CN210923707U - Road surface base course cement stabilized macadam compactness detection device - Google Patents
Road surface base course cement stabilized macadam compactness detection device Download PDFInfo
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- CN210923707U CN210923707U CN201921585606.0U CN201921585606U CN210923707U CN 210923707 U CN210923707 U CN 210923707U CN 201921585606 U CN201921585606 U CN 201921585606U CN 210923707 U CN210923707 U CN 210923707U
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Abstract
The utility model discloses a road surface base course cement stabilization rubble compactness detection device, including "E" type frame, air level and adjusting screw, "E" type frame comprises roof, middle splint, bottom plate and side connecting plate, and the other end fixedly connected with stand pipe of middle splint is provided with force sensor on the bottom surface of roof, is connected with the spring below force sensor, is connected with the pressure-bearing pipe below the spring, is provided with the connecting block at the tail end of pressure-bearing pipe, is fixedly connected with the bearing head in the bottom surface of connecting block; the air level is arranged on the upper portion of the bottom plate, and adjusting screws are arranged on the periphery of the bottom plate. The utility model discloses it is fast to detect, does not consume standard sand, reduces manual fit, avoids extravagant because of the machinery that the superpressure produced, detects the frequency through the increase, can inspect the homogeneity of this lamination real quality, in time provides the decision-making foundation for the optimization of compaction technology and the adjustment of scheme.
Description
The technical field is as follows:
the utility model relates to a measuring device of road surface basic unit degree of compaction, in particular to road surface basic unit cement stabilized macadam degree of compaction detection device.
Secondly, background art:
the cement stabilized macadam structure layer is a main component of a pavement structure, plays a role in bearing and transferring upper load, and is widely applied due to the characteristics of convenience in material obtaining, low manufacturing cost, high strength, high construction speed, good stability, good scouring resistance and the like. The construction quality of the layer determines the overall service performance and durability of the pavement, and the construction quality is evaluated through the compactness, so the detection of the compactness is very important for controlling the construction quality of the water-stable gravel layer. The traditional method for detecting the compactness of the cement stabilized macadam structure layer adopts a sand filling method, and comprises the following steps: and (3) carrying out compaction tests on the cement-stabilized macadam mixture under different water content conditions by using a heavy compaction instrument indoors, calculating the maximum dry density and the optimal water content of the cement-stabilized macadam mixture by using a compaction curve, and taking the maximum dry density as the standard dry density. And (4) screening, drying and temperature-humidity balance processing are carried out on the standard sand, and the density of the standard sand is calibrated. Selecting a test position, carrying out rough surface analysis, leveling and digging pits, pouring standard sand, weighing wet materials, weighing sand, taking water content, calculating and calculating the volume of a test pit, wet density and calculating actual measurement dry density. Its degree of compaction K = calculated measured dry density/standard dry density x 100%.
The test method has the defects of multiple intermediate links, easiness in generating errors and misoperation, consumption of a certain amount of standard sand, multiple auxiliary tests, long test time, easiness in being influenced by external weather conditions, difficulty in guiding construction in time, easiness in leaving potential quality hazards and the like in the test process.
Thirdly, the contents of the utility model:
the utility model discloses the technical problem that will solve is: the device has the advantages of overcoming the defects of the prior art, being high in detection speed, few in intermediate links, small in error, capable of effectively controlling the quality of a compaction layer, reasonably controlling the compaction times and avoiding mechanical waste caused by overpressure.
The utility model discloses a technical scheme who solves technical problem and take is:
a pavement base cement stabilized macadam compactness detection device comprises an E-shaped frame, a level bubble and an adjusting screw, wherein the E-shaped frame is composed of a top plate, a middle clamping plate, a bottom plate and a side connecting plate, the top plate, the middle clamping plate and the bottom plate are respectively distributed in an up-and-down parallel manner, and one end of the top plate, one end of the middle clamping plate and one end of the bottom plate are respectively and vertically connected with the inner wall of the side connecting plate; the other end of the middle clamping plate is fixedly connected with a guide pipe, a tension sensor is arranged on the bottom surface of the top plate, a matched display screen is connected onto the tension sensor, a spring is connected below the tension sensor, a pressure-bearing pipe is connected below the spring, and the pressure-bearing pipe penetrates into the guide pipe; the tail end of the pressure-bearing pipe is provided with a connecting block, and the bottom surface of the connecting block is fixedly connected with a pressure-bearing head; the air level is arranged on the upper portion of the bottom plate, and the number of the adjusting screws is four, and the four adjusting screws are respectively arranged on the periphery of the bottom plate.
The bottom plate is provided with a through hole at a position corresponding to the upper pressure-bearing head, the through hole is of a circular cross section, and the cross section of the through hole is larger than that of the pressure-bearing head.
