CN108457310B - The application method of negative pressure control apparatus for barrel-shaped foundation sinking - Google Patents
The application method of negative pressure control apparatus for barrel-shaped foundation sinking Download PDFInfo
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- CN108457310B CN108457310B CN201810092153.1A CN201810092153A CN108457310B CN 108457310 B CN108457310 B CN 108457310B CN 201810092153 A CN201810092153 A CN 201810092153A CN 108457310 B CN108457310 B CN 108457310B
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- negative pressure
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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
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D23/00—Caissons; Construction or placing of caissons
- E02D23/08—Lowering or sinking caissons
- E02D23/10—Caissons filled with compressed air
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0053—Production methods using suction or vacuum techniques
Abstract
The present invention discloses a kind of application method of negative pressure control apparatus for barrel-shaped foundation sinking, negative pressure control apparatus includes vacuum pump, subatmospheric storage tank and control system, device is by the negative pressure in electric contact vacuum meter measurement bucket foundation, and decide whether to open vacuum pump in conjunction with setting value, so as to guarantee the stabilization of bucket foundation internal negative pressure in long-time, stablize negative pressure by controlling the switch of vacuum pump, the volume of subatmospheric storage tank can suitably be reduced, lesser subatmospheric storage tank can also carry out fairly large bucket foundation negative pressure sinking test.The device of the invention structure is simple, saves space, can provide stable negative pressure for a long time, realize the advantages that automation control of negative pressure.
Description
The present patent application is parent application " a kind of negative pressure control apparatus and its application method for barrel-shaped foundation sinking "
Divisional application, parent application application No. is: 2016109866808, the applying date are as follows: on November 9th, 2016.
Technical field
The present invention relates to a kind of experimental rigs of ocean engineering, more particularly to negative pressure during a kind of barrel-shaped foundation sinking
The application method of the experimental rig of automatic control.
Background technique
Mankind's in the 21st century, energy crisis becomes increasingly conspicuous, and wind energy on the sea becomes as a kind of reproducible clean energy resource
Alleviate the new direction of global energy anxiety situation.Bucket foundation is as a kind of novel offshore platform foundation form, substantially
A kind of plectane basis with skirtboard reduces project amount since it has, reduces investment outlay, shortens construction time, reusable etc.
Advantage, just gradually applied in the foundation engineering of offshore wind farm.Bucket foundation relies primarily on inside and outside differential pressure (negative pressure) and realizes sinking
In place, it is its outstanding feature for being different from traditional infrastructure, and realizes the premise of engineer application.As a kind of novel installation side
Formula, the applicating history that bucket foundation negative pressure sinks at home and abroad is shorter, and engineering experience is not abundant enough, therefore is badly in need of carrying out model examination
It tests, to instruct the theoretical research of bucket foundation.For bucket foundation in sinking watching, negative pressure not only provides injection pressure, Er Qiehui
Cause seepage flow, on the one hand seepage flow can reduce penetration resistance, on the other hand also will limit the size for applying negative pressure, because negative pressure is excessive
It will cause soil body penetration destruction, the use of bucket foundation influenced, so needing to study barrel-shaped foundation sinking mistake in model test
Apply the zone of reasonableness of negative pressure in journey；It is simultaneously the sinking watching for gaining more insight into bucket foundation, needs to negative pressure and sink
Soil pressure inside and outside depth, barrel, the relationship inside and outside barrel between pore water pressure, cylinder end resistance are studied.
Existing negative pressure cylinder sinking test equipment only includes vacuum pump and vacuum tank, and the mode for adjusting negative pressure is adjusted using artificial
It saves valve and closing vacuum pumps.Such experimental rig closes the valve between vacuum tank and bucket foundation before on-test,
The air inside vacuum tank is emptied using vacuum pump, manufactures vacuum environment；It, will be between vacuum pump and vacuum tank after on-test
Valve close, open the valve between vacuum tank and bucket foundation, it is metastable negative in bucket foundation internal invention with this
Pressure ring border, during the test, the vacuum magnitude inside bucket foundation is adjusted by valve.
