Application of"Horizontal Freezing+Steel Casing"Reception Technique in Water-Rich Layers for Shield Tunneling
In order to ensure the smooth execution of shield tunnel reception projects in water-rich lay-ers,it is necessary to adopt appropriate reinforcement measures to mitigate risks such as water and sand inflows.Focuseing on a shield tunneling reception project in Suzhou metro as the research object,a se-lection of the"horizontal freezing+steel casing"reception scheme is carried out by scheme comparison,theoretical analysis,and overall consideration of engineering conditions in this paper.Key design parame-ters of the frozen curtain are determined through theoretical calculations.During construction process,temperature field development is analyzed through strata temperature monitoring,while the impact of the construction scheme on shield tunneling is assessed through ground surface settlement monitoring.Fur-thermore,key technologies in freezing construction are summarized,and the construction impact is evalu-ated.The results demonstrate that the proposed freezing construction scheme is safe and feasible,provi-ding practical reference for similar engineering projects.
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