早龄期混凝土中锚杆锚固强度试验研究  

Experimental study on anchoring strength of anchor-bolt in early-age concrete

作　　者：雷进生[1] 陈建飞[1] 王乾峰[1] 刘琼[1] 曹雪廷[1] 

机构地区：[1]三峡大学土木与建筑学院,湖北宜昌443002

出　　处：《水利水电技术》2013年第9期141-144,共4页Water Resources and Hydropower Engineering

摘　　要：通过对混凝土中锚杆进行拉拔试验,研究并分析锚杆锚固直径、锚固长度及混凝土龄期与锚固强度的关系。实验结果表明:锚固力随混凝土龄期的增长呈非线性增长趋势,但增长速度逐渐减慢,并趋于稳定;锚杆的锚固力随锚杆直径、锚固长度增加而增大。但在混凝土早龄期锚杆直径对锚固力影响并不明显,应重点考虑混凝土强度增长确定合理的锚固长度。试验结果和理论分析为改善衬砌结构的受力状态、优化拆模时间提供了参考依据。Through the pull-out test on the anchor-boh in concrete, the relationship among the diameter and length of anchor- bolt, the age of concrete and the anchoring strength is studied and analyzed. The test result shows that the anchoring force pres- ents a trend of non-linear increase along with the increase of the concrete age, and then the increase rate slows down gradually and trends to be stable, while the anchoring force of anchor-boh increases along with the increases of both the diameter of anchor- bolt and its anchoring length. However, there is no obvious effect from the diameter of anchor-boh during the early-age of con- crete upon the anchoring force, and then the increase of the concrete strength must be considered for determining the reasonable anchoring length. The test result and theoretical analysis provide a reference basis for improving the stress state of lining structure and optimizing the form removal time.

关 键 词：混凝土龄期 锚杆 拉拔试验 锚固力 

分 类 号：TV43[水利工程—水工结构工程]