Common negative pressure test device only relies on manual control switch's valve to control vacuum magnitude, therefore inside bucket foundation
Negative pressure is not accurate enough, and at the same time, the negative pressure inside bucket foundation can gradually be discharged with the time, when the prolonged model of progress
When test, negative pressure must be can decrease, and also can bring error to test result.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of negative pressure tests for barrel-shaped foundation sinking
The application method of device (i.e. control device) can tested according to the vacuum magnitude in setting automatic adjustment bucket foundation
Stable subnormal ambient is provided in journey, solves and needs large-scale negative pressure adjusting tank negative to store when carrying out the test of negative pressure sinking
Pressure, negative pressure instability problem caused by slow release during long-time is tested.
The present invention is achieved by the following technical solutions:
A kind of application method of the negative pressure test device for barrel-shaped foundation sinking, negative pressure test device includes vacuum pump；
It is adjusted by subatmospheric storage tank cover, connection bolt, subatmospheric storage tank, subatmospheric storage tank vacuum meter, subatmospheric storage tank entrance
The subatmospheric storage tank of valve and subatmospheric storage tank index combustion fan composition；By standard vacuum meter, standard vacuum meter inlet adjustment valve, mark
Quasi- vacuum meter index combustion fan, control panel total valve, electric contact vacuum meter inlet adjustment valve, electric contact vacuum meter, electric contact
It is vacuum meter index combustion fan, vacuum tube inlet adjustment valve, vacuum tube, drain valve, vacuum tube index combustion fan, control panel, true
Sky pump control cabinet, power supply indicator, vacuum pump switch, air switch, relay and the molecular control system of terminals；It is described
Vacuum pump passes through connecting line I respectively and connection circuit II is connected with the vacuum pump control cabinet of subatmospheric storage tank and control system,
Connecting line is equipped with subatmospheric storage tank inlet adjustment valve close to one end of subatmospheric storage tank cover, and subatmospheric storage tank cover is equipped with
Subatmospheric storage tank vacuum meter, subatmospheric storage tank cover are flexibly connected with subatmospheric storage tank by the connection bolt at both ends, are born
Pressure holding vessel is connected by connecting line II with the standard vacuum meter of control system, and connecting line II is close to subatmospheric storage tank one end
Equipped with subatmospheric storage tank index combustion fan, it is equipped with standard vacuum meter inlet adjustment valve close to one end of standard vacuum meter, standard is true
Empty table is connect by connecting line III with control panel total valve, and connecting line III is equipped with true in one end close to standard vacuum meter
Empty table index combustion fan, control panel total valve are connected by connecting line IV with electric contact vacuum meter, and connecting line IV is leaning on
One end of nearly electric contact vacuum meter is equipped with electric contact vacuum meter inlet adjustment valve, and electric contact vacuum meter is by connecting line V and very
Blank pipe is connected, and connecting line V is being equipped with electric contact vacuum meter index combustion fan close to electric contact vacuum meter one end, close to true
Blank pipe one end is equipped with vacuum tube inlet adjustment valve, and vacuum tube is connected by vacuum tube index combustion fan with external pipeline, vacuum tube
Lower section is equipped with drain valve, and electric contact vacuum meter is connected by connecting circuit I with vacuum pump control cabinet, and vacuum pump control cabinet is equipped with
Power supply indicator and vacuum pump switch, in vacuum pump control cabinet, external power supply is connected by connecting circuit III with air switch
It connects, air switch is connected by connecting circuit III with relay, and relay is connected by connecting circuit II with vacuum pump, and electricity connects
