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从锚杆应变的大量实测结果中发现:“锚杆受拉”这一传统概念,并不完全是正确的。实测及分析证明,锚杆基本上是受拉的,但在有些条件下,约有半数以上的锚杆在不同时期承受大小不等的轴向偏心压应变。本文概略介绍实测锚杆应变的方法和目的,着重分析锚杆轴向合成应变的计算方法及出现拉或压应变的条件问题,指出实测锚杆应变对生产及设计工作的意义。
From a large number of measured results of the bolt strain found: the traditional concept of “bolt tension” is not entirely correct. Measured and analyzed proved that the anchor rod is basically tensioned, but under some conditions, about half of the anchor rods are subjected to axial eccentric compressive strain with different sizes at different times. This paper gives a brief introduction of the method and purpose of measuring the bolt strain, emphasizes the analysis of the calculation method of the axial composite strain of the bolt and the condition of the emergence of the tensile or compressive strain, and points out the significance of measuring the bolt strain on the production and design work.