中南大学学报（自然科学版）2011，Vol.42Issue(5)：1369-1374,6.
充气锚杆在砂土中变形与承载特性试验研究
Experimental study on deformation and bearing features of inflatable anchors in sands
摘要
Abstract
In order to analyze the deformation characteristics of inflatable anchor and its influence on the bearing capacity,the deformation of membrane was measured during inflating according to the relationship between pressure and volume based on the laboratory model test.The typical load-displacement curves of inflatable anchor were obtained through the pullout test, and its anchoring mechanism and bearing features were discussed.The results show that the shape of the inflatable membrane is approximately cylindrical and the relationship among inflated pressure and volume and ultimate inflatable pressure can be calculated in advance using the cavity expansion theory.A large tip resistance is obtained from the expander body of inflatable anchor.As the lateral pressure of the soil changes into the first principal stress and the compact effect on the soil during the inflating of inflatable anchor, the shaft resistance of the inflatable anchor is greatly improved.The inflatable anchors have a higher bearing capacity than common anchors.关键词
充气锚杆/变形特性/圆孔扩张/承载特性/抗拔试验分类
建筑与水利引用本文复制引用
曹佳文,彭文祥,彭振斌,何忠明,尹泉..充气锚杆在砂土中变形与承载特性试验研究[J].中南大学学报（自然科学版）,2011,42(5):1369-1374,6.基金项目
国家自然科学基金资助项目(50878212) （50878212）