Point vacuum meter is connected by connection circuit I with connecting terminal, and connecting terminal is connected by connecting circuit V with relay；It should
Negative pressure test device carries out in the steps below when in use:
(1) whole piping connection is finished, test is connected with bucket foundation model with vacuum tube index combustion fan, in electricity
The upper limit and lower limit of negative pressure value are set on contact vacuum meter, and open subatmospheric storage tank inlet adjustment valve, standard vacuum table entry
It is regulating valve, standard vacuum meter index combustion fan, electric contact vacuum meter inlet adjustment valve, electric contact vacuum meter index combustion fan, true
Blank pipe inlet adjustment valve and vacuum tube index combustion fan close subatmospheric storage tank index combustion fan and drain valve；
(2) vacuum pump switch, vacuum pump work are opened, the vacuum degree in subatmospheric storage tank is gradually increased, stored up by negative pressure
The vacuum degree in tank vacuum meter observation subatmospheric storage tank is deposited, when the vacuum degree in subatmospheric storage tank is slightly larger than test requirements document negative pressure
After lower limit value, subatmospheric storage tank index combustion fan is opened；
(3) with the progress of test, negative pressure value is gradually increased, and after negative pressure value is higher than the upper limit of setting value, electric contact is true
Empty table closes vacuum pump switch by connection circuit, and vacuum pump stops working, increase and time with barrel-shaped foundation sinking amount
Growth, the negative pressure value inside experimental rig slowly reduces；After negative pressure value is lower than the lower limit of setting value, electric contact vacuum meter is logical
It crosses connection circuit and opens vacuum pump switch, vacuum pump is started to work, and the vacuum degree inside experimental rig is improved.
In the above-mentioned technical solutions, it finds that negative pressure setting value is unsatisfactory for experimental condition during the test, needs to increase
When adding or reducing the negative pressure value of experimental rig, change the upper and lower bound of negative pressure value on electric contact vacuum meter, by electric contact
Vacuum meter controls vacuum pump switch, increases or decreases the whole negative pressure value inside experimental rig.
In the above-mentioned technical solutions, the vacuum pump be sliding vane rotary vacuum pump, revolving speed be 1400 revs/min, pumping speed be 4 liters/
Second, rated power 0.55kW, ultimate vacuum reaches 6 × 10-2Pa。
In the above-mentioned technical solutions, the subatmospheric storage tank cover is shell structure, and diameter 30-40cm is highly
3-5cm；Subatmospheric storage tank is cylindrical structure, and diameter 30-40cm is highly 30-50cm.
In the above-mentioned technical solutions, the connecting line I, connecting line II, connecting line III, connecting line IV, company
Adapter tube road V is the plastic rigid pipe of caliber 4-8mm.
In the above-mentioned technical solutions, the subatmospheric storage tank inlet adjustment valve, subatmospheric storage tank index combustion fan, standard
Vacuum meter inlet adjustment valve, standard vacuum meter index combustion fan, electric contact vacuum meter inlet adjustment valve, the outlet of electric contact vacuum meter
Regulating valve, vacuum tube inlet adjustment valve, vacuum tube index combustion fan and drain valve are ball valve.
In the above-mentioned technical solutions, the electric contact vacuum meter voltage rating is 220V, and contact power is 10W, range
Range is ﹣ 0.1MPa；The range ability of standard vacuum meter is 760mm mercury.
Compared with prior art, the beneficial effects of the present invention are:
(1) device is the negative pressure measured in bucket foundation by electric contact vacuum meter, and decides whether to open in conjunction with setting value
Vacuum pump, so as to guarantee the stabilization of bucket foundation internal negative pressure in long-time.
(2) device stablizes negative pressure by controlling the switch of vacuum pump, can suitably reduce the volume of subatmospheric storage tank, compared with
Small subatmospheric storage tank can also carry out fairly large bucket foundation negative pressure sinking test.
