锚固类结构临界锚固长度作用效应、工作机理与优化设计方法研究

项目名称： 锚固类结构临界锚固长度作用效应、工作机理与优化设计方法研究

项目编号： No.51278492

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 建筑科学

项目作者： 曾宪明

作者单位： 中国人民解放军总参谋部工程兵科研三所

项目金额： 80万元

中文摘要： 锚固类结构临界锚固长度是指一定岩土介质中锚固类结构杆体的极限锚固长度，超过此长度，其承载力将不再明显增加；未达此长度，其承载力尚有一定潜力可挖。数十年来，特别是近10年来，国内以不同的方法，从不同的侧面对临界锚固长度问题进行了研究，取得了若干成果。但直接研究极为少见，系统研究未见发表。国外没有临界锚固长度的明晰概念。申请者在开展若干探索性研究后认为临界锚固长度现象是普遍存在的，对此问题的透彻研究，将对现行国内外基于平均剪应力概念和方法的设计理论及其理论基础锚杆微观结构理论提出严重质疑和挑战，并将建立基于临界锚固长度的优化设计方法，使传统设计理念发生根本改变。申请人拟通过数值计算、理论分析和试验研究相结合的方法对该问题进行深入研究。前期研究结果表明，该方案具有可行性，研究成果将具有极为重要的科研价值和广泛工程应用前景，它将促进锚固技术的进一步发展和科技进步。

中文关键词： 锚固类结构；临界锚固长度；试验研究；数值计算；优化设计

英文摘要： The critical anchorage length for anchorage structures refers to the ultimate anchorage length of anchor rods in a particular rock and soil medium beyond which the bearing capacity will not increase apparently any longer, while under which the bearing capacity will still have some potentialities to exploit. For the past decades, especially for the last decade, the issue of the critical anchorage length has been investigated in various ways and from different aspects in China, and several research findings have been obtained. However, there are very few direct researches up till now, and no systematic researches have been published. Also, there is not a distinct and clear concept about the critical anchorage length in foreign countries. After several exploratory researches, the applicant hold that the phenomenon of critical anchorage length is ubiquitous; and a thorough investigation into the issue will raise queries and challenges on the existing design theories based on the concept and method of average shearing stress as well as their theoretical basis - the anchor rod microstructure theory. An optimum design method will be established based on the critical anchorage length, and the conventional design concept will be altered radically. The applicant plans to carry out the research by a method combining numeri

英文关键词： Anchorage structure；critical anchorage length；experimental study；numerical calculation；optimization desig