CN104568599B - Vacuum negative pressure/positive pressure/heat combined loading consolidation apparatus - Google Patents
Vacuum negative pressure/positive pressure/heat combined loading consolidation apparatus Download PDFInfo
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- CN104568599B CN104568599B CN201510024358.2A CN201510024358A CN104568599B CN 104568599 B CN104568599 B CN 104568599B CN 201510024358 A CN201510024358 A CN 201510024358A CN 104568599 B CN104568599 B CN 104568599B
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- 238000007596 consolidation process Methods 0.000 title claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 25
- 239000010959 steel Substances 0.000 claims abstract description 25
- 239000002689 soil Substances 0.000 claims abstract description 17
- 239000004575 stone Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 239000011148 porous material Substances 0.000 claims abstract description 9
- 230000010354 integration Effects 0.000 claims description 9
- 229920001971 elastomer Polymers 0.000 claims description 8
- 238000009835 boiling Methods 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 2
- 238000005485 electric heating Methods 0.000 abstract 1
- 229920006395 saturated elastomer Polymers 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 240000002853 Nelumbo nucifera Species 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 2
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a vacuum negative pressure/positive pressure/heat combined loading consolidation apparatus. A pulley is mounted at the top of an operating platform rack; a steel wire rope crosses the pulley, and one end of the steel wire rope is connected with an upper weight tray; a dowel bar is fixedly connected to an outer frame upper plate, while a weight connecting rod is mounted at the center of an outer frame lower plate and connected with a lower weight tray; the other end of the steel wire rope is connected with one end of the dowel bar; one end of the dowel bar is in contact with one end of a piston; a sliding pair is formed by the piston and a pressure chamber cylinder; porous stone, a soil test sample and porous stone are orderly mounted in the pressure chamber cylinder at the bottom of the piston; a pore water pressure measuring hole and a GDS hole are formed between the lower porous tone and a pressure chamber base; a cylindrical electric heating plate is arranged between a heating system cylinder and a pressure chamber cylinder; the vacuum pump is connected with a vacuumizing hole formed in the piston in the axial direction by use of a connecting pipe. The temperature of the pressure chamber of the vacuum negative pressure/positive pressure/heat combined loading consolidation apparatus is controlled within the range of 20-90 DEG C; the consolidation apparatus is capable of providing the vacuum loads ranging from 0 to 80kPa, and capable of measuring the deformation and the pore water pressure generated by consolidation.
Description
Technical field
The present invention relates to consolidation apparatus, and in particular to a kind of vacuum for saturated soil cylindrical sample in Geotechnical Engineering is born
Pressure, malleation and heat integration loading consolidation apparatus.
Technical background
The Soft Soil Districts such as China's Beijing-Tianjin Circum-Bohai Sea, the Yangtze River Delta, Pearl River Delta carry 50% population, the turnover of 65%GDP and 90%
Mouth total value, land resource are very in short supply.The ultra-softs such as blowing-filling sludge soil is processed using vacuum preloading method and expands land area, be mesh
The conventional method in front many coastal cities.However, blowing-filling sludge infiltration coefficient is little, cause the process duration longer, Abuel-Naga
Et al. (2006) propose thermal vacuum preloading method first, it is found that consolidation time shortens 2/3 compared with traditional vacuum method, finally
Sedimentation improves 25 ~ 30%, effect highly significant.
However, carrying out to saturated soil cylindrical sample in temperature controlled consolidation test at present, malleation lotus is only realized
Carry the loading coupled with both temperature, the consolidation device also not having under negative pressure of vacuum, temperature and malleation load coupling, therefore not
The consolidation characteristics of the soil sample under high temperature, room temperature and vacuum load coupling condition can be analyzed.With construction under various extreme conditions
Needs, the research of saturated soil thermosetting junction characteristic under temperature load effect becomes a necessary problem.
The content of the invention
Can not carry out under vacuum load and temperature load coupling, consolidating the defect of experiment for conventional consolidation experiment, this
The purpose of invention is to provide a kind of negative pressure of vacuum, malleation and heat integration loading consolidation apparatus.Its maximum feature is to provide true
Empty load and transformation temperature load, can also provide outside malleation load.It can meet saturated soil in different vacuum levels, temperature lotus
Carry and hot consolidation experiment under outside positive press loading effect.
