Construction method for shield holing under complicated working conditions

The invention relates to a construction method for shield holing under complicated working conditions. The method comprises the following steps of: 1, strengthening a shield inlet opening; 2, making a shield pass through a wall; and 3, making the shield hole, namely reducing the tunneling speed when a shield machine enters a strengthening area, wherein the tunneling speed is regulated from the original 4cm/min to the range of between 1.0 and 1.5 cm/min, and the pressure of a soil cabin is reduced to 2kg/cm when the shield machine enters the strengthening area by 0 to 2.0m; the pressure of the soil cabin is reduced to 1.5kg/cm when the shield machine enters the strengthening area by 2.0 to 4.0m; the pressure of the soil cabin is reduced to 1kg/cm when the shield machine enters the strengthening area by 4.0 to 5.0m; and the pressure of the soil cabin is reduced to 0kg/cm when the shield machine enters the strengthening area by 5.0m; and supplementing and injecting cement grout through a reserved injected hole of an air shaft bottom plate in time according to the subsidence monitoring conditions of an air shaft when the shield machine enters the bottom of the air shaft for tunneling so as to ensure the safety of the air shaft. By the construction method, the shield can favorably hole, and the safety of surrounding buildings and underground pipelines can be ensured.