Dynamic damage and response characteristics of the tunnel by FEM modeling and field trials

IF 0.7 Q4 ENGINEERING, MECHANICAL

Journal of Vibroengineering Pub Date : 2023-04-09 DOI:10.21595/jve.2023.23073

Xianjun Zheng, Tingyao Wu, Chaoyang Wu, Xiaoqin Wang

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引用次数: 0

Abstract

The dynamic response characteristics of the tunnel and the stability of the surrounding rock are crucial to its safety of the tunnel. Combining the numerical simulation software and field measurement results, the change of peak particle vibration (PPV) and stress were analyzed, based on the longitudinal wave data from the acoustic tests, the blasting damage effects under the action of different blasting counts, including different locations in the deep part of the surrounding rock, were investigated. The results show that: (1) in the vertical direction of the tunnel, the PPV of the tunnel floor and tunnel sidewall is larger, the PPV of the tunnel top is the second, and the tunnel arch shoulder and arch foot is the smallest; (2) under the action of blasting, the stress concentration at the tunnel bottom and arch foot is easier, and the stress monitoring should be strengthened; (3) The depth of damage at different distances was 1.5 m and 3.0 m, respectively, and the depth of damage to the surrounding rock increased from 2.5 m to 4.0 m when the number of blasts was 10 and the number of blasts was 10.

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隧道动态损伤及响应特性的有限元模拟和现场试验

隧道的动力响应特性和围岩的稳定性对隧道的安全至关重要。结合数值模拟软件和现场测量结果，分析了峰值颗粒振动（PPV）和应力的变化，基于声波测试的纵波数据，研究了不同爆破次数（包括围岩深部不同位置）作用下的爆破损伤效应。结果表明：（1）在隧道垂直方向上，隧道底板和隧道侧壁的PPV较大，隧道顶部的PPV次之，隧道拱肩和拱脚最小；（2）在爆破作用下，隧道底部和拱脚的应力集中较为容易，应加强应力监测；（3）不同距离的损伤深度分别为1.5 m和3.0 m，当爆破次数为10次和10次时，围岩损伤深度从2.5 m增加到4.0 m。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Vibroengineering 工程技术-工程：机械

CiteScore

1.70

自引率

0.00%

发文量

审稿时长

4.5 months

期刊介绍： Journal of VIBROENGINEERING (JVE) ISSN 1392-8716 is a prestigious peer reviewed International Journal specializing in theoretical and practical aspects of Vibration Engineering. It is indexed in ESCI and other major databases. Published every 1.5 months (8 times yearly), the journal attracts attention from the International Engineering Community.