CN201548467U - Drop-hammer medium coarse grained soil subgrade compactness rapid tester - Google Patents
Drop-hammer medium coarse grained soil subgrade compactness rapid tester Download PDFInfo
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- CN201548467U CN201548467U CN200920245743XU CN200920245743U CN201548467U CN 201548467 U CN201548467 U CN 201548467U CN 200920245743X U CN200920245743X U CN 200920245743XU CN 200920245743 U CN200920245743 U CN 200920245743U CN 201548467 U CN201548467 U CN 201548467U
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- hammer
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- grained soil
- hammer stem
- coarse
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Abstract
The utility model discloses a drop-hammer medium coarse grained soil subgrade compactness rapid tester, which comprises an impacting device, an acceleration sensor and a frequency spectrum subgrade compactness rapid tester, wherein the acceleration sensor is used for detecting impact response in real time, and the frequency spectrum subgrade compactness rapid tester is connected with the acceleration sensor. The impacting device includes an impacting frame, a supporting frame, a horizontal upper bottom plate, a hammer lever, a hammer body and orienting devices, wherein the horizontal upper bottom plate is fixed onto the inner side of the impacting frame; the hammer lever vertically penetrating through the upper bottom plate from top to bottom is capable of freely moving up and down; the hammer body is installed at the bottom portion of the hammer lever; and the orienting devices are respectively arranged on the upper bottom plate or the inner wall of the upper portion of the impacting frame and the inner wall of the lower portion of the impacting frame and ensure the hammer lever to vertically move. Besides, a positioning device is arranged on the lower portion of the hammer lever; a temporary limiting device matching with the positioning device in use is installed on the upper bottom plate; and an opening-closing mechanism capable of realizing free dropping of the hammer body is installed on the limiting device. The drop-hammer medium coarse grained soil subgrade compactness rapid tester has the advantages of reasonable structural design, convenient installation, convenient operation when in use, convenient testing, high testing precision and capability of accurately and rapidly measuring medium coarse grained soil subgrade compactness.
Description
Technical field
The utility model belongs to Subgrade Compaction determination techniques field, especially relates to coarse-grained soil subgrade rapidly determining compaction degree instrument in a kind of drop hammer type.
Background technology
Subgrade Compaction is to weigh the important indicator of road construction quality, happens occasionally in China owing to Subgrade Compaction causes the example of road damage inadequately, causes tremendous economic loss and very bad social influence to countries and regions.
At present, the way of measuring Subgrade Compaction both at home and abroad can reduce three classes:
The first kind: classic core cutter method, sand replacement method and douche etc., usefulness is many at home, and these methods all need to dig pit, weigh and measured moisture content, and calculate its wet density, dry density and compactness.Said determination method measured moisture content in the open air extremely bothers, if burn with alcohol, every some about 0.5-1 of the time of delaying hour, as if in baking oven, toasting, 6-12 hour, thus time-consuming, take a lot of work and diminish roadbed because of digging pit.
Second class: gamma-rays method, this method be usefulness many abroad.But the dry density of this method fast measuring soil body, but because people to the feared state of mind and the Instrument measuring repeatability difference of ray and problem such as cost an arm and a leg, use not general in China.
The 3rd class: the new method that grows up the 1980s, this method is specific as follows: sensor is installed on the vibroll, utilize wheelmark, compacting counting, the variation of signal phase difference or certain vibration parameters waits measures compactness, thereby these are measured and must demarcate in advance, (what attention measured is the compactness scope to measure the scope of compactness with relatively method then, promptly be observational measurement), 2 mandatory declarations are arranged: (1) is because the complicacy of building-site environment and the water cut etc. of not considering the soil body, said method can not be drawn the concrete numerical value of compactness, it can only be observational measurement, want the quantitative measurement compactness, must consider the water cut of subgrade soils; (2) the vibration frequency control according to vibration wheel of road roller is very difficult, find out from the frequency spectrogram, little variation is arranged at any time, will cause the significant change of vibration acceleration and exciting force, because square relation that is directly proportional of acceleration or exciting force and frequency, this will influence the accuracy of compactness detection, this just with actual test process in, it is that the vibrating wheels vibration acceleration remains unchanged that the energy of wishing exciting remains unchanged, and that is to say that frequency and amplitude is constant to disagree.
