关键词: 成孔工艺, 锚固力损失, 分析, 控制

Abstract:

The mechanism of the anchoring effect of the anchorage cable is very complicated because there are many factors including the materials, the anchor clamping, the quality of anchorage cable and the construction techniques. The effects and control method of the construction techniques on the prestressing loss were studied. Based on the analysis of anchor eye bending and its deviation, a theoretical formula of prestressing loss of friction was deduced, which accords with the  practice of engineering and has more practical meaning. The results showed that the pore theory formula for calculating friction loss works more in line with engineering practice. The hole slope of the drilling anchor holes had relativity with the loss of power, that was, when the hole slope became larger, the power loss of the anchoring cable gets larger. With the same slope  n, anchor pullloading (P) became greater as the loss of anchoring force became larger.The anchor force loss caused by channel pore forming could be reduced by the adoption of appropriate measures.

Key words: construction technics of anchor eye, prestressing loss,  , analysis, control