A pressuring balancing device for starting
shield machine used in the technical field of tunnel driving comprises steel, end cover, reaction frame, supporting device, sealing mechanism and
shield machine; the pressuring balancing device for starting
shield machine is fixed at the starting end; its
divided structure is able to place the shield
machine in; the steel structure is fixed with the supporting device to lead the shield
machine to drive along the appointed track; when the shield
machine enters into the soil by the reaction frame, the excavation face is balanced by exerting pressure on front part of the cutter head; the sealing mechanism firmly seals the earth pressure and
water pressure at the front part of the shield machine; the shield machine continuously moves forward; when the segments are assembled in the pressuring balancing device, the synchronized grouting is started; the
slurry is enveloped by the end cover so the shield machine is able to use its soil pressure and the
slurry balancing function to start the normally drive. The device does not need to strengthen the soil around the starting end and drives through establishing soil pressure balancing or
slurry balancing by the device, which reduces the construction cost and the
failure rate and does not limit the geological conditions and protect the environment.