CN105155501A - Handheld type roadbed bevel compactness measuring instrument - Google Patents
Handheld type roadbed bevel compactness measuring instrument Download PDFInfo
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- CN105155501A CN105155501A CN201510516522.1A CN201510516522A CN105155501A CN 105155501 A CN105155501 A CN 105155501A CN 201510516522 A CN201510516522 A CN 201510516522A CN 105155501 A CN105155501 A CN 105155501A
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- measuring instrument
- roadbed
- montant
- bevel
- vertical rod
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Abstract
The invention discloses a handheld type roadbed bevel compactness measuring instrument. The measuring instrument comprises a vertical rod; an electromagnet is arranged on the upper portion of the vertical rod, and a buried probe is arranged at the lower end of the vertical rod; and a force sensor and an acceleration sensor are arranged between the buried probe and the vertical rod, and the position, between the electromagnet and the force sensor, of the vertical rod is sleeved with a heavy punch and a buffer spring. The measuring instrument has the beneficial effects that firstly, in the construction process, the bevel compactness can be reasonably measured, a certain precision requirement is achieved, technical parameter control can be conveniently carried out, and a roadbed structure is safer and more reliable; and secondly, carrying is convenient, operation is easy and rapid, a measuring result can be displayed immediately, survey classification can be carried out on a roadbed bevel side slope of an existing road segment, and serves as the basis of quality control in the construction process, and the reliable basis is provided for relevant daily maintenance and future protection measures of a roadbed. The measuring instrument well solves the problem that an existing method and an existing instrument cannot effectively measure the compactness of the roadbed bevel side slope, and consequently, stability cannot be judged.
Description
Technical field
The invention belongs to road construction measuring instrument, be specifically related to a kind of hand-held roadbed slope compaction degree measuring instrument.
Background technology
In road construction, degree of compaction is one of key index of subgrade and pavement detection of construction quality, and degree of compaction refers to the dry density after soil or other road materials compactings and the ratio of standard maximum dry density, represents with percentage.Characterize the density situation after field compaction, degree of compaction is higher, and density is larger, and material monolithic performance is better.
The stability on roadbed side slope inclined-plane has important engineering significance.One is that the degree of compaction on roadbed inclined-plane is relevant with permeability, and under Rainfall Condition, the roadbed side slope inclined-plane that degree of compaction is little easily seeps water, and causes potential risk to the stability of whole roadbed.Two is in the case of seismic events, and the roadbed side slope that degree of compaction is little the soil body easily occurs and to cave in landing, causes the entirety of roadbed to destroy
The measuring method of current Subgrade Compaction adopts sand replacement method and Nucleus Density Apparatus to detect, and its radiation higher of the latter's instrument cost is comparatively large, therefore fills with micromicrofarad in engineering practice and be suitable for more general.
Filling with micromicrofarad general principle is utilize particle diameter 0.30 ~ 0.60mm or 0.25 ~ 0.50mm to clean clean uniform sand, freely fall in examination hole from certain altitude, measure the volume (namely replacing gathering materials in examination hole with standard sand) in examination hole by the principle that its unit weight is constant, and the water content that combination is gathered materials is to extrapolate the actual measurement dry density of sample.Namely on road bed, dig out examination hole, and measure the weight and moisture content of digging out soil sample, then calculate the volume in examination hole with filling micromicrofarad, finally obtain the density of soil sample.
But sand replacement method is that a lot of engineering site measures the main method of degree of compaction at present, and surface looks simple, but usually bad grasp during practical operation, easily cause comparatively big error, often cause quality examination, dispute between superintendent office and unit in charge of construction.So need enough operant levels.And excavate the process time and effort consuming that fetches earth, need survey mark position often more, be not easy to operation.What is more important, for the measurement of roadbed slope compaction degree, because roadbed inclined-plane is not horizontal direction, leak husky whereabouts and freely cannot fill up examination hole, sand replacement method cannot effectively be measured its degree of compaction.
Summary of the invention
The object of this invention is to provide a kind of easy to operate, the degree of accuracy comparatively accurately and structure simple hand-held roadbed slope compaction degree measuring instrument.