The technical solution used in the present invention is：
The present invention is equipped with pulley in operating platform top of the trellis, and steel wire rope is across pulley, in operating platform frame, steel wire rope
One end is connected with the upper weight tray equipped with upper counterweight, and housing upper plate and housing lower plate are connected by connecting rod, and dowel steel is affixed
On housing upper plate, housing lower plate center is installed in one end of counterweight connecting rod, the other end of counterweight connecting rod with lower counterweight is housed
The connection of lower weight tray, the other end of steel wire rope is connected with one end of dowel steel, one end of dowel steel and one end phase of piston
Contact；Piston constitutes sliding pair with pressure chamber cylinder, and the first permeable stone, soil examination are sequentially arranged with the pressure chamber cylinder of piston base
Happy and auspicious second permeable stone, is provided with pore water pressure measured hole and GDS holes, pressure chamber peripheral hardware between the second permeable stone and pressure chamber base
Heating system cylinder is put, tubular electric boiling plate, electric boiling plate and electroheat pair are set between heating system cylinder and pressure chamber cylinder
Temperature controller is connected to, vacuum pump Jing connecting tubes are connected with the evacuation hole of piston axial direction.
The connecting tube is clear hard plastic tube, and indicates scale, is had for measuring the consolidation draining amount of soil sample in pipe
Water.
Multiple rubber ring of piston are provided between the piston and pressure chamber cylinder.
The pressure chamber cylinder bottom surface is provided with rubber ring with pressure chamber base junction.
The power transmission boom end is circular arc convex shape, and pistons end is arc depression shape.
The invention has the advantages that：
(1) pressure chamber temperature control changes in the range of 20 ~ 90 DEG C；
(2) the vacuum load of 0 ~ -80kPa scopes can be provided；
(3) accurate, uninfluenced malleation loading can be provided, load scope is 0 ~ 100kg；
(4) deflection that can be produced during accurately determining hot consolidation and pore water pressure change.
Description of the drawings
Fig. 1 is experimental provision overall schematic.
Fig. 2 is experimental pressure room enlarged diagram.
In figure：1st, pulley, 2, steel wire rope, 3, upper counterweight, 4, upper weight tray, 5, dowel steel, 6, housing upper plate, 7, electricity
Heating plate, 8, connecting rod, 9, housing lower plate, 10, counterweight connecting rod, 11, lower counterweight, 12, lower weight tray, 13, behaviour
Make paralell, 14, evacuation hole, 15, rubber ring of piston, 16, pressure chamber cylinder, 17, rubber ring, 18, pore water pressure
Measured hole, 19, piston, 20, pressure chamber top cover, 21, bolt, 22, GDS holes, 23, pressure chamber base, 24, electroheat pair,
25th, cover plate, 26, heating system cylinder, 27, permeable stone, 28, vacuum pump, 29, connecting tube,.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples.
As shown in Figure 1 and Figure 2, the present invention is equipped with pulley 1 at the top of operating platform frame 13, and steel wire rope 2 is being grasped across pulley 1
Make in paralell 13, one end of steel wire rope 2 be connected equipped with the upper weight tray 4 of upper counterweight 3, housing upper plate 6 and housing lower plate 9
Connected by connecting rod 8, dowel steel 5 is fixed on housing upper plate 6,9 center of housing lower plate is installed in one end of counterweight connecting rod 10,
The other end of counterweight connecting rod 10 is connected with the lower weight tray 12 equipped with lower counterweight 11, the other end and the dowel steel 5 of steel wire rope 2
One end connection, one end of dowel steel 5 is contacted with one end of piston 19；Piston 19 constitutes sliding pair with pressure chamber cylinder 16,
Be sequentially arranged with the first permeable stone, happy and auspicious second permeable stone of soil examination in the pressure chamber cylinder 16 of 19 bottom of piston, the second permeable stone with
Pore water pressure measured hole 18 and GDS holes 22 are provided between pressure chamber base 23, heating system cylinder 26, heating are set outside pressure chamber
Tubular electric boiling plate 7 is set between system cylinder 26 and pressure chamber cylinder 16, and electric boiling plate 7 and electroheat pair 24 are connected to temperature control
Device processed, 28 Jing connecting tubes 29 of vacuum pump are connected with the evacuation hole 14 of 19 axial direction of piston.
The connecting tube 29 is clear hard plastic tube, and indicates scale, is had for measuring the consolidation draining of soil sample in pipe
The water of amount.When evacuated, can be according to SEA LEVEL VARIATION measurement evacuation amount in connecting tube 29, so as to sample applying vacuum load
And realize measurement sample decrement indirectly.
Multiple rubber ring of piston 15 are provided between the piston 19 and pressure chamber cylinder 16.
16 bottom surface of the pressure chamber cylinder is provided with rubber ring 17 with 23 junction of pressure chamber base.
5 end of the dowel steel is circular arc convex shape, and 19 end of piston is arc depression shape.
The operation principle of the present invention：
Permeable stone 27 is put in the pressure chamber upper and lower pad equipped with sample, is installed after device by above-mentioned, first increase lower counterweight
11 apply certain vertical load, then heat and open temperature load and vacuum load that vacuum pump 28 applies requirement of experiment.
