Steel blade corner entering-soil box culvert jacking device and construction method

The invention relates to a steel blade corner entering-soil box culvert jacking device and a construction method. The steel blade corner entering-soil box culvert jacking device comprises a box culvert body. The front end of the box culvert body is provided with a mobile steel blade corner which is embedded in the front end of the box culvert body and reciprocates in the jacking direction of the box culvert body. The front end face of the box culvert body is provided with a blade corner jack jacking and pressing the mobile steel blade corner to move forward. The construction method adopts the mode that the mobile steel blade corner and the box culvert body are alternately jacked. The steel blade corner entering-soil box culvert jacking device and the construction method have the beneficial effects that the capacities that the steel blade corner and a box culvert are jacked into a roadbed are remarkably improved, the front end of the mobile steel blade corner is kept in a soil layer of the roadbed in the const