CN104596817B - The large-scale reshaped clay of vapour-pressure type makes and one-dimensional consolidation experiment coupled system - Google Patents

The large-scale reshaped clay of vapour-pressure type makes and one-dimensional consolidation experiment coupled system Download PDF

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Publication number
CN104596817B
CN104596817B CN201510013848.2A CN201510013848A CN104596817B CN 104596817 B CN104596817 B CN 104596817B CN 201510013848 A CN201510013848 A CN 201510013848A CN 104596817 B CN104596817 B CN 104596817B
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China
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sleeve
cover
pressure
scale
hole
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CN201510013848.2A
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CN104596817A (en
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�谷川�
曹树刚
张婷婷
王鹏
王军
郭林
蔡袁强
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温州大学
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Abstract

Made the invention discloses a kind of large-scale reshaped clay of vapour-pressure type and one-dimensional consolidation experiment coupled system, can be used for the large scale cylinder sample of remolded cohesive soil in Geotechnical Engineering or hollow cylinder sample makes, can also be used for the one-dimensional consolidation experiment of large-scale clay sample, the instrument includes displacement measurement system, combined pressure chamber, pore pressure measuring system, displacement of volume measuring system, air pressure loading system, axial stiffening member.The instrument is loaded by air pressure, pressurization stabilization, it is uniform, can survey, it is controllable, and on-load pressure is up to 1.6 more than MPa, efficiently solves the shortcoming that counterweight loading is difficult to apply high pressure;The instrument is used as vertical drainage passage by embedding vertical metal permeable stone on rigid transparent sleeve, overcomes traditional shortcoming that consolidation device drainage channel is single, consolidation rate is slow;The pressure chamber rigid transparent sleeve of the instrument, with visuality, overcomes the not visible shortcoming of traditional consolidation apparatus.

Description

The large-scale reshaped clay of vapour-pressure type makes and one-dimensional consolidation experiment coupled system

Technical field

Made the present invention relates to a kind of large-scale reshaped clay of vapour-pressure type and one-dimensional consolidation experiment coupled system, the device is rock Geotechnological journey sample preparation device, belongs to Geotechnical Engineering measuring instrument manufacturing technology field, it is adaptable to make large-scale reshaped clay sample, especially It is the hollow cylinder clay sample in hollow torsion shear test.

Background technology

Geotechnical testament is the Main Means for obtaining soil body physical and mechanical parameter, National Standard of the People's Republic of China《Geotechnique Test method standard》(GB/T 50123-1999)It is the guide specifications on geotechnical testament in China's prospecting, design field. In geotechnical testament, the acquisition and preparation of sample are the first steps of geotechnical testament, while be also a most important step, if sample Not science, specification are prepared, then the various physical and mechanical parameters for measuring afterwards just lack credibility, and are possible to further surveying Examine, design, constructing and play misleading effect.Meanwhile, in terms of scientific research, the indoor unit of the soil body tests requirement to sample more Height, preparation science, superior, specification a sample are often the successful half of experimental study.

Soil body sample generally comprises undisturbed sample, disturbance soil sample and remolding soil specimens.《Soil test method mark It is accurate》(GB/T 50123-1999)In simply describe undisturbed sample and disturbance soil sample preparation method.Manipulated soil is a kind of Soil sample between undisturbed soil and disturbed soil, it is by disturbed soil, by the experiment soil of artificial.It detailed Definition can be expressed as:Manipulated soil is moulded by manually autotelic, with emulation undisturbed soil soil body outward appearance fundamental characteristics Disturbed soil structure, is a kind of experiment soil body for being applied to certain test purpose.At present, based on the reason for following two aspects, Manipulated soil is in geotechnical testament using more and more frequent:First, in some cases, it is difficult to obtain undisturbed soil, or obtain into This is too high, and can cause excessive test error if geotechnical testament is carried out instead of undisturbed soil using complete disturbed soil; Secondly, in scientific research, it is often necessary to which test result is contrasted, therefore it is required that test soil sample has preferable uniformity And comparativity, and the uniformity of remolding soil specimens and comparativity are substantially better than undisturbed sample and disturbance soil sample.

Meanwhile, with the development of geotechnological instrument, more and more geotechnological instruments need the sample of special shape, wherein most generation Table is hollow cylinder sample needed for hollow torsion shear test.This volume of sample is larger, if made by undisturbed soil It is then very cumbersome and difficult into sample, method is smash etc. by hitting of advising in specification make and be then difficult to meet saturation degree, uniformity Etc. aspect requirement, therefore a kind of instrument that can directly make hollow cylinder sample is needed badly, to meet the hollow torsion for increasing increasingly Scissor test requirement.