Under vacuum load, temperature load and external loads synergy, saturated soil sample consolidation.During consolidation, saturated soil sample deformation can
Measured according to 29 SEA LEVEL VARIATION of connecting tube indirectly, pore water pressure is surveyed by the pore water pressure measured hole 18 of pressure chamber base 23
Amount.It is achieved thereby that the negative pressure of vacuum of saturated soil, malleation and heat integration consolidation experiment.
Above-mentioned specific embodiment is used for illustrating the present invention, rather than limits the invention, the present invention's
In spirit and scope of the claims, any modifications and changes made to the present invention both fall within the protection model of the present invention
Enclose.
Claims (5)
1. a kind of negative pressure of vacuum, malleation and heat integration loads consolidation apparatus, it is characterised in that：In operating platform frame（13）Top is equipped with
Pulley（1）, steel wire rope（2）Across pulley（1）, in operating platform frame（13）It is interior, steel wire rope（2）One end be equipped with upper counterweight
（3）Upper weight tray（4）Connection, housing upper plate（6）With housing lower plate（9）By connecting rod（8）Connection, dowel steel（5）Gu
It is connected on housing upper plate（6）On, counterweight connecting rod（10）One end install housing lower plate（9）Center, counterweight connecting rod（10）It is another
One end be equipped with lower counterweight（11）Lower weight tray（12）Connection, steel wire rope（2）The other end and dowel steel（5）One end connect
Connect, dowel steel（5）One end and piston（19）One end contact；Piston（19）With pressure chamber cylinder（16）Constitute sliding pair,
Piston（19）The pressure chamber cylinder of bottom（16）First permeable stone, happy and auspicious second permeable stone of soil examination are sequentially arranged with inside, second is permeable
Stone and pressure chamber base（23）Between be provided with pore water pressure measured hole（18）With GDS holes（22）, heating system is set outside pressure chamber
Cylinder（26）, heating system cylinder（26）With pressure chamber cylinder（16）Between arrange tubular electric boiling plate（7）, electric boiling plate（7）
And electroheat pair（24）It is connected to temperature controller, vacuum pump（28）Jing connecting tubes（29）With piston（19）The evacuation hole of axial direction
（14）Connection.
2. a kind of negative pressure of vacuum according to claim 1, malleation and heat integration loads consolidation apparatus, it is characterised in that：It is described
Connecting tube（29）It is clear hard plastic tube, and indicates scale have in pipe for measuring the water of the consolidation draining amount of soil sample.
3. a kind of negative pressure of vacuum according to claim 1, malleation and heat integration loads consolidation apparatus, it is characterised in that：It is described
Piston（19）With pressure chamber cylinder（16）Between be provided with multiple rubber ring of piston（15）.
4. a kind of negative pressure of vacuum according to claim 1, malleation and heat integration loads consolidation apparatus, it is characterised in that：It is described
Pressure chamber cylinder（16）Bottom surface and pressure chamber base（23）Junction is provided with rubber ring（17）.
5. a kind of negative pressure of vacuum according to claim 1, malleation and heat integration loads consolidation apparatus, it is characterised in that：It is described
Dowel steel（5）End be circular arc convex shape, piston（19）End is arc depression shape.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510024358.2A CN104568599B (en) | 2015-01-19 | 2015-01-19 | Vacuum negative pressure/positive pressure/heat combined loading consolidation apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510024358.2A CN104568599B (en) | 2015-01-19 | 2015-01-19 | Vacuum negative pressure/positive pressure/heat combined loading consolidation apparatus |
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| CN104568599A CN104568599A (en) | 2015-04-29 |
| CN104568599B true CN104568599B (en) | 2017-04-12 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644746A (en) * | 2016-12-07 | 2017-05-10 | 山西省交通科学研究院 | Measurement device and method of consolidation and deformation of soil body under vacuum pre-pressing effect |
| CN107764645B (en) * | 2017-10-09 | 2021-05-07 | 中国矿业大学 | Large-size clay high-pressure consolidation test device |
| CN109270109B (en) * | 2018-08-16 | 2021-07-30 | 温州大学 | Soft clay thermal consolidation experimental model device |
| CN109959553B (en) * | 2019-03-15 | 2023-12-01 | 浙江大学 | Consolidation-permeation-shear wave velocity coupling experimental device |
| CN110736663A (en) * | 2019-10-25 | 2020-01-31 | 同济大学 | Test device for simulating soil sample submerged corrosion under different hydraulic gradients and vertical pressures |
| CN114166645B (en) * | 2022-02-14 | 2022-04-12 | 潍坊学院 | Indoor soil body negative pressure consolidation device |
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| CN102156076A (en) * | 2010-03-26 | 2011-08-17 | 中国科学院地质与地球物理研究所 | Method for measuring freeze thawing deformation of one-dimensional lateral limit loaded soil sample |
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| JPS60178334A (en) * | 1984-02-27 | 1985-09-12 | Hitachi Ltd | Material testing apparatus under high-temperature and high-pressure environment |
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