
7月7日,中铁华隧23#盾构机,历经144个日夜的艰苦跋涉,终于迎来佛山地铁三号线3204-1标项目,湾华至深村区间右线隧道贯通的光明时刻成为了佛山地铁三号线禅城段第一个贯通的盾构区间。
该项目区间右线隧道全长965.982m,既有淤泥质软土,又有上软下硬地层。掘进时,盾构隧道全程处于主干道文华路下,盾构机还需下穿砖混箱涵、人行天桥,侧穿湖景酒店等构建筑物,区间既有管线众多,施工现场周边坏境复杂。
为确保盾构施工安全,项目部精心编制安全施工组织方案,提前摸排沿线风险源,加强施工管控。在穿越沙层段时,安排人员进行24小时值班、加强地面监测,根据监测数据进行调整、优化盾构掘进参数,严格控制地面沉降,并通过智慧管理平台对现场安全、质量、进度、风险等进行实时监控。
此外,盾构机还新增了排土量自动测量系统,实时监测盾构机在掘进过程中的出土量,指导中控手合理控制油缸的推进速度和行程,有效防止出土过多或过少引起的超挖或欠挖情况,进一步细化盾构掘进参数,严控盾构掘进姿态,确保了隧道顺利贯通。
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