Blown sand cofferdam is a simple

fast

low-cost form of cofferdam

and it is widely used in water conservancy construction in the coastal areas of Jiangsu and Zhejiang. In recent years

as a rapid method to build the island

blown sand cofferdam has gradually been used in highway bridge foundation construction. However

it has never been used in transmission line construction

so there is no mature experience to draw on. This paper is to study the construction method of blown sand cofferdam. Combined with the characteristics of the power transmission construction

through improving the technology of blown sand cofferdam

it can be used in the foundation construction of transmission line.