CN106404567A - Pile-soil simulating device and method under wave load - Google Patents
Pile-soil simulating device and method under wave load Download PDFInfo
- Publication number
- CN106404567A CN106404567A CN201610781290.7A CN201610781290A CN106404567A CN 106404567 A CN106404567 A CN 106404567A CN 201610781290 A CN201610781290 A CN 201610781290A CN 106404567 A CN106404567 A CN 106404567A
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- Prior art keywords
- pile
- wave
- top cover
- wave load
- cylindrical tube
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0244—Tests performed "in situ" or after "in situ" use
- G01N2203/0246—Special simulation of "in situ" conditions, scale models or dummies
Abstract
The invention discloses a pile-soil simulating device and method under a wave load. The device comprises a wave simulator, a plurality of pipes, and a model pile. The pipes are sequentially and axially connected to form a cylindrical pipe. The bottom of the cylindrical pipe is arranged on a base platform. The top of the cylindrical pipe is provided with a top cover. The model pipe is arranged in the cylindrical pipe. Fillers are filled between the model pipe and the internal wall of the cylindrical pipe. The wave simulator is connected to the top cover. The provided pile-soil simulating device can precisely simulate the mechanical characteristics of sea. By directly applying a simulated wave load on the water pressure of pores, accurate data can be obtained. Furthermore, the structure of the whole device is simple; the operation is convenient; the device can work for a long time, and can simulate many conditions of seabed and wave; the experiment material can be repeatedly used, the pollution is little, and the cost of single experiment is low.
Description
Technical field
The present invention relates to a kind of technology in engineering simulation field, stake soil analog under specifically a kind of wave load
And method.
Background technology
Pile foundation, as a kind of modal base form, is widely used in marine structure.But it is in land and ocean
Stress under environment is very different, and under the effect of long-term ocean environmental load, superstructure is the carrying energy of seabed soil
Power has different degrees of reduction.Wave load can produce larger circulation wave pressure in communication process on sea bed, this
Circulation wave pressure makes excess pore water pressure in sea bed be gradually increasing with the Circulation of wave and accumulate, and sea bed fatigue resistance is bright
Aobvious reduction.When accumulation excess pore water pressure develops into the degree suitable with total stress, seabed soil liquefies, ground gene
This loses bearing capacity.When seabed soil occurs liquefaction, the soil body weakens to the horizontally and vertically resistance of pile foundation, and pile foundation produces big change
Shape, in the presence of wave load and upper load, will occur overall structure to tilt to destroy.
At present, the lower pile foundation of ocean environmental loads effect is less with the research of the interaction of soil, lacks and effectively tests
Means.Field experimentation high cost, and oceanographic data is difficult measurement；Model test adopts cyclic load simulating ocean environment, plus
Carry precision not high it is impossible to the process of reflection seabed soil pore water pressure accumulation, its result is representative.
Content of the invention
The present invention is directed to prior art more difficult simulation mechanical characteristic under the marine environment such as wave for the seabed soil and cannot
Solve the problems, such as the dynamic response of wave-pile foundation-seabed soil, propose stake clay model under a kind of wave load and intend device and method, can
Mechanical characteristic in accurate simulation ocean, by directly loading simulation wave load on pore water pressure, draws accurate data.
The present invention is achieved by the following technical solutions：
The present invention relates to stake soil analog under a kind of wave load, including：Wave simulation device, some bodys and model
Stake, wherein：Body is axially connected to form cylindrical tube successively, and cylinder bottom of the tube is arranged on base platform, and cylindrical tube top is provided with
Top cover, Model Pile is arranged in cylindrical tube, is filled with implant, wave simulation device and top cover phase between Model Pile and cylinder inside pipe wall
Even.
Described wave simulation device includes：The water tank of air pressure control mechanism, air bag and sealing, wherein：Air bag is arranged at water
It is connected in case and with air pressure control mechanism, water tank is connected with top cover.
Described top cover is provided with three way cock, and this three way cock is connected with water tank by pipeline.
