黄土层预应力锚索锚固力试验研究

Test research on anchorage force of prestressing anchorage cable in loessland

为了更好的指导预应力锚索在黄土层中的应用,以现场试验和数学推导为研究手段,采用电阻应变片测量锚索在拉力作用下的变形,得出了黄土层中锚索锚固段在不同拉力水平下的应变曲线。分别采用Philips公式和粘结应力均匀分布法公式对试验数据进行分析,推导了两种计算锚固力的公式,指出采用Philips理论更能真实地反映黄土地层中的锚固力特征。

In order to direct the application of the prestressing anchorage cable in loessland, in-situ test and mathematical analysis are took as research means and the anchorage cable＇s deformation are measured on tensile test through the resistance foil gauge. The strain curve is derived in diffirent state of tension in loessland. Using the formula of Philips and uniform binding stress to analyze the test data, two formula of calculating anchorage force have been deduced. It is pointed out that the theory of Philips can show more veritably the character of anchorage force in loessland.