Hand-held roadbed slope compaction degree measuring instrument provided by the invention, comprise montant, the top of montant is provided with electromagnet, lower end is provided with the probe that buries, be provided with force snesor and acceleration transducer burying between probe and montant, the montant between electromagnet and force snesor be arranged with weight and buffer spring.
The lower end of described montant is provided with support, and described force snesor and acceleration transducer are located on support, and described buffer spring is located at the top of support.
Described support is made up of upper backup pad, middle gripper shoe and lower supporting plate, is all connected by guiding slide bar between described upper backup pad and middle gripper shoe and between middle gripper shoe and lower supporting plate; Described buffer spring is located at the top that metal montant bottom is positioned at support upper backup pad, and described force snesor is fixed on below upper backup pad, and described acceleration transducer is fixed on lower supporting plate, described in the probe that buries be located at the bottom of described lower supporting plate.
The described probe that buries adopts more piece threaded connection structure.
The top of described montant is provided with A-frame.
Beneficial effect of the present invention:
1, can rationally measure slope compaction degree in work progress, and reach certain required precision, be convenient to carry out technical data control, make road structure safety and reliability;
2, easy to carry, simple and quick, and can instant playback measurement result, exploration classification can be carried out to the roadbed inclined-plane side slope in existing section, as the foundation of quality control in work progress, and for roadbed be correlated with regular maintenance and in the future safeguard procedures reliable basis is provided.
The present invention overcomes existing method and instrument preferably and all effectively can not measure the degree of compaction of roadbed inclined-plane side slope thus judge the problem of its stability.
Technical scheme of the present invention is further illustrated below in conjunction with accompanying drawing.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the acceleration time history plot of probe of burying.
Fig. 3 is the displacement change curve in time of probe of burying.
Fig. 4 is stress change curve in time.
Detailed description of the invention
Hand-held roadbed slope compaction degree measuring instrument of the present invention as shown in Figure 1, comprise ganoid metal montant 3, metal montant 3 is arranged with tup 2 and buffer spring 4, the top of metal montant 3 is provided with electromagnet 1 and is hinged with A-frame 9, and the lower end of metal montant 3 is provided with support 5, support 5 is by upper backup pad 501, middle gripper shoe 502 and lower supporting plate 503 form, connected by guiding slide bar 504 between upper backup pad 501 and middle gripper shoe 502, the lower end of guiding slide bar 504 is fixed in middle gripper shoe 502, the upper end of guiding slide bar 504 is fixed by nut 506 through upper backup pad 501, upper backup pad 501 can along guiding slide bar 504 relative to middle gripper shoe 502 slide downward, connected by guiding slide bar 505 between middle gripper shoe 502 and lower supporting plate 503, the lower end of guiding slide bar 505 is fixed on lower supporting plate 503, the upper end of guiding slide bar 505 is fixed by nut 506 ' through middle gripper shoe 502, middle gripper shoe 502 can along guiding slide bar 505 relative to lower supporting plate 502 slide downward, buffer spring 4 is located at metal montant 3 bottom and is positioned on the scotch 301 at support 5 upper backup pad 501 top, axially force snesor 6 and acceleration transducer 7 is provided with from top to bottom along metal montant 3 in support 5, wherein force snesor 6 is fixed on below upper backup pad 501 corresponding with the projection 507 be located at above middle gripper shoe 502, acceleration transducer 7 is fixed on lower supporting plate 503, and the bottom of support 5 lower supporting plate 503 is provided with the probe 8 that buries, the long 150cm of metal montant 3, diameter 3cm, the length of probe of burying is about 1m, more piece pipe connecting structure can be adopted, screw thread is adopted to twist together between tube coupling and tube coupling, and the probe that buries has different-diameter available (1cm/0.5cm/0.2cm), can according to specific requirement determination depth of probe and diameter in measurement and process of the test.
