Risk assessment & recognition of freezing method for cross-passage construction

The cross-passage construction has a higher risk. To ensure successful implementation of the project, the risk in cross-passage construction using freezing method should be assessed and identified and appropriate measures should be taken. In this paper, the criteria for the risk assessment in cross-passage construction were established, based on the structural characteristics of the cross-passage, the hydrogeological conditions, the surrounding environment, the proposed method of construction technology and construction capacity, and seasonal factors etc. The risk grades of cross-passage construction were classified, and an engineering instance was analyzed. Besides, the causes and consequences of cross-passage construction risks were induced and, finally, effective countermeasures were proposed.