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Method for detecting compaction degree of powder soil roadbed

A detection method and technology for soil subgrade, applied in the direction of roads, roads, road repair, etc., can solve the problems of the overall damage of the subgrade, the time-consuming and laborious detection process, the inability to display the compaction status in real time, etc., achieving good comprehensiveness and high difficulty in counterfeiting Effect

Inactive Publication Date: 2019-11-01
廊坊市交通公路工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the existing technology, when testing the compactness of silty soil subgrade, manual random inspection is generally used. The current inspection frequency required by the standard is to inspect at least 2 points per 1000 square meters. The detection points of this detection method are limited, and the detection results cannot fully reflect The real compaction state of the subgrade as a whole may cause pressure leakage. On the other hand, the existing detection methods are hysteresis and cannot display the current compaction status in real time. Falsification, in addition, the detection operation will cause damage to the integrity of the subgrade

Method used

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  • Method for detecting compaction degree of powder soil roadbed
  • Method for detecting compaction degree of powder soil roadbed
  • Method for detecting compaction degree of powder soil roadbed

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In this example, a section of 3 meters long non-rolled silty soil subgrade is rolled for the first time, and the scheme of the present invention is used to detect during the rolling process. The process is as follows:

[0025] The silty soil subgrade is sampled, and the composition of the sample is detected (the sieving experiment is carried out according to "Highway Soil Test Regulations" JTG E40-2007; note: the means for detecting the content of fine particles in the subgrade soil is an existing technology, and during specific implementation, As long as the accuracy of the detection results can be ensured, those skilled in the art can select suitable detection means according to actual conditions), and obtain a content of 63.3% of fine particles with a particle diameter less than 0.075mm, i.e. h x = 63.3%;

[0026] The vibratory roller adopts Xugong XS223J type vibratory roller, the acceleration sensor adopts the 1A113E piezoelectric acceleration sensor, the sampling ...

Embodiment 2

[0030] Carry out the second round of rolling on the basis of Example 1. The action of the vibratory roller and the sampling conditions of the acceleration sensor are the same as in Example 1. After the rolling is completed, the compaction degree is detected at different positions in the rolling area by using the sand filling method. ; After processing the data, there is the following table:

[0031]

[0032] As can be seen from the above table, the test result of the present invention is very close to the test result of the sand filling method. In conjunction with the test result of Example 1, it is shown that the deviation between the test result of the present invention and the test result of the sand filling method is small, and the accuracy of the present invention Better and more practical.

example 3

[0034] Different from examples 1 and 2, in this example, a 3-meter-long area is selected for detection on a silty soil subgrade that has been rolled, and the design compaction degree of the silty soil subgrade is ≥95%;

[0035] During detection, the action of the vibratory roller and the sampling conditions of the acceleration sensor are the same as in Example 1. After the rolling is completed, the compaction degree is detected at different positions in the rolling area by the sand filling method; after the data is processed, the following table :

[0036]

[0037] It can be seen from the above table that the subgrade compaction in the range of 1.5-2.0 meters, 2.0-2.5 meters, and 2.5-3.0 meters is unqualified, which is consistent with the detection conclusion of the sand filling method.

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Abstract

The invention discloses a method for detecting a compaction degree of a powder soil roadbed. According to the method, the compaction degree of the powder soil roadbed can be calculated in real time according to the following formula in the rolling operation process of a vibrating road roller (Please see the formula in the specification). The method has the beneficial effects that the method for detecting the compaction degree of the powder soil roadbed is provided to achieve real-time and covering type detection under the condition that the integrity of the roadbed is not damaged, the detection comprehensiveness is good, the influence made by human factors is small, and the counterfeiting difficulty is high.

Description

technical field [0001] The invention relates to a technology for detecting the degree of compaction of a roadbed, in particular to a method for detecting the degree of compaction of a silty soil roadbed. Background technique [0002] In the existing technology, when testing the compactness of silty soil subgrade, manual random inspection is generally used. The current inspection frequency required by the standard is to inspect at least 2 points per 1000 square meters. The detection points of this detection method are limited, and the detection results cannot fully reflect The real compaction state of the subgrade as a whole may cause pressure leakage. On the other hand, the existing detection methods are hysteresis and cannot display the current compaction status in real time. Falsification, in addition, detection operations can cause damage to the integrity of the subgrade. Contents of the invention [0003] Aiming at the problems in the background technology, the presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C19/28
CPCE01C19/288
Inventor 邱建波杜国强李迎民刘刚武彦龙蔡轩秦家禄李志勇张荣华方元陈永松付少辉韩洪波蔡绍芳侯亮朝杨超王晓东李涛史俊芳安建霞秦利菊胡赛赛
Owner 廊坊市交通公路工程有限公司
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