Described top cover is provided with water pressure gauge and seal plug.
Described seal plug is the screw thread that cylinder and outer peripheral face are provided with for being connected with top cover, and seal plug is axially arranged with
Three through holes.
Described Model Pile includes some cylinder pile bodies, and pile body is axially connected successively.
It is threaded connection between described pile body.
Described pile body outer wall is provided with the groove for install sensor.
It is provided with the collar for fixing adjacent tubes between described body, and be provided with for sealing between the collar and body
Sealing ring.
Described body lateral wall is provided with pore pressure meter.
The material of the described collar, pile body and body is all lucite.
The present invention relates to stake soil analogy method under a kind of wave load, comprise the following steps：
1) install sensor in Model Pile, penetrates wire and with epoxy resin to seal plug in the through hole of seal plug
Head makees water-proofing treatment；
2) some section bodys are assembled into cylindrical tube on demand, while assembling, Model Pile are put in cylindrical tube and load
Wire on seal plug is connected by implant afterwards with the sensor in Model Pile；
3) top cover is installed, and with anchor pole, top cover is anchored with base platform；
4) access wave simulation device, Model Pile and cylindrical tube inner stuffing are applied by constant pressure and continue 24h；
5) wave simulation device adjusts circulating pressure, frequency, carries out loading experiment measurement data.
Technique effect
Compared with prior art, simple structure of the present invention, easy to operate, energy long-play, the sea bed that can simulate, wave
Condition is many, experiment material repeat utilize, pollution less, single experiment low cost.
Brief description
Fig. 1 is overall schematic of the present invention；
Fig. 2 is cylindrical tube connection diagram；
Fig. 3 is pipe structure schematic diagram；
Fig. 4 is cap structure schematic diagram；
Fig. 5 is seal plug structural representation；
Fig. 6 is Model Pile structural representation；
Fig. 7 is experimental result comparison diagram；
In figure：1 cylindrical tube, 2 wave simulation devices, 3 Model Pile, 4 top covers, 5 base platforms, 6 data acquisition units, 7 water pressure gauges,
8 three way cock, 9 seal plugs, 101 bodys, 102 collars, 103 sealing rings, 104 pore pressure meters, 201 air pressure control mechanisms, 202 water
Case, 203 air bags, 301 pile bodies.
Specific embodiment
Below embodiments of the invention are elaborated, the present embodiment is carried out under premised on technical solution of the present invention
Implement, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following enforcements
Example.
Embodiment 1
As shown in figure 1, stake soil analog includes under wave load in the present embodiment：Wave simulation device 2, some bodys
101 and Model Pile 3, wherein：Body 101 is axially connected to form cylindrical tube 1 successively, and cylindrical tube 1 bottom is arranged at base platform 5
On, cylindrical tube 1 top is provided with top cover 4, and Model Pile 3 is arranged in cylindrical tube 1, is filled between Model Pile 3 and cylindrical tube 1 inwall
Implant, wave simulation device 2 is connected with top cover 4.
Described wave simulation device 2 includes：The water tank 202 of air pressure control mechanism 201, air bag 203 and sealing, wherein：Gas
Capsule 203 is arranged in water tank 202 and is connected with air pressure control mechanism 201, and water tank 202 is connected with top cover 4.Air pressure control mechanism
201 absorption gases at high pressure, and the gas after conveying controls in backward air bag 203, control circle by controlling the contraction of air bag 203
Column jecket 1 top water body pressure is with simulated waves.
As shown in Fig. 2 described cylindrical tube 1 finishes up to be connected by multiple hollow tubes 101 forming, it is provided between body 101
For fixing the collar 102 of adjacent tubes 101, and between the collar 102 and body 101, it is provided with the sealing ring 103 for sealing.Gu
The outer peripheral face at body two ends is provided with the groove for placing sealing ring 103.The material of body 101 and the collar 102 is all lucite,
The convenient implant observed in body 101 and Model Pile 3, typically using soil as implant.Body 101 lateral wall is provided with pore pressure
Meter 104.The a height of 20cm of body 101, internal diameter is 20.5cm, and external diameter is 21.5cm.
