[1]丁祖德,廖明荣,肖南润,等.穿越活动断层隧道抗减震措施及适应性研究[J].自然灾害学报,2022,31(05):129-139.[doi:10.13577/j.jnd.2022.0515]
 DING Zude,LIAO Mingrong,XIAO Nanrun,et al.Research on aseismic measures and adaptability of tunnels crossing an active faults[J].,2022,31(05):129-139.[doi:10.13577/j.jnd.2022.0515]
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穿越活动断层隧道抗减震措施及适应性研究
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
31
期数:
2022年05期
页码:
129-139
栏目:
出版日期:
2022-10-28

文章信息/Info

Title:
Research on aseismic measures and adaptability of tunnels crossing an active faults
作者:
丁祖德1 廖明荣1 肖南润1 任志华2 刘正初3
1. 昆明理工大学 建筑工程学院, 云南 昆明 650500;
2. 云南公路科学技术研究院, 云南 昆明 650051;
3. 中铁二院昆明勘察设计研究院, 云南 昆明 650200
Author(s):
DING Zude1 LIAO Mingrong1 XIAO Nanrun1 REN Zhihua2 LIU Zhengchu3
1. Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, China;
2. Yunnan Research Institute of Highway Science and Technology, Kunming 650051, China;
3. Kunming Survey and Design Research Institute of the Second China Railway Institute, Kunming 650200, China
关键词:
隧道工程活动断层抗减震措施地震动强度地震动方向适应性
Keywords:
tunnel engineeringactive faultaseismic measuresearthquake ground motion intensityground motion directionadaptability
分类号:
U451;X43
DOI:
10.13577/j.jnd.2022.0515
摘要:
依托格巧高速某穿越活动断层公路隧道,建立了考虑隧道-围岩-断层相互作用的三维地震响应计算模型,研究了设置减震层、减震缝、柔性接头等单一措施和组合措施下的隧道结构地震响应规律,探讨抗减震措施的减震效果及适用性。结果表明:横向地震作用下,3种单一减震措施均能有效降低衬砌结构的地震损伤,但不同措施的减震效果有所差异。采取减震层时,减小了整个结构地震响应,降低了结构在断层区域的应力集中程度。采取减震缝、柔性接头时,明显减小了损伤分布范围,起到了隔断衬砌损伤蔓延的作用,但局部损伤值降低不明显。组合措施下,结构的拉、压损伤分布特征与单一措施下的相似,但进一步限制了地震动及断层错动对隧道结构损伤的影响范围。地震动强度和地震波入射方向对结构地震损伤有重要影响。随着地震动强度的增大,衬砌损伤范围迅速增大,损伤严重程度急剧增加。地震波入射方向对结构地震损伤的影响由小到大依次为:竖向、横向、斜向和纵向地震动。组合减震措施对竖向地震动的适用性好,而对纵向地震动的适用性差,采取的抗减震措施需要考虑地震动入射方向。所得结论可为高烈度区穿越活动断层隧道抗减震提供参考。
Abstract:
Relying on a highway tunnel crossing an active fault on the Geqiao Expressway,a three-dimensional seismic response calculation model considering the interaction of the tunnel-surrounding rock-fault was established,and the single structures and composite measures such as the setting of damping layer,aseismic joints,and segmental joints were studied. The seismic response law of tunnel structure is to discuss the damping effect and applicability of aseismic measures. The results show that all three single damping structures can effectively reduce the seismic damage of the lining structure under the action of lateral earthquakes,but the damping effects of different measures are different. When the damping layer is adopted,the seismic response of the entire structure is reduced, and the stress concentration of the structure in the fault area is reduced. When the aseismic joints and segmental joints are adopted,the damage distribution range is obviously reduced,and the damage spread of the partition lining is played,but the local damage value is not significantly reduced. Under the composite structures,the tensile and compressive damage distribution characteristics of the structure are similar to those under the single structure,but the influence range of seismic and fault dislocation on the tunnel structure damage is further limited. The earthquake ground motion intensity and the incidence direction of seismic waves have an important influence on the seismic damage of structures. As the earthquake ground motion intensity increases,the damage range of the lining increases rapidly,and the severity of the damage increases sharply. The impact of the incident direction of the seismic wave on the seismic damage of the structure in descending order is vertical,lateral,oblique and longitudinal seismic. The composite damping measures have good applicability to vertical earthquake ground motion, but poor applicability to longitudinal earthquake ground motion. The aseismic measures taken need to consider the incident direction of ground motion. The conclusions obtained can provide a reference for aseismic mitigation of tunnels crossing active faults in high intensity areas.

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备注/Memo

备注/Memo:
收稿日期:2021-7-12;改回日期:2021-9-23。
基金项目:国家自然科学基金项目(52168057, 51768028);云南省交通厅科技项目(2017A-04)
作者简介:丁祖德(1979-),男,教授,博士,主要从事隧道与地下工程方面的研究.E-mail:dzdvsdt@163.com
更新日期/Last Update: 1900-01-01