During experiment, after roadbed side slope inclined-plane chooses survey mark position, set up instrument of the present invention, and fixed by tripod, make measuring instrument metal montant 3 vertical with inclined-plane along inclined-plane normal orientation, tup 2 is adsorbed on the electromagnet 1 on metal montant 3 top before the test, during measurement, start electromagnet 1 switch, electromagnet 1 is made to lose magnetic force, tup 2 is along metal montant 3 free-falling downwards and pound to buffer spring 4, and this design can reduce the manual operation error when placing tup 2, improves measurement result accuracy.When tup 2 falls, gravity is delivered to force snesor 6 by upper backup pad 501, power is delivered to middle gripper shoe 502 again by force snesor 6, acceleration transducer 7 and lower supporting plate 503 is delivered to again by middle gripper shoe 502, the probe 8 that buries be fixed on lower supporting plate 503 can be made to produce the acceleration of direction change at short notice, can be obtained burying by acceleration transducer 7 the time dependent curve of acceleration of probe 8, sees Fig. 2.The accelerating curve obtained is carried out quadratic integral, and the displacement change curve in time of the probe 8 that can obtain burying, is shown in Fig. 3.Same pound due to tup 2 in process of the test, make buffer spring 4 compress the spring force producing constantly change, its large I is measured by force snesor 6, can obtain stress change curve in time thus, see Fig. 4.Obtaining displacement, change curve and stress, in time after change curve, obtain change in displacement maximum value respectively in time
umaxwith STRESS VARIATION maximum value
σ max, the ratio of both peak values is defined as the roadbed side slope inclined-plane coefficient of consolidation
kf, see formula (1), the wherein coefficient of consolidation
kfbe and degree of compaction linearly positively related parameter, therefore the size of degree of compaction can be differentiated by the coefficient of consolidation.
Kf=
σmax / umax（MN/m 3 ）（1）
The data that force snesor 6 and acceleration transducer 7 gather are sent to external data Acquisition Instrument by radio signal, and data collecting instrument receives wireless signal by wireless receiver, and data collecting instrument can carry out storage and the computing of data.
Weight 2 selects different weight quality for different soil property, and range of choices is 5KG/10KG/15KG.
Claims (5)
1. a hand-held roadbed slope compaction degree measuring instrument, it is characterized in that comprising montant, the top of montant is provided with electromagnet, lower end is provided with the probe that buries, be provided with force snesor and acceleration transducer burying between probe and montant, the montant between electromagnet and force snesor be arranged with weight and buffer spring.
2. hand-held roadbed slope compaction degree measuring instrument according to claim 1, it is characterized in that the lower end of described montant is provided with support, described force snesor and acceleration transducer are located on support, and described buffer spring is located at the top of support.
3. hand-held roadbed slope compaction degree measuring instrument according to claim 2, it is characterized in that described support is made up of upper backup pad, middle gripper shoe and lower supporting plate, all connected by guiding slide bar between described upper backup pad and middle gripper shoe and between middle gripper shoe and lower supporting plate; Described buffer spring is located at the top that metal montant bottom is positioned at support upper backup pad, and described force snesor is fixed on below upper backup pad, and described acceleration transducer is fixed on lower supporting plate, described in the probe that buries be located at the bottom of described lower supporting plate.
4. the hand-held roadbed slope compaction degree measuring instrument according to claim 1 or 3, the probe that buries described in it is characterized in that adopts more piece threaded connection structure.
