CN103364294A - Guide-cylinder drop-hammer type rapid bearing ratio detector - Google Patents
Guide-cylinder drop-hammer type rapid bearing ratio detector Download PDFInfo
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- CN103364294A CN103364294A CN2013103200433A CN201310320043A CN103364294A CN 103364294 A CN103364294 A CN 103364294A CN 2013103200433 A CN2013103200433 A CN 2013103200433A CN 201310320043 A CN201310320043 A CN 201310320043A CN 103364294 A CN103364294 A CN 103364294A
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Abstract
The invention discloses a guide-cylinder drop-hammer type rapid bearing ratio detector. The detector comprises a guide cylinder, a drop hammer is arranged in the inner of the guide cylinder, a hammer rod is arranged on the upper part of the drop hammer, a drop hammer handle is arranged on the upper end of the hammer rod, an acceleration sensor is arranged in the inner of the drop hammer handle, and the acceleration sensor is connected to an electronic test device through a signal wire. A base seat is arranged on the edge of the lower opening of the guide cylinder, a positioning pin is arranged in the inner wall of the upper opening of the guide cylinder, and a guide cylinder handle is arranged on the outer wall. First, the drop hammer in the guide cylinder drops freely from a certain height and hits the roadbed surface. Related relations between the acceleration sensor signal and the bearing ratio are obtained through contrast tests, and the bearing ratio of the roadbed earth is obtained. The detector has the advantages of rapid detection speed and accurate detection result.
Description
Technical field
The present invention relates to a kind of bearing ratio pick-up unit, relate in particular to the quick bearing ratio detector of a kind of guide drop hammer type.
Background technology
Bearing ratio is the intensity index of reflection subgrade soils and bedding material.Bearing ratio is called for short the CBR value, when referring to adopt in the standard-sized injection bar injection test specimen 2.5mm or 5.0mm, and the ratio of standard load intensity during required load intensity injection amount identical with the standard rubble.Bearing-ratio test comprises indoor and on-the-spot bearing-ratio test.
In the prior art, for the test method of bearing ratio be:
Actuating motor or shake the penetrometer crank, apply axle pressure, make the injection bar with the speed pressing in sample of (1～1.25) mm/min, record dynamometer reading and corresponding injection amount, and the reading should make the injection amount reach 2.5mm the time is no less than 5 groups, tests to the injection amount stopping during for (10～12.5) mm; Take load intensity as horizontal ordinate, the injection amount is ordinate, draws load intensity and injection magnitude relation curve, calculates bearing ratio.
There is following shortcoming at least in above-mentioned prior art:
Test method needs counterforce device, detection speed slow.
Summary of the invention
The purpose of this invention is to provide that a kind of detection speed is fast, the testing result quick bearing ratio detector of guide drop hammer type accurately.
The objective of the invention is to be achieved through the following technical solutions:
The quick bearing ratio detector of guide drop hammer type of the present invention, comprise guide cylinder, be provided with in the described guide cylinder and drop hammer, described top of dropping hammer is provided with hammer stem, described hammer stem is provided with acceleration transducer, and described acceleration transducer is connected by signal wire with electronic test equipment.
As seen from the above technical solution provided by the invention, the quick bearing ratio detector of the guide drop hammer type that the embodiment of the invention provides, because guide cylinder, be provided with in the guide cylinder and drop hammer, the top of dropping hammer is provided with hammer stem, hammer stem is provided with acceleration transducer, acceleration transducer is connected by signal wire with electronic test equipment, during application, can at first allow dropping hammer from the certain altitude free-falling in the guide cylinder, impact road bed, and draw correlationship between described acceleration transducer signals and the bearing ratio by contrast test; Then according to the correlationship between described acceleration transducer signals and the bearing ratio, draw the bearing ratio of subgrade soil, detection speed is fast, testing result is accurate.
Description of drawings
The structural representation of the quick bearing ratio detector of guide drop hammer type that Fig. 1 provides for the embodiment of the invention.
Among the figure:
1-acceleration transducer, the 2-handle that drops hammer, the 3-hammer stem, the 4-electronic test equipment, the 5-register pin, the 6-guide cylinder, 7-drops hammer, 8-guide handle.
