Recently, with the completion of the extubation of the last frozen tube, the shield passed the freezing and reinforcement area smoothly, marking the perfect completion of the freezing and reinforcement project of the large shield starting from the Qinwang Passage in Fuyang District, Hangzhou City.

It is reported that a total of four rows and 92 freezing holes are designed for this project. This is also the first time that the company has used four rows of group holes for local freezing and reinforcement since the construction of the tunnel door reinforcement. Drilling quality, deflection control and frost heave control are the key difficulties in construction. In order to ensure the smooth implementation of the project, since the start of construction, the company has made concerted efforts, combined with the optimization of drawing design, dynamic simulation and frozen development of aprons, to formulate construction plans, and adopted a combination of grouping, zoning, sectional, and time-based control methods to ensure The freezing pressure of the group holes is fully released, thereby greatly reducing the risk of freezing pipes breaking due to frost heave.

The smooth closing of the freeze has been highly praised by the owner, which fully reflects the company's strong strength in the field of freezing technology, and also further consolidates the company's influence in the field of municipal freezing, for the next market development of municipal freezing. laid a solid foundation.