The research of overconsolidated soil is currently increasing.Natural overconsolidated soil carries very big contingency and region, It is difficult to obtain, it is therefore desirable to manual manufacture overconsolidated soil.Manual manufacture overconsolidated soil needs to be carried out in tester before, flower Take plenty of time, and effect on driving birds is not good.

The content of the invention

The technical problems to be solved by the invention be to provide a kind of draining it is more smooth, with visual and experimental precision more The large-scale reshaped clay of vapour-pressure type high makes and one-dimensional consolidation experiment coupled system.

Made the invention provides a kind of large-scale reshaped clay of vapour-pressure type and one-dimensional consolidation experiment coupled system, including rigidity Transparent sleeve, base and top cover, the rigid transparent sleeve are configured with vertically arranged vertical permeable stone, the rigid transparent set The upper bush groove grafting that is opened up on the lower surface of upper end and the top cover of cylinder is simultaneously sealed under cooperations, lower end be embedded on base upper surface In sleeve groove and seal cooperation;The space that top cover, rigid transparent sleeve and base are surrounded is divided into top by trapping end board Air chamber and the loading chamber of bottom, trapping end board lower section are configured with horizontal permeable stone;It is fixed on the board of the trapping end to connect Connect a rigid link, rigid link protrudes upward the top cover by the rigid link through hole on top cover, the rigid link to On the part stretched out upper end board is installed, vertical rigid link coordinates with through hole dynamic sealing;The outer layer rigid transparent sleeve Surrounding is provided with axial grip component, and axial grip component accommodates clamping force and promotes rigid transparent sleeve to be pushed up to top cover and base Lid and bottom seat is clamped and fixed;The top cover upper surface is provided with fixed displacement meter and air admission hole, the measurement of the fixed displacement meter End is against on the upper end board, and the air admission hole is connected by valve with pressue device;Exhaust is additionally provided with the top cover Hole and pressure tap, pressure tap are connected by valve with air pressure measuring apparatus, on the base with axle center as origin from inside to outside Multiple circle rhones are sequentially distributed, circular rhone is separated into four parts, the base by right-angled intersection drain groove Sidepiece is provided with pore pressure measured hole, base plate osculum and the standby hole of base plate, and the pore pressure measured hole, base plate osculum and base plate are standby Turned on loading chamber described in Kong Junyu, the base plate osculum passes through the external aqueduct of valve and hole water volume measuring device; The pore pressure measured hole passes through the external hole water-pressure survey device of valve, the circular rhone of the base and right-angled intersection draining Groove is connected with the base plate osculum.

The large-scale reshaped clay of vapour-pressure type that the present invention is provided is made and one-dimensional consolidation experiment coupled system is carried out by air pressure Loading, pressurization stabilization, it is uniform, can survey, it is controllable, it is to avoid traditional counterweight load mode easily receives external interference, cumbersome, poor controllability The shortcomings of, and on-load pressure is up to 1.6 more than MPa, efficiently solves the shortcoming that counterweight loading is difficult to apply high pressure;The instrument Device is used as vertical drainage passage by embedding vertical metal permeable stone on rigid transparent sleeve, overcomes traditional consolidation device draining The shortcoming that passage is single, consolidation rate is slow;The pressure chamber rigid transparent sleeve of the instrument, with visuality, overcomes tradition solid The not visible shortcoming of knot instrument.

Brief description of the drawings:

Fig. 1 makes and one-dimensional consolidation experiment coupling for the large-scale reshaped clay of vapour-pressure type that the first embodiment of the invention is provided The structural representation of system

Fig. 2 is that the large-scale reshaped clay making in Fig. 1 and one-dimensional consolidation test section view of the coupled system along base plate center line Schematic diagram.

Fig. 3 makes and one-dimensional consolidation experiment coupled system edge for the large-scale reshaped clay that second embodiment of the invention is provided The schematic cross-sectional view of base plate center line.

Fig. 4 is the structural representation of the base in Fig. 1.

Fig. 5 is the structural representation of the top cover in Fig. 1.

Fig. 6 is the structural representation at the back side of Fig. 5.

Fig. 7 is the structural representation of the trapping end board with rigid link in Fig. 2.

Fig. 8 is the structural representation of the trapping end board with rigid link in Fig. 3.

Fig. 9 is the assembled state dimensional structure diagram of the outer sleeve, middle sleeve and inner sleeve in Fig. 2.