Detailed description of the invention
Fig. 1 is the front view of experimental rig of the present invention；
Fig. 2 is the rearview of experimental rig of the present invention；
Fig. 3 is vacuum pump control cabinet schematic diagram of internal structure of the invention；
Wherein, 1, vacuum pump；2, connecting line I；3, subatmospheric storage tank inlet adjustment valve；4, subatmospheric storage tank cover；5,
Connect bolt；6, subatmospheric storage tank；7, subatmospheric storage tank vacuum meter；8, subatmospheric storage tank index combustion fan；9, connecting tube
Road II；10, standard vacuum meter inlet adjustment valve；11, standard vacuum meter；12, standard vacuum meter index combustion fan；13, connecting tube
Road III；14, control panel total valve；15, connecting line IV；16, electric contact vacuum meter inlet adjustment valve；17, electric contact vacuum
Table；18, electric contact vacuum meter index combustion fan；19, connecting line V；20, vacuum tube inlet adjustment valve；21, vacuum tube；22,
Drain valve；23, vacuum tube index combustion fan；24, control panel；25, vacuum pump control cabinet；26, power supply indicator；27, vacuum
Switch pump；28, circuit I is connected；29, circuit II is connected；30, circuit III is connected；31, air switch；32, circuit IV is connected；33,
Relay；34, circuit V is connected；35, connecting terminal.
It for those of ordinary skill in the art, without creative efforts, can be according to above attached
Figure obtains other relevant drawings.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, combined with specific embodiments below furtherly
Bright technical solution of the present invention.
A kind of negative pressure test device for barrel-shaped foundation sinking includes vacuum pump 1；By subatmospheric storage tank cover 4, connection
Bolt 5, subatmospheric storage tank 6, subatmospheric storage tank vacuum meter 7, subatmospheric storage tank inlet adjustment valve 3 and the outlet of subatmospheric storage tank
The subatmospheric storage tank that regulating valve 8 forms；By standard vacuum meter 11, standard vacuum meter inlet adjustment valve 10, standard vacuum meter outlet
Regulating valve 12, control panel total valve 14, electric contact vacuum meter inlet adjustment valve 16, electric contact vacuum meter 17, electric contact vacuum
Table index combustion fan 18, vacuum tube inlet adjustment valve 20, vacuum tube 21, drain valve 22, vacuum tube index combustion fan 23, control plane
Plate 24, vacuum pump control cabinet 25, power supply indicator 26, vacuum pump switch 27, air switch 31, relay 33 and connecting terminal 35
The control system of composition.The connection structure of system is: vacuum pump 1 passes through connecting line I 2 and connection circuit II 29 and negative pressure respectively
Holding vessel is connected with the vacuum pump control cabinet 25 of control system, and connecting line I 2 is equipped with negative close to one end of subatmospheric storage tank cover
Press holding vessel inlet adjustment valve 3, subatmospheric storage tank cover 4 be equipped with subatmospheric storage tank vacuum meter 7, subatmospheric storage tank cover 4 with
Subatmospheric storage tank 6 is flexibly connected by the connection bolt 5 at both ends, and subatmospheric storage tank is by connecting line II 9 and control
The standard vacuum meter 11 of system is connected, and connecting line II 9 is equipped with subatmospheric storage tank index combustion fan 8 close to subatmospheric storage tank one end,
It is equipped with standard vacuum meter inlet adjustment valve 10 close to one end of standard vacuum meter 11, standard vacuum meter 11 passes through connecting line III 13
It is connect with control panel total valve 14, connecting line III 13 is equipped with vacuum meter outlet regulating in one end close to standard vacuum meter 11
Valve 12, control panel total valve 14 are connected by connecting line IV 15 with electric contact vacuum meter 17, and connecting line IV 15 is close
One end of electric contact vacuum meter 17 is equipped with electric contact vacuum meter inlet adjustment valve 16, and electric contact vacuum meter 17 passes through connecting line V
19 are connected with vacuum tube 21, and connecting line V 19 is being equipped with electric contact vacuum meter outlet regulating close to 17 one end of electric contact vacuum meter
Valve 18 is being equipped with vacuum tube inlet adjustment valve 20 close to 21 one end of vacuum tube, and vacuum tube 21 passes through vacuum tube index combustion fan 23
It is connected with external pipeline, drain valve 22 is equipped with below vacuum tube 21, electric contact vacuum meter 17 passes through connection circuit I 28 and vacuum pump
Control cabinet 25 is connected, and vacuum pump control cabinet 25 is equipped with power supply indicator 26 and vacuum pump switch 27, in vacuum pump control cabinet 25
It is interior, external power supply by connect circuit III 30 be connected with air switch 31, air switch 31 by connection circuit IV 32 and after
Electric appliance 33 is connected, and relay 33 is connected by connecting circuit II 29 with vacuum pump 1, and electric contact vacuum meter 17 passes through connection circuit
I 28 are connected with connecting terminal 35, and connecting terminal 35 is connected by connecting circuit V 34 with relay 33, electric contact vacuum meter
17 start or stop vacuum pump 1 by control relay 33.
