摘要
上海地铁四号线修复工程中采用水平冻结法进行修复段隧道和已建完好隧道之间的暗挖贯通施工,取得圆满成功。利用基于"一线总线"的冻结法温度监测系统进行现场实时监测。并依据监测数据,判别了冻结管是否漏盐水以及完好隧道段冻土壁的封水效果,得出了冻土壁温度场形成规律,计算出积极冻结期结束时间,分析了各施工工序对冻土墙温度影响。分析结果表明,温度是判断冻土壁特征的重要指标。通过合理布置温度监测点,采用信息化温度监测手段,掌握冻结壁发展的规律,可确保冻结法施工安全。
The artificial horizontal ground freezing method was used to underground excavation in line 4 recovering project in Shanghai Metro. The successful excavation connected the well completed tunnel with recovering tunnel. The frozen soil temperature was real-time monitored by a system based on ＂l- wire Bus＂. According to the temperature, the situation of leaking brine in freeze-tubes and watertight result outside the completed tunnel was judged. The temperature field character of the frozen, soil the end time of active freezing and the variation of temperature affected by the excavation were analyzed. The result shows temperature is the key parameter to analyze the quality of the frozen soil. By proper distribution the monitoring point, real-time and informative monitoring method, and well grasp of the regulation of law of frozen soil, safety construction of freezing method can be ensured.
出处
《安徽建筑工业学院学报（自然科学版）》
2008年第3期21-25,共5页
Journal of Anhui Institute of Architecture(Natural Science)
基金
国家自然科学基金资助项目(50578120)
关键词
水平冻结
隧道修复
温度场
“一线总线”
horizontal freezing
tunnel recovery
temperature field
“1-wire Bus”
