TAM管注浆止水帷幕作用分析

Action Analysis of TAM Pipe Grouting Water-stop Curtain

以澳门轻轨妈阁站项目为依托,建立止水帷幕渗流模型,分析不同深度TAM管注浆止水帷幕对于基坑止水和支护的作用。结果表明:随着止水帷幕深度的增加,坑底渗流速度减小,20 m深的止水帷幕使坑底渗流速度在最终开挖阶段降低了73.7%;止水帷幕有减小支护结构侧移的作用,20 m深的止水帷幕使支护结构侧向位移在最终开挖阶段降低了94.6%。

Based on the Macao Light Rail Mage Station project,the seepage model of water-stop curtain was established,and the effect of TAM pipe grouting water-stop curtain with different depth on the water stop and support of foundation pit was analyzed.The results show that:as the depth of the water-stop curtain increases,the seepage velocity at the bottom of the pit decreases.The seepage velocity at the bottom of the pit decreases by 73.7%at the final excavation stage with the water-stop curtain at a depth of 20 m.And the water-stop curtain has the effect of reducing the lateral displacement of the supporting structure,and lateral displacement of the supporting structure is reduced by 94.6%at the final excavation stage with the water-stop curtain at a depth of 20 m.