柔性防护系统中钢丝绳锚杆性能试验研究

 在柔性防护系统中，钢丝绳锚杆受到的荷载作用方向与锚杆轴向存在一定的角度，而目前在钢丝绳锚杆的设计中，仅仅以轴向抗拔力作为设计依据，这并不能反映钢丝绳锚杆的实际工作状态。为此设计钢丝绳锚杆随不同方位荷载作用的试验，考察钢丝绳锚杆的孔径和荷载作用方位对其性能的影响，结果表明：在斜向荷载作用下，增大锚杆孔径或增大斜向荷载与锚杆水平方向夹角，能有效提高锚杆的性能，降低其在荷载作用下的位移。此外，当钢丝绳锚杆的锚固力由其自身能够承受的极限荷载确定时，需要局部加强鸡心环弯折部分的抗折能力，提高锚杆的整体受力性能。最后，提出柔性防护系统中钢丝绳锚杆的设计依据，供工程应用时参考。

EXPERIMENTAL STUDY OF CABLE ANCHORS FOR FLEXIBLE PROTECTION SYSTEMS

In the flexible protection systems，the load applied on the cable anchor had a contain angle with the axial direction，but the axial pullout capacity was the only design principles currently which was not reflected the actual working conditions. The mechanical performance of the cable anchor with different bolt hole diameters and testing load directions were investigated. The results show that the anchor performance was improved and the displacement was decreased by increasing the bolt hole diameter or increasing the included angle between the anchor horizontal direction and the oblique load direction. In addition，the pullout capacity was enhanced with the heart-shaped ring consolidation when the pullout capacity of the cable anchor determined by the limited force. Finally，the way to design the cable anchor in the flexible protection systems was also presented.