Later 1990s (1997), Xian Road Communication Univ. has succeeded in developing Subgrade Compaction fast measuring instrument, this instrument is owing to used the S-G water frequency range that stagnates, do not measure the water cut of soil at the scene, just can quick, quantitative, the unabroken compactness that detects subgrade soils, survey any and only need 1-2 minute, the scene shows automatically, prints automatically, and is simple to operate.But it only is applicable to the fine grained soil roadbed, as plain soil padding, cushion lime, sand roadbed, and the centering coarse-grained soil subgrade, inapplicable to sand-gravel cushion.
The effective way of neither one is gone back in the detection that centering coarse-grained soil subgrade compactness is carried out at present, and core cutter method obviously can't use, sand replacement method; Though douche can use, the success ratio of digging pit is lower, runs into bigger stone hole and has just given up, even useless, because the not enough measuring accuracy of size in hole is very low, moisture measurement is difficulty very, and measuring error is big; A lot of local use " elevation difference methods " promptly utilize absolute altitude control compactness, but this only are a kind of superficial qualitatively measurements.
The utility model content
Technical problem to be solved in the utility model is at above-mentioned deficiency of the prior art, coarse-grained soil subgrade rapidly determining compaction degree instrument in a kind of drop hammer type is provided, its reasonable in design, easy for installation and use easy to operate, convenient test, measuring accuracy height can centering coarse-grained soil subgrade compactness be carried out accurately, measurement fast.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: coarse-grained soil subgrade rapidly determining compaction degree instrument in a kind of drop hammer type, comprise the percussion mechanism that tested roadbed is impacted, be installed on the described percussion mechanism and acceleration transducer that real-time impact response detects and the frequency spectrum formula Subgrade Compaction fast measuring instrument that joins with acceleration transducer, it is characterized in that: described percussion mechanism comprises the impact frame, be installed in the bracing frame that impacts on the frame and described impact frame is steadily supported, be fixed on the horizontal upper plate of described impact frame inboard, vertically pass the hammer stem that upper plate and energy easy on and off move from top to bottom, be installed in the hammer body of hammer stem bottom and be separately positioned on upper plate or described impact frame upper inside wall and the orienting device that impacts on the frame lower inner wall and the assurance hammer stem vertically moves; Acceleration transducer is installed in the positive top of hammer body, and hammer body is installed under the hammer stem and hammer stem, acceleration transducer and hammer body are positioned on the same vertical line; Described hammer stem bottom is provided with to be equipped with on locating device and the upper plate and is used with described locating device and hammer body promotes the back that puts in place hammer stem is carried out interim spacing stop means, is equipped with on the described stop means stop means is controlled to free stop means to the spacing of hammer stem and realize the open-and-close mechanism of hammer body free-falling.
Described hammer body bottom is lined with a vibration isolator.
Described orienting device comprises directive texture and following attitude reference device; The described directive texture of going up comprises and along the circumferential direction is fixed on a plurality of slides one on the upper plate and is installed in a plurality of pulleys one on described a plurality of slide one respectively, and described a plurality of pulley one surrounds the last slide opening that a confession hammer stem passes; Described down attitude reference device comprises along the circumferential direction being fixed on and impacts a plurality of slides two on the frame lower inner wall and be installed in a plurality of pulleys two on described a plurality of slide two respectively, and described a plurality of pulley two surrounds the following slide opening that a confession hammer stem passes; The described slide opening of going up is positioned on the same vertical line with following slide opening, and described a plurality of pulley one and vertical slideway that supplies the hammer stem easy on and off to move of a plurality of pulley two compositions.
The quantity of described slide one, pulley one, slide two and pulley two is three.
Described hammer body be shaped as cylindric and its bottom is provided with the hemispherical projective structure of protrusion, and the ratio of the height of hammer body and diameter is 1.2～2.
