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Statistical Analysis of Shear Wave Velocity in Construction Sites

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Tutor: BaoJingShan
School: China Seismological Bureau, Institute of Engineering Mechanics
Course: Geotechnical Engineering
Keywords: Soil,Shear wave velocity,Depth of,Standard penetration,Statistical relationship
CLC: P315.31
Type: Master's thesis
Year:  2008
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Abstract:
The shear wave velocity reflects an important indicator of medium wave propagation ability. Soil shear wave velocity is an important parameter to reflect the dynamic characteristics of the soil. Soil shear wave velocity values ??are widely used in engineering practice. Current Seismic Design Code (GB50011-2001) \\GB50191-93), power facilities seismic design specifications (GB5060-96) and the nuclear power plant seismic design specification (GB50267-97) \Therefore, the study of shear wave velocity related to science and technology is one of the important research content of the current field of geotechnical engineering seismic important practical significance and theoretical value. In the field of seismic research, soil shear wave velocity values ??used to determine the seismic input interface, the soil seismic response analysis and site classification. The soil is a complex geological body. The shear wave velocity in different conditions due to different soil genesis, structure, composition, and the history of the formation of different makes show much difference. The shear wave velocity in some cases tend to be difficult due to the limitations of the testing methods and test conditions, or less than ideal. Therefore, the use of existing data for statistical analysis, analysis of the regularity of its distribution characteristics and statistical significance is a meaningful work. This paper focuses on the statistics of the shear wave velocity data analysis to carry out the following work. 1 This paper describes a method for determining soil seismic response analysis including the shear wave velocity parameters and the parameters of the status quo. Determine the vibration input time, the determination of the seismic input interface engineering site shear wave velocity determination and the determination of soil nonlinear relationship is analyzed and described in detail, and pointed out the existing problems. This paper describes the principles and use of the various instruments of the shear wave velocity test the engineering sector widely used in China. The scope of application of the various instruments, a variety of testing methods and the data analyzed comparative analysis, pointed out the advantages and disadvantages of each. 3, collected test data of the 121 project sites in the central region of the Songnen Plain 356 drilling shear wave velocity test and standard penetration test. These data are mainly located in Harbin and its surrounding areas. The information collected to classify and organize, summarize the main features involved in various types of soil, classification and statistics distribution characteristics of various types of soil at different depths within the shear wave velocity values. In this paper, the method of regression analysis of the relationship between different soil shear wave velocity and soil depth statistical analysis. For the first time given the statistical value of the coefficient of each department in Harbin and the surrounding areas of shear wave velocity and depth statistical mathematical expressions and formulas. The test results prove that this statistical relationship value of important guiding significance for engineering applications. 5, the statistical analysis of soil standard penetration test blow count and the relationship between the shear wave velocity, shear wave velocity, standard penetration depth of the relationship between the statistics. Gives the statistical value of the respective coefficients in the mathematical expressions and formulas. This result is also of great significance for engineering applications. It should be pointed out, the Mathematical Statistics certain representative, but this result by the number of samples and quality control. This article is only based on limited information and a local area preliminary statistical relationship between the shear wave velocity with depth. This is a preliminary exploration, a little early to estimate the shear wave velocity values ??of this region have some reference value. I believe that with the sample quantity and improving the quality and value of this outcome will become increasingly high. Scientific research in the final analysis is to explore, discover that there will be inevitable errors, inappropriate in this article, please criticize correction.
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