基于掘进参数的TBM破碎带施工围岩稳定性分析Stability analysis of surrounding rock in TBM fracture zone construction based on tunneling parameters
张志强;王旭春;卢泽霖;朱既贤;曹希奎;冯志威;
摘要(Abstract):
依托青岛地铁4号线某双护盾TBM施工区间,对TBM穿越破碎带过程中的推力、扭矩、转速及贯入度进行了统计分析;引入二次转化参数比推力及比扭矩,基于该参数结合施工过程对破碎带围岩稳定性进行分析.研究表明:TBM穿越破碎带施工过程中,当比推力在300kN/mm内、比扭矩在100kN·m/mm内均匀变化时,围岩稳定、施工安全;当比推力及比扭矩异常增大时可能发生掌子面坍塌问题;当比推力高于正常值时,可能为围岩松散、压住盾体;当比扭矩高于正常值时,刀具、刀盘可能被渣土糊住.此方法可以及时判定围岩稳定性和施工工况,保证掘进安全.
关键词(KeyWords): 双护盾TBM;破碎带;掘进参数;比推力;比扭矩;围岩稳定性
基金项目(Foundation): 国家重点研发计划项目(2018YFC1505302)
作者(Author): 张志强;王旭春;卢泽霖;朱既贤;曹希奎;冯志威;
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参考文献(References):
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