岩土工程学报Issue(6)：1115-1122,8.DOI:10.11779/CJGE201506018
锚杆锚固体与土体界面特性室内测试新方法
Anchoring solid-soil interface behavior using a novel laboratory testing technique
摘要
Abstract
A testing system composed of pull-out testing apparatus simulating frictional behavior of anchoring solid-soil interface and the corresponding devices and techniques of specimen preparation are developed to study the real response of the anchoring solid-soil interface for anchor system under tension, especially to obtain more accurately the whole journey curve of shearing stress and displacement containing the shearing residual portion. This testing apparatus and techniques are simple and operable, which can be adopted to simulate the laboratory pull-out tests on anchoring system in bulk under multiple circumstances. Four groups of pull-out tests under twenty-seven different circumstances are completed on this testing system, and a novel whole-journey constitutive model for the anchoring solid-soil interface is proposed after investigating deeply the influences of curing period of anchor solid, pull-out speed and other factors on the interface shearing strength. The results indicate that the interface shearing strength increases slowly after curing for fourteen days, that the pull-out speed affects slightly the interface shearing strength in the range of 0.1~2.5 mm/min, and that the proposed constitutive model for the anchoring solid-soil interface is able to give calculated curves with good agreement with the test ones.关键词
锚杆/锚-土界面模型/拉拔试验仪/加载速率Key words
anchor/anchoring solid-soil interface model/pull-out testing apparatus/loading speed分类
建筑与水利引用本文复制引用
陈昌富,梁冠亭,汤宇,徐优林..锚杆锚固体与土体界面特性室内测试新方法[J].岩土工程学报,2015,(6):1115-1122,8.基金项目
国家自然科学基金项目 （）
