Vacuum preloading construction process

The invention provides a vacuum preloading construction process which comprises the following steps: constructing a plurality of drainage plates on a sand cushion layer of a soft soil foundation after the sand cushion layer of the soft soil foundation is constructed, and installing a plurality of groups of filter pipes on the plurality of drainage plates; a sealing wall is firstly constructed on the periphery of the soft soil foundation, and then a film pressing groove is constructed above the sealing wall; sealing film construction is conducted on the soft soil foundation, the sealing film is manually pressed into the film pressing ditch, water covering is conducted in time, and the sealing performance of the film pressing ditch is guaranteed; and the soft soil foundation is subjected to vacuumizing construction. The sealing wall, the sealing film, the film pressing groove and the covering water are used for sealing the soft soil foundation together, and the sealing wall and the film pressing groove are form