Embodiment
The below will be described in further detail the embodiment of the invention.
The quick bearing ratio detector of guide drop hammer type of the present invention, its better embodiment is:
Comprise guide cylinder, be provided with in the described guide cylinder and drop hammer, described top of dropping hammer is provided with hammer stem, and described hammer stem is provided with acceleration transducer, and described acceleration transducer is connected by signal wire with electronic test equipment.
The upper end of described hammer stem is provided with the handle that drops hammer, and described acceleration transducer is located at the described handle inside of dropping hammer.
Described guide cylinder is steel cylinder, and the edge of the end opening of described steel cylinder is provided with base.
The inwall suitable for reading of described steel cylinder is provided with register pin.
The outer wall of described steel cylinder is provided with the guide handle.
Use the quick bearing ratio detector of guide drop hammer type of the present invention, can at first allow dropping hammer from the certain altitude free-falling in the guide cylinder, impact road bed, and draw correlationship between described acceleration transducer signals and the bearing ratio by contrast test; Then according to the correlationship between described acceleration transducer signals and the bearing ratio, draw the bearing ratio of subgrade soil, detection speed is fast, testing result is accurate.
Specific embodiment:
As shown in Figure 1, the quick bearing ratio detector of guide drop hammer type is comprised of three parts:
(1) guide cylinder: play the guiding role to dropping hammer, determine to drop hammer and pound to the position of test surfaces and the height of drop that drops hammer.
(2) drop hammer: the quality of dropping hammer is certain value, and acceleration transducer is equipped with in inside, and the top of dropping hammer is connected with handle, and the wire that passes through of acceleration transducer links to each other with electronic test equipment by handle.
(3) electronic test equipment: gather the acceleration signal that drops hammer, and automatically calculate to the received signal, process, store and show test results.
During detection, at first allow dropping hammer from the certain altitude free-falling in the guide cylinder, impact road bed, and draw correlationship between described acceleration transducer signals and the bearing ratio by contrast test; Then according to the correlationship between described acceleration transducer signals and the bearing ratio, draw the bearing ratio of subgrade soil.The above-mentioned soil body can be the on-the-spot soil body or the sample soil body.
The present invention carries out quick bearing-ratio test to roadbed filling and subgrade strength, reaches detection speed fast, does not need counterforce device, and testing result more can reflect the intensive parameter of roadbed filling under dynamic loading, can be used for detecting the bearing ratio CBR value of roadbed filling.But have advantages of that instrument is light and handy, simple to operation, detection speed is fast, accurately objective, testing result automatic printing and storage of data; Reduce the labour intensity of testing crew, improved detection efficiency.
The test philosophy of the quick bearing ratio detector of guide drop hammer type of the present invention is:
Dropping hammer along guide cylinder from the certain altitude free-falling of fixed mass, the soil body is produced impact, simultaneously the reacting force of the soil body makes the upwards resilience of dropping hammer, and by the drop hammer acceleration of resilience of detection, and acceleration transducer signals draws corresponding CBR value with correlationship between the bearing ratio CBR.The resilience acceleration that wherein drops hammer records by the acceleration transducer that is installed in dropping hammer.
Concrete testing procedure is:
1, at smooth test surfaces, places guide cylinder, drops hammer and electronic test equipment.
2, open electronic test equipment, prepare to begin test.
3, with drop hammer lifting to specified altitude assignment, release handle makes its free-falling, drops hammer stable rear by previous methods continuation execution operation next time, to soil body generation impact, each test result all is presented in the electronic test equipment, with the test value that impacts as test findings.
Beneficial effect of the present invention comprises:
Adopt the dynamic load mode, do not need counterforce device; Calculate soil body CBR index by the drop hammer accekeration of resilience of detection; Electronic test equipment is calculated testing result automatically, automatically calculates the CBR value; Instrument is light and handy, easy to use, simple to operate, detection speed is fast, data are accurately objective.