Figure 10 is the structural representation of the toroidal transverse direction permeable stone in Fig. 2.

Figure 11 is the structural representation of the ring-shaped transverse direction permeable stone in Fig. 3.

Specific embodiment

Preferred example combination detailed description of the invention is as follows:

The present invention makes and one-dimensional consolidation experiment coupled system for a kind of large-scale reshaped clay of vapour-pressure type, implements process of the test In can as requested make the sample of different shape, size.The present invention can make large scale cylinder sample, and can be used for into one Step makes the sample of reduced size, the cuboid sample such as in true triaxial test, the cylinder sample in Dynamic triaxial test etc..Simultaneously The present invention can be used to make hollow cylinder sample, and can carry out cylinder torsional shear experiment through simple cutting.The embodiment of the present invention One makes for large scale cylinder sample, and embodiment two makes for hollow cylinder sample.

Embodiment one

Referring to shown in Fig. 1, Fig. 2, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 9, Figure 10, a kind of vapour-pressure type that the present invention is provided is large-scale heavy Plastic clay makes and one-dimensional consolidation experiment coupled system, including rigid transparent sleeve, base 1 and top cover 2, the rigid transparent set Cylinder is configured with vertically arranged vertical permeable stone 3, and what is opened up on the upper end of the rigid transparent sleeve and the lower surface of top cover 2 is upper The grafting of sleeve groove 4 is simultaneously sealed in cooperation, the lower sleeve groove 5 on insertion base 1 upper surface of lower end and seals cooperation, upper bush groove 4 It is that elastic tape is laid in toroidal cavity, groove, the lower sleeve groove 5 is that elastic tape is laid in toroidal cavity, groove;Trapping The space that top cover 2, rigid transparent sleeve and base 1 are surrounded is divided into the air chamber on top and the loading chamber of bottom, institute by end board 6 State the lower section of trapping end board 6 and be configured with horizontal permeable stone 7, rigid transparent sleeve is the outer sleeve 8 in periphery in the present embodiment, Trapping end board 6 and horizontal permeable stone 7 are in the circle matched with outer sleeve;It is fixedly connected on trapping end board 6 One rigid link 9, rigid link 9 protrudes upward the top cover 2 by the rigid link through hole 10 on top cover 2, and the rigidity connects Upper end board 11 is installed in the part that bar 9 is protruded upward, and rigid link 9 coordinates with the dynamic sealing of rigid link through hole 10;The outer layer Axial grip component 12 is provided with around rigid transparent sleeve, axial grip component 12 accommodates clamping force to top cover 2 and base 1 Rigid transparent sleeve is promoted to be clamped by top cover 2 and base 1 and fixed, the axial grip component 12 includes that four hands twist screw rod, Screw rod is threadedly coupled through the screw corresponding with the base 1 of top cover 2;The upper surface of the top cover 2 is provided with fixed displacement meter 13 With air admission hole 14, the measurement end of the fixed displacement meter 13 is against on the upper end board 11, and the top of top cover 2 is provided with top cover and consolidates Fixed pole 15, is laterally fixed with horizontal bars in top cover fix bar 15, the fixed displacement meter 13 is arranged in horizontal bars, described Air admission hole 14 is connected by valve with pressue device, and the pressue device includes air compressor machine 17 and voltage-stablizer 18, and air compressor machine 17 leads to Piping is connected with voltage-stablizer 18, and voltage-stablizer 18 is connected by pipeline with valve, and valve is arranged on the air admission hole 14 of top cover 2, Valve is the stop valve with rotary knob, can control the making and truncation state of air-flow;The row of being additionally provided with the top cover 2 Stomata 19 and pressure tap, pressure tap are connected by valve with air pressure measuring apparatus 30, on the base 1 with axle center as origin by Interior and be sequentially distributed multiple circle rhones 21 outward, circular rhone 21 is separated into four portions by right-angled intersection drain groove 22 Point, the sidepiece of the base 1 is provided with pore pressure measured hole 23, base plate osculum 24 and the standby hole of base plate, the pore pressure measured hole 23, Base plate osculum 24 and loading chamber conducting described in the standby Kong Junyu of base plate, the standby hole of base plate can serve as accelerating the exhaust of exhaust Hole, it is also possible to another air admission hole as double air admission holes, the base plate osculum 24 passes through the external aqueduct of valve and hole Water volume measuring device;The pore pressure measured hole 23 is by the external hole water-pressure survey device of valve, the circular row of the base 1 Tank 21 and right-angled intersection drain groove 22 are connected with the base plate osculum 24, and the hole water volume measuring device is one big Range graduated cylinder, range is 1000 ML, and the base plate osculum 24 connects aqueduct, and the end of aqueduct is put into graduated cylinder, graduated cylinder Aperture of the height and position less than bottom drain holes.

