施工技术 2015年4月上 44 CONSTRUCTION TECHNOLOGY 第44卷第7期 D01:10.7672/sjs2015070044 拉力集中型预应力土层锚杆侧摩阻力分布形态 的影响因素研究 张钦喜，邓超，梁德周2，许超3 (1.北京工业大学建筑工程学院，北京100124；2.北京建材地质工程公司，北京100102； 3.中兵勘察设计研究院，北京100053) [摘要]预应力锚杆已被广泛应用于基坑、隧道等地下工程，拉力集中型预应力错杆也以其独特优势而备受青睐. 但是，对于其错固机理、承载机制的认识相对滞后.采用FLAC3有限元软件，通过分析土层和施工参数，对错杆承 载力、预应力损失等问题进行研究.结果表明：错杆自由段长度增加，错固段的平均摩阻力得到显著提高，而铺杆 的承载力随着错固段长度的增加而提高，错杆错固段平均摩阻力却一直在减小，说明错固段的利用率下降. [关键词]地下工程；错杆；侧摩阻力；有限元分析 [中图分类号]TU753 [文献标识码]A [文章编号]1002-8498(2015)07-0044-05 Research on Influence Factors of the Distribution Form of Concentration of Prestressed Soil Anchor Side Friction Zhang Qinxi Deng Chao' Liang Dezhou Xu Chao (1.College of Architecture and Civil Engineering Beijing University of Technology Beijing 100124 China; 2.Beijing Building Material Geological Engineering Corporation Beijing 100102 China; 3.Ordnance Industry Institute of Geotechnical Surrey Design Beijing 100053 China) Abstract:Prestressed anchor has been widely used in underground engineering such as foundation excavation tunnel and so on.Concentrated tension prestressed anchor with its unique advantages favored.However for the lagging understanding of the anchoring mechanism and the bearing mechanism it needs to be improved.In this paper through analysis of the soil and construction parameters to research on the problems such as the bearing capacity of anchor prestress loss.And the results show that with the increase of bolt free length the anchoring section of average frictional resistance improved signifi...
拉力集中型预应力土层锚杆侧摩阻力分布形态的影响因素研究.pdf
