CN104596866B - A kind of detector for being applied to measure bury body rigidity and intensity simultaneously - Google Patents
A kind of detector for being applied to measure bury body rigidity and intensity simultaneously Download PDFInfo
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- CN104596866B CN104596866B CN201510022089.6A CN201510022089A CN104596866B CN 104596866 B CN104596866 B CN 104596866B CN 201510022089 A CN201510022089 A CN 201510022089A CN 104596866 B CN104596866 B CN 104596866B
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Abstract
It is used to measure sea bed bury rigidity simultaneously in the related model test of ocean engineering the invention discloses a kind of（Resist the ability of deformation）And intensity（Resist the ability of destruction）Detector.The detector mainly includes crossbeam, two montants, two horizontal feeler inspection cylinders, two groups of foil gauges, signal generator, ultrasonic wave sheet emitting, ultrasonic wave receiving sheet, computers；The invention provides the seabed foundations mechanics parameter (i.e. the rigidity and intensity of bury) of key for the safe design of works on bury sea bed (such as offshore drilling platform).
Description
Technical field
The invention belongs to related to ocean engineering, the technology neck that engineering mechanical properties are detected is used in testing indoors
Domain, is related to a kind of be applied to while measuring the detector of bury body rigidity and intensity.
Background technology
The petroleum resources in the whole world more than 70% is contained in seabed.The exploration of oil gas, the exploitation offshore drilling that places one's entire reliance upon are put down
Platform.Drilling platforms subjects the loads such as marine typhoon, billow.Pile foundation or anchoring positioning system of these loads by drilling platforms
System passes to seabed soil.Under these load actions, the bury on sea bed resists the ability of destruction（Intensity）With resist change
The ability of shape（Rigidity）The security and stability of offshore drilling platform are determined respectively.
Related theoretical research and the foundation of numerical model need a large amount of test reliably and in detail to test data to be tested
Card and optimization.For the test in situ of deep-sea, model test method has low-cost, it is easy to operate, the external world is done
The advantages of factor is few is disturbed, there is irreplaceable effect in scientific research.In order that model test has with test in situ
The strength and stiffness for having the bury prepared in comparativity, model test need consistent with live submarine soft soil.However, existing
Detector can only measure the intensity of bury, still lack be capable of the detector of direct measurement bury rigidity so far.Based on this,
The present invention proposes that a kind of energy can measure the detector of bury rigidity and intensity simultaneously.
The content of the invention
The purpose of the present invention be fill up the vacancy of prior art there is provided it is a kind of can be while measuring bury rigidity and intensity
Detector.
The purpose of the present invention is achieved through the following technical solutions：One kind is applied to measure bury rigidity simultaneously and strong
The detector of degree, including crossbeam, two montants, two horizontal feeler inspection cylinders, two groups of foil gauges, signal generator,
One ultrasonic wave sheet emitting, ultrasonic wave receiving sheet, a computer；The two ends of crossbeam are separately mounted to the top of two montants
Portion, two horizontal feeler inspection cylinders are separately mounted to two montant bottoms；Two groups of foil gauges are separately mounted to two montant bottoms, and
It is connected with computer；Ultrasonic wave sheet emitting and ultrasonic wave receiving sheet are simultaneously separately mounted in two horizontal feeler inspection cylinders, described
Ultrasonic wave sheet emitting and ultrasonic wave receiving sheet are flexure element, wherein, ultrasonic wave sheet emitting is connected with signal generator, ultrasonic wave
Sheet emitting launches shearing wave ultrasonic signal to ripple receiving sheet, receives ultrasonic wave receiving sheet and is connected with computer, by cutting for receiving
Cut ripple ultrasonic signal and be transferred to computer.
The beneficial effects of the invention are as follows：1. realize first while measuring two most important mechanics parameters of bury
（Rigidity and intensity）；2. technology is simple, easily realize；3. one-shot measurement, while obtaining two intensity curves, plays and mutually tests
Card, strengthens the effect of data reliability.