A pressure lever penetrates through the middle upper part of the pressure bearing pipe, and one end of the pressure lever is hinged with the inner wall of the side connecting plate of the E-shaped frame; and the outer surface of the pressure bearing pipe is provided with a scale with scales.
The inside of the guide pipe is distributed in a hollow shape.
The utility model discloses an actively beneficial effect is:
1. the utility model discloses it is fast to detect, do not consume standard sand, it is little influenced by external climate condition, reduce manual fit, the intermediate link is few, the error is little, the result is directly perceived, in step with the construction, possible in time guide the construction, do not produce destruction to the detection layer, save time, the manpower, in time reflect the compactness result, control compaction layer quality effectively, the rational control compaction pass number, avoid the mechanical waste because of the superpressure produces, through increasing detection frequency, can inspect the homogeneity of this lamination compactness, in time, the adjustment of the optimization and the scheme for compaction technology provides the decision-making foundation.
2. The utility model discloses during the use, roll the construction site cement stabilized macadam and accomplish the back, select the test position, clean, the flattening surface, utilize air level and leveling screw on the device bottom plate to carry out the leveling to the device, press down along with the depression bar, the bearing head slowly gets into cement stabilized macadam layer through the perforation on the bottom plate, the penetration resistance value (KN) when survey injection amount is 50mm, be actual measurement injection resistance value promptly, at this moment, utilize compactedness K = actual measurement injection amount resistance (KN)/standard injection amount resistance (KN) x100%, can solve the compactedness of this point.
Fourthly, explanation of the attached drawings:
fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of the "E" type frame of the present invention.
The fifth embodiment is as follows:
the invention will be further explained and explained with reference to the drawings, in which:
referring to fig. 1-2, a pavement base cement stabilized macadam compactness detection device comprises an 'E' shaped frame, a leveling bubble 12 and an adjusting screw 13, wherein the 'E' shaped frame is composed of a top plate 1, a middle clamping plate 2, a bottom plate 3 and a side connecting plate 4, the top plate 1, the middle clamping plate 2 and the bottom plate 3 are respectively distributed in an up-and-down parallel manner, and one end of the top plate 1, one end of the middle clamping plate 2 and one end of the bottom plate 3 are respectively vertically connected with the inner wall of the side connecting plate 4; the other end of the middle clamping plate 2 is fixedly connected with a guide pipe 5, a tension sensor 6 is arranged on the bottom surface of the top plate 1, a matched display screen 6-1 is connected onto the tension sensor 6, a spring 7 is connected below the tension sensor 6, a pressure bearing pipe 8 is connected below the spring 7, and the pressure bearing pipe 8 penetrates into the guide pipe 5; the tail end of the pressure-bearing pipe 8 is provided with a connecting block 9, and the bottom surface of the connecting block 9 is fixedly connected with a pressure-bearing head 10; the leveling bubbles 11 are arranged at the upper part of the bottom plate 3, and four adjusting screws 12 are respectively arranged at the periphery of the bottom plate 3; a through hole 3-1 is arranged on the bottom plate 3 at a position corresponding to the upper pressure bearing head 10, the through hole 3-1 is of a circular cross section, and the cross section of the through hole 3-1 is larger than that of the pressure bearing head 10; a pressure lever 13 penetrates through the middle upper part of the pressure bearing pipe 8, and one end of the pressure lever 13 is hinged with the inner wall of the side connecting plate 4 of the E-shaped frame; the outer surface of the pressure bearing pipe 8 is provided with a scale 8-1 with scales; the guide tube 5 is distributed in a hollow shape.
The principle of the device is as follows: the compacted cement-stabilized rubble layer consists of aggregates, water and gaps among the aggregates, the volume of the compacted cement-stabilized rubble layer is fixed and unchanged in the compression process due to the incompressibility of the aggregates and the water, the compressibility of the cement-stabilized rubble layer is determined by the gaps among the aggregates, the void ratio is closely related to the compaction quality of the water-stabilized layer, the larger the gaps among the aggregates are, the looser the water-stabilized rubble layer is, the smaller the compactness of the water-stabilized layer is, and the smaller the penetration resistance value is; the smaller the gap between the aggregates is, the denser the water-stable gravel layer is, and the larger the density is, the larger the penetration resistance value is.
The size of penetrating resistance value is by the closely knit degree two factors decision of penetration depth and cement stabilization gravel layer, and when the penetration depth was fixed, the penetration resistance became positive correlation with the closely knit degree on water stabilization gravel layer, all penetrated 50mm with the pressure-bearing head during the test and regarded as the control penetration volume, and the penetration resistance value was confirmed by the closely knit degree on cement stabilization gravel layer this moment.
The test steps are as follows: a heavy compaction standard test piece of the cement stabilized macadam mixture is firstly manufactured indoors under the conditions of maximum dry density and optimal water content, and then the penetration resistance value with the penetration of 50mm is measured on the standard test piece by using the device and is used as the standard penetration resistance (KN).
