CN106223305A - A kind of automatic consideration energy correction and the dynamic driving instrument of dynamic response - Google Patents
A kind of automatic consideration energy correction and the dynamic driving instrument of dynamic response Download PDFInfo
- Publication number
- CN106223305A CN106223305A CN201610608083.1A CN201610608083A CN106223305A CN 106223305 A CN106223305 A CN 106223305A CN 201610608083 A CN201610608083 A CN 201610608083A CN 106223305 A CN106223305 A CN 106223305A
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- CN
- China
- Prior art keywords
- feeler lever
- dynamic
- cone
- strain gauge
- fin stabilizer
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
- E02D1/02—Investigation of foundation soil in situ before construction work
- E02D1/022—Investigation of foundation soil in situ before construction work by investigating mechanical properties of the soil
Abstract
The invention discloses a kind of automatic consideration energy correction and the dynamic driving instrument of dynamic response, this penetrometer includes that order is drop hammer (7), rear-fin stabilizer (6), feeler lever (1) from top to bottom；Wherein, feeler lever (1) upper end is connected with rear-fin stabilizer (6), in feeler lever (1) upper end, inwall is symmetrically installed the 3rd strain gauge (4.3), rear-fin stabilizer (6) lower end is arranged with the second acceleration transducer (3.2), the bottom of feeler lever (1) is cone (2), the first acceleration transducer (3.1) and the second strain gauge (4.2) it is provided with in the feeler lever (1) on cone (2) top, feeler lever (1) is externally provided with friction sleeve (5), and friction sleeve (5) napex inwall is provided with the first strain gauge (4.1)；The top of rear-fin stabilizer (6) is automatically to excite drop hammer (7) fallen, and the signal of telecommunication of each sensor of this penetrometer is sent to data collection and analysis instrument (9) by coaxial cable (8.1), signal cable (8.2).This dynamic driving instrument can evaluate dynamic response, detection soil strength, the feature such as has in situ, multi-functional, automatic.
Description
Technical field
The present invention relates to a kind of automatic consideration energy correction and the dynamic driving instrument of dynamic response, belong to Geotechnical Engineering field
A kind of dynamic sounding equipment in situ field tests.
Background technology
Dynamic penetration test is a kind of in-situ testing method applied in geotechnical engineering investigation, and it is to utilize certain mass
Drop hammer, squeeze in soil layer, according to the difficulty or ease of probe injection with freely falling of certain altitude away from the circular cone of standard specifications is popped one's head in
Degree judges the character of soil layer.From the ultimate principle of dynamic penetration test, the key issue of dynamic trial and error test is exactly feeler lever
By the axial impact force in feeler lever after drop impact and hammering can transmit, conversion rule.Existing dynamic penetration test is such as
Mark passes through in place of test (SPT), dynamic sounding (DCP) hammering mechanism and design theory still have many ambiguous, and theory falls far away
After in practice, the fewest to evaluation, the hammering energy study on the transformation of cone dynamic response, so cause the waste of energy, for pan soil
The prospecting in place, it is impossible to effectively detect the character of injection hard stratum.
Experimental Method in Laboratory depends on sampling technique, therefore suffers from the impact of sampling disturbance and dimensional effect, and be given surveys
Examine design parameter reliability the strongest.The physical mechanical property index of the surveyed soil body tends not to represent the initial condition of soil layer and refers to
Mark, the engineer applied greatly reducing Soil Parameters is worth.
The present invention is based on conventional dynamic sounding equipment, it is proposed that a kind of automatic consideration energy correction and dynamic response dynamic
Power penetrometer, it is possible to detect the character of the injection hard stratum soil body exactly, it is also possible to the transfer of quantitative Analysis cone energy, it is achieved
The automatic correction of energy, evaluates the dynamic response in cone penetration process, can recognize the firm of the injection hard formation soil body all-sidedly and accurately
Degree characteristic, reduces the waste of hammering energy, is effectively shortened hard stratum geologic prospect evaluation cycle by optimizing design.
Summary of the invention
Technical problem: the present invention overcomes the deficiency that prior art exists, technical problem to be solved to be to provide one certainly
Dynamic consideration energy correction and the dynamic driving instrument of dynamic response.
Technical scheme: a kind of automatic consideration energy correction of the present invention and the dynamic driving instrument of dynamic response include from up to
Lower order for dropping hammer, rear-fin stabilizer, feeler lever；Wherein, feeler lever upper end is connected with rear-fin stabilizer, and in feeler lever upper end, inwall is symmetrically installed
3rd strain gauge, rear-fin stabilizer lower end is arranged with the second acceleration transducer, and the bottom of feeler lever is cone, on cone top
Feeler lever in be provided with the first acceleration transducer and the second strain gauge, feeler lever is externally provided with friction sleeve, and rub sleeve top inner wall
It is provided with the first strain gauge；The top of rear-fin stabilizer is automatically to excite that falls to drop hammer, the signal of telecommunication of each sensor of this penetrometer by
Coaxial cable, signal cable are sent to data collection and analysis instrument.