5. hand-held roadbed slope compaction degree measuring instrument according to claim 4, is characterized in that the top of described montant is provided with A-frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510516522.1A CN105155501B (en) | 2015-08-21 | 2015-08-21 | A kind of hand-held roadbed slope compaction degree measuring instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510516522.1A CN105155501B (en) | 2015-08-21 | 2015-08-21 | A kind of hand-held roadbed slope compaction degree measuring instrument |
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| Publication Number | Publication Date |
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| CN105155501A true CN105155501A (en) | 2015-12-16 |
| CN105155501B CN105155501B (en) | 2017-10-17 |
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| CN201510516522.1A Expired - Fee Related CN105155501B (en) | 2015-08-21 | 2015-08-21 | A kind of hand-held roadbed slope compaction degree measuring instrument |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699626A (en) * | 2016-03-23 | 2016-06-22 | 济南祺悦农业科技服务有限公司 | Portable soil compactness tester |
| CN107132125A (en) * | 2017-05-19 | 2017-09-05 | 铜陵长江金刚石工具有限责任公司 | A kind of slope pavement load test instrument |
| CN108600540A (en) * | 2018-04-24 | 2018-09-28 | Oppo广东移动通信有限公司 | fall detection method and related product |
| CN109267559A (en) * | 2018-11-06 | 2019-01-25 | 中铁六局集团有限公司 | Inspection of railway subgrade device |
| CN109633127A (en) * | 2019-01-24 | 2019-04-16 | 山东省农业机械科学研究院 | A kind of soil compaction measuring means, device and method |
| CN111272614A (en) * | 2020-03-11 | 2020-06-12 | 中南大学 | Test device and method for researching vibration compaction mechanism of coarse-grained soil |
| CN112485136A (en) * | 2020-11-09 | 2021-03-12 | 马鞍山海森控电气有限公司 | Digital display compaction rate tester |
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| CN2413279Y (en) * | 2000-03-23 | 2001-01-03 | 铁道部科学研究院铁道建筑研究所 | Drop hammer type roadbed stiffness tester |
| CN201203608Y (en) * | 2008-05-08 | 2009-03-04 | 昆明理工大学 | Detection device for soil impact signal |
| CN201548467U (en) * | 2009-12-11 | 2010-08-11 | 长安大学 | Drop-hammer medium coarse grained soil subgrade compactness rapid tester |
| CN102535425A (en) * | 2012-03-12 | 2012-07-04 | 中铁第五勘察设计院集团有限公司 | Detector for compaction quality of roadbed slope |
| CN204282333U (en) * | 2014-11-30 | 2015-04-22 | 长安大学 | Subgrade Compaction on-site measurement experimental rig |
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2015
- 2015-08-21 CN CN201510516522.1A patent/CN105155501B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2413279Y (en) * | 2000-03-23 | 2001-01-03 | 铁道部科学研究院铁道建筑研究所 | Drop hammer type roadbed stiffness tester |
| CN201203608Y (en) * | 2008-05-08 | 2009-03-04 | 昆明理工大学 | Detection device for soil impact signal |
| CN201548467U (en) * | 2009-12-11 | 2010-08-11 | 长安大学 | Drop-hammer medium coarse grained soil subgrade compactness rapid tester |
| CN102535425A (en) * | 2012-03-12 | 2012-07-04 | 中铁第五勘察设计院集团有限公司 | Detector for compaction quality of roadbed slope |
| CN204282333U (en) * | 2014-11-30 | 2015-04-22 | 长安大学 | Subgrade Compaction on-site measurement experimental rig |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699626A (en) * | 2016-03-23 | 2016-06-22 | 济南祺悦农业科技服务有限公司 | Portable soil compactness tester |
| CN107132125A (en) * | 2017-05-19 | 2017-09-05 | 铜陵长江金刚石工具有限责任公司 | A kind of slope pavement load test instrument |
| CN107132125B (en) * | 2017-05-19 | 2024-04-19 | 铜陵长江金刚石工具股份有限公司 | Slope road surface load tester |
| CN108600540A (en) * | 2018-04-24 | 2018-09-28 | Oppo广东移动通信有限公司 | fall detection method and related product |
| CN108600540B (en) * | 2018-04-24 | 2021-02-26 | Oppo广东移动通信有限公司 | Fall detection method and related product |
| CN109267559A (en) * | 2018-11-06 | 2019-01-25 | 中铁六局集团有限公司 | Inspection of railway subgrade device |
| CN109267559B (en) * | 2018-11-06 | 2023-10-03 | 中铁六局集团有限公司 | Railway roadbed detection device |
| CN109633127A (en) * | 2019-01-24 | 2019-04-16 | 山东省农业机械科学研究院 | A kind of soil compaction measuring means, device and method |
| CN111272614A (en) * | 2020-03-11 | 2020-06-12 | 中南大学 | Test device and method for researching vibration compaction mechanism of coarse-grained soil |
| CN112485136A (en) * | 2020-11-09 | 2021-03-12 | 马鞍山海森控电气有限公司 | Digital display compaction rate tester |
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| Publication number | Publication date |
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| CN105155501B (en) | 2017-10-17 |
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Granted publication date: 20171017 Termination date: 20180821 |