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砂卵石富水地层具有结构松散、空隙率大、易流动坍塌等特点,在开挖过程中自稳能力极差,故开挖前需采取超前注浆加固措施,通过合理选择注浆材料和浆液的配比、注浆压力、注浆范围等,以达到加固地层保证隧道施工安全和周边环境稳定的目的。介绍了北京地铁十号线苏州街暗挖车站在砂卵石富水地层所采取的注浆加固施工技术。
Water-rich sandstone-pebble stratum has the characteristics of loose structure, large voidage and easily collapsing. Due to its poor self-stabilizing ability during excavation, advanced grouting reinforcement measures should be taken before excavation. Through proper selection of grouting material and slurry The ratio of grouting pressure, grouting range, etc., in order to achieve the purpose of strengthening the stratum to ensure the construction safety of the tunnel and the surrounding environment. This paper introduces the grouting reinforcement technology adopted by the underground excavation station of Suzhou Street on the 10th line of Beijing Subway in sand-pebble-rich water stratum.