扩大头笼芯囊锚杆在输变电工程边坡支护中的研究及应用  

Research and Application of End-Expanded Core-Bagged Anchor in Slope Support of Power Transmission and Transformation Project

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作  者:罗惟贤 周鲲 谭彬 林新 吴戈 LUO Weixian;ZHOU Kun;TAN Bin;LIN Xin;WU Ge(Research Institute of Economics andTechnology of State Grid Hunan Electric Power Co.,Ltd.,Changsha 410004,China;Hunan Economic Research Power Design Institute,Changsha 410004,China)

机构地区:[1]国网湖南省电力有限公司经济技术研究院,湖南长沙410004 [2]湖南经研电力设计有限公司,湖南长沙410004

出  处:《电力勘测设计》2024年第7期5-11,共7页Electric Power Survey & Design

基  金:国网湖南省电力有限公司科技项目(5216A222000Q)。

摘  要:扩大头锚杆以其锚固段和扩大头的端头效应提供足够的抗拔锚固力,具有抗拔承载力大、适应性强、工程经济性优等特点。近年来,该技术发展迅速,被广泛运用于建筑底板抗浮、深基坑支护、边坡治理等工程中。本文利用有限元软件MIDAS/GTS分析一种扩大头笼芯囊新型底锚结构与土体相互作用过程及其破坏形式,验证了规范极限抗拔承载力计算公式的合理性,并对影响极限抗拔承载力的因素进行了讨论。针对某220kV输变电工程土质边坡实例,采用扩大头笼芯囊新型底锚结构支护与普通锚杆支护的设计对比分析,验证了该技术在输变电工程中运用的可行性与良好的经济技术效果。The extending head anchor provides sufficient anchorage force due to its anchorage section and the end effect of the extended-head bolt,which has the characteristics of large pull-out bearing capacity,strong adaptability and good engineering economy.In recent years,the technology has developed rapidly,and has been widely used in buildingfloor anti-floating,deep foundation pit support,slope treatment and other projects.The interaction process and failure mode of a new type of end-expanded core-bagged anchor bottom structure with soil were analyzed by usingfinite element software MIDAS/GTS.The interaction process and failure mode of a new type of bottom anchor structure with soil were analyzed by usingfinite element software MIDAS/GTS.The rationality of the standard formula for calculating the ultimate pulling capacity was verified,and the factors affecting the ultimate pulling capacity were discussed.According to the example of soil slope of a 220 kV power transmission and transformation project,The feasibility and good economic and technical effect of this technology in power transmission and transformation project are verified by the design comparison and analysis of the new type of end-expanded core-bagged anchor bottom structure support and the ordinary anchor support.

关 键 词:输变电工程 扩大头锚杆 有限元 极限抗拔承载力 边坡支护 

分 类 号:TM75[电气工程—电力系统及自动化]

 

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