Circumferential cutting type steel blade foot device for pipe jacking construction in soft foundation silt environment

The invention discloses an annular cutting type steel blade foot device for pipe jacking construction in a soft foundation silty soil environment, which comprises a socket pipe and a steel blade foot assembly, the steel blade foot assembly is arranged at one end of the socket pipe penetrating into a stratum, and two groups of bearing frames for supporting the socket pipe to transversely move are arranged on the front side and the rear side of the stratum; a cast-in-place reaction wall is arranged on the side, away from the steel blade foot assembly, of the stratum, and a driving assembly for pushing the socket pipe to be jacked into the stratum is arranged on the inner side of the cast-in-place reaction wall. The device has the beneficial effects that a set of extending frames of a step-shaped structure is additionally arranged in a working pit of a stratum, the extending frames are used for replacing assembled jacking iron in the existing jacking process to serve as a force transmission mechanism, the influe