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OA

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 building floor 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 using finite element software MIDAS/GTS.The interaction process and failure mode of a new type of bottom anchor structure with soil were analyzed by using finite 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.