Described feeler lever diameter from top to bottom is identical.
Described feeler lever is identical with the maximum gauge of cone.
The strain gauge of described each position is each configured to full-bridge circuit.
Beneficial effect: the present invention solves the difficulty that domestic dynamic sounding cannot evaluate cone dynamic response, hammering can be revised
Topic；The strain gauge balanced configuration of each position becomes full-bridge circuit, it is possible to increases resistance, reduce temperature and curvature effect impact, has
It is beneficial to the accuracy of test index；The character of the injection hard stratum soil body can be detected exactly, it is also possible to quantitative Analysis cone energy
The conversion of amount, and automatically carry out the collection of data, process, store work.The strong of the injection hard formation soil body can be recognized all-sidedly and accurately
Degree characteristic, is effectively shortened hard stratum geologic prospect evaluation cycle, reduces energy dissipation by optimizing, and reduces prospecting cost.
Accompanying drawing explanation
Fig. 1 is the component arrangement schematic diagram of the present invention；
Wherein have: feeler lever 1, cone 2, the first acceleration transducer 3.1, the second acceleration transducer 3.2, the first strain gauge
4.1, the second strain gauge 4.2, the 3rd strain gauge 4.3, rub sleeve 5, and rear-fin stabilizer 6 drops hammer 7, coaxial cable 8.1, signal electricity
Cable 8.2, data collection and analysis instrument 9.
Detailed description of the invention
A kind of automatic consideration energy correction of the present invention and the dynamic driving instrument of dynamic response include this penetrometer include from
Up to lower order for dropping hammer 7, rear-fin stabilizer 6, feeler lever 1；Wherein, feeler lever 1 upper end is connected with rear-fin stabilizer 6, in feeler lever 1 upper end
Wall is symmetrically installed the 3rd strain gauge 4.3, and rear-fin stabilizer 6 lower end is arranged with the second acceleration transducer 3.2, feeler lever 1 under
End is cone 2, is provided with the first acceleration transducer 3.1 and the second strain gauge 4.2, outside feeler lever 1 in the feeler lever 1 on cone 2 top
Being provided with friction sleeve 5, friction sleeve 5 top inner wall is provided with the first strain gauge 4.1；The top of rear-fin stabilizer 6 is for automatically exciting pendant
Fall drops hammer 7, and the signal of telecommunication of each sensor of this penetrometer is sent to data collection and analysis by coaxial cable 8.1, signal cable 8.2
Instrument 9.
Described feeler lever external diameter is 24cm, and internal diameter is 14cm.
Described point angle is 60 °.
Described friction length sleeve is 90cm.
Described cone projected area is 4.52cm2。
Described rear-fin stabilizer is I-shaped template.
Described dropping hammer is hammered into shape for annular, and quality is 8kg, falls away from for 575cm.
During the soil body of dynamic injection, strain gauge and the acceleration transducer of feeler lever upper end and cone can be surveyed continuously
Amount, the strain of measurement is converted to stress value, and the acceleration value Integral Transformation of acceleration transducer test is speed, cone
Impulsive force FABeing obtained by acceleration transducer, be used for evaluating the dynamic response of cone, the strain gauge of cone is used for evaluating cone
Resistance and energy variation, the strain gauge of friction sleeve upper end is used for testing total resistance, i.e. static point resistance and sleeve frictional resistance
Sum.The strain gauge of feeler lever upper end is used for testing the impact conversion energy dropped hammer, and the acceleration transducer of feeler lever upper end is used for subtracting
The impact of the eccentric impact load of little equilibrium.
The present invention considers energy correction and the dynamic driving instrument of dynamic response automatically, and its feeler lever upper end is to end cone under feeler lever
The energy transfer E of point, can be calculated by following formula:
E=∫ FS·VAdt
F in formulasFor the power of the strain conversion that cone strain gauge is measured, VAFor penetrating speed value, can be by cone acceleration test
Value is calculated through numerical integration, such as following formula:
VA=∫ adt
In formula, a is cone acceleration test value, and dt is time integral step-length；
Feeler lever cone impulsive force FA:
FA=ma
In formula, m is feeler lever quality
The cone impulsive force of feeler lever can also be calculated by following formula:
E in formula, C, A are respectively elastic modelling quantity, feeler lever cross-sectional area, the velocity of longitudinal wave of feeler lever.
So impulsive force of feeler lever cone can mutually correct, and improves the accuracy of test, has effectively carried out injection
The dynamic response assessment of static point resistance in journey.
In penetration process, the stablizing of dynamic penetrometer when being present to ensure that drop impact of rear-fin stabilizer 6.
