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预应力锚索(杆)在地表与地下工程建设中已得到广泛应用并且成效显著。任何预应力锚索(杆)加固工程都或多或少地存在群锚效应问题,因此研究预应力群锚加固效应具有重要的现实意义。在查阅大量国内文献的基础上,从现场测试、室内模型试验、数值计算以及理论分析4个方面较全面地概述了预应力锚索(杆)群锚效应的研究成果。群锚效应研究现状可以概括为群锚锚固效应、加固效果和设计方法的研究。许多学者对预应力锚索(杆)群锚效应的研究做出了重要的贡献,但是群锚加固机理研究仍然存有一些不足之处,还没有提升到系统、严密、公认的理论阐述程度,仍需进一步的分析与探讨。
Prestressed cables (rods) have been widely used in surface and underground engineering construction and have achieved remarkable results. Any prestressed anchorage (bar) reinforcement projects are more or less group anchor effect, so research anchorage effect of prestressed anchors has important practical significance. On the basis of consulting a large number of domestic literatures, the research results of the anchorage effect of prestressed anchor cables (rods) are comprehensively summarized from four aspects of field test, indoor model test, numerical calculation and theoretical analysis. The status quo of group anchorage effects can be summarized as anchorage effect, reinforcement effect and design method of group anchorage. Many scholars have made important contributions to the study of the anchorage effect of prestressed anchor rod. However, there are still some shortcomings in the study of the reinforcement mechanism of the anchorage, but they have not yet been promoted to the systematic, rigorous and accepted theoretical explanations, Still need further analysis and discussion.