With the construction of a large number of transmission line projects

the proportion of mining-affected areas along the line is increasing day by day. Under the influence of mining activities

the ground surface at the foundation of transmission tower may move and deform

resulting in foundation tilt

tower deformation and other hazards. The hollow protective slab foundation has been successfully applied in miningaffected areas of UHVDC transmission lines

and has achieved good results and engineering application experiences. However

it has a poor adaptability to terrain

huge excavation volume and[JP] serious soil and water loss. Combined with the design experiences of steel members and long and short legs

a connection mode is proposed to move the rigid partition upward and set a new type of adjustable steel pipe truss below the partition surface so as to replace the hollow protective plate foundation

which can effectively improve the towers′ ability to withstand surface deformation and to adapt to the terrain.