论文部分内容阅读
研究目的:地铁车站施工工期长,技术复杂,温度值的采集难度大,国内外在地铁车站温度测试试验方面尚较缺乏。为给地铁车站温度及温度应力理论分析提供试验数据支持,对地铁车站进行温度跟踪测试与分析。研究结论:以上海某地铁车站两诱导缝间的施工段为温测对象,测得施工期各点的时程温度值。经温测数据统计分析得出:在浇筑初期,混凝土温度主要受水化温升与气温条件的影响,并以水化温升的影响为主,在浇筑的中后期,地铁车站的温度变化趋势与气温演化趋势基本一致,且底板与靠近诱导缝处的最大日温降高于其它部位,顶板、底板的最大内外温差高于内衬墙。基于试验数据分析,进一步在温度荷载定义与现场养护方面提出了建议。
Research purposes: The subway station has a long construction period, complex technology and difficult temperature data collection. It is still scarce in the temperature test at subway station at home and abroad. In order to provide experimental data support for the theoretical analysis of temperature and temperature stress of metro stations, temperature tracking test and analysis of subway stations are carried out. Research conclusions: Taking the construction section between two induced joints of a subway station in Shanghai as the object of temperature measurement, the time-temperature values of each point in the construction period are measured. According to the statistical analysis of temperature measurement data, the concrete temperature is mainly affected by the temperature and the temperature of hydration at the initial stage of pouring, and the influence of hydration temperature rise is the main factor. During the pouring, the temperature change trend of metro station And the trend of temperature evolution is basically the same, and the maximum daily temperature drop between the bottom plate and the induction slit is higher than other parts. The maximum internal and external temperature difference between the top plate and the bottom plate is higher than that of the inner lining wall. Based on the experimental data analysis, further suggestions on temperature load definition and on-site maintenance are put forward.