置接头；当围岩侧压力较大时，宜在拱底设置接头；4）在不削弱钢架支护力的前提下保证所有可缩接头平稳有效滑移是充分发挥其让压支护性能的关键.

[1] 田洪铭.高地应力软岩隧道流变机理及合理支护研究[D].武汉:中国科学院武汉岩土力学研究所,2012:121-144. TIAN Hong-ming. Rheological mechanism of weak rock masses and its reasonable support under high in situ stress[D]. Wuhan:Chinese Academy of Sciences, Institute of Rock and Soil Mechanics, 2012:121-144.
[2] 刘建庄.U型钢支架屈曲机理及控制[D].徐州:中国矿业大学,2013:74-86. LIU Jian-zhuang, Controlling mechanism of U-steel frame buckling[D]. Xuzhou:China University of Mining and Technology, 2013:74-86.
[3] BONINI M, LANCELLOTTA G, BARLA G. State of stress in tunnel lining in squeezing rock conditions[J]. Rock Mechanics and Rock Engineering, 2013, 46(2):405-411.
[4] 关宝树.漫谈矿山法隧道技术第四讲:钢架[J].隧道建设,2016,36(2):123-130. GUAN Bao-shu. Tunneling by mining method:lecture IV:steel arc[J]. Tunnel Construction, 2016, 36(2):123-130.
[5] 汪波,王杰,吴德兴,等.让压支护技术在软岩大变形隧道中的应用探讨[J].公路交通科技,2015, 32(5):115-122. WANG Bo, WANG Jie, WU De-xing et al. Discussion on application of yielding supporting technology in large-deformation tunnel in soft rock[J]. Journal of Highway and Transportation Research and Development, 2015,32(5):115-122.
[6] 武涛.大断面软岩斜井支护支架选型优化研究[J].煤炭科学技术,2015, 43(12):18-22. WU Tao. Study on optimization of support selection for mine large cross section soft rock inclined shaft[J]. Coal Science and Technology, 2015, 43(12):18-22.
[7] 尤春安.U型钢可缩性支架的稳定性分析[J].岩石力学与工程学报,2002,21(11):1672-1675. YOU Chun-an. Stability analysis of U-steel yieldable support[J]. Chinese Journal of Rock Mechanics and Engineering, 2002, 21(11):1672-1675.
[8] 谢文兵,荆升国,王涛,等.U型钢支架结构稳定性及其控制技术[J].岩石力学与工程学报.2010, 29(增2):3743-3748. XIE Wen-bing, JING Sheng-guo, WANG Tao, et al. Structural stability of U-steel support and its control technology[J]. Chinese Journal of Rock Mechanics and Engineering, 2010, 29(Suppl.2):3743-3748.
[9] 蒋斌松,王渭明.可缩性金属支架的有限元计算[J].岩石力学与工程学报,1995,14(2):145-154. JIANG Bin-song, WANG Wei-ming. Finite element method of yieldable steel arch[J]. Chinese Journal of Rock Mechanics and Engineering, 1995, 14(2):145-154.
[10] 陈新年,王爱辉,张琨.U型钢支架-围岩应力耦合装置试验研究[J].煤炭科学技术,2013,41(12):4-7. CHEN Xin-nian,WANG Ai-hui,ZHANG Kun. Experimental research on coupling device of U-steel support surrounding rock stress[J]. Coal Science and Technology, 2013, 41(12):4-7.
[11] BONINI M, BARLA G. The Saint Martin La Porte.access adit (Lyon-Turin Base Tunnel) revisited[J]. Tunneling and Underground Space Technology, 2012, 30:38-54.
[12] 尤春安.U型钢可缩性支架的缩动分析[J].煤炭学报,1994,19(3):270-277. YOU Chun-an. Analysis of yielding of yieldableU-steel support[J]. Journal of China Coal Society, 1994, 19(3):270-277.
[13] RODRÍGUEZ R, DÍAZ-AGUADO M B. Deduction and use of an analytical expression for the characteristic curve of a support based on yielding steel ribs[J]. Tunneling and Underground Space Technology. 2013, 33:159-170.
[14] 陈建勋,楚锟,王天林.用收敛-约束法进行隧道初期支护设计[J].西安公路交通大学学报,2001,21(2):57-59. CHEN Jian-xun, CHU Kun, WANG Tian-lin. Supporting design of tunnel at initial stage with convergence-confinement method[J]. Journal of Xi'an Highway University, 2001, 21(2):57-59.
[15] 江贝.超大断面隧道软弱围岩约束混凝土控制机理及应用研究[D].济南:山东大学,2016:267-356. JIANG Bei. Control mechanism and application of confined concrete for super large section tunnel on weak surrounding rock[D]. Jinan:Shandong University, 2016:267-356.
[16] 陈炎光,陆世良.中国煤矿巷道围岩控制[M].北京:中国矿业大学出版社,1994:239-295
[17] BARLA G, BONINI M, SEMERARO M. Analysis of the behavior of a yield-control support system in squeezing rock[J]. Tunneling and Underground Space Technology, 2011, 26(1):146-154.
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