Longitudinal wave tomography technology of curved interface
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摘要: 大跨径铁路预应力混凝土连续梁桥0号块部位通常都设置有密集钢筋网、预应力管道、支座锚栓、防落梁挡块锚栓等构件，在进行0号块混凝土浇筑时，粗骨料不易透过钢筋网，造成0号块混凝土内部产生不密实等缺陷。弹性波层析成像技术能有效实现对0号块内部密实情况的检测，其检测效率及检测精度能满足工程要求，但传统弹性波层析成像技术只能应用于规则的矩形界面，无法对弯曲界面进行有效检测。在传统弹性波层析成像技术的基础上，根据工程实际提出弯曲界面层析成像技术，并通过实地检测对该技术进行了验证。Abstract: The zero block of a long-span railway prestressed concrete continuous beam bridge is usually equipped with dense steel mesh, prestressed pipes, support anchors, anti-falling beam stop anchors and other components. During the concrete pouring of zero block, the coarse aggregate is not easy to pass through the reinforcement mesh, resulting in non compactness and other defects in the concrete of zero block. Elastic wave tomography technology can effectively detect the internal noncompactness of block zero, and its detection efficiency and accuracy can meet the engineering requirements. However, the traditional elastic wave tomography technology can only be applied to the regular rectangular interface, and can not effectively detect the curved interface. Based on the traditional elastic wave tomography technology, this paper proposes the curved interface tomography technology according to the actual engineering, and verifies the technology through field testing.
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Keywords:
- zero block /
- elastic wave /
- tomography /
- curved interface
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