CN104652499A - Experiment device and experiment method for simulating barrel-shaped foundation suction penetration process - Google Patents
Experiment device and experiment method for simulating barrel-shaped foundation suction penetration process Download PDFInfo
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- CN104652499A CN104652499A CN201510066262.2A CN201510066262A CN104652499A CN 104652499 A CN104652499 A CN 104652499A CN 201510066262 A CN201510066262 A CN 201510066262A CN 104652499 A CN104652499 A CN 104652499A
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- tank body
- experimental
- tank
- soil sample
- suction penetration
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
Abstract
The invention discloses an experiment device for simulating a barrel-shaped foundation suction penetration process. The device comprises a tank body, a tank cover, a water supply device and a water collecting box, wherein the tank body and the tank cover are correspondingly and respectively provided with a flange; an observing window is formed in each of the tank body and the tank cover; a soil sample is arranged in the tank body; a water-outlet pipe of which the pipe mouth is shaped like a hopper is buried in the soil sample and is connected with a draining pipe arranged on the lower part of the tank body; the draining pipe is sequentially connected with a flow meter, a pressure meter, a valve and the water collecting box; a barrel-shaped foundation experiment model with a displacement tester is arranged above the soil sample; a water-inlet pipe connected with the water supply device is also arranged on the upper part of the tank body and is provided with a vale and a pressure meter; a vent with a valve is also arranged on the tank cover. The experiment device has the advantages of reasonable design, high reliability, simple and quick operation, high expansibility and the like.
Description
Technical field
The present invention relates to ocean engineering model experimental technique field, in particular, relating to a kind ofly sink for simulating barrel base the bath scaled model experimental device passing through negative pressure process.
Background technology
Bohai Sea of China, the East Sea and South China Sea are richly stored with oil and natural gas resource, and along with the continuous rising of domestic energy demand, China is just having high input the amount of measuring one's own ability exploitation offshore oil and gas resource.Especially in recent years, deep-sea oil gas development technique becomes focus gradually, and due to by the restriction of development cost, scientific research personnel is devoted to research and develop the more efficient and form of structure of economy.As traditional base form, pile foundation, because its steel quantity consumption is large, piling difficulty is high, the feature of long construction period, is difficult to the demand adapting to deep-sea oil gas exploitation.
The barrel base adopting suction penetration is current a kind of novel base form, there is its easy construction, can reuse, lower-cost feature, be particularly useful for deep-sea soft foundation, thus well can be applicable to the deep-sea platform such as tension leg platform (TLP), SPAR platform.The research in past more concentrates on the bearing capacity aspect of bucket foundations, not yet has comparatively deep result of study for the suction penetration process of barrel base and mechanism.Study a question for this, carrying out Reduced-scale model experiment is a kind of important research means.
Summary of the invention
The object of the invention is to overcome deficiency of the prior art, a kind of experimental facilities for simulating Suction Penetration For Bucket Foundations process and experimental technique are provided, the present invention utilizes nature head pressure reduction to simulate negative pressure, the heavy experimentation that passes through exempts from pump suction, all can accomplish real time record and research to the process and mechanism of suction penetration; In conjunction with the experimental technique that the present invention proposes, carry out Reduced-scale model experiment effectively to simulate heavy under different water depth, negative pressure and soil condition of various forms of barrel base and pass through process and percolation phenomenon, for theory calculate and engineer applied provide experimental basis, therefore the present invention has the advantages such as reasonable in design, reliability is strong, simple and easy quick, favorable expandability.
The object of the invention is to be achieved through the following technical solutions:
A kind of experimental facilities of simulating Suction Penetration For Bucket Foundations process, described device comprises the corresponding tank body being provided with flange and cover, waterworks and header tank, described tank body and cover are provided with observation port, described tank interior is provided with soil sample, it is funnelform outlet pipe that described soil sample is embedded with the mouth of pipe, described outlet pipe is connected with the gutter being arranged on tank body lower part, and described gutter is connected with flowmeter, pressure meter, valve and header tank in turn; The barrel base experimental model with displacement measurement instrument is placed with above described soil sample, described tank body top is also provided with the water inlet pipe be connected with waterworks, described water inlet pipe is provided with valve and pressure meter, described cover is also provided with the valvular exhaust opening of band.
