Earth anchor design predictions:

Recovery variants of two U.K. Armoured Fighting Vehicles have been designed in the last decade and are now in production. In each case anchor blade designs for the variants were tested at model scale in soil bins at the Royal Military College of Science. This paper describes the techniques involved in the modelling process, the results from the trials and comments on the efficacy of model testing in the field of soil-vehicle interaction.  FMEA evaluation criteria,failure severity evaluation criteria,failure frequency evaluation criteria and failure detection degree evaluation criteria for earth anchor are set to establish FMEA analysis sheet for earth anchor support system,in deriving the various failure modes for existing of the system and point out responsible department of the failure mode.RPN value of earth anchor is analyzed and four high risk diseases of earth anchor are obtained i.e.shear failure between earth and concrete,shear failure between concrete and reinforcement bars,pulling destroy of earth anchor and direct destroy of anchor.It is known is analyzed high risk diseases of earth anchor are mainly focused on anchor segment which is mainly in the charge of the construction department.Therefore,to strengthen the design,and intensify construction management for this part become absolutely necessary.