粉质地层条件下盾构隧道下穿河道施工技术

Powder texture layer under the condition of construction technology of shield tunnel under passing

对粉质地层条件下地铁盾构隧道施工过程中影响河道安全因素进行了分析,通过综合评判盾构掘进过程中的土仓压力、注浆参数、注浆量及注浆压力控制、盾构姿态控制等多个指标,确定了合理的盾构掘进参数及有效的隧道上浮控制措施,确保了盾构隧道的安全施工。

In view of the powder texture layer under the condition of subway shield tunnel construction process of safety factors is analyzed,based on the soil in the process of shield tunneling warehouse grouting pressure,grouting parameters,grouting quantity and pressure control and shield posture control,multiple indexes comprehensive evaluation to determine the reasonable of shield tunnel excavation parameters and effective buoy-ancy control measures,to ensure the safety of the shield tunnel construction.