摘要
研究目的:纤维混凝土在隧道黏滑断层抗错断设计方面鲜见报道,为提高跨黏滑断层隧道结构的安全性和稳定性,以某隧道F1黏滑断层段为研究背景,对跨黏滑断层隧道素混凝土与不同纤维混凝土衬砌结构条件下抗错断作用效果进行对比分析,以提出适宜黏滑断层隧道纤维混凝土衬砌抗错断技术。研究结论:(1)同体积纤维掺量条件下,SBFRC立方体抗压强度比SFRC略低,SBFRC抗折强度比SFRC略高,相差5%以内,SBFRC、SFRC抗压强度和抗折强度可近似相等;(2)断层黏滑错动对隧道上盘的影响大于隧道下盘;(3)下盘内纤维混凝土衬砌结构的抗错效果优于上盘,SFRC二衬平均抗错效果为12. 22%,SBFRC二衬平均抗错效果为15. 81%,SBFRC衬砌结构抗错断效果较SFRC抗错断效果提升29. 4%;(4)本研究成果对黏滑断层段隧道纤维混凝土衬砌设计具有指导意义。
Research purposes:Fiber reinforced concrete(FRC)has rarely been reported in the anti-dislocation design of viscous-slip faults in tunnels.In order to improve the safety and stability of tunnel structure across viscous-slip fault,taking F1 viscous-slip fault section of a tunnel as the research background,the anti-dislocation effect of plain concrete lining and different fiber reinforced concrete lining across viscous-slip fault is compared and analyzed,and the appropriate anti-dislocation technology of fiber reinforced concrete lining of viscous-slip fault tunnel is put forward.Research conclusions:(1)The compressive strength of SBFRC cube is slightly lower than that of SFRC,and the flexural strength of SBFRC is slightly higher than that of SFRC with the same volume of fiber content.Due to the difference is less than 5%,the compressive strength and flexural strength of SBFRC and SFRC can be approximately equal.(2)The effect of viscous-slip fault dislocation on hanging wall is larger than that of footwall.(3)The resisting dislocation effect of fiber reinforced concrete lining on the footwall of tunnel structure is better than that on hanging wall,the average resisting dislocation effect of SFRC secondary lining is 12.22%,and 15.81%for the SBFRC secondary lining.The resisting dislocation effect of SBFRC lining structure is 29.4%higher than that of SFRC.(4)The research results can provide a reference for the structural design and construction of the tunnel crossing viscous-slip fault.
作者
王道远
崔光耀
许海亮
张玉芬
马涛
WANG Daoyuan;CUI Guangyao;XU Hailiang;ZHAGN Yufen;MA Tao(Hebei Jiaotong Vocational and Technical College,Shijiazhuang,Hebei 050091,China;North China University of Technology,Beijing 100144,China;Hebei University of Technology,Tianjin 300401,China;China Railway Siyuan Survey and Design Group Co.Ltd,Wuhan,Hubei 610031,China)
出处
《铁道工程学报》
EI
北大核心
2019年第12期71-75,共5页
Journal of Railway Engineering Society
关键词
隧道
黏滑断层
纤维混凝土
抗错断
tunnel
viscous-slip fault
fiber reinforced concrete
resisting dislocation