The detection method of the on-site compactness comprises the following steps: after the cement stabilized macadam is rolled and rolled on a construction site, selecting a test position, cleaning and leveling the surface, leveling the device by using a level bubble and a leveling screw on a bottom plate of the device, and measuring a penetration resistance value (KN) when the penetration amount is 50mm, namely the measured penetration resistance value, wherein the compaction degree of the point can be obtained by using the compaction degree K = measured penetration resistance value (KN)/standard penetration resistance value (KN) x 100%; during the use, press down along with the depression bar, the pressure-bearing head slowly gets into cement and stabilizes the metalling, and the penetration resistance increases gradually, and the penetration counter-force increases gradually, penetrates certain degree of depth, and when the pressure-bearing head atress reached mechanics balance, the display value was measured penetration resistance value promptly, can carry out the calculation of compactness according to above-mentioned formula.
The utility model discloses it is fast to detect, do not consume standard sand, it is little influenced by external climate condition, reduce manual fit, the intermediate link is few, the error is little, the result is directly perceived, in step with the construction, possible in time guide the construction, do not produce destruction to the detection layer, save time, the manpower, in time reflect the compactness result, control compaction layer quality effectively, the rational control compaction pass number, avoid the mechanical waste because of the superpressure produces, through increasing detection frequency, can inspect the homogeneity of this lamination compactness, in time, the adjustment of the optimization and the scheme for compaction technology provides the decision-making foundation.
Claims (4)
1. The utility model provides a rubble compactness detection device is stabilized to road surface basic unit cement, includes "E" type frame, air level and adjusting screw, its characterized in that: the E-shaped frame is composed of a top plate (1), a middle clamping plate (2), a bottom plate (3) and a side connecting plate (4), the top plate (1), the middle clamping plate (2) and the bottom plate (3) are respectively distributed in an up-down parallel mode, and one end of the top plate (1), one end of the middle clamping plate (2) and one end of the bottom plate (3) are respectively vertically connected with the inner wall of the side connecting plate (4); the other end of the middle clamping plate (2) is fixedly connected with a guide pipe (5), a tension sensor (6) is arranged on the bottom surface of the top plate (1), a matched display screen (6-1) is connected onto the tension sensor (6), a spring (7) is connected below the tension sensor (6), a pressure bearing pipe (8) is connected below the spring (7), and the pressure bearing pipe (8) penetrates into the guide pipe (5); a connecting block (9) is arranged at the tail end of the pressure-bearing pipe (8), and a pressure-bearing head (10) is fixedly connected to the bottom surface of the connecting block (9); the leveling bubble (11) is arranged on the upper portion of the bottom plate (3), and the number of the adjusting screws (12) is four, and the four adjusting screws are respectively arranged on the periphery of the bottom plate (3).
2. The device for detecting the compactness of cement stabilized macadam for a road surface base according to claim 1, characterized in that: the pressure-bearing device is characterized in that a through hole (3-1) is formed in the position, corresponding to the upper pressure-bearing head (10), of the bottom plate (3), the through hole (3-1) is of a circular cross section, and the cross section of the through hole (3-1) is larger than that of the pressure-bearing head (10).
3. The device for detecting the compactness of cement stabilized macadam for a road surface base according to claim 1, characterized in that: a pressure lever (13) penetrates through the middle upper part of the pressure bearing pipe (8), and one end of the pressure lever (13) is hinged with the inner wall of the side connecting plate (4) of the E-shaped frame; the outer surface of the pressure bearing pipe (8) is provided with a scale (8-1) with scales.
4. The device for detecting the compactness of cement stabilized macadam for a road surface base according to claim 1, characterized in that: the guide pipe (5) is distributed in a hollow shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921585606.0U CN210923707U (en) | 2019-09-23 | 2019-09-23 | Road surface base course cement stabilized macadam compactness detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921585606.0U CN210923707U (en) | 2019-09-23 | 2019-09-23 | Road surface base course cement stabilized macadam compactness detection device |
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| CN210923707U true CN210923707U (en) | 2020-07-03 |
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| CN201921585606.0U Active CN210923707U (en) | 2019-09-23 | 2019-09-23 | Road surface base course cement stabilized macadam compactness detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114383973A (en) * | 2021-12-09 | 2022-04-22 | 中路交科检测技术有限公司 | Method for testing full-thickness paving compactness of cement stabilized base |
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2019
- 2019-09-23 CN CN201921585606.0U patent/CN210923707U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114383973A (en) * | 2021-12-09 | 2022-04-22 | 中路交科检测技术有限公司 | Method for testing full-thickness paving compactness of cement stabilized base |
| CN114383973B (en) * | 2021-12-09 | 2023-09-19 | 中路交科检测技术有限公司 | Test method for full-thickness paving compactness of water-stable base layer |
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