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天津地区地下水位较高,地层含水量较大,为标准的含水软弱地层,地铁联络通道施工采用地面垂直深层搅拌桩、旋喷桩和压密注浆加固等方法,无法确保施工安全,而冻结法加固软土地层,在天津地铁建设中,起到了很好的作用。解决了联络通道开挖过程中的涌沙涌水现象,保证了施工安全。现以天津地铁3号线联络通道施工为例,对冷冻技术的应用进行了详细的阐述,并对其可行性及效果进行了分析。
In Tianjin, the groundwater level is relatively high and the water content in the formation is relatively large, which is a standard water-bearing and weak formation. The construction of subway liaison channel adopts vertical ground deep mixing piles, rotary jet grouting piles and compaction grouting reinforcement to ensure construction safety while freezing Law to strengthen soft soil formation, in the construction of Tianjin Metro, played a very good role. It solves the phenomenon of gushing water and gushing in the contact channel excavation and ensures the construction safety. Taking the construction of the communication channel of Tianjin Metro Line 3 as an example, the application of freezing technology is described in detail, and its feasibility and effect are analyzed.