雅泸高速公路马罗隧道穿过岩堆体的处置技术

雅泸高速公路马罗隧道穿过岩堆体的处置技术雅泸高速公路马罗隧道穿过岩堆体的处置技术 摘要：雅泸高速公路马罗隧道出口地段斜坡为第四系全新统崩坡积块石土，洞外为鲜水河断裂带，隧道出口需要从两个岩堆体中部穿过。由于岩堆体块石间架空现象严重，无自稳能力，施工隧道时易发生整体倒塌，且隧道处在岩堆体上，结构极不稳定，必须实行有效措施以保证施工安全和隧道建成后的结构稳定。施工中对隧道仰坡岩堆体采纳《岩堆体钻孔注浆固结＋超前大管棚》处治方案，结合施工中的监控量测的施工方法，达到快速、安全通过岩堆体，可供今后同类条件的隧道施工积累经验和参考。 关键词：穿过岩堆体；预注浆；超前支护 Abstract: ya ma luo lugu highway tunnel section for quaternary holocene colluvial slope soil, stone hole for fresh water river fault zone, the tunnel needs through the two central rock pile body. As rock pile body aerial phenomena between the stone, not the ability, is easy to occur the overall construction of tunnel collapse, and tunnel in rock pile body, the structure is unstable, must take effective measures to ensure construction safety and stability after completion of the tunnel structure. During the construction of the upward slope of tunnel rock pile of used drilling grouting consolidation of the rock pile body + advanced fill tent "treatment scheme, combining with the construction of the monitoring measurement methods, to achieve rapid, security through the rock pile body, for future tunnel construction experience and reference of similar conditions. Keywords: through the rock pile body; Grouting; Support in advance 中图分类号：TU74 文献标识码：A 文章编号：2095-2104(2025) 1 工程概括 1.1 地形地貌及工程地质条件 马罗隧道泸沽端与马罗特大桥的起点相连，位于四川省雅安市石棉县南桠河右岸斜坡地带。路线走向与南桠河右岸斜坡地形 55°斜交，地形坡角在 45°左右，斜坡为第四系全新统崩坡积块石土组成的岩堆体。斜坡地表为崩坡积碎、块石覆盖层，结构松散，架空现象普严重...