Freezing method for tower-footing foundation pit of power transmission and transformation project

The invention discloses a freezing method for a tower-footing foundation pit of a power transmission and transformation project. The method comprises the following steps of preparation before construction, determination of a freezing manner, determination of the freezing parameters, determination of the radius and the number of holes of freezing arrangement, determination of temperature-measuring holes and hydrological holes, selection of freezing pipes and drilling equipment, drilling and connection of main pipes, and in-place arrangement of a machining base and the equipment, connection of pipelines and the equipment, debugging and test run of the equipment and running monitoring, test excavation and official excavation. According to the freezing method for the tower-footing foundation pit of the power transmission and transformation project, the strength and stability of the foundation pit can be guaranteed, the foundation pit is isolated from underground water, and the problem about earth rock excavation under the condition that the geological conditions are poor, the underground water level is high, and drainage cannot be achieved is solved effectively.