Described locating device is the coaxial hammer stem outside and the locating ring that increases gradually of external diameter from top to bottom of being arranged on, described stop means is made up of a plurality of position-limit mechanisms that are laid on the upper plate and along the circumferential direction be laid in hammer stem week side, and described position-limit mechanism comprises inside and outside two limiting stands of being installed on the upper plate, be installed on described inside and outside two limiting stands and the spacing slide bar of energy move left and right and be sleeved on slide bar spring on the spacing slide bar; Described open-and-close mechanism comprises that an end is fixed on driving lever on the spacing slide bar, the pull bar that is hinged with the driving lever other end can correspondingly drive the control lever that spacing slide bar outwards moves by pull bar and driving lever simultaneously with moving forward and backward and travel forward, and described control lever and pull bar are hinged and are fixed on the upper plate sidepiece by erecting frame; Described slide bar Spring Card is contained between driving lever and the outside limiting stand, and spacing slide bar leading section is set to corresponding with locating ring structure and outward-dipping gradually inclined-plane from top to bottom.
The quantity of described position-limit mechanism is that two and two position-limit mechanisms are symmetricly set on the hammer stem left and right sides.
Be lined with one deck vibration isolator between described acceleration transducer and the hammer body.
The described impact frame outside is equipped with the impact rack enclosure, and support frame as described above is fixed on the sidewall that impacts rack enclosure, and support frame as described above by be fixed on impact the triangular leg on the rack enclosure sidewall and be connected triangular leg with the impact rack enclosure between triangular draw bar form.
The utility model compared with prior art has the following advantages:
1, reasonable in design, easy for installation and use easy and simple to handle.
2, convenient test and measuring accuracy height can centering coarse-grained soil subgrade compactness carry out accurately, measure fast.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Description of drawings
Fig. 1 is an one-piece construction synoptic diagram of the present utility model.
Fig. 2 is the structural representation of the utility model stop means.
Fig. 3 is the user mode reference diagram of the utility model stop means and orienting device.
Fig. 4 is in the stop means structural representation of lifting state for the utility model hammer body.
Fig. 5 is in the stop means structural representation of falling state for the utility model hammer body.
Description of reference numerals:
The 1-hammer body; The 2-vibration isolator; The 3-acceleration transducer;
The 4-locating ring; The 5-hammer stem; The 6-slideway;
7-1-pulley one; 8-1-slide one; 7-2-pulley two;
8-2-slide two; The 9-triangular leg; The 10-triangular draw bar;
11-supporting leg seat; 12-impacts rack enclosure; The horizontal upper plate of 13-;
The 14-limiting stand; 15-slide bar spring; The spacing slide bar of 16-;
The 17-driving lever; The 18-pull bar; The 19-control lever;
The 20-button; The 21-control spring; 22-driving lever bearing pin;
23-hammer stem cap.
Embodiment
As Fig. 1, Fig. 2 and shown in Figure 3, the utility model comprises percussion mechanism that tested roadbed is impacted, be installed on the described percussion mechanism and the acceleration transducer 3 that detects of impact response and the frequency spectrum formula Subgrade Compaction fast measuring instrument that joins with acceleration transducer 3 in real time.Described percussion mechanism comprises and impacts frame, is installed in the bracing frame that impacts on the frame and described impact frame is steadily supported, is fixed on the horizontal upper plate 13 of described impact frame inboard, vertically passes upper plate 13 and the hammer stem 5 that can easy on and off moves from top to bottom, is installed in the hammer body 1 of hammer stem 5 bottoms and is separately positioned on upper plate 13 or described impact frame upper inside wall and impact on the frame lower inner wall and guarantee the orienting device that hammer stem 5 vertically moves; Acceleration transducer 3 is installed in the positive top of hammer body 1, and hammer body 1 is installed under the hammer stem 5 and hammer stem 5, acceleration transducer 3 and hammer body 1 are positioned on the same vertical line.Described hammer stem 5 bottoms are provided with to be equipped with on locating device and the upper plate 13 and are used with described locating device and hammer body 1 promotes the back that puts in place hammer stem 5 is carried out interim spacing stop means, are equipped with on the described stop means stop means is controlled to free stop means to the spacing of hammer stem 5 and realize the open-and-close mechanism of hammer body 1 free-falling.In the present embodiment, be lined with one deck vibration isolator 2 between described acceleration transducer 3 and the hammer body 1.Simultaneously, described hammer body 1 bottom is lined with a vibration isolator 2.
