A method and device for detecting the compactness of bulk ballasted bed

A compactness detection and bulk technology, applied in the directions of roads, tracks, measuring instruments, etc., can solve the problems of low measurement accuracy and difficult implementation, and achieve the effect of improving measurement accuracy, easy implementation, and improving test work efficiency.

Active Publication Date: 2016-01-13
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides an on-site indoor dual-purpose detection method for the compactness of a bulk ballasted track bed, which is used for non-destructive testing of the compactness of a bulk ballasted track bed, so as to overcome the defects of low measurement accuracy and difficult implementation of existing measurement methods

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  • A method and device for detecting the compactness of bulk ballasted bed
  • A method and device for detecting the compactness of bulk ballasted bed
  • A method and device for detecting the compactness of bulk ballasted bed

Examples

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Effect test

Embodiment 1

[0038] Example 1: The compactness detection method of the bulk ballasted bed is used as an indoor test for the compactness of the ballasted bed. The test object is a newly built bulky ballasted bed in the laboratory. The material of the ballast is ordinary limestone graded ballast. Cyclic loading and compaction, the details are as follows:

[0039] By measuring the contact strength value between the protective plate at the bottom of the sleeper and the ballast within 5s, the contact strength value is collected every 0.1s, and the average value of each contact strength value is calculated to obtain the average value of the contact strength , to calculate the average contact intensity with specific measurements difference between ,pass Calculate the difference ratio , take the difference ratio The absolute value of ;The measured results are as follows: measurement time 5s, specific measurement value =45MPa, average contact strength =42.4MPa, =5.78%, 5%<5.78%...

Embodiment 2

[0055] Example 2: This bulk ballasted ballast bed density detection method, this method is used to monitor the compactness of the track bed of the outdoor on-site railway line, the test object is the ballasted track bed of the outdoor on-site railway line, the material of the ballast is ordinary granite graded track bed, after nearly one year of construction The repeated action of the trains in the year, the daily average of 20 passenger and freight trains are mixed, the specific content is as follows:

[0056] By measuring the contact strength value between the protective plate at the bottom of the sleeper and the ballast within 8s, the contact strength value is collected every 0.1s, and the average value of each contact strength value is calculated to obtain the average value of the contact strength , to calculate the average contact intensity with specific measurements difference between ,pass Calculate the difference ratio , take the difference ratio The abso...

Embodiment 3

[0073] Embodiment 3: This loose body has ballast bed compactness detection method, and this method is used as indoor test ballast bed compactness detection, and test object is that newly-built loose body has ballast bed in laboratory, and ballast material is ordinary granite rock gradation ballast, After completion, it has undergone 1 million cycles of indoor cyclic loading and compaction. The specific methods are as follows:

[0074]First place a pressure sensor under the ordinary sleeper. The pressure sensor and its circuit must be protected. By measuring the contact strength value between the bottom of the sleeper and the ballast within 10s, the contact strength value is collected every 0.1s, and the average value of each contact strength value is calculated. Contact Intensity Mean , to calculate the average contact intensity with specific measurements difference between ,pass Calculate the difference ratio , take the difference ratio The absolute value of ;T...

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Abstract

The invention discloses a method and a device for detecting the compactness of a loose ballasted bed, in particular to a new method and device for detecting the compactness of a ballasted bed, by measuring the change of the contact force between the contact plate at the bottom of the sleeper and the ballast The method for judging the compactness of a bulk ballast bed belongs to the technical field of railway engineering ballasted track bed detection; the invention is used in two environments in the field and indoors to solve the problem of measuring the compactness of a bulk ballasted track bed. The main functions that can be realized by the present invention include: detecting the compactness of the ballast bed without destroying the shape of the ballast bed; realizing real-time monitoring of dynamic compactness parameters of the ballasted ballast bed. The beneficial effects that can be realized by the present invention are as follows: the test structure is simple, it is convenient to arrange on the railway site, and it is convenient to operate, which can reduce manual auxiliary work, the test process is not restricted by external environmental factors, and the test work efficiency and accuracy are improved.

Description

technical field [0001] The invention relates to a method for detecting the compactness of a bulk ballasted ballast bed and a device for use, which is suitable for detecting the density of a new railway track bed and the compactness of an old line after tamping operations, and is used for judging the compactness of a ballast bed, belonging to railways Technical field of engineering track bed detection. Background technique [0002] The compactness of the ballast bed refers to the degree to which the particles are arranged and compacted with each other. It is defined as: compactness = volume of solid particles / total volume of granular structures (%). The compactness of the ballast bed is the main parameter to measure the working state and bearing capacity of the ballast bed, and to test the tamping quality of the road maintenance machinery. The traditional on-site measurement methods of compactness include sand filling method and water filling method. The irrigation method ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01B35/00
Inventor 王学军迟毅林
Owner KUNMING UNIV OF SCI & TECH
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