浅覆土透水砂层泥水盾构越江技术

Technique of slurry shield trans-river in shallow covering permeable sand layers

通过工程实例介绍泥水盾构在富水砂层中过江掘进施工采用的技术措施和经验,论述了在掘进过程中合理设定各项掘进参数和制定应对措施。

Although the slurry balance shield has more advantages than the soil pressure balance shield in weak or water-rich strata,if the driving control parameters are unreasonable or the counter measures are unsuitable,the overlying strata may be broken down or the river bottom may collapse when the shield crossing the river in shallow covering perme-able sand layer.It will lead to link up the shield with the river directly and may lead to major incidents,such as tunnel submerged.This article introduces the tunneling technology used in construction practices of slurry shield tunneling across the river in water-rich sand layer.