Described orienting device comprises directive texture and following attitude reference device; The described directive texture of going up comprises a plurality of slides one 8-1 that along the circumferential direction is fixed on the upper plate 13 and is installed in a plurality of pulleys one 7-1 on described a plurality of slide one 8-1 respectively, and described a plurality of pulley one 7-1 surrounds the last slide opening that a confession hammer stem 5 passes; Described down attitude reference device comprises along the circumferential direction being fixed on and impacts a plurality of slides two 8-2 on the frame lower inner wall and be installed in a plurality of pulley 7-2 on described a plurality of slide two 8-2 respectively, and described a plurality of pulley two 7-2 surround the following slide opening that a confession hammer stem 5 passes; The described slide opening of going up is positioned on the same vertical line with following slide opening, and described a plurality of pulley one 7-1 and vertical slideway 6 that supplies hammer stem 5 easy on and off to move of a plurality of pulley two 7-2 composition.
In the present embodiment, the quantity of described slide one 8-1, pulley one 7-1, slide two 8-2 and pulley two 7-2 is three.Described hammer body 1 be shaped as cylindric and its bottom is provided with the hemispherical projective structure of protrusion, and the ratio of the height of hammer body 1 and diameter is 1.2～2.
In conjunction with Fig. 4, Fig. 5, described locating device is coaxial hammer stem 5 outsides and the locating ring 4 that increases gradually of external diameter from top to bottom of being arranged on, described stop means is made up of a plurality of position-limit mechanisms that are laid on the upper plate 13 and along the circumferential direction be laid in hammer stem 5 all sides, and described position-limit mechanism comprises inside and outside two limiting stands 14 of being installed on the upper plate 13, be installed on described inside and outside two limiting stands 14 and spacing slide bar 16 that can move left and right and be sleeved on slide bar spring 15 on the spacing slide bar 16.Described open-and-close mechanism comprises that an end is fixed on driving lever 17 on the spacing slide bar 16, the pull bar 18 that is hinged with driving lever 17 other ends can correspondingly drive the control levers 19 that spacing slide bar 16 outwards moves by pull bar 18 and driving lever 17 simultaneously with moving forward and backward and travel forward, and described control lever 19 is hinged with pull bar 18 and is fixed on upper plate 13 sidepieces by erecting frame; Described slide bar spring 15 is installed between driving lever 17 and the outside limiting stand 14, and spacing slide bar 16 leading sections are set to corresponding with locating ring 4 structures and outward-dipping gradually inclined-plane from top to bottom.In the present embodiment, the quantity of described position-limit mechanism is that two and two position-limit mechanisms are symmetricly set on hammer stem 5 left and right sides.
The described impact frame outside is equipped with impacts rack enclosure 12, support frame as described above is fixed on the sidewall that impacts rack enclosure 12, and support frame as described above impacts the triangular leg 9 on rack enclosure 12 sidewalls and is connected triangular leg 9 and the triangular draw bar 10 of 12 of impact rack enclosures is formed by being fixed on.Described triangular leg 9 bottoms are equipped with supporting leg seat 11.
Described hammer stem 5 tops are equipped with the convenient hammer stem cap 23 that promotes usefulness, are set with control spring 21 on the control lever 19 and control lever 19 rearward end are equipped with button 20.Described driving lever 17 is installed on the upper plate 13 by the driving lever bearing pin of installing in the middle 22.
The above; it only is preferred embodiment of the present utility model; be not that the utility model is imposed any restrictions; everyly any simple modification that above embodiment did, change and equivalent structure are changed, all still belong in the protection domain of technical solutions of the utility model according to the utility model technical spirit.
