烟台金山港地区软土地基沉降特性与稳定性研究
发布时间：2018-08-28 19:42
【摘要】：软土具有强度低、压缩性高、渗水性差等特点，在其上修筑公路时面临着沉降过大与稳定性不足等问题。砂井堆载预压法作为排水固结的一种常用的地基处理方法，能够有效地解决软土地基的沉降和稳定性问题。本文所依托工程位于烟台市金山港地区，针对该地区软土地基的工程性质特点，选用砂井堆载预压法对该地区软土地基进行处理。具体研究内容如下： （1）根据烟台金山港地区软土地基的工程地质概况，确定现场试验堆载方案及沉降观测方案。根据现场监测数据，归纳总结地基沉降变化规律并对其稳定性进行分析，从而有效地指导工程施工。 （2）对常用的软土地基处理方法进行概括，并对国内外软土固结理论及稳定性研究现状加以研究总结。 （3）用双曲线法、指数法和星野法三种曲线拟合方法对软土地基最终沉降量进行预测，分析拟合结果得出：用双曲线拟合的结果与实测值最为接近，拟合效果最好，最适合该工程，指数曲线法次之，星野法拟合的效果相对较差。 （4）借助于有限元软件，对烟台金山港工程实例中软土地基的沉降与稳定性进行了模拟分析，，模拟结果与实测情况较吻合。并用有限元对改进后的软基处理方法进行模拟分析，得出更适合该地区软土地基的处理方法。
[Abstract]:Soft soil is characterized by low strength, high compressibility and poor water permeability. As a common foundation treatment method for drainage consolidation, sand well surcharge preloading method can effectively solve the settlement and stability problems of soft soil foundation. The project based on this paper is located in Jinshan Port area of Yantai City. According to the engineering characteristics of soft soil foundation in this area sand well loading preloading method is used to treat soft soil foundation in this area. The specific research contents are as follows: (1) according to the engineering geological situation of soft soil foundation in Jinshan Port area of Yantai the site test loading scheme and settlement observation scheme are determined. According to the field monitoring data, the variation law of foundation settlement is summarized and its stability is analyzed, which can effectively guide the construction of engineering. (2) generalize the common treatment methods of soft soil foundation. The present research situation of consolidation theory and stability of soft soil at home and abroad is summarized. (3) the final settlement of soft soil is predicted by hyperbolic method, exponential method and astrological method. The results of analysis and fitting show that the hyperbolic fitting results are most close to the measured values, the fitting effect is the best, the exponential curve method is the second, and the field method is relatively poor. (4) with the aid of the finite element software, The settlement and stability of soft soil foundation in Yantai Jinshan Port project are simulated and analyzed. The simulation results are in good agreement with the measured results. The improved soft foundation treatment method is simulated and analyzed by finite element method, and a more suitable treatment method for soft soil foundation in this area is obtained.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.1
本文编号：2210415
[Abstract]:Soft soil is characterized by low strength, high compressibility and poor water permeability. As a common foundation treatment method for drainage consolidation, sand well surcharge preloading method can effectively solve the settlement and stability problems of soft soil foundation. The project based on this paper is located in Jinshan Port area of Yantai City. According to the engineering characteristics of soft soil foundation in this area sand well loading preloading method is used to treat soft soil foundation in this area. The specific research contents are as follows: (1) according to the engineering geological situation of soft soil foundation in Jinshan Port area of Yantai the site test loading scheme and settlement observation scheme are determined. According to the field monitoring data, the variation law of foundation settlement is summarized and its stability is analyzed, which can effectively guide the construction of engineering. (2) generalize the common treatment methods of soft soil foundation. The present research situation of consolidation theory and stability of soft soil at home and abroad is summarized. (3) the final settlement of soft soil is predicted by hyperbolic method, exponential method and astrological method. The results of analysis and fitting show that the hyperbolic fitting results are most close to the measured values, the fitting effect is the best, the exponential curve method is the second, and the field method is relatively poor. (4) with the aid of the finite element software, The settlement and stability of soft soil foundation in Yantai Jinshan Port project are simulated and analyzed. The simulation results are in good agreement with the measured results. The improved soft foundation treatment method is simulated and analyzed by finite element method, and a more suitable treatment method for soft soil foundation in this area is obtained.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.1
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