The negative pressure experimental provision carries out in the steps below when in use:
(1) whole piping connection is finished first, test bucket foundation model is connected with vacuum tube index combustion fan 23
It connects, the upper limit and lower limit of negative pressure value is set on electric contact vacuum meter, and it is true to open subatmospheric storage tank inlet adjustment valve 3, standard
Empty table entry regulating valve 10, standard vacuum meter index combustion fan 12, electric contact vacuum meter inlet adjustment valve 16, electric contact vacuum meter
Index combustion fan 18, vacuum tube inlet adjustment valve 20 and vacuum tube index combustion fan 23 close subatmospheric storage tank index combustion fan 8
With drain valve 22.
(2) vacuum pump switch 27, vacuum pump work are opened, the vacuum degree in subatmospheric storage tank gradually increases, and passes through negative pressure
Holding vessel vacuum meter 7 observes the vacuum degree in subatmospheric storage tank, when the vacuum degree in subatmospheric storage tank is negative slightly larger than test requirements document
After the lower limit value of pressure, subatmospheric storage tank index combustion fan 8 is opened.
(3) negative pressure value at this time in experimental rig should be slightly bigger than the lower limit that negative pressure value is set on electric contact vacuum meter 17, very
Sky pump 1 is still in open state, and with the progress of test, negative pressure value is gradually increased, when negative pressure value is higher than the upper limit of setting value
Afterwards, electric contact vacuum meter 17 will close vacuum pump switch 27 by connection circuit, and vacuum pump 1 stops working, with bucket foundation
The increase of deflection and the growth of time, the negative pressure value inside experimental rig will will be slow reduction；When negative pressure value is lower than setting value
Lower limit after, electric contact vacuum meter 17 will pass through connection circuit open vacuum pump switch 27, vacuum pump 1 start to work, improve examination
Vacuum degree inside experiment device, so as to circulate back and forth automatic stabilisation experimental rig internal negative pressure is achieved the purpose that.
Discovery negative pressure setting value is unsatisfactory for experimental condition during the test, needs to increase or decrease the negative of experimental rig
When pressure value, change the upper and lower bound of negative pressure value on electric contact vacuum meter 17, vacuum pump is controlled by electric contact vacuum meter 17 and is opened
27 are closed, the whole negative pressure value inside experimental rig is increased or decreased, to achieve the purpose that change test negative pressure.
Above-mentioned vacuum pump is sliding vane rotary vacuum pump, and revolving speed is 1400 revs/min, and pumping speed is 4 liters/second, and rated power is
0.55kW, ultimate vacuum reach 6 × 10-2Pa。
Above-mentioned subatmospheric storage tank cover is shell structure, and diameter 35cm is highly 4cm；Subatmospheric storage tank tube body 6 is
Cylindrical structure, diameter 35cm are highly 34cm.
Above-mentioned connecting line I 2, connecting line II 9, connecting line III 13, connecting line IV 15, connecting line V 19 are equal
For the plastic rigid pipe of caliber 6mm.
Above-mentioned subatmospheric storage tank inlet adjustment valve 3, subatmospheric storage tank index combustion fan 8, vacuum meter inlet adjustment valve 10,
Vacuum meter index combustion fan 12, electric contact vacuum meter inlet adjustment valve 16, electric contact vacuum meter index combustion fan 18, vacuum tube enter
Mouth regulating valve 20, vacuum tube index combustion fan 23 and drain valve 22 are ball valve.