Described waterworks comprise and are arranged on storage tank above tank body and the valvular water-supply-pipe of band.
The steel drum that described tank body is 1.6m by high and diameter is formed.
The top of described barrel base experimental model is also provided with water tester.
Symmetrically on described tank body be provided with 5 observation ports.
Described observation port is the evagination cylindrical-shaped structure of flange, glass and O-ring seal composition.
The funnel-shaped nozzle of described outlet pipe flushes with the height of soil sample.
Described tank base and cover are also provided with the crossyard for ruggedized construction and stringers.
Described cover is also provided with hanger.
Simulate an experimental technique for Suction Penetration For Bucket Foundations process, comprise the following steps:
(1) and requirement of experiment theoretical according to scaling factor, makes barrel base experimental model, calculates related experiment parameter, draft planning of experiments;
(2) in experimental tank, fill soil sample, add water formation saturated soil, and leave standstill make soil sample consolidation;
(3) lay barrel base experimental model, make it sink to passing through until stable at Gravitative Loads;
(4) close cover by flange seal, connects waterworks and header tank, fill water, complete Preparatory work of experiment in tank body;
(5) according to predetermined planning of experiments, suction penetration experiment is carried out, record experimental data.
Compared with prior art, the beneficial effect that technical scheme of the present invention is brought is:
1. apparatus of the present invention and method all simulate actual marine environment, provide tank body and water supply and drainage device that soil sample is housed, effectively can simulate heavy under different water depth, negative pressure and soil condition of various forms of barrel base model and pass through process and percolation phenomenon.
3. the water inlet pipe in the present invention and gutter are provided with pressure meter and valve, gutter is also provided with pressure meter, therefore experiment can be carried out respectively by regulating the mode of head pressure reduction or control flow velocity, thus simulate heavy passing through and the pressure boundary condition in flow event and flow fringe conditions, make to utilize nature head pressure reduction to simulate negative pressure in experiment overall process, the heavy experimentation that passes through exempts from pump suction, has reliability, novelty and advance.
4. in the present invention by being arranged on observation port on tank body and cover and other various table meters, seepage flow head pressure reduction can be obtained, the heavy degree of depth of passing through passes through the real time data such as speed, seepage discharge with heavy, electronic pressure gauge and electronic grout flow meter can be adopted to realize automation collection and the storage of experimental data simultaneously.
5. this apparatus structure is reasonable in design, experimental implementation simple, and the observation port of multi-faceted setting is convenient to whole the sinking of monitoring in real time and is passed through process.
6. extensibility of the present invention is good, improves the bearing capacity experiment and the research such as anti-pulling test that can carry out various barrel base model a little.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of tank body and cover in the present invention.
Reference numeral: 4-observation port 5-water inlet pipe 6-valve 7-pressure meter 8-gutter 9-flowmeter 10-pressure meter 11-valve 12-cover 13-flange 14-transverse and longitudinal purlin, 1-tank body 2-flange 3-transverse and longitudinal purlin 15-observation port 16-hanger 17-exhaust opening 18-soil sample 19-barrel base experimental model 20-outlet pipe 21-storage tank 22-water-supply-pipe 23-valve 24-header tank 25-valve 26-displacement measurement instrument
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
As depicted in figs. 1 and 2: a kind of experimental facilities of simulating Suction Penetration For Bucket Foundations process, described device comprises tank body 1 and cover 12, the steel drum that tank body 1 is 1.6m by high and diameter is made, the upper opening place of tank body 1 is provided with flange 2, bottom is provided with the reinforcement structure of transverse and longitudinal purlin 3 and serves as steel pedestal, the front tank skin of tank body 1 is provided with 5 observation ports 4, wherein three observation port 4 vertical compact arrangement in alignment, observation port 4 is symmetrical is distributed in both sides for two other.
