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Study on Visualization and Numerical Analysis of Settlement of Road Embankment on Soft Soil Ground of Freeway

Author: ChenShuCun
Tutor: GaoZhengXia
School: Hohai University
Course: Geological Engineering
Keywords: Soft Ground Settlement Field measurement Database technology Visualization Technology Numerical Analysis Sensitivity analysis
CLC: U416.1
Type: Master's thesis
Year: 2006
Downloads: 202
Quote: 2
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Abstract


Over the last decade, in the highway construction localities have been carrying out a large-scale settlement observation work, accumulated a large number of field measurement data. These valuable field test data is a direct reflection of actual settlement development process through the collation and analysis of field measurement data can be time to modify and adjust the construction plan to ensure the safety and construction speed and quality embankment construction. Therefore, the emphasis on the collation and analysis of the measured data has a major engineering and practical significance. The traditional methods defect: heavy workload, low efficiency, especially in face of the massive amount of data information, is very difficult to deal with, is very conducive to the management of data and queries, and reflect the overall deformation and subsidence of the embankment with time and space state of development. In order to overcome the deficiencies of traditional research methods, based on database technology, using VB6.0 as development tools Surfer secondary development, and the preparation of soft foundation settlement system software visualization can be timely, quick settlement data management, query, statistics, and automatically mapping real-time three-dimensional subsidence surface chart, and dynamic presentation and rotate the view of the process of settlement by calling a number of data files, in order to better service for the project. Taking into account the field measurement failings unable to obtain the relevant data, such as pre-construction, In addition, the arrangement in the construction process, the number of observation points and observations are always limited, can only reflect local information, it is difficult to intuitive reflect the complete picture of the development and changes accumulate experience for future construction projects, in order to grasp the essence of the problem, the theoretical analysis and numerical analysis is also a rewarding job field measurement based on soft foundation settlement. Numerical analysis method can take into account the nonlinear, elastoplastic and anisotropic characteristics of the soil, to accurately reflect the relationship between pore pressure dissipation and soil skeleton deformation, and can be used to simulate the actual situation and the complex boundary conditions, so a wide range of applications in the field of theoretical research. Further, in the procedure determined by the model parameters, due to the sampling of sample preparation, the test apparatus, the test methods and process, testing personnel operating proficiency and many other factors, so that the various parameters to vary widely, and will have some impact on the calculation results. Take a sensitivity analysis on the impact of model parameters on the calculated results to the finite element method, in order to determine the effects of the main parameters of the soft roadbed settlement, to provide a scientific basis for the soil test and theoretical studies.

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CLC: > Transportation > Road transport > Road works > Roadbed, pavement engineering > Subgrade
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