强透水砂卵石地层泥水盾构掌子面塌方处理措施研究  

Study on Treatment Measures for Face Collapse of Slurry Shield in Strong Permeable Sandy Cobble Stratum

作　　者：姚志刚[1] 郭建宁[1] 方勇[1] 全雪勇 

机构地区：[1]西南交通大学交通隧道工程教育部重点实验室,四川成都610031 [2]中铁十六局集团有限公司,北京100018

出　　处：《施工技术》2017年第8期64-67,共4页Construction Technology

基　　金：国家自然科学基金(51278422;51578460);国家科技支撑计划课题(2012BAG05B03);四川省青年科技基金(2012JQ0021)

摘　　要：强透水砂卵石地层具有透水性强、黏结性差等特点,盾构隧道下穿强透水砂卵石软弱地层易出现掌子面失稳、塌方等问题,对施工效率和安全造成很大影响,掌子面失稳塌方后采取正确处理措施可以有效降低施工风险,避免塌方进一步扩大。结合兰州地铁一号线工程实例,介绍了强透水砂卵石地层盾构施工过程中掌子面塌方处理措施及后续掘进过程中防止进一步塌方的预防措施。经实践验证一系列措施的实施取得了良好的效果。The strong permeable sandy cobble stratum has the characteristics of strong permeability and poor bonding. When the shield tunnel excavates in strong permeable sandy cobble stratum,the tunnel face collapses easily,efficiency and safety of construction may be affected. When the tunnel face collapse occures,taking correct measures can reduce the construction risk effectively and prevent further collapsing. Based on the project of Lanzhou metro line No. 1,tunnel collapse treatment measures and preventive measures of excavation in strong permeable sandy cobble stratum are introduced. The facts prove that these measures have played a good effect.

关 键 词：隧道工程 地铁 强透水砂卵石地层 盾构 掌子面 塌方 

分 类 号：U455[建筑科学—桥梁与隧道工程]