This test device retains and improves the function of conventional penetrometer, it is possible to easily and fast, accurately, survey at low cost
Determine the physico-mechanical properties of hard stratum, and carry out the collection of data voluntarily, process, store work, it is possible to automatically carry out energy and repair
Just, detect soil strength, evaluate the dynamic response in cone penetration process.
Claims (4)
1. an automatic consideration energy correction and the dynamic driving instrument of dynamic response, it is characterised in that this penetrometer includes from up to
Lower order is drop hammer (7), rear-fin stabilizer (6), feeler lever (1)；Wherein, feeler lever (1) upper end is connected, at feeler lever with rear-fin stabilizer (6)
(1) upper end inwall is symmetrically installed the 3rd strain gauge (4.3), and rear-fin stabilizer (6) lower end is arranged with the second acceleration transducer
(3.2), the bottom of feeler lever (1) is cone (2), is provided with the first acceleration transducer in the feeler lever (1) on cone (2) top
(3.1) with the second strain gauge (4.2), feeler lever (1) is externally provided with friction sleeve (5), and friction sleeve (5) top inner wall is provided with first should
Become meter (4.1)；The top of rear-fin stabilizer (6) is automatically to excite drop hammer (7) fallen, the signal of telecommunication of each sensor of this penetrometer by
Coaxial cable (8.1), signal cable (8.2) are sent to data collection and analysis instrument (9).
Automatic consideration energy correction the most according to claim 1 and the dynamic driving instrument of dynamic response, it is characterised in that institute
Feeler lever (1) diameter from top to bottom stated is identical.
Automatic consideration energy correction the most according to claim 2 and the dynamic driving instrument of dynamic response, it is characterised in that institute
The feeler lever (1) stated is identical with the maximum gauge of cone (2).
Automatic consideration energy correction the most according to claim 1 and 2 and the dynamic driving instrument of dynamic response, it is characterised in that
The strain gauge of described each position is each configured to full-bridge circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610608083.1A CN106223305B (en) | 2016-07-28 | 2016-07-28 | A kind of automatic dynamic driving instrument for considering energy correction and dynamic response |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610608083.1A CN106223305B (en) | 2016-07-28 | 2016-07-28 | A kind of automatic dynamic driving instrument for considering energy correction and dynamic response |
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| CN106223305A true CN106223305A (en) | 2016-12-14 |
| CN106223305B CN106223305B (en) | 2018-03-20 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219134A (en) * | 2017-07-03 | 2017-09-29 | 中国人民解放军军械工程学院 | Terra mechanics parameter test device |
| CN107727687A (en) * | 2017-11-14 | 2018-02-23 | 东南大学 | A kind of off-axis thermal conductivity dynamic injection in-situ testing device for testing soil body thermal conductivity |
| CN108385647A (en) * | 2018-01-26 | 2018-08-10 | 大连理工大学 | Divide gear speed governing type geotechnique's injection crossbow |
| CN109736284A (en) * | 2018-12-14 | 2019-05-10 | 东南大学 | It is a kind of for evaluating the vibration device and its test method of soil body dynamic characteristics |
| CN111593717A (en) * | 2020-05-28 | 2020-08-28 | 东南大学 | Novel pore pressure static sounding device for pile foundation performance test |
| WO2022025756A1 (en) * | 2020-07-30 | 2022-02-03 | Ihc Holland Ie B.V. | Testing system |
| WO2022025755A1 (en) * | 2020-07-30 | 2022-02-03 | Ihc Holland Ie B.V. | Testing system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219134A (en) * | 2017-07-03 | 2017-09-29 | 中国人民解放军军械工程学院 | Terra mechanics parameter test device |
| CN107727687A (en) * | 2017-11-14 | 2018-02-23 | 东南大学 | A kind of off-axis thermal conductivity dynamic injection in-situ testing device for testing soil body thermal conductivity |
| CN108385647A (en) * | 2018-01-26 | 2018-08-10 | 大连理工大学 | Divide gear speed governing type geotechnique's injection crossbow |
| CN109736284A (en) * | 2018-12-14 | 2019-05-10 | 东南大学 | It is a kind of for evaluating the vibration device and its test method of soil body dynamic characteristics |
| CN109736284B (en) * | 2018-12-14 | 2021-01-12 | 东南大学 | Testing method of vibration device for evaluating dynamic characteristics of soil body |
| CN111593717A (en) * | 2020-05-28 | 2020-08-28 | 东南大学 | Novel pore pressure static sounding device for pile foundation performance test |
| WO2022025756A1 (en) * | 2020-07-30 | 2022-02-03 | Ihc Holland Ie B.V. | Testing system |
| WO2022025755A1 (en) * | 2020-07-30 | 2022-02-03 | Ihc Holland Ie B.V. | Testing system |
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| Publication number | Publication date |
|---|---|
| CN106223305B (en) | 2018-03-20 |
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