The above; only for the better embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (5)
1. the quick bearing ratio detector of guide drop hammer type is characterized in that, comprises guide cylinder, be provided with in the described guide cylinder and drop hammer, described top of dropping hammer is provided with hammer stem, and described hammer stem is provided with acceleration transducer, and described acceleration transducer is connected by signal wire with electronic test equipment.
2. the quick bearing ratio detector of guide drop hammer type according to claim 1 is characterized in that, the upper end of described hammer stem is provided with the handle that drops hammer, and described acceleration transducer is located at the described handle inside of dropping hammer.
3. the quick bearing ratio detector of guide drop hammer type according to claim 2 is characterized in that, described guide cylinder is steel cylinder, and the edge of the end opening of described steel cylinder is provided with base.
4. the quick bearing ratio detector of guide drop hammer type according to claim 3 is characterized in that, the inwall suitable for reading of described steel cylinder is provided with register pin.
5. the quick bearing ratio detector of guide drop hammer type according to claim 4 is characterized in that, the outer wall of described steel cylinder is provided with the guide handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103200433A CN103364294A (en) | 2013-07-26 | 2013-07-26 | Guide-cylinder drop-hammer type rapid bearing ratio detector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103200433A CN103364294A (en) | 2013-07-26 | 2013-07-26 | Guide-cylinder drop-hammer type rapid bearing ratio detector |
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| CN103364294A true CN103364294A (en) | 2013-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013103200433A Pending CN103364294A (en) | 2013-07-26 | 2013-07-26 | Guide-cylinder drop-hammer type rapid bearing ratio detector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107525724A (en) * | 2016-06-22 | 2017-12-29 | 上海宝钢工业技术服务有限公司 | Quantitative hammer for Site Detection roof color steel plate security |
| CN115015110A (en) * | 2022-06-23 | 2022-09-06 | 中交二航武汉港湾新材料有限公司 | Foam light soil layering detection device and detection method |
| CN117288606A (en) * | 2023-11-27 | 2023-12-26 | 太原理工大学 | Large impact load loading device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1524445A (en) * | 1975-03-17 | 1978-09-13 | Univ Western Australia | Impact soil testing device |
| 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 |
| CN101545841A (en) * | 2008-03-25 | 2009-09-30 | 四川升拓检测技术有限责任公司 | Method and device for falling-sphere spot testing of mechanics characteristics of rock and soil materials |
| CN102053040A (en) * | 2010-11-24 | 2011-05-11 | 中铁第五勘察设计院集团有限公司 | Dynamic bearing ratio detecting method and instrument |
| CN203365260U (en) * | 2013-07-26 | 2013-12-25 | 中铁第五勘察设计院集团有限公司 | Rapid bearing ratio detector provided with guide cylinder and drop hammer |
-
2013
- 2013-07-26 CN CN2013103200433A patent/CN103364294A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1524445A (en) * | 1975-03-17 | 1978-09-13 | Univ Western Australia | Impact soil testing device |
| 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 |
| CN101545841A (en) * | 2008-03-25 | 2009-09-30 | 四川升拓检测技术有限责任公司 | Method and device for falling-sphere spot testing of mechanics characteristics of rock and soil materials |
| CN102053040A (en) * | 2010-11-24 | 2011-05-11 | 中铁第五勘察设计院集团有限公司 | Dynamic bearing ratio detecting method and instrument |
| CN203365260U (en) * | 2013-07-26 | 2013-12-25 | 中铁第五勘察设计院集团有限公司 | Rapid bearing ratio detector provided with guide cylinder and drop hammer |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107525724A (en) * | 2016-06-22 | 2017-12-29 | 上海宝钢工业技术服务有限公司 | Quantitative hammer for Site Detection roof color steel plate security |
| CN115015110A (en) * | 2022-06-23 | 2022-09-06 | 中交二航武汉港湾新材料有限公司 | Foam light soil layering detection device and detection method |
| CN117288606A (en) * | 2023-11-27 | 2023-12-26 | 太原理工大学 | Large impact load loading device |
| CN117288606B (en) * | 2023-11-27 | 2024-01-23 | 太原理工大学 | Large impact load loading device |
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Application publication date: 20131023 |