Research Of Deformation Observation And Settlement Evaluation On High-Speed Railway Underline Engineering

The settlement of high-speed railway line structure is a small order of magnitude, usually the largest settlement is an order of magnitude bigger than the settlement observation precision, and relatively volatile, so small fluctuations in the measured data would have predicted a greater impact, whether the curve fitting methods which have been widely used in the soft and other large land-based settlement prediction of deformation applied to such "small magnitude, large fluctuations" situation, forecast results and the parameters of evaluation indicators can meet the requirements of rules are yet to be studied.This paper relies on analysis of the Beijing-Shanghai high-speed railway settlement assessment project, in connection with the high-speed rail line settlement "small magnitude, large fluctuations" characteristics, using the Beijing-Shanghai high-speed railway settlement deformation observation data, four commonly used settlement prediction methods The applicability of high-speed railway, and on this basis, the assessment of existing rules to make the appropriate supplement, and finally introduces a settlement prediction method which is suitable to high-speed railway deformation characteristics-" index of the deformation process(exponential curve method)".To sum up, the main contents and results of this paper is as follows:1. More detailed description of the high-speed railway line deformation observation and assessment of technical requirements analysis;2. Through analysis of the deformation data of Beijing-Shanghai high-speed railway,the thesis summarized high-speed rail line proposed settlement structure characteristics, and on this basis, the assessment made by the appropriate supplementary rules;3. Comparative analysis of the applicability of four common settlement prediction methods-hyperbolic, exponential curve, Asaoka method and gray theory method in high-speed railway, and on this basis, more suitable correlation coefficients requirement is proposed for Beijing-Shanghai high-speed railway settlement characteristics;4. Introduces an appropriate settlement prediction method-"index of the deformation process(exponential curve method)" for high-speed railway deformation characteristics, and verify its applicability.