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Road foundation compactness detection method

A detection method and a technology of compaction degree, which are applied in the field of foundation soil survey, infrastructure engineering, construction, etc., can solve the problems of large subgrade damage, small scope of application, and digging large exploratory pits, etc., so as to achieve little impact on the progress of the project , The effect of human factors is small, and the detection error is small

Inactive Publication Date: 2016-01-06
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantages of the above-mentioned tests are small scope of application, high cost, heavy workload, slow speed, long cycle, and great damage to the existing roadbed.
Especially when testing the filling quality of the deep layer of the roadbed, it is necessary to dig a large exploratory pit, which will cause new hidden dangers in the roadbed

Method used

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  • Road foundation compactness detection method
  • Road foundation compactness detection method
  • Road foundation compactness detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] K=-4.48×10 -3 x 2 +0.76x+70.82

Embodiment 2

[0055] K=-1.484×10 -7 x 4 +1.963×10 -4 x 3 -0.0366X 2 +2.377X+46.68

Embodiment 3

[0057] K=307.6sin(0.0093X-0.2423)+128.3sin(0.02143X+1.839)

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Abstract

The invention discloses a road foundation compactness detection method. According to the method, comparative analysis is conducted through on-site light dynamic penetration tests and other tests for detecting the road foundation compactness, and a corresponding relation of the light dynamic penetration hammering number and the compactness is built; and then the large-area road foundation filling compactness is comprehensively detected through the light dynamic penetration method, the light dynamic penetration hammering number of each detection point is measured, and the road foundation compactness of each detection point is calculated according to the built corresponding relation of the light dynamic penetration hammering number and the compactness. By means of the method, road foundation compactness detection work becomes easier, more convenient and quicker, the detection cycle is short, cost is low, damage to a filled road foundation is little during detection, and the application range is wide.

Description

【Technical field】 [0001] The invention relates to the technical field of roadbed compaction detection, in particular to a roadbed compaction detection method. 【Background technique】 [0002] The subgrade filled with soil-rock mixture has the advantages of good compaction effect, small settlement, good water permeability, high impact resistance, high strength, and convenient material extraction, and is widely used in road construction at home and abroad. [0003] The degree of compaction is one of the key indicators for the quality inspection of subgrade and pavement construction. It characterizes the compactness after on-site compaction. The standard density (maximum dry density) and water content obtained from the indoor test are the benchmark values ​​for the evaluation of the degree of compaction, which directly determines the the reliability of the assessment results. The on-site detection methods of compaction mainly include sand filling method, ring knife method, wate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D1/00
Inventor 周志军张兴明王端端张利鹏高文静杨兴振
Owner CHANGAN UNIV
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