基于钢筋锚杆接地电阻评价锚固质量研究

本文采用接地电阻作为评价钢筋锚杆锚固质量的标准.当锚杆、砂浆、围岩三者接触不密实、不均匀时必然会引起锚杆接地电阻的变化.因此将锚杆接地电阻的理论计算值作为评价锚固状态的参照，利用实际测量值与之作比较，从而对锚杆质量进行分级评价.在利用此方法评价锚杆质量时，准确测量锚杆的接地电阻则尤为重要，采用6极法可以消弱由于大地的各相异性对于接地电阻测量带来的误差，提高测量精度.

Evaluating the quality of steel anchor by grounding resistance

Grounding resistance can be considered as the criterion of anchor quality.When the contact among anchor,grout and soil are not close-grained and asymmetry grounding resistance of anchor will chenge.Therefore,we take the grounding resistance which calculated in theory as criterion,and compare it with measure value in practice.There are difference between them,we can judge of anchor quality according to the difference.When we use grounding resistance evaluate anchor quality,it's very importance that measure accurately grounding resistance,adopting six electrode method can impair the influence of the earth's anisotropy,enhance the precision of measurement.