边坡加固工程中压力分散型预应力锚索抗拔实验研究

以河南宛平而速公路(西坪至内乡段)里程桩号K40 280～K40 420处的边坡加固工程为例,对所使用的压力分散型无粘结预应力锚索进行了极限抗拔实验研究,详细介绍实验参数的确定以及整个实验过程.分析实验结果以及实验过程中的若干问题.分析结果显示:锚索端部位移随拉拔力变化曲线呈弹性变形阶段和塑性变形阶段以及最终的塑性变形贯通阶段.本研究充实了压力分散型无粘结预应力锚索的实验教据及设计施工经验,对今后类似地区的工程施工有重要的参考意义和应用价值.

Study on uplift test of pressure-dispersive prestressed anchorage cable in slope reinforcement project

With the background of a reinforcement slope project in the Wan-Ping expressway(Henan,China),this paper studies the uplift test of the non-adhesive pressure-dispersive prestressed cable.The method of the certainty of test parameters and the whole test process are expatiated.The result shows that there are elasticity phase and plastic phase in the P-S curve relating the tensile strength to the end displacement of the cable.Some problems on the test are also analyzed.The results obtained from the study enrich the data and experience of uplift test for this kind of anchorage cable and have important reference value.