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Compactness test method and compactness tester based on the same

A test method and technology of compaction degree, which are applied in basic structure engineering, basic structure testing, generation of ultrasonic/sonic/infrasonic waves, etc., can solve problems such as uneven water content and large change in filler particle size, and achieve simple operation, Fast processing and wide-ranging effects

Inactive Publication Date: 2009-02-18
CHONGQING JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For soil-rock mixed subgrades, due to the large variation in particle size and uneven water content of the filler, the existing compaction test methods are quite limited.

Method used

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  • Compactness test method and compactness tester based on the same
  • Compactness test method and compactness tester based on the same
  • Compactness test method and compactness tester based on the same

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Embodiment Construction

[0037] The invention originates from the key traffic project of Chongqing City "Research on Rapid Fluctuation Detection Technology of Highway Soil-rock Mixed Subgrade Compaction". In the subject research, the project team established a correlation model between the physical and mechanical parameters of the rock-soil composite medium and the elastic wave propagation parameters by studying the wave propagation characteristics of the soil-rock composite medium, so as to invert the rock-soil composite medium through the elastic wave testing technology The parameters of the soil composite medium, on this basis, developed a practical technology for the detection of fluctuations in the degree of foundation compaction; in order to further promote and apply the fluctuation test technology, and finally establish a standard for the detection and evaluation of the degree of foundation compaction, the project team successfully developed the compaction degree for the first time. Solidity det...

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PUM

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Abstract

The invention discloses a compaction degree test method, which comprises the following steps: (1) field data collection, (2) data processing and analysis, (3) S-wave velocity calculation under the most dense state, (4) water content calculation under the most dense state, and (5) compaction degree calculation; the invention also discloses a compaction degree tester based on the method; the compaction degree tester comprises a single-chip controller, a floating-point amplifying and sampling holding A / D converter, a high / low pass filter, a wave-trap, a preamp A / D converter, an on-site wiring checker, a data storage and a computer; the invention has the advantages that the apparatus is portable and power-saving, and has compact structure, easy operation, fast processing speed and wide application range.

Description

technical field [0001] The invention relates to a roadbed compaction test technology, in particular to a compaction test method and a compaction tester based on the method. Background technique [0002] In recent years, with the rapid development of expressways in the west, in the construction of expressways in mountainous and hilly areas, a large amount of earth-rock mixed filling roadbed filling is often encountered. The compaction quality of this earth-rock mixed filling is good or bad. It will directly affect the settlement deformation and stability of the subgrade, so the compaction degree of the filled subgrade must be strictly controlled during the construction process. The traditional methods for testing the compactness of highway subgrades in my country include sand filling method, nuclear test method, and ring knife method. For soil-rock mixed subgrades, due to the large variation in particle size and uneven water content of the filler, the existing compaction tes...

Claims

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Application Information

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IPC IPC(8): G01N29/34E02D33/00G01N33/42
Inventor 赵明阶黄卫东周寅伦李建王振国李勇王桂梅丁茂林军志蒙红
Owner CHONGQING JIAOTONG UNIVERSITY
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