Experimental study on the seismic cumulative deformation effect of tunnel lining in landslide area reinforced by double-row piles

被引：0
|
作者：
Wei H. [1 ,2 ]
Wu H. [2 ]
Wu D. [1 ,3 ]
Shi Y. [4 ]
Tang L. [1 ]
Lv X. [1 ]
Chen Q. [5 ]
机构：
[1] College of Resource and Environment Engineering, Guizhou University, Guizhou, Guiyang
[2] China Northwest Research Institute Co. Ltd. of CREC, Gansu, Lanzhou
[3] Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guizhou University, Guizhou, Guiyang
[4] Gansu Provincial Traffic Planning and Survey Design Institute Co., Gansu, Lanzhou
[5] Civil Engineering College, Lanzhou Jiaotong University, Gansu, Lanzhou
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2023年 / 42卷
关键词：
double row of piles; dynamic displacement response; plastic effect coefficient; seismic cumulative deformation effect; tunnelling engineering;
D O I：
10.13722/j.cnki.jrme.2022.0866
中图分类号：
学科分类号：
摘要：
In order to study the seismic cumulative deformation effect(SCDE) of tunnel lining in landslide area reinforced by double-row piles, the shaking table test is conducted for the first time based on an actual engineering case to test the acceleration and dynamic displacement response data of double-row piles and tunnel lining under different probability levels of seismic action. The internal correlation mechanism of the deformation- frequency-energy evolution characteristics of the tunnel lining during the whole process of slope disaster is established. An analysis index of plastic deformation degree of tunnel lining under seismic wave excitation-plastic effect coefficient (PEC) is proposed, and the applicability of PEC to analyze plastic deformation of tunnel lining is verified by Arias strength (Ia) from the perspective of the energy transfer characteristics. Based on the fast Fourier transform (FFT) method, the influence mechanism of the seismic wave frequency components on SCDE and local deformation of the tunnel lining is discussed. The results show that PEC fully takes into account the plastic deformation characteristics of the tunnel lining and has a clear physical meaning, which can more clearly reflect the degree of plastic deformation and SCDE of the tunnel lining than the peak tunnel displacement (PTD). The seismic cumulative deformation evolution process of tunnel lining and the regional response characteristics of the particle spatial position are systematically revealed by the comparative verification analysis of Ia peak strength ratio (M Ia). The results of the frequency domain analysis show that the low-frequency and high-frequency components of the seismic waves play a controlling role in the overall and local deformation of the tunnel lining, respectively. The dynamic deformation response of tunnel lining in the landslide area reinforced by double-row piles is a progressive cumulative evolution process. Obtaining a better understanding of the SCDE of the tunnel lining can provide a scientific basis for the identification of the seismic damage status and appropriate seismic reinforcement. © 2023 Academia Sinica. All rights reserved.
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页码：3966 / 3979
页数：13
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