The left upper portion of tank body 1 is provided with water inlet pipe 5, water inlet pipe 5 is provided with valve 6 and pressure meter 7; Soil sample 18 is equipped with in the inside of tank body 1, barrel base experimental model 19 is placed in the centre position of soil sample 18, the top of barrel base experimental model 19 is provided with displacement measurement instrument 26, in addition can experimentally demand, and in the top of barrel base experimental model 19, hydraulic pressure colour photometer is installed in outside; Soil sample 18 is embedded with outlet pipe 20, and the mouth of pipe of outlet pipe 20 is leak shape, highly flushes with the soil sample 18 in tank body 1, and is connected to the gutter 8 of tank body 1 bottom setting, gutter 8 is provided with successively flowmeter 9, pressure meter 10 and valve 11.
Cover 12 is provided with the flange 13 corresponding with flange 2, be provided with O-ring seal in addition for sealing experiment tank body 1, cover 12 top is also provided with the reinforcement structure of transverse and longitudinal purlin 14, be provided with the exhaust opening 17 with valve 25 and the hanger 16 being convenient to lift in addition, the central authorities of cover 12 are also provided with observation port 15, observation port 4 in the present invention and observation port 15 are the cylindrical-shaped structure of evagination, and form by flange, high strength glass and O-ring seal.
Apparatus of the present invention also comprise waterworks and header tank 24, and waterworks are formed by the storage tank 21 be arranged on above tank body 1 with the water-supply-pipe 22 of valve 23, and water-supply-pipe 22 is connected with water inlet pipe 5; Header tank 24 is connected with gutter 8, and wherein the height of the water inlet of header tank 24 flushes with the height of soil sample 18 in tank body 1.
Concrete operation step and the experimental technique of apparatus of the present invention are as follows:
1. and requirement of experiment theoretical according to scaling factor, make barrel base experimental model 19, head needed for experiment with computing and the parameter such as the water yield, each layer soil sample thickness, draft planning of experiments.
2. in top storage tank 21, inject enough water, install embedding outlet pipe 20, valve-off 11, in experimental tank 1, insert soil sample 18, topped up with water in experimental tank 1 also makes soil sample 18 form saturated soil, and standing a period of time makes soil sample 18 consolidation.
3. barrel base experimental model 19 is immersed in experiment tank body 1 in water, after the air in discharge barrel base experimental model 19, barrel base experimental model 19 is vertically positioned over soil sample 18 central mud face place gently, make it sink to passing through until stable at Gravitative Loads.
4. valve-off 6, is connected water-supply-pipe 22 with water inlet pipe 5, lifts and the flange seal cover 12 that closes, and flange 2 and flange 13 is tightened, open the valve 25 on exhaust opening 17 with screw.
5. opening valve 6 makes top storage tank 21 be communicated with experiment tank body 1, and to experimental tank 1 water filling until water overflows from exhaust opening 17, then valve-off 6 and valve 25, complete Preparatory work of experiment.
6. according to predetermined planning of experiments, open and control valve 6 and valve 11, make barrel base experimental model 19 sink to passing through at head differential pressure action.The data of interval record displacement tester 26, pressure meter 7, pressure meter 10, flowmeter 9 are until experiment all completes to schedule.
7. after having tested, valve-off 11 and valve 6, the cumulative volume of water in measuring set water tank 24, process experimental result.
Claims (10)
1. simulate the experimental facilities of Suction Penetration For Bucket Foundations process for one kind, it is characterized in that, described device comprises the corresponding tank body being provided with flange and cover, waterworks and header tank, described tank body and cover are provided with observation port, described tank interior is provided with soil sample, it is funnelform outlet pipe that described soil sample is embedded with the mouth of pipe, and described outlet pipe is connected with the gutter being arranged on tank body lower part, and described gutter is connected with flowmeter, pressure meter, valve and header tank in turn; The barrel base experimental model with displacement measurement instrument is placed with above described soil sample, described tank body top is also provided with the water inlet pipe be connected with waterworks, described water inlet pipe is provided with valve and pressure meter, described cover is also provided with the valvular exhaust opening of band.
