Car-mounted roadbed compactness rapid determinator

Abstract

The invention discloses a car-mounted roadbed compactness rapid determinator, comprising a detection apparatus and a trailer. The trailer comprises a vehicle frame, a wagon box and a running gear; the detection apparatus comprises a loading oil cylinder, a determination apparatus, an oil source, a power supply and a data processing unit; an upper end of the loading oil cylinder is arranged on the vehicle frame; the determination apparatus is arranged on a lower end of the loading oil cylinder; the loading oil cylinder is connected with the oil source; the oil source conveys pressure oil to the loading oil cylinder to load a detection pressure on the determination apparatus; a data output terminal of the determination apparatus is connected with the data processing unit; and the power supply provides power to power consumption equipment in the detection apparatus. The detection apparatus of the invention is arranged on the trailer to facilitate rapid movement and rapid detection of the compactness of a soil-stone mixed roadbed; and the equipment only needs to be drawn during working and is at low costs.

Description

[technical field] [0001] The invention relates to roadbed compactness test equipment, in particular to a vehicle-mounted rapid tester for roadbed compaction. [Background technique] [0002] With the extension of highway construction to mountainous areas, earth-rock mixed filling has the advantages of being able to use local materials, small post-construction settlement, and good economy, and has become a more common form of highway subgrade. In order to ensure the quality of earth-rock mixed subgrade filling, the control of compaction is one of the keys. At present, the commonly used detection methods for roadbed compactness can be roughly divided into three categories: water injection (sand) method, wave method and static penetration method. Although these methods have been widely used in general roadbed compaction detection, they will There are many limitations and deficiencies in their application to earth-rock mixed subgrades. First of all, although the water (sand) me...

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: (1) It is necessary to conduct a large number of large-scale compaction tests indoors in advance, and then conduct penetration tests indoors. Only after obtaining more statistical data can the relationship formula be established. If the statistical data is less, the relationship formula established There may be a large error

(2) This method does not take the full curve of force and displacement during the test process, but only uses the penetration load at a certain depth, and the favorable factors related to the degree of compaction in the middle process are ignored, which is relatively one-sided

(3) This method uses the empirical relationship established by statistical principles to indirectly determine the degree of subgrade compaction. For different soil-rock mixed subgrades, this relationship is more complicated. Even if this relationship is established, it often does not have universal adaptability. Therefore, , the accuracy of using this method to detect the compactness of soil-rock mixed subgrade is also difficult to meet the engineering requirements, and the actual effect needs to be tested

(4) The on-site compaction meter based on this method has not been further developed, so this method has not been popularized and applied in engineering

According to the current requirements of roadbed construction, the degree of compaction needs to be tested after the roadbed is compacted. It is time-consuming and labor-intensive to rely on traditional methods. At the same time, if the detection method relies on compaction equipment, the applicability will be greatly limited.

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