[1]关振长,徐遒,邓涛.浅埋偏压条件下特大断面隧道地震动态响应的试验研究[J].自然灾害学报,2018,(03):068-76.[doi:10.13577/j.jnd.2018.0308]
 GUAN Zhenchang,XU Qiu,DENG Tao.Seismic responses of large section tunnelwith shallow cover and unsymmetrical loading[J].,2018,(03):068-76.[doi:10.13577/j.jnd.2018.0308]
点击复制

浅埋偏压条件下特大断面隧道地震动态响应的试验研究
分享到:

《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
期数:
2018年03期
页码:
068-76
栏目:
出版日期:
2018-06-28

文章信息/Info

Title:
Seismic responses of large section tunnelwith shallow cover and unsymmetrical loading
作者:
关振长 徐遒 邓涛
福州大学 土木工程学院, 福建 福州 350108
Author(s):
GUAN Zhenchang XU Qiu DENG Tao
College of Civil Engineering, Fuzhou University, Fuzhou 350108, China
关键词:
特大断面隧道浅埋偏压地震动态响应振动台试验PHA放大系数PEP震荡系数
Keywords:
large section tunnelshallow cover with unsymmetrical loadingseismic responseshaking table model testPHA amplification coefficientPEP oscillation coefficient
分类号:
TU4;X9
DOI:
10.13577/j.jnd.2018.0308
摘要:
以福州市二环路金鸡山隧道为工程原型,设计制作了浅埋偏压条件下特大断面隧道的1/30缩尺模型,完成了20种工况下的模拟地震动试验,重点关注隧道模型加速度、衬砌接触压力、衬砌表面应力的地震动态响应。隧道中轴面各测点PHA放大系数随高程呈近似对数型增大,改变了原场地高程效应的表现形式;隧道模型的第一卓越频率与EL波的卓越频率较为接近,其共振效应使得EL波激励引起的高程效应明显大于其他地震波。靠山侧衬砌结构所承担的地震动附加压力显著大于临空侧,且在大振幅激励下,其拱腰所承担的地震动附加压力反而大于拱脚。隧道衬砌结构的扁平率和几何曲率,对其动应力峰值的分布均有显著影响,尤其是在大振幅激励下,靠山侧拱脚处的动应力峰值显著大于其他部位。衬砌结构的裂缝发展形态特征,与接触压力峰值及动应力峰值沿衬砌环向分布的规律是相一致的。上述成果为浅埋偏压条件下特大断面隧道抗震设防提供了参考。
Abstract:
Taking the Jinjishan Tunnel in Fuzhou 2nd ring road as prototype, the 1/30 downscale model for the large section tunnel with shallow cover and unsymmetrical loading is fabricated. Then the shaking table tests with 16 loading cases are carried out, and the seismic responses of model acceleration, lining contact pressure and lining stress are focused. The PHA amplification coefficient along the tunnel axial plane increase logarithmically, which implies that the existing of large section tunnel changes the elevation effect of original ground significantly. The first dominant frequency of tunnel model approximates to the dominant frequency of EL wave, so that the elevation effect caused by EL wave is greater than other three waves obviously. The earthquake-induced contact force upon the lining backward the slope is greater than the lining toward the slope obviously, moreover, the contact force carried by tunnel arch exceeds its sidewall under the excitation of large ground motion. The distribution of peak dynamic stress along the lining is significantly influenced by the flat ratio and the curvature of tunnel lining. The peak dynamic stress in the sidewall backward the slope exceeds than other counterparts under the excitation of large ground motion. The development of lining crack coincides with the distribution of contact force and dynamic stress along the tunnel lining, which provides some reference to the aseismic design of large section with shallow cover and unsymmetrical loading.

参考文献/References:

