Due to the limitation of traffic conditions

the countermeasures for confined water foundation of transmission lines in mountainous areas are limited

and once the problems such as foundation deflection and settlement occur

it is very difficult to deal with

and even will affect the safe operation of transmission lines. Combined with an engineering example

the deflection and settlement problem of straight-column big-plate foundation for confined water foundation of transmission line in mountainousarea is analyzed and renovated through numerical simulation

and the treatment effect is verified by two years of long-term continuous observation data. The verification results show that the proposed treatment method is effective and reliable

which can provide a guidance for engineering practice.