地铁隧道爆破开挖下层状地层爆破振动空间变化规律

IF 1.2 4区工程技术 Q3 ACOUSTICS

Shock and Vibration Pub Date : 2023-11-29 DOI:10.1155/2023/8080987

Zhen Zhang, Chuanbo Zhou, Nan Jiang, Yingkang Yao

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引用次数: 0

摘要

地铁隧道爆破开挖产生的爆破振动会对埋在地层中的相邻构筑物造成危害。为了保证其安全稳定，了解地层爆破振动的空间变化规律至关重要。本文以武汉地铁8号线大断面隧道爆破开挖为研究对象。利用动态有限元程序LS-DYNA进行了三维有限元模拟，并通过现场监测数据验证了其有效性。通过分析沿大断面隧道轴线方向、垂直于大断面隧道轴线方向和沿纵深方向三个方向的爆破振动分布特征，研究了层状地层中爆破振动的空间变化规律。通过量纲分析，建立了考虑高程差影响的爆破振动速度预测模型，实现了对分层地层中不同深度的爆破诱发振动的预测。

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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Spatial Variation Law of Blasting Vibration in Layered Strata under Blasting Excavation of Subway Tunnel

Blasting vibration generated from blasting excavation of subway tunnel may endanger the adjacent structures buried in strata. To guarantee their safety and stability, it is crucial to understand the spatial variation law of blasting vibration in strata. In this paper, the blasting excavation of the large cross-sectional tunnel of Wuhan Metro Line 8 is studied. Three-dimensional finite element simulation is performed using the dynamic finite element program LS-DYNA, and its validity is verified by the field monitoring data. The spatial variation law of blasting vibration in layered strata is investigated through analyzed the distribution characteristic of blasting vibration in three directions, including the direction along the axis of the large cross-sectional tunnel, the direction perpendicular to the axis of the large cross-sectional tunnel, and the direction along the depth. A prediction model for blasting vibration velocity, which considers the impact of elevation differences, is established through dimensional analysis, enabling the prediction of blasting-induced vibrations at various depths in the layered strata.

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来源期刊

Shock and Vibration 物理-工程：机械

CiteScore

3.40

自引率

6.20%

发文量

384

审稿时长

3 months

期刊介绍： Shock and Vibration publishes papers on all aspects of shock and vibration, especially in relation to civil, mechanical and aerospace engineering applications, as well as transport, materials and geoscience. Papers may be theoretical or experimental, and either fundamental or highly applied.