CN104568599A - 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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- CN104568599A CN104568599A CN201510024358.2A CN201510024358A CN104568599A CN 104568599 A CN104568599 A CN 104568599A CN 201510024358 A CN201510024358 A CN 201510024358A CN 104568599 A CN104568599 A CN 104568599A
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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 consolidometer, be specifically related to load consolidometer for a kind of negative pressure of vacuum of saturated soil cylindrical sample in Geotechnical Engineering, malleation and heat integration.
Technical background
The Soft Soil Districts such as China's Beijing-Tianjin Circum-Bohai Sea, the Yangtze River Delta, Pearl River Delta carries 50% population, 65%GDP and 90% total import and export value, and land resource is very in short supply.Adopting the ultra-soft soil such as vacuum preloading method process blowing-filling sludge to expand land area, is the method that a lot of coastal cities are conventional at present.But blowing-filling sludge infiltration coefficient is little, cause the process duration longer, the people such as Abuel-Naga (2006) propose thermovacuum preloading method first, find that consolidation time shortens 2/3 compared with traditional vacuum method, final settlement improves 25 ~ 30%, effect highly significant.
But, carrying out in temperature controlled consolidation test to saturated soil cylindrical sample at present, only achieve the loading that malleation load is coupled with temperature, also there is not the consolidation device under negative pressure of vacuum, temperature and the coupling of malleation load, therefore the consolidation characteristics of soil sample under high temperature, normal temperature and vacuum load coupling condition can not be analyzed.Along with the needs of constructing under various extreme condition, under temperature load effect, the research of saturated soil hot consolidation characteristic becomes a necessary problem.
Summary of the invention
The defect of consolidation experiment under vacuum load and temperature load coupling can not be carried out for conventional consolidation experiment, the object of the present invention is to provide a kind of negative pressure of vacuum, malleation and heat integration to load consolidometer.Its maximum feature to provide vacuum load and transformation temperature load, also can provide outside malleation load.It can meet saturated soil hot consolidation experiment under the positive press loading effect in different vacuum level, temperature load and outside.
The technical solution used in the present invention is:
The present invention is equipped with pulley at operating platform top of the trellis, wire rope strides across pulley, in operating platform frame, one end of wire rope is connected with the upper weight tray that upper counterweight is housed, housing upper plate is connected by connecting link with housing lower plate, transmission rod is fixed on housing upper plate, housing lower plate center is installed in one end of counterweight connecting link, the other end of counterweight connecting link is connected with the lower weight tray that lower counterweight is housed, the other end of wire rope is connected with one end of transmission rod, and one end of transmission rod contacts with one end of piston; Piston and pressure chamber cylinder form sliding pair, first permeable stone, soil examination happy and auspicious second permeable stone are housed in the pressure chamber cylinder of piston base successively, pore water pressure measured hole and GDS hole is provided with between the second permeable stone and pressure chamber base, heating system cylinder is set outside pressure chamber, tubular electric boiling plate is set between heating system cylinder and pressure chamber cylinder, electric boiling plate and electroheat pair are connected to temperature controller, and vacuum pump is connected with the hole that vacuumizes of piston axis through connecting pipe.
Described connecting pipe is clear hard plastic tube, and indicates scale, has the water of the consolidation draining amount for measuring soil sample in pipe.
Multiple rubber ring of piston is provided with between described piston and pressure chamber cylinder.
Described pressure chamber cylinder bottom surface and pressure chamber base junction are provided with rubber ring.
Described transmission rod end is circular arc convex shape, and pistons end is arc depression shape.
The beneficial effect that the present invention has is:
(1) pressure chamber's temperature-controllable changes within the scope of 20 ~ 90 DEG C;
(2) the vacuum load of 0 ~-80kPa scope can be provided;
(3) accurate, uninfluenced malleation can be provided to load, load scope is 0 ~ 100kg;
(4) deflection that can produce during Accurate Measurement hot consolidation and pore water pressure change.