2. a kind of experimental facilities of simulating Suction Penetration For Bucket Foundations process according to claim 1, is characterized in that, described waterworks comprise and are arranged on storage tank above tank body and the valvular water-supply-pipe of band.
3. a kind of experimental facilities of simulating Suction Penetration For Bucket Foundations process according to claim 1, is characterized in that, the steel drum that described tank body is 1.6m by high and diameter is formed.
4. a kind of experimental facilities of simulating Suction Penetration For Bucket Foundations process according to claim 1, is characterized in that, the top of described barrel base experimental model is also provided with water tester.
5. a kind of experimental facilities of simulating Suction Penetration For Bucket Foundations process according to claim 1, is characterized in that, symmetrically on described tank body is provided with 5 observation ports.
6. a kind of experimental facilities of simulating Suction Penetration For Bucket Foundations process according to claim 1 or 5, is characterized in that, described observation port is the evagination cylindrical-shaped structure of flange, glass and O-ring seal composition.
7. a kind of experimental facilities of simulating Suction Penetration For Bucket Foundations process according to claim 1, it is characterized in that, the funnel-shaped nozzle of described outlet pipe flushes with the height of soil sample.
8. a kind of experimental facilities of simulating Suction Penetration For Bucket Foundations process according to claim 1, is characterized in that, described tank base and cover is also provided with the crossyard for ruggedized construction and stringers.
9. a kind of experimental facilities of simulating Suction Penetration For Bucket Foundations process according to claim 1, is characterized in that, described cover is also provided with hanger.
10. simulate an experimental technique for Suction Penetration For Bucket Foundations process, it is characterized in that, comprise the following steps:
(1) and requirement of experiment theoretical according to scaling factor, makes barrel base experimental model, calculates related experiment parameter, draft planning of experiments;
(2) in experimental tank, fill soil sample, add water formation saturated soil, and leave standstill make soil sample consolidation;
(3) lay barrel base experimental model, make it sink to passing through until stable at Gravitative Loads;
(4) close cover by flange seal, connects waterworks and header tank, fill water, complete Preparatory work of experiment in tank body;
(5) according to predetermined planning of experiments, suction penetration experiment is carried out, record experimental data;
(6) experimental result is processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510066262.2A CN104652499A (en) | 2015-02-06 | 2015-02-06 | Experiment device and experiment method for simulating barrel-shaped foundation suction penetration process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510066262.2A CN104652499A (en) | 2015-02-06 | 2015-02-06 | Experiment device and experiment method for simulating barrel-shaped foundation suction penetration process |
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| CN104652499A true CN104652499A (en) | 2015-05-27 |
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| CN201510066262.2A Pending CN104652499A (en) | 2015-02-06 | 2015-02-06 | Experiment device and experiment method for simulating barrel-shaped foundation suction penetration process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108824498A (en) * | 2018-06-07 | 2018-11-16 | 中交第三航务工程局有限公司 | A kind of negative pressure tub basis self-pressing type anti-pulling capacity detection method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003268791A (en) * | 2002-02-14 | 2003-09-25 | Rund-Stahl-Bau Gmbh | Method for lowering floating body of floating foundation |
| CN103195110A (en) * | 2013-03-29 | 2013-07-10 | 天津大学 | Stable bucket-shaped foundation sinking negative pressure testing device |
-
2015
- 2015-02-06 CN CN201510066262.2A patent/CN104652499A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003268791A (en) * | 2002-02-14 | 2003-09-25 | Rund-Stahl-Bau Gmbh | Method for lowering floating body of floating foundation |
| CN103195110A (en) * | 2013-03-29 | 2013-07-10 | 天津大学 | Stable bucket-shaped foundation sinking negative pressure testing device |
Non-Patent Citations (1)
| Title |
|---|
| 李嘉文等: "张力腿平台整体式负压基础沉贯及抗拔模型实验", 《天津大学学报（自然科学与工程技术版）》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108824498A (en) * | 2018-06-07 | 2018-11-16 | 中交第三航务工程局有限公司 | A kind of negative pressure tub basis self-pressing type anti-pulling capacity detection method |
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Application publication date: 20150527 |