摘要
以苏州地铁8号线娄中路站端头始发工程为例,采用冷冻法技术解决了承压水和土体自稳能力差的问题,防止了端头坍塌和涌水、涌砂等风险。具体分析了冷冻法施工流程,以及在冷冻始发条件下可能产生的灾变控制措施与效果。施工中,通过在围挡区域内注入双液浆进行加固,使得累计沉降量得到有效控制,最大沉降量为11mm。此外,冷冻时间过长导致的土体强度过高和盾构掘进参数不合适是导致娄中路站端头超挖的主要原因。
Taking the end launching project of Louzhong Road Station of Suzhou Metro Line 8 as an example,the freezing method is used to solve the problem of poor self-stability of confined water and soil,and to prevent the risk of terminal collapse,water gushing,and sand gushing.The construction process of the freezing method and the possible disaster control measures and effects under the condition of freezing initiation are analyzed in detail.In the construction,to deal with the accident and disaster,double liquid slurry is injected into the enclosure area for reinforcement so that the cumulative settlement is effectively controlled,and the maximum settlement is 11mm.In addition,the excessive soil strength caused by too long freezing time and the inappropriate shield tunneling parameters are the main reasons for the over-excavation at the end of Louzhong Road Station.
作者
刘招伟
LIU Zhaowei(China Railway Electrification Bureau Group Co.,Ltd.,Beijing 100036,China)
出处
《施工技术(中英文)》
2025年第7期123-128,共6页
Construction Technology
基金
中铁电气化局集团有限公司科研课题:多线叠合隧道近距离穿越施工灾变机理与控制技术。
关键词
地铁
盾构
隧道
冷冻法
灾变控制
施工技术
沉降
subways
shields
tunnels
freezing method
disaster control
construction
settlement
