湖底隧道联络通道冻结加固施工技术研究

Research on Freezing and Strengthening Construction Technology of Lake-Bottom Tunnel

【目的】湖底隧道施工通常具有地质条件复杂、难度系数大、危险性高等特点,为研究冻结法在隧道下穿湖底联络通道中的施工技术要点,依托某实际地铁工程展开研究。【方法】结合地质勘察资料,综合湖底特殊地质条件及水文概况,设计采用冻结加固技术预先对周围土体进行处理,合理设计和优化开挖与构筑施工技术,对相关施工风险进行分析并提出解决措施。【结果】结果表明,冻结法施工具有较高的安全可靠性,且适用于各种复杂的水文地质,如软土、流砂以及高水压和高地压地层。【结论】本研究对城市地铁湖底联络通道的安全和有效施工具有一定的参考意义。

[Purposes]The construction of tunnel under lake is usually characterized by complex geologi-cal conditions,high difficulty coefficient and high risk.In order to study the construction technology of freezing method under the tunnel through the liaison channel under lake,this paper relies on a practical subway project to carry out research.[Methods]Combined with the geological survey data,the special geological conditions and hydrological situation of the lake bottom were comprehensively analyzed,and the surrounding soil was pre-treated by freezing reinforcement technology,the excavation and construc-tion technology was reasonably designed and optimized,and the related construction risks were analyzed and solutions were proposed.[Findings]The results show that the freezing method has high safety and re-liability,and is suitable for various complex hydrogeology,such as soft soil,fluid sand,high water pres-sure and high ground pressure formation.[Conclusions]This study has certain reference significance for the safe and effective construction of the lake-bottom communication channel of urban subway.