The large-scale reshaped clay of vapour-pressure type that embodiment one is provided makes and one-dimensional consolidation experiment coupled system, can be used to make Make 450 mm high, the making of the large-scale consolidation sample of the mm of diameter 250, while carrying out one-dimensional consolidation experiment, drawe -pCurve, Obtain the compression index such as cake compressibility, the compressed coefficient of clay.

Embodiment two

Embodiment two makes for hollow cylinder sample, and essentially identical with one embodiment, difference is:

Referring to Fig. 3, Fig. 8, Figure 11, the trapping end board 6 that the large-scale consolidation sample of embodiment one makes experiment is circular adding Support plate, the circular load plate is solid steel plate, and the trapping end board 6 that the present embodiment two is used is annular load plate, is set thereon Annular load plate bolt hole is put, it is connected with the screw thread of rigid link 9, is annular permeable stone with annular load plate directly contact, and Annular permeable stone is then positioned over hollow cylinder soil sample top.Annular the loading mm of plate thickness 13, the mm of external diameter 100, the mm of internal diameter 60.

Referring to Fig. 4, Fig. 8, Figure 11, the present embodiment two is that the rigidity is saturating with second difference of embodiment one Bright sleeve includes outer sleeve 8, middle sleeve 28 and inner sleeve 29, and outer sleeve 8, middle sleeve 28 and inner sleeve 29 are circumferentially uniform Eight permeable stone grooves of vertical distribution are set, vertical permeable stone 3 is placed with the permeable stone groove;Trapping end board 6 and horizontal permeable stone 7 in surrounding with middle sleeve 28 and inner sleeve 29 annular shape that the Space Cross Section that is formed is matched, outer sleeve 8 play a part of stabilization laboratory apparatus, three sleeves be individually positioned in base 1 with the corresponding sleeve groove of top cover 2;Outer sleeve 8 The mm of height 470, the mm of internal diameter 250, the mm of external diameter 270, its vertical permeable stone 3 height 470 mm, the mm of thickness 3, width is arc 15 degree of angles of shape.The mm of height 470 of middle sleeve 28, the mm of internal diameter 100, the mm of external diameter 120, its thickness of vertical permeable stone 3 height 470 Mm, the mm of thickness 3, width be 15 degree angles of arc, the height 470mm of inner sleeve 29, internal diameter 40mm, external diameter 60mm, its vertically it is permeable The thickness height 470mm of stone 3, thickness 3mm, width is 15 degree of angles of arc.

In practical operation, rigid transparent sleeve includes outer sleeve 8, middle sleeve 28 and inner sleeve 29, if making big Solid cylindrical sample just removes middle sleeve 28 and inner sleeve 29, only surrounds sample die cavity with outer sleeve 8;If making small filled circles Post sample just retains in outer sleeve 8 and middle sleeve 28 and inner sleeve 29, and wherein outer sleeve 8 is acted on as supporting stabilizer, And middle sleeve 28 or inner sleeve 29 surround sample die cavity;All retain outer sleeve 8, middle sleeve if if making hollow cylinder sample 28 and inner sleeve 29, wherein middle sleeve 28 and inner sleeve 29 surrounds sample die cavity.

Claims (6)