Above-mentioned electric contact vacuum meter voltage rating is 220V, and contact power is 10W, and range ability is -0.1MPa.Standard
The range ability of vacuum meter is 760mm mercury.
Vacuum pump of the invention is connected by connecting line with subatmospheric storage tank, and subatmospheric storage tank expands single unit system
Volume, keep negative pressure relatively stable, significant change will not be generated in a short time.Subatmospheric storage tank passes through connecting line and control
Panel is attached, and the negative pressure value in measurement connecting line can be implemented in the electric contact vacuum meter in control panel, works as negative pressure value
After setting value, electric contact vacuum meter will open vacuum pump switch by connection circuit, and vacuum pump is started to work, and improve test
Vacuum degree inside device；After negative pressure value is higher than setting value, vacuum pump stops working, with the increase of barrel-shaped foundation sinking amount
With the growth of time, the vacuum degree inside experimental rig will will be slow reduction, negative inside experimental rig so as to circulate back and forth reaching
The automatic control of pressure.
Illustrative description has been done to the present invention above, it should explanation, the case where not departing from core of the invention
Under, any simple deformation, modification or other skilled in the art can not spend the equivalent replacement of creative work equal
Fall into protection scope of the present invention.
Claims (7)
1. a kind of application method of the negative pressure test device for barrel-shaped foundation sinking, it is characterised in that: negative pressure test device packet
Include vacuum pump；By subatmospheric storage tank cover, connection bolt, subatmospheric storage tank, subatmospheric storage tank vacuum meter, subatmospheric storage tank
The subatmospheric storage tank of inlet adjustment valve and subatmospheric storage tank index combustion fan composition；By standard vacuum meter, standard vacuum table entry
Regulating valve, standard vacuum meter index combustion fan, control panel total valve, electric contact vacuum meter inlet adjustment valve, electric contact vacuum
Table, electric contact vacuum meter index combustion fan, vacuum tube inlet adjustment valve, vacuum tube, drain valve, vacuum tube index combustion fan, control
Panel, vacuum pump control cabinet, power supply indicator, vacuum pump switch, air switch, relay and the molecular control of terminals processed
System；The vacuum pump passes through connecting line I respectively and connects the vacuum pump control of circuit II and subatmospheric storage tank and control system
Case processed is connected, and connecting line is equipped with subatmospheric storage tank inlet adjustment valve, subatmospheric storage tank close to one end of subatmospheric storage tank cover
It is living by the connection bolt at both ends that cover is equipped with subatmospheric storage tank vacuum meter, subatmospheric storage tank cover and subatmospheric storage tank
Dynamic connection, subatmospheric storage tank are connected by connecting line II with the standard vacuum meter of control system, and connecting line II is close to negative pressure
Holding vessel one end is equipped with subatmospheric storage tank index combustion fan, adjusts close to one end of standard vacuum meter equipped with standard vacuum table entry
Valve, standard vacuum meter are connect by connecting line III with control panel total valve, and connecting line III is close to standard vacuum meter
One end is equipped with vacuum meter index combustion fan, and control panel total valve is connected by connecting line IV with electric contact vacuum meter, connects
Pipeline IV is equipped with electric contact vacuum meter inlet adjustment valve in one end close to electric contact vacuum meter, and electric contact vacuum meter passes through connection
Pipeline V is connected with vacuum tube, and connecting line V is being equipped with electric contact vacuum meter outlet regulating close to electric contact vacuum meter one end
Valve is being equipped with vacuum tube inlet adjustment valve close to vacuum tube one end, and vacuum tube passes through vacuum tube index combustion fan and external pipeline
