岩土力学2013，Vol.34Issue(6)：1696-1702,7.
充气锚杆极限承载力计算方法
Calculation method for ultimate bearing capacity of inflatable anchor
摘要
Abstract
In order to explore the calculation method of the inflatable anchor bearing capacity,according to the model test,the stress characteristics and failure forms of the inflatable anchor during pullout are analyzed as well as the variational characteristic of the load displacement curve of anchor.Based on the theory of cavity expansion,the formula for the inflatable anchor side resistance and end resistance calculation are derived through a simplified mechanical model.The calculation values by the theoretical formula are compared with the experimental results.The results of the study show that:(1) the elastoplastic deformation mechanism of the expansion body end to soil can be well described by the spherical cavity expansion theory,as well as the estimation of end resistance value.Due to the inflated pressure on the soil extrusion expansion effect,the anchor side resistance is greatly increased.(2) The results from the ultimate bearing capacity theory formula are coincident with those from the pullout test,so as to validate the ultimate bearing capacity theory formula.(3) With a case of comparison to screw anchor,inflatable anchor shows the 4.3 times of the bearing capacity over single anchor sheet screw anchor and about 1.9 times over double anchor plate screw anchor,so as to show the obvious advantages of the inflatable anchor bearing capacity.关键词
充气锚杆/极限承载力/侧阻力/端阻力/计算方法Key words
inflatable anchor / ultimate bearing capacity / end resistance / side resistance / calculation method分类
建筑与水利引用本文复制引用
彭文祥,张旭,曹佳文..充气锚杆极限承载力计算方法[J].岩土力学,2013,34(6):1696-1702,7.基金项目
国家自然科学基金资助项目(No.50878212). （No.50878212）
