To better analyze the effect of carbon fiber reinforcement for Nanwa tunnel as a case study, the reinforcement plans with different disease positions of tunnel lining and crack depths are simulated in ANSYS, and corresponding construction techniques and countermeasures are put forward. Analysis finds that only in plan 1 (when cracks of different depths exist on tunnel vault) and plan 2 (when cracks of different depths exist on both tunnel vault and sidewall), the deformation of lining increases obviously with the increase of crack depth before carbon fiber reinforcement, with the maximum displacement 5.81 mm in plan 1 at the center of the inverted arch and the maximum stress 18.80 MPa located in the foot of the arch. After carbon fiber reinforcement, the deformation of lining is greatly reduced, with the maximum displacement in plan 1 cut from 5.81 mm to 3.36 mm, declining by 42.2%, and the maximum displacement in plan 2 decreasing from 6.17 mm to 3.64 mm, dwindling by 41.0%. Result demonstrates that the carbon fiber reinforcement technology has good reinforcement effect on Nanwa tunnel.
Key words
carbon fiber reinforcement /
tunnel lining /
reinforcement /
construction technique /
numerical analysis /
deep crack /
displacement
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
[1] 孔凡水,左昌群,李涛,等.各向异性片岩隧道支护结构承载力学特性研究[J].长江科学院院报,2017,34(6):97-102.
[2] 张志成,唐德高,戎晓力,等.岩溶隧道含水裂缝扩展规律研究[J].长江科学院院报,2017,34(6):132-137,148.
[3] 周黎明,邱东明,付代光,等.TSP隧道超前地质预报技术及其3D成果研究与应用[J].长江科学院院报,2016,33(10):72-78.
[4] 杨忠敏. 碳纤维行业发展趋势分析[J].化学工业,2015,33(7):7-10,21.
[5] 贾良,聂红宾.CFRP布修复隧道中冻融损伤混凝土抗弯构件力学性能研究[J].隧道建设,2016,36(7):819-825.
[6] 张团结. 昌福铁路隧道病害整治[J].铁道建筑,2015,(2):79-81.
[7] 刘德军,黄宏伟,薛亚东,等. 纤维编织网增强混凝土补强隧道衬砌力学性能研究[J].工程力学,2014,31(7):91-98,111.
[8] 马志文. 朔黄线石河口隧道塌方冒顶整治[J].铁道建筑,2013,(10):55-57.
[9] HAMID N H, MOHAMAD M E, ZAINUDDIN M A.Repair and Retrofitting Bridge Pier Using CFRP and Tested Under In-plane Lateral Cyclic Loading[C]∥Proceedings of the International Civil and Infrastructure Engineering Conference 2015, 2016:183-197. doi: https:∥doi.org/10.1007/978-981-10-0155-0_18
[10] JU M K, OH H S, SIM J S.Indirect Fatigue Evaluation of CFRP-Reinforced Bridge Deck Slabsunder Variable Amplitude Cyclic Loading[J].KSCE Journal of Civil Engineering, 2017, 21(5):1783-1792.
[11] KHELIFA M, LAHOUAR M A, CELZARD A.Flexural Strengthening of Finger-jointed Spruce Timber Beams with CFRP[J]. Journal of Adhesion Science and Technology, 2015,29(19), 2104-2116.
[12] 吕西林. 建筑结构加固设计[M].北京:科学出版社,2001.
[13] JTG D70/2—2014,公路隧道设计规范[S].北京:人民交通出版社,2014.
[14] 宋战平,荆敏,韩日美,等. 基于强度安全系数概念的隧道衬砌结构优选设计[J].西安建筑科技大学学报(自然科学版),2010,(4):499-503,508.
[15] 夏铃. 公路隧道养护管理信息及其技术评价系统研究[D].重庆:重庆交通大学, 2011.
PDF(7531 KB)
