偏压大跨小净距公路隧道施工力学行为

doi:10.6040/j.issn.1672-3961.0.2019.307

摘要/Abstract

摘要： 为分析偏压大跨小净距隧道施工力学行为,采用FLAC3D有限差分数值模拟软件,针对偏压大跨小净距隧道在施工过程中的应力应变变化规律和施工方法比对、选择,开展现场监测数据对比论证与数值模拟计算分析。研究结果表明:由于偏压的影响,左线隧道的沉降、应力和受力均要大于右线隧道;开挖完成后左右线隧道拱顶和拱腰处的主应力会大幅度增加,造成隧道衬砌结构的剪应力也随之增大,同时也增大了两隧道间夹岩的主应力和剪应力,最终两隧道拱腰处应力集中明显;相比于左线隧道,右线隧道的开挖对左线隧道的弯矩影响更大,尤其是左线靠近右线隧道一侧拱腰的弯矩。其结果能够为偏压大跨小净距公路隧道的设计和施工提供了科学依据。

关键词: 偏压, 大跨小净距, 公路隧道, 数值模拟, 力学行为

Abstract: In order to analyze the mechanical behavior of large-span and small spacing tunnel with biased pressure, the finite difference numerical simulation software FLAC3D was used to analyze the stress-strain evolution law and to select the construction method by comparing in situ monitoring data with numerical simulation results. The results showed that due to the influence of the biased pressure, the settlement and stress values of the left-line tunnel were larger than those of the right-line tunnel. The principal stress of the tunnel crown and arch waist increased greatly after the excavation, which would increase the shear stress of the tunnel lining structure,at the same time, the principal stress and shear stress of the middle surrounding rock increased. So the stress concentration occurred near the arch waist of the two tunnels. Compared with the change of the axial force of the left-line tunnel, the excavation of the right-line tunnel had a greater influence on the bending moment of the left-line tunnel, especially on the bending moment of the arch waist of left-line tunnel near the side of the right-line tunnel. The results provided a scientific basis for the design and construction of the large-span small spacing road tunnel with biased pressure.

Key words: biased pressure, large span and small spacing, road tunnel, numerical simulation, mechanical behavior

中图分类号:

U455

王春国. 偏压大跨小净距公路隧道施工力学行为[J]. 山东大学学报 (工学版), 2020, 50(4): 85-89.

WANG Chunguo. Mechanical behavior of large-span and small spacing road tunnel with biased pressure[J]. Journal of Shandong University(Engineering Science), 2020, 50(4): 85-89.

参考文献

[1] 向海清. 软弱不均匀地层大断面隧道小导洞出洞施工技术[J]. 中外公路,2013,33(4):247-251. XIANG Haiqing. Construction technology of small guide tunnel out of large-section tunnel in weak and uneven stratum [J]. Journal of China & Foreign Highway, 2013, 33(4):247-251.
[2] 张社荣,杜晓喻,陈愿,等. 地层变位分配控制原理在小间距偏压突变大断面隧道中的应用研究[J]. 铁道标准设计,2017,61(6):105-110. ZHANG Durong, DU Xiaoyu, CHEN Yuan, et al. Application and research of ground deflection distribution control theory in tunnels with small spacing, unsymmetrical load and mutant large-section [J]. Railway Standard Design, 2017, 61(6):105-110.
[3] ZHU Yanpeng, SONG Xiaorui. Stress analysis about flat ratio and surrounding rock of large section highway tunnel[J]. Applied Mechanics & Materials, 2013, 368-370(III):1404-1409.
[4] MATSUO Masanori, ISOZAKI Koji, KATOH Tomoaki, et al. A challenge of an ultra-large section tunnel project in unconsolidated ground-design and construction of the Minoh toll road tunnel[C] //Tunnelling & Underground Space Technology Underground Space for Sustainable Urban Development Ita-aites World Tunnel Congress. Singapore: Elsevier, 2004.
[5] 侯瑞彬,申玉生,陈明奎. 基于强度折减法的浅埋偏压小净距隧道围岩稳定性分析[J]. 铁道标准设计,2014,49(4):55-60. HOU Ruibin, SHEN Yusheng, CHEN Mingkui. Analysis on surrounding rock stability of shallowly-buried eccentrically-loaded tunnels with small interval based on strength reduction method[J]. Railway Standard Design, 2014, 49(4):55-60.
[6] 陈佳. 大断面小净距隧道中间岩柱加固方案研究[J]. 公路工程, 2014, 61(4):202-206. CHEN Jia. The research about strengthening project of middle rock pillars in the big section and small clear distance tunnel[J]. Highway Engineering, 2014, 61(4):202-206.
[7] MO You, TENG Bin, ZOU Zuyin, et al. Small spacing tunnels the blasting excavation dynamic effect[J]. Applied Mechanics & Materials, 2013, 353-356:1484-1489.
[8] 陈秋南,赵磊军,谢小鱼,等. 浅埋偏压大跨花岗岩残积土小净距隧道合理间距研究[J]. 中南大学学报(自然科学版),2015, 46(9):3475-3480. CHEN Qiunan, ZHAO Leijun, XIE Xiaoyu, et al. Study on reasonable spacing of small clear distance tunnels in shallow buried and large span granite residual soil[J]. Journal of Central South University(Natural Science), 2015, 46(9):3475-3480.
[9] 朱苦竹,王阳. 降雨对小净距大跨度隧道开挖松动区的影响[J]. 铁道建筑,2017,46(4):64-67. ZHU Kuzhu, WANG Yang. Influence of rainfall on excavation loosened zone of large-span tunnel with small spacing[J]. Railway Engineering, 2017, 46(4):64-67.
[10] 夏才初,龚建伍,唐颖,等. 大断面小净距公路隧道现场监测分析研究[J]. 岩石力学与工程学报,2007,26(1):44-50. XIA Caichu, GONG Jianwu, TANG Ying, et al. Study on site monitoring of large-section highway tunnels with small clear spacing [J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(1):44-50.

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