Accompanying drawing explanation
Fig. 1 is experimental provision overall schematic.
Fig. 2 is experimental pressure room enlarged diagram.
In figure: 1, pulley, 2, wire rope, 3, upper counterweight, 4, upper weight tray, 5, transmission rod, 6, housing upper plate, 7, electric boiling plate, 8, connecting link, 9, housing lower plate, 10, counterweight connecting link, 11, lower counterweight, 12, lower weight tray, 13, operating platform frame, 14, vacuumize hole, 15, rubber ring of piston, 16, pressure chamber cylinder, 17, rubber ring, 18, pore water pressure measured hole, 19, piston, 20, pressure chamber's top cover, 21, bolt, 22, GDS hole, 23, pressure chamber base, 24, electroheat pair, 25, cover plate, 26, heating system cylinder, 27, permeable stone, 28, vacuum pump, 29, connecting pipe, .
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As Fig. 1, shown in Fig. 2, the present invention is equipped with pulley 1 at operating platform frame 13 top, wire rope 2 strides across pulley 1, in operating platform frame 13, one end of wire rope 2 is connected with the upper weight tray 4 that upper counterweight 3 is housed, housing upper plate 6 is connected by connecting link 8 with housing lower plate 9, transmission rod 5 is fixed on housing upper plate 6, housing lower plate 9 center is installed in one end of counterweight connecting link 10, the other end of counterweight connecting link 10 is connected with the lower weight tray 12 that lower counterweight 11 is housed, the other end of wire rope 2 is connected with one end of transmission rod 5, one end of transmission rod 5 contacts with one end of piston 19, piston 19 and pressure chamber cylinder 16 form sliding pair, first permeable stone, soil examination happy and auspicious second permeable stone are housed in the pressure chamber cylinder 16 bottom piston 19 successively, pore water pressure measured hole 18 and GDS hole 22 is provided with between the second permeable stone and pressure chamber base 23, heating system cylinder 26 is set outside pressure chamber, tubular electric boiling plate 7 is set between heating system cylinder 26 and pressure chamber cylinder 16, electric boiling plate 7 and electroheat pair 24 are connected to temperature controller, and vacuum pump 28 is connected with the hole 14 that vacuumizes of piston 19 axis through connecting pipe 29.
Described connecting pipe 29 is clear hard plastic tubes, and indicates scale, has the water of the consolidation draining amount for measuring soil sample in pipe.When evacuated, according to the connecting pipe 29 middle water level measure of the change amount of vacuumizing, thus vacuum load can be applied to sample and realize indirect inspection sample decrement.
Multiple rubber ring of piston 15 is provided with between described piston 19 and pressure chamber cylinder 16.
Described pressure chamber cylinder 16 bottom surface and pressure chamber base 23 junction are provided with rubber ring 17.
Described transmission rod 5 end is circular arc convex shape, and piston 19 end is arc depression shape.
Principle of work of the present invention:
Put permeable stone 27 at pressure chamber's upper and lower pad that sample is housed, by above-mentioned install device after, first increase lower counterweight 11 and apply certain vertical load, then heat and open temperature load and the 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 distortion can according to connecting pipe 29 SEA LEVEL VARIATION indirect inspection, and pore water pressure is measured by the pore water pressure measured hole 18 of pressure chamber base 23.Thus achieve the experiment of the negative pressure of vacuum of saturated soil, malleation and heat integration consolidation.
Above-mentioned embodiment is used for explaining and the present invention is described, instead of limits the invention, and in the protection domain of spirit of the present invention and claim, any amendment make the present invention and change, all fall into protection scope of the present invention.
