地铁隧道内静力水准观测的精度研究.pdf
1 / 10 地铁隧道内静力水准观测的精度分析 付和宽 液面波动范围 将观测数据的最大值减去最小值可以得到每台仪器液面的最大振幅 包含列车震动影响的观测中误差 根据中误差计算公式,计算得到每一台静力水准仪观测数据的中误差如下。 表2包含列车震动影响的单台仪器观测中误差 序号1 2 3 4 5 6 7 8 点号RJ00RJ01RJ02RJ03RJ04RJ05RJ05-1RJ06 总体偏差 有、无列车通过两个阶段的观测精度 将液面波动时间内的数据剔除,可以计算得出每一台静力水准仪平段. 地铁隧道内列车通过后,静力水准液面稳定的最短时间约为2分钟。 (2. 地铁隧道内列车按照约7分钟的间隔有规律的通过观测点时,多个列车运行周期的静力水准观 测总体平均中误差约为± 0.2mm,最大约为 ± 0.3mm。 (3. 地铁隧道内列车按照约7分钟的间隔有规律的通过观测点时,剔除波动观测数据后平段观测数 据的中误差小于± 0.1mm,平均约为 ± 0.02mm。表明剔除列车震动引起的观测数据后,静力水 准观测精度很高。 (4. 地铁隧道内列车通过观测点时,观测数据波动最大达到1.5mm,观测值平均中误差约为± 0.2m m。 (5. 列车停运后,静力水准观测总体平均观测中误差约为±0.01mm。 地铁隧道内静力水准观测的精度分析 付和宽 10 / 10 AbstractIts required to know deformation of Subway structure real-timely during important and dangerous projects are carrying out in the areas which be protected by urban rail ransportation department. Hydro-static levelingis an important method inautomatic vertical movement measurement of subway tunnel structure. At present in our country there is short of research aboutobservational accuracy analysis of hydro-static leveling in subway tunnel. This paper presentsresearch about observational accuracy analysis of hydro-static leveling insubway tunnel and the observational accuracy analysisis influenced during trains running by remote- measuring hydrostatic level which set up in subway tunnel and data analyzed . Provide a reference for observational accuracy analysis of automatic measuring, measured data trade-off and reliability analysis of deformation data. Key words Hydro-static leveling, Observational accuracy analysis, mean-square error, Subway tunnel, 【作者简介】 :付和宽,男, 32岁,上海岩土工程勘察设计研究院有限公司轨 道交通所所长,工程师,主要从事数字化测量、桥梁和隧道控制测量、建筑变形测量及轨道交通 监护监测的研究与运用工作。