全长可回收树脂锚杆锚固段力学特征光测法研究

Research on optical method of menchanical property of anchorage segment of full-length retrievabl resin bolt

杆体全长可回收锚杆锚固段的力学特征有别于普通可回收树脂锚杆,借助光弹性试验对锚杆锚固段附近围岩中最大剪应力进行了研究,得到了锚固段上剪应力的分布规律:可回收锚杆锚固段附近围岩中,最大剪应力在钻孔底部取得最大值,沿孔底至孔口方向衰减。

Mechanical characters of full- length recoverable resin bolts bonding segment are different to common recoverable end--resin bolts, and it is necessary to study them. the author uses flexible glue undergo photoelastic test. In this test, the author plays stress on observing lines of equal shear and discover the distributing characteristic of maximum shear stress nearby bonding segment： the sheer stress of the bolt＇s anchored part gets maximum value at the bottom of the hole, and decreases in the axial direction.