Claims (9)
1. coarse-grained soil subgrade rapidly determining compaction degree instrument in the drop hammer type, comprise the percussion mechanism that tested roadbed is impacted, be installed on the described percussion mechanism and acceleration transducer (3) that real-time impact response detects and the frequency spectrum formula Subgrade Compaction fast measuring instrument that joins with acceleration transducer (3), it is characterized in that: described percussion mechanism comprises the impact frame, be installed in the bracing frame that impacts on the frame and described impact frame is steadily supported, be fixed on the horizontal upper plate (13) of described impact frame inboard, vertically pass the hammer stem (5) that upper plate (13) and energy easy on and off move from top to bottom, be installed in the hammer body (1) of hammer stem (5) bottom and be separately positioned on upper plate (13) or described impact frame upper inside wall and the orienting device that impacts on the frame lower inner wall and assurance hammer stem (5) vertically moves; Acceleration transducer (3) is installed in the positive top of hammer body (1), and hammer body (1) is installed under the hammer stem (5) and hammer stem (5), acceleration transducer (3) and hammer body (1) are positioned on the same vertical line; Described hammer stem (5) bottom is provided with to be equipped with on locating device and the upper plate (13) and is used with described locating device and hammer body (1) promotes the back that puts in place hammer stem (5) is carried out interim spacing stop means, is equipped with on the described stop means stop means is controlled to free stop means to the spacing of hammer stem (5) and realize the open-and-close mechanism of hammer body (1) free-falling.
2. according to coarse-grained soil subgrade rapidly determining compaction degree instrument in the described drop hammer type of claim 1, it is characterized in that: described hammer body (1) bottom is lined with a vibration isolator (2).
3. according to coarse-grained soil subgrade rapidly determining compaction degree instrument in claim 1 or the 2 described drop hammer types, it is characterized in that: described orienting device comprises directive texture and following attitude reference device; The described directive texture of going up comprises a plurality of slides one (8-1) that along the circumferential direction are fixed on the upper plate (13) and is installed in a plurality of pulleys one (7-1) on described a plurality of slide one (8-1) respectively, and described a plurality of pulley one (7-1) surrounds the last slide opening that a confession hammer stem (5) passes; Described down attitude reference device comprises along the circumferential direction being fixed on and impacts a plurality of slides two (8-2) on the frame lower inner wall and be installed in a plurality of pulleys two (7-2) on described a plurality of slide two (8-2) respectively, and described a plurality of pulley two (7-2) surrounds the following slide opening that a confession hammer stem (5) passes; The described slide opening of going up is positioned on the same vertical line with following slide opening, and described a plurality of pulley one (7-1) and vertical slideway (6) that supplies hammer stem (5) easy on and off to move of a plurality of pulley two (7-2) composition.
4. according to coarse-grained soil subgrade rapidly determining compaction degree instrument in the described drop hammer type of claim 3, it is characterized in that: the quantity of described slide one (8-1), pulley one (7-1), slide two (8-2) and pulley two (7-2) is three.
5. according to coarse-grained soil subgrade rapidly determining compaction degree instrument in claim 1 or the 2 described drop hammer types, it is characterized in that: described hammer body (1) be shaped as cylindric and its bottom is provided with the hemispherical projective structure of protrusion, and the ratio of the height of hammer body (1) and diameter is 1.2～2.
6. according to coarse-grained soil subgrade rapidly determining compaction degree instrument in claim 1 or the 2 described drop hammer types, it is characterized in that: described locating device is coaxial hammer stem (5) outside and the locating ring (4) that increases gradually of external diameter from top to bottom of being arranged on, described stop means is gone up and along the circumferential direction is laid in a plurality of position-limit mechanisms of all sides of hammer stem (5) and form by being laid in upper plate (13), and described position-limit mechanism comprises inside and outside two limiting stands (14) that are installed on the upper plate (13), the spacing slide bar (16) that is installed in that described inside and outside two limiting stands (14) are gone up and can move left and right and be sleeved on slide bar spring (15) on the spacing slide bar (16); Described open-and-close mechanism comprises that an end is fixed on driving lever (17) on the spacing slide bar (16), the pull bar (18) that is hinged with driving lever (17) other end and can move forward and backward and travel forward and can correspondingly drive the outside mobile control lever (19) of spacing slide bar (16) by pull bar (18) and driving lever (17) simultaneously, and described control lever (19) and pull bar (18) are hinged and are fixed on upper plate (13) sidepiece by erecting frame; Described slide bar spring (15) is installed between driving lever (17) and the outside limiting stand (14), and spacing slide bar (16) leading section is set to and the corresponding and outward-dipping gradually from top to bottom inclined-plane of locating ring (4) structure.