It is connected, drain valve is equipped with below vacuum tube, electric contact vacuum meter is connected by connecting circuit I with vacuum pump control cabinet, vacuum pump
Control cabinet be equipped with power supply indicator and vacuum pump switch, in vacuum pump control cabinet, external power supply by connection circuit III with
Air switch is connected, and air switch is connected by connecting circuit IV with relay, and relay passes through connection circuit II and vacuum
Pump is connected, electric contact vacuum meter by connect circuit I be connected with connecting terminal, connecting terminal by connection circuit V and after
Electric appliance is connected；The negative pressure test device carries out in the steps below when in use:
(1) whole piping connection is finished, test is connected with bucket foundation model with vacuum tube index combustion fan, in electric contact
The upper limit and lower limit of negative pressure value are set on vacuum meter, and open subatmospheric storage tank inlet adjustment valve, the adjusting of standard vacuum table entry
Valve, standard vacuum meter index combustion fan, electric contact vacuum meter inlet adjustment valve, electric contact vacuum meter index combustion fan, vacuum tube
Inlet adjustment valve and vacuum tube index combustion fan close subatmospheric storage tank index combustion fan and drain valve；
(2) vacuum pump switch, vacuum pump work are opened, the vacuum degree in subatmospheric storage tank gradually increases, and passes through subatmospheric storage tank
Vacuum meter observes the vacuum degree in subatmospheric storage tank, when the vacuum degree in subatmospheric storage tank is slightly larger than the lower limit of test requirements document negative pressure
After value, subatmospheric storage tank index combustion fan is opened；
(3) with the progress of test, negative pressure value is gradually increased, after negative pressure value is higher than the upper limit of setting value, electric contact vacuum meter
Vacuum pump switch is closed by connection circuit, vacuum pump stops working, with the increase of barrel-shaped foundation sinking amount and the increasing of time
Long, the negative pressure value inside experimental rig slowly reduces；After negative pressure value is lower than the lower limit of setting value, electric contact vacuum meter passes through company
It connects circuit and opens vacuum pump switch, vacuum pump is started to work, and the vacuum degree inside experimental rig is improved.
2. a kind of application method of negative pressure test device for barrel-shaped foundation sinking according to claim 1, feature
It is: finds that negative pressure setting value is unsatisfactory for experimental condition during the test, need to increase or decrease experimental rig
When negative pressure value, change the upper and lower bound of negative pressure value on electric contact vacuum meter, vacuum pump switch controlled by electric contact vacuum meter,
Increase or decrease the whole negative pressure value inside experimental rig.
3. a kind of application method of negative pressure test device for barrel-shaped foundation sinking according to claim 1, feature
Be: the vacuum pump be sliding vane rotary vacuum pump, revolving speed be 1400 revs/min, pumping speed be 4 liters/second, rated power 0.55kW,
Ultimate vacuum reaches 6 × 10-2Pa。
4. a kind of application method of negative pressure test device for barrel-shaped foundation sinking according to claim 1, feature
Be: the subatmospheric storage tank cover is shell structure, and diameter 30-40cm is highly 3-5cm；Subatmospheric storage tank
For cylindrical structure, diameter 30-40cm is highly 30-50cm.
5. a kind of application method of negative pressure test device for barrel-shaped foundation sinking according to claim 1, feature
Be: the connecting line I, connecting line II, connecting line III, connecting line IV, connecting line V are caliber 4-8mm
Plastic rigid pipe.
6. a kind of application method of negative pressure test device for barrel-shaped foundation sinking according to claim 1, feature
It is: the subatmospheric storage tank inlet adjustment valve, subatmospheric storage tank index combustion fan, standard vacuum meter inlet adjustment valve, mark
Quasi- vacuum meter index combustion fan, electric contact vacuum meter inlet adjustment valve, electric contact vacuum meter index combustion fan, vacuum tube inlet tune
Saving valve, vacuum tube index combustion fan and drain valve is ball valve.
