Along with the further progress of the West Development

and wide application of the latticed steel tubular tower

double circuits on same tower and many circuits on same tower in UHV transmission lines

inserted foundation also got the extensive application

but theoretical study is a long way behind engineering practice. A set of pullout loading test equipment for model test of the pullout behavior of inserted foundation was designed

testing and date-gathering apparatuses of outer force

inner force

anchoring force and deformation are introduced in detail including the testing scheme

approaches and processes.