Construction Technology of Freezing Method for Subway Excavated Interval Cross under the River
Freezing method construction has been widely used in urban shield tunnel contact channel,relying on Suzhou City Railway Transit Line 8 project,the less encountered subway trenching interval under the river freezing construction research.Combined with the actual working conditions of the project,through the research and judgment of the causes of water and sand gushing,the selection of freezing scheme,the pre-strengthening of filling grouting and the summary and analysis of the key processes of freezing construction,corresponding remedial measures and precautions are put forward,successful waterproofing and leakage plugging,and the overall effect of soil freezing and reinforcement is good,which meets the requirements of the safety of excavation of undercutting through the river channel,and realizes the smooth excavation of the second-phase structure and guarantees the quality of the operation.
subway tunnelexcavated intervalcross under riverliquid nitrogen freezing construction
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