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The Research on the Compactness Measure of Roadbed Using Dynamic Testing Methods

Author: ZhaoJiang
Tutor: YuDeJie
School: Hunan University
Course: Mechanical Engineering
Keywords: Vibration test Degree of compaction Quality testing Rayleigh wave Stone Embankment
CLC: U416.2
Type: Master's thesis
Year: 2005
Downloads: 310
Quote: 5
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Abstract


China in recent years to increase infrastructure investment , the rapid development of highway construction . The degree of compaction of the roadbed and embankment highway construction and testing of the key indicators of the quality control , the current detection method is time-consuming , Stone Embankment rules to follow , the study is simple, rapid detection of the degree of compaction is the situation of road construction an urgent requirement . In this paper, two research projects on the basis of the summary and analysis of relevant outcomes Stone Embankment detection of transient Rayleigh wave method in the detection of the degree of compaction of the fill roadbed and other dynamic measurement methods . Through on-site detection and contrast of the sand replacement method , transient Rayleigh wave method to test the degree of compaction in the experimental section of the regression formula , further study of the the subgrade model under several forward algorithm for forward solving . In this paper, the study Dynamic Measurement of the applicability of the process , the proposed test frequency response function to identify the parameters , and then to establish the relationship between the new method and degree of compaction . The method of application of complex modal theory to consider the multi-degree-of-freedom model , without strict control of the excitation energy , operation and applicability . The article also through a set of experiments for filling foundation summarizes the parameter identification method and three other test method parameters and compaction state trends . Dynamic Measurement Stone Embankment by high filling Embankment indoor size model test results , the qualitative analysis of the changes in the relationship between the poor get the test parameters for the aforementioned dynamic testing method and settlement by the results compared with the irrigation method using the added mass method tests the regression formula . Applications added mass method and parameter identification method for testing in subsequent field testing , regression formula . Initially to verify the effectiveness of the two methods .

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CLC: > Transportation > Road transport > Road works > Roadbed, pavement engineering > Pavement Engineering
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