高速铁路隧道沉降变形分析方法的研究
Research of analytical method for tunnel settlement and deformation of high-speed railway

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。
Based on assessment projects of deformation monitoring of Chang-Zhu-Tan intercity railway project, the law of development for tunnel settlement about Chang-Zhu-Tan intercity railway is investigated. According to measured data, we found that the settlement amount of the tunnel is generally small, Using the hyperbolic fitting and the gray prediction model for the same set of settlement data of the comprehensive II standard team of Chang-Zhu-Tan, the differences between measured and predicted settlement are analysed, and the applicability of two models are compared. The results show that: The simulation of hyperbolic settlement requires a lot of samples, it can be used as a method to assess the tunnel settlement. However, the high simulation accuracy is only valid in the case of a small number of incremental cumulative settlement. Grey prediction desired sample is small, and has simple operation and high simulation accuracy. Comparing with the hyperbolic fitting, gray prediction has higher precision and universality