中文摘要：

通过充气锚杆与普通锚杆室内对比模型试验，研究了充气锚杆扩大头对位移特性与极限抗拔承载力的影响，并获得不同埋深下和不同气压下充气锚杆与普通锚杆的荷载-位移曲线。试验结果表明：相同埋深下，充气锚杆比普通锚杆极限承载力大大提高，其相应的位移也随之提高；不同埋深下，充气锚杆扩大头部分所承担的极限抗拔承载力占总极限承载力的比例均大于80%，且随着埋置深度的增加，其所占比例呈减小趋势；在不同气压下，充气锚杆扩大头部分所承担的极限抗拔承载力占总极限承载力的比例为72.6%~84.6%，且随着气压的增大，其所占比例随之增大；回归分析结果表明，充气锚杆在抗拔过程中位移与荷载呈指数函数关系。

英文摘要：

Based on an indoor contrast model test between inflatable anchors and ordinary anchors,a study has been made of the influence of the expanded heads of inflatable anchor on the displacement characteristics and ultimate uplift capacity,thus obtaining the load displacement curves of inflatable anchors and ordinary anchors under different buried depths and different pressures.The experimental results show that under the same depth,the ultimate bearing capacity of the inflatable anchor is much higher than that of the ordinary anchor,and the corresponding displacement is also increased.Under different burial depths,the ratio of ultimate uplift capacity to total ultimate bearing capacity of expanded heads of inflatable anchors is greater than80%,with the buried depths reduced,the proportion showing a decreasing trend.Under different inflation pressures,the ratio of its ultimate uplift capacity to its total ultimate bearing capacity is within the scope of72.6.%~84.6%,its proportion increased with the inflation pressure.The regression analysis results show that the displacement and load of the inflatable anchor rod are exponentially related to the load.