The problem existed in many supervision and test for the thickness of protection layer for steel bar in engineering structure body are approached and some suggestion are proposed in this paper.

本文结合对大量工程结构实体钢筋保护层厚度的监督检测，对开展这项工作中存在的一些问题进行探讨，并提出了一些建议。

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Research of a rock body structure is very important to studying engineering geological properties and characteristics of the rock body structure mechanics.

岩体结构研究是工程地质特征和岩体结构力学性质研究的重要方面。

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This paper reveals this law by engineering practice. Thence, it deepens the correlative understanding of the wave motion character of the reflected wave with the structure of pile body.

文章通过工程实践揭示了这一规律，从而深化了反射波波动特征与桩身结构特征的相关性认识。

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