7. a kind of application method of negative pressure test device for barrel-shaped foundation sinking according to claim 1, feature
Be: the electric contact vacuum meter voltage rating is 220V, and contact power is 10W, and range ability is ﹣ 0.1MPa；Standard is true
The range ability of empty table is 760mm mercury.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810092153.1A CN108457310B (en) | 2016-10-26 | 2016-11-09 | The application method of negative pressure control apparatus for barrel-shaped foundation sinking |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610948206 | 2016-10-26 | ||
| CN201610986680.8A CN106436786B (en) | 2016-10-26 | 2016-11-09 | A kind of experimental rig of control barrel-shaped foundation sinking negative pressure |
| CN201810092153.1A CN108457310B (en) | 2016-10-26 | 2016-11-09 | The application method of negative pressure control apparatus for barrel-shaped foundation sinking |
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| CN201610986680.8A Division CN106436786B (en) | 2016-10-26 | 2016-11-09 | A kind of experimental rig of control barrel-shaped foundation sinking negative pressure |
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| CN108457310A CN108457310A (en) | 2018-08-28 |
| CN108457310B true CN108457310B (en) | 2019-10-11 |
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| CN201810092153.1A Active CN108457310B (en) | 2016-10-26 | 2016-11-09 | The application method of negative pressure control apparatus for barrel-shaped foundation sinking |
| CN201621223229.2U Withdrawn - After Issue CN206174012U (en) | 2016-10-26 | 2016-11-09 | Be used for submerged negative -pressure control device of bucket foundation |
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| CN106436786B (en) * | 2016-10-26 | 2018-08-10 | 天津大学 | A kind of experimental rig of control barrel-shaped foundation sinking negative pressure |
| CN108761044B (en) * | 2018-08-13 | 2023-06-20 | 重庆科技学院 | Test device and method for microorganism-induced calcium carbonate precipitation solidification sand under negative pressure environment |
| CN110397093A (en) * | 2019-07-08 | 2019-11-01 | 天津大学 | A kind of negative pressure control apparatus and its application method of adjustable bucket foundation sinking rate |
| CN115030238A (en) * | 2022-06-13 | 2022-09-09 | 中交上海港湾工程设计研究院有限公司 | Vacuum preloading loading test device and method |
| CN116679768B (en) * | 2023-07-26 | 2023-10-31 | 江苏道达风电设备科技有限公司 | Method and related device for controlling negative pressure in offshore cylindrical foundation cylinder |
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|---|---|---|---|---|
| JP3446647B2 (en) * | 1999-02-09 | 2003-09-16 | 株式会社大林組 | Construction method of underwater foundation structure using caisson frame and underbody for underwater foundation structure |
| CN101798822B (en) * | 2010-03-09 | 2012-02-22 | 三一电气有限责任公司 | Sinking or floating control method and device of multi-chamber barrel-shaped base |
| CN103195110B (en) * | 2013-03-29 | 2015-02-11 | 天津大学 | Stable bucket-shaped foundation sinking negative pressure testing device |
| CN103452095B (en) * | 2013-08-19 | 2015-07-15 | 河海大学 | Frequency-conversion control adjustable vacuum device of main and auxiliary pumps for water discharging of sludge and using method of frequency-conversion control adjustable vacuum device |
| CN104652502B (en) * | 2015-01-12 | 2016-05-04 | 浙江大学 | Oscillatory type suction type barrel base levelling device |
| KR101707180B1 (en) * | 2015-04-02 | 2017-02-15 | 한국해양과학기술원 | Suction foundation with enhanced self weight penetration and construction method thereof |
| CN106436786B (en) * | 2016-10-26 | 2018-08-10 | 天津大学 | A kind of experimental rig of control barrel-shaped foundation sinking negative pressure |
-
2016
- 2016-11-09 CN CN201610986680.8A patent/CN106436786B/en active Active
- 2016-11-09 CN CN201810092153.1A patent/CN108457310B/en active Active
- 2016-11-09 CN CN201621223229.2U patent/CN206174012U/en not_active Withdrawn - After Issue
Also Published As
| Publication number | Publication date |
|---|---|
| CN106436786A (en) | 2017-02-22 |
| CN206174012U (en) | 2017-05-17 |
| CN106436786B (en) | 2018-08-10 |
| CN108457310A (en) | 2018-08-28 |
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