[1] 李天斌. 汶川特大地震中山岭隧道变形破坏特征及影响因素分析[J]. 工程地质学报, 2008, 16(6):742-750. LI Tianbin. Failure characteristics and influence factor analys of mountain tunnels at epicenter zones of great Wenchuan earthquare[J]. Journal of Engineering Geology, 2008, 16(6):742-750. (in Chinese)
[2] 崔光耀, 王明年, 于丽, 等. 汶川地震公路隧道洞口结构震害分析及震害机理研究[J]. 岩土工程学报, 2013, 35(6):1084-1091. CUI Guangyao, WANG Mingnian, YU Li, et al. Seismic damage and mechanism of portal structure of highway tunnels in Wenchuan Earthquake[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(6):1084-1091. (in Chinese)
[3] Yang B, Zheng Y G, Lai J, et al. Shaking table model test and numerical modeling for tunnels traversing fault[J]. The Open Civil Engineering Journal, 2015, 9(1):789-798.
[4] Wang Z Z, Jiang Y J, Zhu C A, et al. Shaking table tests of tunnel linings in progressive states of damage[J]. Tunnelling and Underground Space Technology, 2015(50):109-117.
[5] Jiang L, Chen J, Li J. Seismic response of underground utility tunnels:shaking table testing and FEM analysis[J]. Earthquake Engineering and Engineering Vibration, 2010, 9(4):555-567.
[6] CHEN J, SHI X, LI J. Shaking table test of utility tunnel under non-uniform earthquake wave excitation[J]. Soil Dynamics and Earthquake Engineering, 2010, 30(11):1400-1416.
[7] 李林, 何川, 耿萍, 等. 浅埋偏压洞口段隧道地震响应振动台模型试验研究[J]. 岩石力学与工程学报, 2011, 30(12):2540-2548. LI Lin, HE Chuan, GENG Ping, et al. Experimental study on the seismic response study of shaking table model test for seismic response of portal section of shallow unsymmetrical loading tunnnel[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(12):2540-2548. (in Chinese)
[8] 江学良, 陈江, 杨慧, 等. 基于大型振动台试验的偏压隧道地震响应特性研究[J]. 自然灾害学报, 2016, 25(5):158-166. JIANG Xueliang, CHEN Jiang, YANG Hui, et al. Study on seismic response characteristics of unsymmetrically loaded tunnel based on large-scale shaking table test[J]. Journal of Natural Disasters, 2016, 25(5):158-166. (in Chinese)
[9] 方林, 蒋树屏, 林志, 等. 穿越断层隧道振动台模型试验研究[J]. 岩土力学, 2011, 32(9):2709-2713. FANG Lin, JIANG Shuping, LIN Zhi, et al. Shaking table model test study of tunnel through fault[J]. Rock and Soil Mechanics, 2011, 32(9):2709-2713. (in Chinese)
[10] 耿萍, 吴川, 唐金良, 等. 穿越断层破碎带隧道动力响应特性分析[J]. 岩石力学与工程学报, 2012, 31(7):1406-1413. GENG Ping, WU Chuan, TANG Jinliang, et al. Analysis of dynamic response properties for tunnel through fauilt fracture zone[J]. Chinese Journal of Rock Mechanics and Engineering, 2012, 31(7):1406-1413. (in Chinese)
[11] 吴冬, 高波, 申玉生, 等. 隧道仰坡地震动力响应特性振动台模型试验研究[J]. 岩土力学, 2014, 35(7):1921-1928. WU Dong, GAO Bo, SHEN Yusheng, et al. Shaking table test study of seismic dynamic response of tunnel entrance slope[J]. Rock and Soil Mechanics, 2014, 35(7):1921-1928. (in Chinese)
[12] 王帅帅, 高波, 隋传毅, 等. 不同地质条件下隧道洞口仰坡地震破坏特性研究[J]. 岩土力学, 2014, 35(S1):278-284. WANG Shuaishuai, GAO Bo, SUI Chuanyi, et al. Shaking table test for seismic behavior of upward slope at tunnel entrance in different geological conditions[J]. Rock and Soil Mechanics, 2014, 35(S1):278-284. (in Chinese)
[13] 关振长, 龚振峰, 罗志彬, 等. 特大断面隧道地震动力特性的振动台试验研究[J]. 岩土力学, 2016, 37(9):2553-2560. GUAN Zhenchang, GONG Zhenfeng, LUO Zhibin, et al. Seismic property of a large section tunnel based on shaking table model tests[J]. Rock and Soil Mechanics, 2016, 37(9):2553-2560. (in Chinese)
[14] 关振长, 罗志彬, 徐遒, 等. 基于振动台模型试验的特大断面隧道地震动态响应研究[J]. 工程地质学报, 2017, 25(3):648-656. GUAN Zhenchang, LUO Zhibin, XU Qiu, et al. Seismic response of large section tunnel based on shaking table model test[J]. Journal of Engineering Geology, 2017, 25(3):648-656. (in Chinese)
[15] 关振长, 龚振峰, 陈仁春, 等. 一种用于振动台试验的拼装式可变刚度模型箱[P]. 中国专利:2015106565382, 2015. GUAN Zhenchang, GONG Zhenfeng, CHEN Renchun, et al. A modular variable stiffness model box for shaking table test[P]. Chinese patent:2015106565382, 2015. (in Chinese)

备注/Memo

备注/Memo:
收稿日期:2018-03-10;改回日期:2018-04-04。
基金项目:国家自然科学基金项目(51678155)
作者简介:关振长(1980-),男,教授,博士,主要从事岩土与隧道工程方面的研究.E-mail:gaussto@hotmail.com
更新日期/Last Update: 1900-01-01