強(qiáng)夯加固地基承載力與變形模量原位測(cè)試的試驗(yàn)研究
[Abstract]:The in-situ test is a necessary engineering method to solve the geotechnical characteristics. The plate load test method is the most direct reaction to the engineering properties of rock and soil and the most reliable method which has always been respected in geotechnical field. However, the plate load test only reflects the engineering characteristics of the soil layer in the depth range of about 2 times the width or diameter of the plate, and the testing cost is too high and the time consuming is too long to determine the engineering characteristics of each soil layer by the full use of the large-scale plate load test. The in-situ testing methods, such as in-situ standard penetration test, dynamic penetration test and Rayleigh wave test, can reflect the geotechnical characteristics economically and quickly, and can make up for the defects of plate load test. Therefore, according to the field test data, the correlation between plate load test method and dynamic penetration test, Rayleigh wave test and other fast and economical test methods is established, and the bearing capacity and deformation model table is established. The characteristics of geotechnical engineering can be reflected by dynamic sounding and Rayleigh wave testing, which has far-reaching significance for engineering practice. This article will carry on the research to it through the engineering example. In this paper, the technical theory and statistical method of plate load test, dynamic sounding test and Rayleigh wave test are introduced one by one. Secondly, according to the in-situ test data of a gravel-like dynamic compaction treatment project in Fushun, the characteristic value of bearing capacity and deformation modulus of the foundation after dynamic compaction are calculated according to different tamping energy. Finally, the plate load test, superheavy dynamic penetration test, plate load test and Rayleigh wave test were carried out, and the characteristic value of bearing capacity and the number of super heavy dynamic penetration were established. The correlation between the characteristic value of foundation bearing capacity and Rayleigh wave velocity. Based on the comparison and analysis of the empirical relationship between the results obtained and the natural foundation of the same kind of soil, the reduction coefficient is obtained, which can be used to guide the testing practice of the dynamic compaction foundation in the future.
【學(xué)位授予單位】:沈陽建筑大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2013
【分類號(hào)】:TU472.31
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