Analysis of a flash-flood induced debris flow at a highway tunnel portal in a seismic region

被引：0

作者：

Highway Planning, Survey, Design and Research Institute, Sichuan Provincial Transport Department, Chengdu , China ^{[1
]}

机构：

[1] Highway Planning, Survey, Design and Research Institute, Sichuan Provincial Transport Department, Chengdu

来源：

Mod. Tunn. Technol. | / 4卷 / 8-12期

关键词：

Debris flow; Regions with high seismic intensity; Treatment measures; Tunnel portals;

D O I：

10.13807/j.cnki.mtt.2014.04.002

中图分类号：

学科分类号：

摘要：

Resisting secondary disasters like a debris flow is critical during the design and construction of tunnels in regions with high seismic intensity. Based on the field survey and system analysis of the flash-flood induced portal damage to the Yingxiu-Wenchuan highway tunnel on July 9th, 2013, this paper concludes mountain loosening by the Wenchuan earthquake, stiffness and thickness insufficiencies of the backfilling material, and poor anti-erosion of the foundation in the cut-and-cover section of the tunnel are the main reasons for portal damage. It also puts forward relevant design ideas which can prevent and reduce disasters and minimize state asset losses, such as strengthening the evaluation for post-seismic potential hazards, designing beyond expectation, emphasizing quality and effectiveness of backfilling, and providing bridge-type channels for potential debris flows.

引用

页码：8 / 12

页数：4

共 7 条

[1]

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[2]

Risk Assessment of Geological Hazards of National Highway G213 after the Flash Flood Occurred on 9th July 2013, (2013)

[3]

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[4]

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[5]

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[6]

Cui G., Wang M., Lin G., Et al., Study of the Earthquake Damage Mechanism and Aseismatic Countermeasure of a Highway Tunnel Portal Section in the Wenchuan Seismic Disaster Area, Modern Tunnelling Technology, 48, 6, pp. 6-10, (2011)

[7]

Li Y., Li T., Seismic Analysis and Safety Evaluation of the Tunnel Portal Section in Regions of High Seismic Intensity, Modern Tunnelling Technology, 48, 3, pp. 46-52, (2011)

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