软土地区路基沉降和侧向变形影响的预测分析

发布时间：2018-03-15 23:11

本文选题：沉降预测　切入点：沉降观测　出处：《河北工业大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着我国经济和科学技术的快速发展，连结城市之间的高速公路也在大力度的建设运行，在我国沿海地区软土地基上修筑高品质公路更会有效促进国民生产和经济发展，但是在建设过程中由于软土地基的土体特性影响使得我国要面临的困难越来越多。软土地基含水量大、压缩性高、抗剪性低，并且施工结束后地基的沉降更是潜在的影响道路正常使用和安全运输的较大危害，，因此在道路地基修建之前我们要进行大量的实际观测，取得第一手资料进行分析预测通过现有阶段的计算方法得出精确的处理方案，因此在近些年研究软土地基沉降分析是一个较深远的课题。因此，针对软土地基沉降的计算和预测的研究是具有使得我国经济加速发展和道路交通建设的更顺利的重要意义。本文首先综合阐述了软土地基沉降计算的国内外现状，详细的推导了地基沉降和考虑侧向变形对沉降影响的计算公式，依据观测数据加以比较分析预测方法的可靠性。根据在对软土地基进行处理之前的信息少和不确定因素较多的状况，建立了灰色系统理论模型来预测地基沉降的情况。通过在唐津高速公路沉降观测段得来的数据与预测结果进行比较证明模型的准确可靠性，但必须提出的问题是各地地质条件差异较大，在不同情况的地域的影响因素不同，需要大量的工程实践和修正才能更加完善理论模型，最终将预测方法实施到工程中。
[Abstract]:With the rapid development of economy, science and technology in our country, the highway between the connecting cities is also being built and running vigorously. The construction of high quality highways on the soft soil foundation in the coastal areas of our country will effectively promote the national production and economic development. However, in the process of construction, due to the influence of the soil characteristics of soft soil foundation, there are more and more difficulties to be faced in our country. The soft foundation has high water content, high compressibility and low shear resistance. And the settlement of the foundation after the construction is even more potentially harmful to the normal use of the road and the safe transportation. Therefore, before the construction of the road foundation, we have to carry out a large number of practical observations. Obtaining firsthand data for analysis and prediction, the accurate treatment scheme can be obtained by the calculation method in the present stage. Therefore, in recent years, it is a far-reaching subject to study the settlement analysis of soft soil foundation. The research on calculation and prediction of soft foundation settlement is of great significance to accelerate economic development and road traffic construction in China. In this paper, the present situation of settlement calculation of soft soil foundation at home and abroad is introduced, and the calculation formulas of settlement and lateral deformation are deduced in detail. The reliability of the prediction method is compared and analyzed on the basis of observational data. Based on the fact that there is less information and more uncertainties before the treatment of the soft soil foundation, The grey system theory model is established to predict the settlement of the foundation. The accuracy and reliability of the model are proved by comparing the data obtained from the observation section of the settlement of Tangjin Expressway with the predicted results. But the problem that must be raised is that the geological conditions are quite different and the influencing factors are different in different regions. It needs a lot of engineering practice and correction to perfect the theoretical model and finally the prediction method is applied to the project.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.1

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