Brief description of the drawings
Fig. 1 is the overall structure diagram of detector；
Fig. 2 is the scheme of installation of foil gauge；
Fig. 3 is the scheme of installation of ultrasonic wave sheet emitting；
Fig. 4 is the installation graph of ultrasonic wave sheet emitting and ultrasonic wave receiving sheet；
Fig. 5 is loading device figure of the detector in model test；
In figure, crossbeam 1, montant 2, horizontal feeler inspection cylinder 3, foil gauge 4, ultrasonic wave sheet emitting 5, ultrasonic wave receiving sheet 6, ring
Oxygen tree fat 7.
Embodiment：
A kind of detector for being applied to measurement seabed soil rigidity and intensity, including crossbeam 1, two montants 2, two
Horizontal feeler inspection cylinder 3, two groups of foil gauges 4, signal generator, ultrasonic wave sheet emitting, ultrasonic wave receiving sheet, one
Platform computer；As Figure 1-4, crossbeam 1 is arranged on the top of two montants 2, and two horizontal feeler inspection cylinders 3 are separately mounted to two
The bottom of root montant 2；Two groups of foil gauges 4 are separately mounted to the bottom of montant 2（Every group of foil gauge includes two panels foil gauge）；Two groups of strains
Piece 4 is connected with computer, sends the result resistance of soil measured to computer；Ultrasonic wave sheet emitting 5 and ultrasonic wave are received
Piece 6 is simultaneously separately mounted in two horizontal feeler inspection cylinders 3, and they are flexure element, and two flexure elements are relative, and wherein ultrasonic wave is sent out
The transmitting shearing wave of piece 5 is penetrated, ultrasonic wave receiving sheet 6 receives shearing wave, and ultrasonic wave sheet emitting 5 is connected with signal generator, ultrasonic wave
Receiving sheet 6 is connected with computer, transmits data to computer.
As technological means commonly used in the art, foil gauge 4 is coated with epoxy resin 7, to prevent foil gauge 4 to be damaged.
The implementation process of the detector of the present invention is as follows：
As shown in figure 3, by setting counter-force girder steel, using hydraulic jack by detector of the present invention with 20mm/s speed
At the uniform velocity, continuously injection is into bury, and the clay drag that two horizontal feeler inspection cylinders 3 are subject to is obtained by the measurement of foil gauge 4, is surveyed
The data that the resistance of soil obtained changes with depth of penetration are stored into computer.The resistance of soil arrived based on computer acquisition, root
According to below equation, it can calculate and obtain seabed soil shearing strength：
Shearing strength=resistance of soil/（3 cross-sectional areas of detector cylinder × coefficient of bearing caoacity）.
According to Randolph, M.F., the The limiting pressure on of and Houlsby, G.T. 1984.
a circular pile loaded laterally in cohesive soil. Géotechnique, 34(4): 613–
623. understand that coefficient of bearing caoacity typically takes 10.5.
Meanwhile, ultrasonic wave sheet emitting 5 sends ultrasonic signal in the presence of signal generator to ultrasonic wave receiving sheet 6
（The soil body shears wave beam）, ultrasonic wave receiving sheet 6 is connected with computer, by the ultrasonic signal received（The soil body shears wave beam）Pass
Give computer.By the time difference for calculating ultrasonic wave transmitting and receiving, propagation time of the shearing wave in the soil body can be obtained.
Meanwhile, the distance between ultrasonic wave sheet emitting 5 and ultrasonic wave receiving sheet 6 are known.Pass through " shear wave velocity=probe distance/biography
Between sowing time " spread speed for obtaining shearing wave in the soil body is calculated, then computer below equation calculates the rigidity of clay：
Soil body rigidity=soil body density ×（Soil body shear wave velocity）2
Wherein, soil body density can be tested by indoor density experiment and obtained.
In addition to measuring the strength and stiffness of clay, the present invention can also obtain the Soil Sensitivity of sea bed bury
（The easy degree of seabed soil weakening strength under cyclic load）.When carrying out Soil Sensitivity test, this is sent out first
Then bright detector injection is stood to designated depth, then carry out in the range of 2 times of the probing column diameter above and below it is past
Multiple motion, while recording the data of resistance of soil, one untill data reach a certain stationary value, can finally obtain as follows
To the sensitivity of clay.
Resistance of soil after Soil Sensitivity=initial resistance of soil/stabilization.