1. a kind of large-scale reshaped clay of vapour-pressure type makes and one-dimensional consolidation experiment coupled system, including rigid transparent sleeve, base And top cover, the rigid transparent sleeve is configured with vertically arranged vertical permeable stone, upper end and the top of the rigid transparent sleeve The upper bush groove grafting that is opened up on the lower surface of lid simultaneously seals in cooperation, the lower sleeve groove on lower end insertion base upper surface and close Envelope coordinates;Space that top cover, rigid transparent sleeve and base are surrounded is divided into trapping end board air chamber and the bottom on top Loading chamber, trapping end board lower section is configured with horizontal permeable stone;A rigid link is fixedly connected on the board of the trapping end, rigidity Connecting rod protrudes upward the top cover by the rigid link through hole on top cover, and the part that the rigid link is protruded upward is installed End board, vertical rigid link coordinates with through hole dynamic sealing;Axial grip is provided with around the outer layer of the rigid transparent sleeve Component, axial grip component accommodates clamping force and promotes rigid transparent sleeve to be clamped and consolidated by top cover and base to top cover and base It is fixed;The top cover upper surface is provided with fixed displacement meter and air admission hole, and the measurement end of the fixed displacement meter is against the upper end and holds On plate, the air admission hole is connected by valve with pressue device;Steam vent and pressure tap, pressure tap are additionally provided with the top cover It is connected with air pressure measuring apparatus by valve, has been sequentially distributed multiple circles on the base from inside to outside with axle center as origin Rhone, circular rhone is separated into four parts by right-angled intersection drain groove, and the base sidepiece is provided with pore pressure measurement Hole, base plate osculum and the standby hole of base plate, the pore pressure measured hole, base plate osculum and loading chamber described in the standby Kong Junyu of base plate Conducting, the base plate osculum passes through the external aqueduct of valve and hole water volume measuring device;The pore pressure measured hole passes through The external hole water-pressure survey device of valve, circular rhone and right-angled intersection drain groove and the base plate draining of the base Hole connects;The rigid transparent sleeve is the outer sleeve in periphery, trapping end board and horizontal permeable stone in it is outer The circle of sleeve matching;The rigid transparent sleeve includes outer sleeve, middle sleeve and inner sleeve, outer sleeve, middle sleeve and inner sleeve Cylinder is circumferentially uniformly arranged eight permeable stone grooves of vertical distribution, is placed with the permeable stone groove vertical permeable Stone;Trapping end board and horizontal permeable stone are in surround the circle that the Space Cross Section to be formed is matched with middle sleeve and inner sleeve Ring-type.
2. the large-scale reshaped clay of vapour-pressure type makes and one-dimensional consolidation experiment coupled system according to claim 1, it is characterized in that: The upper bush groove is that elastic tape is laid in toroidal cavity, toroidal cavity, and the lower sleeve groove is toroidal cavity, annulus Elastic tape is laid in connected in star.
3. the large-scale reshaped clay of the vapour-pressure type according to claim 1 or 2 makes and one-dimensional consolidation experiment coupled system, and it is special Levying is:The pressue device includes air compressor machine and voltage-stablizer, and air compressor machine is connected by pipeline with voltage-stablizer, and voltage-stablizer passes through pipeline It is connected with valve, valve is arranged on the air admission hole of top cover, and valve is the stop valve with rotary knob, can control air-flow Making and truncation state.
4. the large-scale reshaped clay of the vapour-pressure type according to claim 3 makes and one-dimensional consolidation experiment coupled system, its feature It is:The axial grip component includes that four hands twist screw rod, and screw rod connects through top cover screw screw thread corresponding with the base Connect.
5. the large-scale reshaped clay of vapour-pressure type makes and one-dimensional consolidation experiment coupled system according to claim 1, it is characterized in that: The top cover top is provided with top cover fix bar, and horizontal bars are laterally fixed with top cover fix bar, and the fixed displacement meter sets It is placed in horizontal bars.
6. a kind of large-scale reshaped clay of vapour-pressure type according to claim 1 makes and one-dimensional consolidation experiment coupled system, its It is characterised by:The hole water volume measuring device is a wide range graduated cylinder, and range is 1000 ML, and the osculum connects water guide Pipe, the end of aqueduct is put into graduated cylinder, the aperture of the height and position less than bottom drain holes of graduated cylinder.
CN201510013848.2A 2015-01-12 2015-01-12 The large-scale reshaped clay of vapour-pressure type makes and one-dimensional consolidation experiment coupled system CN104596817B (en)

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CN105203361A (en) * 2015-09-25 2015-12-30 同济大学 Remolded soil consolidation method and consolidation device
CN105445106A (en) * 2015-11-09 2016-03-30 立方通达实业(天津)有限公司 Atmospheric pressure consolidation instrument for different soil sample sizes
CN105424907B (en) * 2015-11-09 2018-05-11 立方通达实业(天津)有限公司 Atmospheric pressure cavity and the gas pressure consolidation instrument set into/discharge pipe line homonymy
CN106198144A (en) * 2016-07-19 2016-12-07 温州大学 Manipulated soil vacuum load associating sample preparation device
CN106525104B (en) * 2016-10-10 2019-07-12 河海大学 A kind of solid sample upper bed-plate of GDS torsion shear apparatus
CN107387481B (en) * 2017-06-27 2018-08-31 北京航天动力研究所 A kind of air pressure loading device for low temperature environment
CN107907392A (en) * 2017-11-13 2018-04-13 武汉轻工大学 The sample preparation device and method for making sample of vapour-pressure type manipulated soil
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