Claims (5)
1. a negative pressure of vacuum, malleation and heat integration load consolidometer, it is characterized in that: at operating platform frame (13) top, pulley (1) is housed, wire rope (2) strides across pulley (1), in operating platform frame (13), one end of wire rope (2) is connected with the upper weight tray (4) that upper counterweight (3) is housed, housing upper plate (6) is connected by connecting link (8) with housing lower plate (9), transmission rod (5) is fixed on housing upper plate (6), housing lower plate (9) center is installed in one end of counterweight connecting link (10), the other end of counterweight connecting link (10) is connected with the lower weight tray (12) that lower counterweight (11) is housed, the other end of wire rope (2) is connected with one end of transmission rod (5), one end of transmission rod (5) contacts with one end of piston (19), piston (19) and pressure chamber cylinder (16) form sliding pair, in the pressure chamber cylinder (16) of piston (19) bottom, the first permeable stone is housed successively, happy and auspicious second permeable stone of soil examination, pore water pressure measured hole (18) and GDS hole (22) are provided with between the second permeable stone and pressure chamber base (23), heating system cylinder (26) is set outside pressure chamber, tubular electric boiling plate (7) is set between heating system cylinder (26) and pressure chamber cylinder (16), electric boiling plate (7) and electroheat pair (24) are connected to temperature controller, vacuum pump (28) is connected through the hole (14) that vacuumizes that connecting pipe (29) is axial with piston (19).
2. a kind of negative pressure of vacuum according to claim 1, malleation and heat integration load consolidometer, it is characterized in that: described connecting pipe (29) is clear hard plastic tube, and indicates scale having the water of the consolidation draining amount for measuring soil sample in pipe.
3. a kind of negative pressure of vacuum according to claim 1, malleation and heat integration load consolidometer, it is characterized in that: be provided with multiple rubber ring of piston (15) between described piston (19) and pressure chamber cylinder (16).
4. a kind of negative pressure of vacuum according to claim 1, malleation and heat integration load consolidometer, it is characterized in that: described pressure chamber cylinder (16) bottom surface and pressure chamber base (23) junction are provided with rubber ring (17).
5. a kind of negative pressure of vacuum according to claim 1, malleation and heat integration load consolidometer, and it is characterized in that: described transmission rod (5) end is circular arc convex shape, piston (19) end is arc depression shape.
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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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| CN201510024358.2A CN104568599B (en) | 2015-01-19 | 2015-01-19 | Vacuum negative pressure/positive pressure/heat combined loading consolidation apparatus |
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| CN104568599B CN104568599B (en) | 2017-04-12 |
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Cited By (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 |
| CN107764645A (en) * | 2017-10-09 | 2018-03-06 | 中国矿业大学 | A kind of experimental rig of large scale clay high pressure consolidation |
| CN109270109A (en) * | 2018-08-16 | 2019-01-25 | 温州大学 | Soft clay hot consolidation experimental model device |
| CN109959553A (en) * | 2019-03-15 | 2019-07-02 | 浙江大学 | Consolidation-infiltration-shear wave velocity coupling experiment 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 |
| CN114166645A (en) * | 2022-02-14 | 2022-03-11 | 潍坊学院 | Indoor soil body negative pressure consolidation device |
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Cited By (10)
| 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 |
| CN107764645A (en) * | 2017-10-09 | 2018-03-06 | 中国矿业大学 | A kind of experimental rig of large scale clay high pressure consolidation |
| CN107764645B (en) * | 2017-10-09 | 2021-05-07 | 中国矿业大学 | Large-size clay high-pressure consolidation test device |
| CN109270109A (en) * | 2018-08-16 | 2019-01-25 | 温州大学 | Soft clay hot consolidation experimental model device |
| CN109270109B (en) * | 2018-08-16 | 2021-07-30 | 温州大学 | Soft clay thermal consolidation experimental model device |
| CN109959553A (en) * | 2019-03-15 | 2019-07-02 | 浙江大学 | Consolidation-infiltration-shear wave velocity coupling experiment 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 |
| CN114166645A (en) * | 2022-02-14 | 2022-03-11 | 潍坊学院 | Indoor soil body negative pressure consolidation device |
| CN114166645B (en) * | 2022-02-14 | 2022-04-12 | 潍坊学院 | Indoor soil body negative pressure consolidation device |
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