7. according to coarse-grained soil subgrade rapidly determining compaction degree instrument in the described drop hammer type of claim 6, it is characterized in that: the quantity of described position-limit mechanism is that two and two position-limit mechanisms are symmetricly set on hammer stem (5) left and right sides.
8. according to coarse-grained soil subgrade rapidly determining compaction degree instrument in claim 1 or the 2 described drop hammer types, it is characterized in that: be lined with one deck vibration isolator between described acceleration transducer (3) and the hammer body (1).
9. according to coarse-grained soil subgrade rapidly determining compaction degree instrument in claim 1 or the 2 described drop hammer types, it is characterized in that: the described impact frame outside is equipped with impacts rack enclosure (12), support frame as described above is fixed on the sidewall that impacts rack enclosure (12), and support frame as described above by be fixed on impact the triangular leg (9) on rack enclosure (12) sidewall and be connected triangular leg (9) and impact rack enclosure (12) between triangular draw bar (10) form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920245743XU CN201548467U (en) | 2009-12-11 | 2009-12-11 | Drop-hammer medium coarse grained soil subgrade compactness rapid tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920245743XU CN201548467U (en) | 2009-12-11 | 2009-12-11 | Drop-hammer medium coarse grained soil subgrade compactness rapid tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201548467U true CN201548467U (en) | 2010-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920245743XU Expired - Fee Related CN201548467U (en) | 2009-12-11 | 2009-12-11 | Drop-hammer medium coarse grained soil subgrade compactness rapid tester |
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| CN (1) | CN201548467U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607970A (en) * | 2012-03-28 | 2012-07-25 | 上汽通用五菱汽车股份有限公司 | Device for taking impact test of freely falling body |
| CN103091183A (en) * | 2013-01-18 | 2013-05-08 | 中电投工程研究检测评定中心 | Waterproof layer low-temperature performance detection device |
| CN105155501A (en) * | 2015-08-21 | 2015-12-16 | 中南大学 | Handheld type roadbed bevel compactness measuring instrument |
| CN108867604A (en) * | 2018-04-04 | 2018-11-23 | 中交第三公路工程局有限公司 | A kind of gangue Subgrade Compaction detection method and detection device |
-
2009
- 2009-12-11 CN CN200920245743XU patent/CN201548467U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607970A (en) * | 2012-03-28 | 2012-07-25 | 上汽通用五菱汽车股份有限公司 | Device for taking impact test of freely falling body |
| CN102607970B (en) * | 2012-03-28 | 2014-12-10 | 上汽通用五菱汽车股份有限公司 | Device for taking impact test of freely falling body |
| CN103091183A (en) * | 2013-01-18 | 2013-05-08 | 中电投工程研究检测评定中心 | Waterproof layer low-temperature performance detection device |
| CN103091183B (en) * | 2013-01-18 | 2015-03-11 | 中电投工程研究检测评定中心 | Waterproof layer low-temperature performance detection device |
| CN105155501A (en) * | 2015-08-21 | 2015-12-16 | 中南大学 | Handheld type roadbed bevel compactness measuring instrument |
| CN108867604A (en) * | 2018-04-04 | 2018-11-23 | 中交第三公路工程局有限公司 | A kind of gangue Subgrade Compaction detection method and detection device |
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| C17 | Cessation of patent right | ||
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Granted publication date: 20100811 Termination date: 20111211 |