盾构穿越淤泥质软土含高压沼气地层的安全措施

Safety Measures for Shields Passing Soft Muddy Soil Strata Containing High Pressure Methane

通过杭州地铁1号线某区间的施工经验,阐述了盾构在软土地层中安全穿越含有害气体地层的应对措施。通过施工前排放有害气体,隧道内设置机械通风,施工过程中对有害气体的实时监测等措施,确保了整个施工期间的安全,消除了有害气体在地铁隧道施工中存在的隐患。

According to construction experience in Hangzhou Subway Line 1, the authors described the safety measures adopted for shield passing soft muddy soil strata containing high pressure methane. Harmful gases were discharged before the start of the construction. During the construction, mechanical ventilation system was installed and the level of harmful gases was monitored. These measures have successfully ensured the safety of the construction and eliminated the potential damage of methane.