As shown in figure 3, body 101 inwall at described pore pressure meter 104 is provided with permeable stone, in terms of ensureing pore pressure 104
Accuracy.
As shown in figure 4, four angles of described top cover 4 are provided with rectangular indentation as connector, for the connection of anchor pole.Top
Lid 4 is provided with some installing holes, for installing water pressure gauge 7, three way cock 8 and seal plug 9.After top cover 4 installs, with
Base platform 5 passes through anchor pole and is connected, and whole cylindrical tube is compressed.
As shown in figure 5, described seal plug 9 is the screw thread that cylinder and outer peripheral face are provided with for being connected with top cover 4, seal
Plug 9 is axially arranged with three for the through hole that wire passes through, and the top of screw thread is provided with rubber ring.
As shown in fig. 6, the pile body 301 that described Model Pile 3 is made up of some lucites passes through, and screw thread is connected to be formed.Should
Pile body 301 is respectively arranged at the two ends with the threaded connector of protrusion and the slotted eye that matches with threaded connector.Each pile body 301 outer wall is provided with
Groove for install sensor.This sensor can be pore pressure meter 104, foil gauge and displacement transducer etc..On pile body 301
Sensor and the pore pressure meter 104 of body 101 outer wall be all connected with data acquisition unit 6, data acquisition unit 6 obtains on after data
The brain that conducts electricity carries out further Data Management Analysis.
Under the wave load of application said apparatus, stake soil analogy method, comprises the following steps：
1) install sensor in Model Pile 3, penetrates wire and with epoxy resin to sealing in the through hole of seal plug 9
Plug 9 makees water-proofing treatment；
2) some section bodys 101 are assembled into cylindrical tube 1 on demand, while assembling, Model Pile 3 are put into cylindrical tube 1 simultaneously
Wire on seal plug 9 is connected by dress soil afterwards with the sensor in Model Pile 3；
3) top cover 4 is installed, and with anchor pole, top cover 4 is anchored with base platform 5；
4) access wave simulation device 2, constant pressure is applied to soil in Model Pile 3 and cylindrical tube 1 and continues 24h；
5) wave simulation device 2 adjusts circulating pressure, frequency, carries out loading experiment measurement data.
As shown in fig. 7, to the experimental data in the case of no stake with Jeng D S in paper Porous Models for
Economics analysis solution in Wave seabed Interactions compares, with the feasibility of experimental device for verifying.Experiment medium wave
Unrestrained cycle T=9S, wave height H=3.5m, depth of water d=5.2m, native coefficient of permeability K=0.00018m/s, the sand of simulation sea bed is cut
Shear modulu G=1.27 × 107N/m2, Poisson's ratio μ=0.3, porosity n '=0.425, saturation S=0.996, sea bed depth h=
1.759m, load cycle-index is 3000 times.Pore water pressure maximum amplification value (| p |/p0) that record experiment and Theory Solution
Contrast is it can be seen that experimental result is met with Theory Solution.It can be seen that sea bed under this experimental provision energy simulated waves load action
Response, therefore this experimental simulation device and method are used for the response to sea bed for Model Pile 3 base.
Compared with prior art, the present invention can intuitively observe sea bed surface under load action fluctuate situation, can see
To sea bed surface liquefaction phenomenon it is also possible to by data collection and analysis study further sea bed liquefaction distribution situations such as；Load
It is convenient to change, and can change the frequency of wave load simulated, peak value, meansigma methodss etc., thus reaching a series of simulation difference loads
The response of lower stake implant；Joined by the level changing implant, the condition such as degree of compaction, to realize stake filling under different seabed conditions
The simulation of thing response；Model Pile and implant can reuse, single experiment low cost.
