考虑爆破振动影响的混凝土管道安全评价

IF 2.1 Q2 ENGINEERING, CIVIL

International Journal of Protective Structures Pub Date : 2022-09-30 DOI:10.1177/20414196221116650

Huazhang Cao, N. Jiang, Yingkang Yao, Jinshan Sun, Yiwen Huang

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引用次数: 1

摘要

在相邻地铁隧道开挖等爆破工程中，城市混凝土管道容易受到破坏。因此，有必要对埋地混凝土管道在爆破振动作用下的安全性进行评价。在原尺寸埋地混凝土管道现场爆破试验的基础上，考虑管径因素，利用有限元软件ANSYS/LS-DYNA对不同管径混凝土管道的动力响应进行了研究。通过量纲分析，建立了考虑管道直径的颗粒峰值速度预测模型。结合混凝土的抗拉强度，提出了不同直径混凝土管道PPV的安全标准，为实际爆破提供了指导。

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Safety assessment of concrete pipeline considering the effect of pipe diameter subjected to blasting vibration

Urban concrete pipelines are prone to damage in blasting projects such as excavation of adjacent metro tunnels. Therefore, it is necessary to evaluate the safety of buried concrete pipeline subjected to blasting vibration. Based on the field blasting test of full-scale buried concrete pipeline, considering the factor of pipeline diameter, the dynamic response of concrete pipelines with different diameters was studied by using finite element software ANSYS/LS-DYNA. According to dimensional analysis, a prediction model of particle peak velocity (PPV) considering pipeline diameter was established. Combined with the tensile strength of concrete, the safety criterions of PPV for concrete pipeline with different diameters were proposed, which provided guidance for actual blasting.

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来源期刊

International Journal of Protective Structures ENGINEERING, CIVIL-

CiteScore

4.30

自引率

25.00%

发文量