Claims (1)
1. a kind of detector for being applied to measure bury rigidity and intensity simultaneously, it is characterised in that including a crossbeam（1）、
Two montants（2）, two pieces horizontal feeler inspection cylinders（3）, two groups of foil gauges（4）, signal generator, a ultrasonic wave sheet emitting
（5）, ultrasonic wave receiving sheet (6), a computer；Crossbeam（1）Two ends be separately mounted to two montants（2）Top,
Two horizontal feeler inspection cylinders（3）It is separately mounted to two montants（2）Bottom；Two groups of foil gauges（4）It is separately mounted to two montants
（2）Bottom, and be connected with computer；Ultrasonic wave sheet emitting（5）With ultrasonic wave receiving sheet（6）And it is separately mounted to two levels
Feeler inspection cylinder（3）It is interior, the ultrasonic wave sheet emitting（5）With ultrasonic wave receiving sheet（6）It is flexure element, wherein, ultrasonic wave transmitting
Piece（5）It is connected with signal generator, ultrasonic wave sheet emitting（5）To ultrasonic wave receiving sheet（6）Launch shearing wave ultrasonic signal, connect
Receive ultrasonic wave receiving sheet（6）It is connected with computer, the shearing wave ultrasonic signal received is transferred to computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510022089.6A CN104596866B (en) | 2015-01-16 | 2015-01-16 | A kind of detector for being applied to measure bury body rigidity and intensity simultaneously |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510022089.6A CN104596866B (en) | 2015-01-16 | 2015-01-16 | A kind of detector for being applied to measure bury body rigidity and intensity simultaneously |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104596866A CN104596866A (en) | 2015-05-06 |
| CN104596866B true CN104596866B (en) | 2017-07-28 |
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| CN201510022089.6A Active CN104596866B (en) | 2015-01-16 | 2015-01-16 | A kind of detector for being applied to measure bury body rigidity and intensity simultaneously |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007798B (en) * | 2017-10-24 | 2020-03-31 | 湖南大学 | Penetration type soil body strength and wave velocity combined test device and use method thereof |
| CN108318326B (en) * | 2018-01-19 | 2020-11-20 | 浙江大学 | Miniature static sounding probe rod |
| CN108776211B (en) * | 2018-06-22 | 2024-04-02 | 浙江大学 | Device for simulating influence of shallow air spraying disaster in slope seabed on existing ocean foundation |
| CN111413217B (en) * | 2020-04-24 | 2021-06-15 | 山东大学 | Deep soil shear wave velocity testing device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2033507U (en) * | 1988-06-02 | 1989-03-01 | 同济大学 | Ultrasonic axial strero gauge |
| CN101158673A (en) * | 2007-11-16 | 2008-04-09 | 中国科学院力学研究所 | In-situ measurement probe |
| CN201901866U (en) * | 2010-09-30 | 2011-07-20 | 浙江大学 | T-shaped contact detector applied to deep-sea seabed feature testing |
| CN102879468A (en) * | 2012-09-18 | 2013-01-16 | 东北大学 | Double-bending-element ultrasonic sensing test device and method for evaluating rock damage |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6968910B2 (en) * | 2001-12-20 | 2005-11-29 | Yoseph Bar-Cohen | Ultrasonic/sonic mechanism of deep drilling (USMOD) |
-
2015
- 2015-01-16 CN CN201510022089.6A patent/CN104596866B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2033507U (en) * | 1988-06-02 | 1989-03-01 | 同济大学 | Ultrasonic axial strero gauge |
| CN101158673A (en) * | 2007-11-16 | 2008-04-09 | 中国科学院力学研究所 | In-situ measurement probe |
| CN201901866U (en) * | 2010-09-30 | 2011-07-20 | 浙江大学 | T-shaped contact detector applied to deep-sea seabed feature testing |
| CN102879468A (en) * | 2012-09-18 | 2013-01-16 | 东北大学 | Double-bending-element ultrasonic sensing test device and method for evaluating rock damage |
Non-Patent Citations (1)
| Title |
|---|
| 南黄海中部海底沉积物剪切波速度测量及其与物理力学性质参数的关系;阚光明等;《海洋科学进展》;20140731;第32卷(第3期);全文 * |
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