Study On Self-safeguard Technology And Design Method Of Prestrese Anchor-hold Structure

Because of complicated,changefully,uncertain characteristic in geotechnical engineering, the internal force in anchor-hold retaining structure is asymmetric and uncertain,which result in destroy.The article studys chiefly self-safeguard and self-change technology in anchor-hold retaining structure in order to advance the system's safe and economical characteristic. After analyzing to anchor-hold technology in geotechnical engineering, the article analyses excellence and shortcoming of cutting-type self-safeguard device advanced by forefathers.Based on the above facts, the article advance a new self-safeguard device_compress-type self-safeguard device.The device has its obvious advantage,result of compress-type self-safeguard device test show that the device's load-displacement curve is alike to elasticity and figure material's.which signs the success of self-safeguard device's study, affords applied element of perfect elasticity-figure mechanical model.The device can guarantee the stress of anchor rope under designed stress all the time,and obtain the aim of protecting component in anchor-hold structure.The device doesn't restrict structural displacement, limit the strain in the next structure, he whole structural system can redistribute its internal force through its stain in order to obtain proper by itself of structural internal force, which form the base of structural protect and proper by itself. Based on the success of self-safeguard device study,the article advances the concept of design method of limited force,and studys the design method to several familiar anchor-hold structure in geotechnical engineering,reseach show that the structural system has much excellence,such as easy computation,safety and credibility,economy and apply,and so on.What's more,the design method can resolve many problems that traditional method can't resolve. At last,the article choose an actual engineering to calculate with limited-element mothed,calculation result show that the use of self-safeguard device can assure of safety of anchor-hold structure with limited state of carrying capacity aspect,but also assure of structural natural use with state of natural use aspect.