冰层锚杆拉拔室内试验研究

Indoor Test Study of Ice Anchor Pullout

摘要: 冰层锚固在实际工程中较少，但冰层在寒区冻土工程中属于常见现象。开展了冰层中预制锚杆、现浇锚杆拉拔室内试验，分析了不同制作方式的锚杆拉拔破坏模式、荷载位移特征。结果表明：锚杆制作方式不同，锚固效果明显不同，现浇锚杆要比预制锚杆锚固效果佳，现浇注浆在冰层中形成局部扩体，增大锚杆–冰界面接触面积，锚杆承载力增强。

Abstract: Ice anchors are less common in actual projects, but ice is a common phenomenon in cold zone permafrost projects. Indoor tests on the pullout of prefabricated anchor and cast-in-place anchor in ice were carried out, and the pullout damage patterns and load-displacement characteristics of anchor made in different ways were analyzed. The results showed that the anchoring effect was significantly different with different anchor production methods, and the cast-in-place anchor had a better anchoring effect than the prefabricated anchor, and the cast-in-place grout formed a local expansion in the ice, which increased the contact area of anchor-ice interface and the anchor bearing capacity.