Claims (9)
1. under a kind of wave load stake soil analog it is characterised in that include：Wave simulation device, some bodys and Model Pile,
Wherein：Body is axially connected to form cylindrical tube successively, and cylinder bottom of the tube is arranged on base platform, and cylindrical tube top is provided with top
Lid, Model Pile is arranged in cylindrical tube, is filled with implant, wave simulation device and top cover phase between Model Pile and cylinder inside pipe wall
Even；
Described wave simulation device includes：The water tank of air pressure control mechanism, air bag and sealing, wherein：Air bag is arranged in water tank
And be connected with air pressure control mechanism, water tank is connected with top cover.
2. stake soil analog under wave load according to claim 1, is characterized in that, described top cover is provided with three and connects
Head, three way cock is connected with water tank by pipeline, and top cover is provided with water pressure gauge and seal plug.
3. stake soil analog under wave load according to claim 2, is characterized in that, described seal plug is cylinder
And outer peripheral face is provided with the screw thread for being connected with top cover, seal plug is axially arranged with three through holes.
4. stake soil analog under wave load according to claim 1, is characterized in that, described Model Pile includes some
Cylindrical pile body, pile body is axially connected successively.
5. stake soil analog under wave load according to claim 4, is characterized in that, passes through spiral shell between described pile body
Stricture of vagina connects.
6. stake soil analog under wave load according to claim 5, is characterized in that, described pile body outer wall is provided with use
Groove in install sensor.
7. stake soil analog under wave load according to claim 1, is characterized in that, be provided with use between described body
In the collar of fixing adjacent tubes, and between the collar and body, it is provided with the sealing ring for sealing.
8. stake soil analog under wave load according to claim 7, is characterized in that, described body lateral wall is provided with
Pore pressure meter.
9. stake soil analogy method under a kind of wave load, comprises the following steps：
1) install sensor in Model Pile, penetrates wire in the through hole of seal plug and with epoxy resin, seal plug is made
Water-proofing treatment；
2) some section bodys are assembled into cylindrical tube on demand, while assembling, Model Pile are put in cylindrical tube and load filling
Wire on seal plug is connected by thing afterwards with the sensor in Model Pile；
3) top cover is installed, and with anchor pole, top cover is anchored with base platform；
4) access wave simulation device, Model Pile and cylindrical tube inner stuffing are applied by constant pressure and continue 24 hours；
5) wave simulation device adjusts circulating pressure, frequency, carries out loading experiment measurement data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610781290.7A CN106404567A (en) | 2016-08-31 | 2016-08-31 | Pile-soil simulating device and method under wave load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610781290.7A CN106404567A (en) | 2016-08-31 | 2016-08-31 | Pile-soil simulating device and method under wave load |
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| CN106404567A true CN106404567A (en) | 2017-02-15 |
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ID=58001156
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| CN201610781290.7A Pending CN106404567A (en) | 2016-08-31 | 2016-08-31 | Pile-soil simulating device and method under wave load |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706442A (en) * | 2017-03-05 | 2017-05-24 | 南京大学 | Testing device and testing method for testing normal contact stress of pile-soil interface under variable temperature condition |
| CN107100211A (en) * | 2017-05-11 | 2017-08-29 | 同济大学 | A kind of experimental rig of the pile-soil interaction in full size stake footpath |
| CN108051319A (en) * | 2017-11-15 | 2018-05-18 | 河海大学 | The construction method of sticky soil body viscoelastic-plastic constitutive model under periodic sinusoidal vibration load |
