Dynamic Response of Shallow-Buried Tunnels Traversing High Loess Slopes

• 作者: CAO Xiaoping LIANG Qingguo SUN Wen WANG Lili
• 来源期刊: 中国地震研究（英文版）
• 年，卷（期）: 2020,（4）
• 所属期刊栏目: Landslide Mechanism
• 页码范围: 496-509
• 页数: 14页
• 语种: 英文
• DOI: 10.19743/j.cnki.0891-4176.202004006

摘要

Considering the existence of numerous shallow-buried tunnels traversing high slopes in the loess area in western China and the fact of high seismic intensity there, we investigate the dynamic response rules of a shallow-buried loess tunnel and its slope under the action of seismic waves with different intensities. Through large-scale shaking table model tests, we successfully analyze the characteristics and process of the destabilization of tunnels and slopes, and propose valuable suggestions regarding the reinforcement parts of a tunnel for reducing seismic damage. The results show that the main seismic damage on a slope include the failure of the sliding surface between the top and foot and the stripping of the soil around the tunnel entrance, while the damage on a tunnel is mainly manifested as the seismic-induced subsidence at the portal section and the cracking deformation at the joint areas. Finally,we propose that the"staggered peak distribution"phenomenon of the maximum acceleration values at the vault and inverted arch area can be considered as a criterion indicating that the tunnel enters into the threshold of dynamic failure.

作者信息

序号	姓名	单位	发文数	被引次数	H指数	G指数
1	SUN Wen		1	0	0.0	0.0
2	LIANG Qingguo		1	0	0.0	0.0
3	WANG Lili		1	0	0.0	0.0
4	CAO Xiaoping		1	0	0.0	0.0