高速铁路隧道沉降变形分析方法的研究

发布时间：2018-01-10 02:26

本文关键词：高速铁路隧道沉降变形分析方法的研究　出处：《铁道科学与工程学报》2016年10期 　论文类型：期刊论文

【摘要】：以长株潭城际铁路线下工程沉降变形观测评估项目为依托,研究长株潭城际铁路隧道沉降的发生发展规律,通过现场实测数据,发现隧道沉降量普遍偏小,分别用双曲线拟合法和灰色预测模型对同一组长株潭综合II标树木岭隧道的沉降数据进行拟合,并分析实测和预测沉降的差异,并比较2种模型的适用性。研究结果表明:双曲线沉降的模拟需要大量的样本,可以作为隧道沉降评估的一种方法,但是仅对少数累积沉降递增的情况模拟精度高;灰色预测所需样本小,运算简便,而且模拟精度高,因此,灰色预测相比双曲线拟合法具有更高的精度和普适性。
[Abstract]:Based on the project of observation and evaluation of engineering settlement deformation under Chang-Zhuzhou-Xiangtan inter-city railway line, the occurrence and development rule of tunnel settlement of Chang-Zhuzhou-Xiangtan inter-city railway tunnel is studied. Through field measured data, it is found that the amount of tunnel settlement is generally small. Hyperbolic fitting method and grey prediction model were used to fit the settlement data of the same group of Chang-Zhuzhou-Xiangtan integrated I-marked Shuiling tunnel, and the difference between measured and predicted settlement was analyzed. The results show that the hyperbolic settlement simulation needs a large number of samples and can be used as a method for tunnel settlement assessment. However, the simulation accuracy is high only for a few cases of increasing cumulative settlement. Grey prediction needs small sample, simple operation and high simulation precision. Therefore, grey prediction has higher accuracy and universality than hyperbolic fitting.
【作者单位】：中南大学土木工程学院;
【基金】：国家自然科学基金资助项目(51378514)
【分类号】：U456.31
【正文快照】： 由于无砟轨道对高度的可调节性很小,要求无砟轨道铺设前基础沉降必须在一个很小的范围内,本文根据长株潭城际铁路综合Ⅱ标线下工程沉降变形评估自评报告及沉降变形过程数据电子文件,选取路段为由中铁十四局承建的长株潭城际铁路树木岭隧道进树区间~树木岭车站北段YDK1+439.736

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