| CN108086369A (en) * | 2018-02-11 | 2018-05-29 | 广东工业大学 | Pile soil common action displacement stress measuring device under a kind of difference socket length |
| CN108088651A (en) * | 2018-01-25 | 2018-05-29 | 西南交通大学 | Potential of Seabed Under Wave Loading dynamic response experimental facilities and analogue experiment method |
| CN108267370A (en) * | 2018-01-31 | 2018-07-10 | 浙江大学 | A kind of one-dimensional cylinder test device and method for simulating the kinetic head boundary effect soil body |
| CN108343095A (en) * | 2018-01-16 | 2018-07-31 | 上海交通大学 | The experimental rig and method of static pressure pile-sinking in the simulation saturation soil body |
| CN108387710A (en) * | 2018-01-31 | 2018-08-10 | 浙江大学 | A kind of experimental rig and method for simulating the rectangle head boundary effect soil body |
| CN108507756A (en) * | 2017-11-17 | 2018-09-07 | 浙江工业大学 | Wave square shaped pile imposed load research device and its test method |
| CN108593513A (en) * | 2018-01-31 | 2018-09-28 | 浙江大学 | A kind of experimental rig and method for simulating the dynamic artesian water effect soil body |
| CN108760541A (en) * | 2018-06-27 | 2018-11-06 | 中国海洋大学 | A kind of soil body dynamic test device |
| CN115407047A (en) * | 2022-08-08 | 2022-11-29 | 河海大学 | Experimental device and experimental method for indoor simulation of soil liquefaction |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706442A (en) * | 2017-03-05 | 2017-05-24 | 南京大学 | Testing device and testing method for testing normal contact stress of pile-soil interface under variable temperature condition |
| CN107100211A (en) * | 2017-05-11 | 2017-08-29 | 同济大学 | A kind of experimental rig of the pile-soil interaction in full size stake footpath |
| CN107100211B (en) * | 2017-05-11 | 2019-01-25 | 同济大学 | A kind of experimental rig of the interaction between pile and soil of full size stake diameter |
| CN108051319A (en) * | 2017-11-15 | 2018-05-18 | 河海大学 | The construction method of sticky soil body viscoelastic-plastic constitutive model under periodic sinusoidal vibration load |
| CN108051319B (en) * | 2017-11-15 | 2019-07-23 | 河海大学 | Periodic sinusoidal vibrates the construction method of sticky soil body viscoelastic-plastic constitutive model under load |
| CN108507756A (en) * | 2017-11-17 | 2018-09-07 | 浙江工业大学 | Wave square shaped pile imposed load research device and its test method |
| CN108343095A (en) * | 2018-01-16 | 2018-07-31 | 上海交通大学 | The experimental rig and method of static pressure pile-sinking in the simulation saturation soil body |
| CN108343095B (en) * | 2018-01-16 | 2019-10-29 | 上海交通大学 | The experimental rig and method of static pressure pile-sinking in the simulation saturation soil body |
| CN108088651A (en) * | 2018-01-25 | 2018-05-29 | 西南交通大学 | Potential of Seabed Under Wave Loading dynamic response experimental facilities and analogue experiment method |
| CN108088651B (en) * | 2018-01-25 | 2024-02-06 | 西南交通大学 | Seabed dynamic response experimental equipment under wave action and simulation experimental method |
| CN108387710A (en) * | 2018-01-31 | 2018-08-10 | 浙江大学 | A kind of experimental rig and method for simulating the rectangle head boundary effect soil body |
| CN108267370A (en) * | 2018-01-31 | 2018-07-10 | 浙江大学 | A kind of one-dimensional cylinder test device and method for simulating the kinetic head boundary effect soil body |
| CN108593513A (en) * | 2018-01-31 | 2018-09-28 | 浙江大学 | A kind of experimental rig and method for simulating the dynamic artesian water effect soil body |
| CN108086369A (en) * | 2018-02-11 | 2018-05-29 | 广东工业大学 | Pile soil common action displacement stress measuring device under a kind of difference socket length |
| CN108086369B (en) * | 2018-02-11 | 2023-09-12 | 广东工业大学 | Device and method for measuring pile soil combined action displacement stress under different rock-socketed depths |
| CN108760541A (en) * | 2018-06-27 | 2018-11-06 | 中国海洋大学 | A kind of soil body dynamic test device |
| CN115407047A (en) * | 2022-08-08 | 2022-11-29 | 河海大学 | Experimental device and experimental method for indoor simulation of soil liquefaction |
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Application publication date: 20170215 |