Automatic Monitoring Method of Highway Tunnel Shaft Construction
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摘要: 监控量测是隧道竖井信息化施工与安全的重要保障。由于竖井结构与施工空间限制,对于离掌子面较远的断面,水准仪、全站仪等常规监测手段可操作性差,使得竖井施工监测成为一个难题。依托墨临高速公路泰和隧道竖井工程,研究了一套竖井自动化监控量测方法,将该方法应用于实际施工监测,并对施工期间监测数据进行分析,总结了竖井监控量测工作的注意事项。研究成果对类似竖井施工监控量测工作具有一定的指导意义。Abstract: Monitoring and measurement in the construction of long tunnel shaft is the guarantee of construction safety. Due to the limitation of shaft structure and construction space, the operability of conventional monitoring means such as level and total station is inefficient for the section far from the working face, which makes the shaft construction monitoring a difficult problem. Based on the Taihe tunnel shaft project of Mo-Lin expressway, an automated monitoring and measurement method for shafts was studied. This method was applied to actual construction monitoring, and monitoring data during construction was analyzed. The precautions for monitoring and measurement were summarized. The research results have certain guiding significance for the monitoring and measurement of similar shaft excavation.
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Key words:
- tunnel /
- shaft /
- monitoring and measurement /
- automation /
- construction
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表 1 振弦式传感器主要技术参数
仪器 量程 准确度 重复性 分辨率 压力盒 5 MPa 1.0%FS 0.4%FS 0.01%FS 位移计 50 mm ≤0.5%FS 不大于准确度 渗压计 1 MPa 1.0%FS 0.4%FS 0.01%FS 表 2 监测项目、测点数量及测点布置
监测项目 测点数 测点布置 竖井井壁位移 39个 井壁位移每20 m一个断面,
每个断面3个测点,共布置13个断面围岩压力 39个 围岩压力每20 m一个断面,
每个断面3个测点,共布置13个断面渗水压力 13个 渗水压力每20 m一个断面,
每个断面1个测点,共布置13个断面注:所需数据线长度 地面线50 m,断面间串联线22×12=264 m,位移计(2+12+12)×13=338 m,土压力盒(2+12+12)×13=338 m,渗压计6×13=78 m,总计1068 m;所需DQ-8多点采集器13个。 -
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