CN105486840A - Solidification and permeation combined experimental device - Google Patents
Solidification and permeation combined experimental device Download PDFInfo
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- CN105486840A CN105486840A CN201511005165.9A CN201511005165A CN105486840A CN 105486840 A CN105486840 A CN 105486840A CN 201511005165 A CN201511005165 A CN 201511005165A CN 105486840 A CN105486840 A CN 105486840A
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- 230000008023 solidification Effects 0.000 title abstract 6
- 238000007711 solidification Methods 0.000 title abstract 6
- 239000002689 soil Substances 0.000 claims abstract description 73
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 238000012360 testing method Methods 0.000 claims abstract description 47
- 238000006073 displacement reaction Methods 0.000 claims abstract description 25
- 238000007596 consolidation process Methods 0.000 claims description 48
- 238000002474 experimental method Methods 0.000 claims description 41
- 238000001764 infiltration Methods 0.000 claims description 32
- 230000008595 infiltration Effects 0.000 claims description 32
- 239000002184 metal Substances 0.000 claims description 23
- 229910052751 metal Inorganic materials 0.000 claims description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 238000001914 filtration Methods 0.000 claims description 9
- 230000035699 permeability Effects 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 239000002245 particle Substances 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 abstract 4
- 239000011362 coarse particle Substances 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 238000004088 simulation Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 239000004576 sand Substances 0.000 description 6
- 230000005476 size effect Effects 0.000 description 6
- 239000012466 permeate Substances 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 235000014121 butter Nutrition 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004746 geotextile Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 229940099259 vaseline Drugs 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 235000014653 Carica parviflora Nutrition 0.000 description 1
- 241000243321 Cnidaria Species 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Dispersion Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Remote Sensing (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to a solidification and permeation combined experimental device. The solidification and permeation combined experimental device comprises a base, a pressure chamber, a pressurizing assembly, a permeation assembly and a numerical value acquisition system, wherein the pressure chamber is fixed on the base; a pressurizing upper cover is arranged at the top of the pressure chamber in a sliding manner; the pressurizing assembly is connected with the pressurizing upper cover and can be used for applying pre-set pressure to the pressurizing upper cover; the permeation assembly comprises a water overflowing pipe, an adjusting pipe and a plurality of pressure detection pipes; a water overflowing hole is formed in the upper end of the pressure chamber; the water overflowing pipe is connected with the water overflowing hole; the adjusting pipe is connected with a water discharging hole; a plurality of pressure detection holes are formed in the pressure chamber along the vertical direction; the plurality of pressure detection pipes are connected with the plurality of pressure detection holes respectively; the numerical value acquisition system comprises a pressure transmitter, a displacement sensor and a control unit; and the control unit is connected with the pressure transmitter and the displacement sensor and is used for receiving pressure information and displacement information. The solidification and permeation combined experimental device can be used for performing a solidification and permeation combined test of coarse-particle soil under different solidification degrees, and a real stress state of large-particle oil with different burying depths is accurately simulated in a laboratory.
Description
Technical field
The present invention relates to Geotechnical Engineering field, particularly a kind of consolidation infiltration Collaborative experiment device.
Background technology
Along with the development of national economy, in the construction that Maritime Silk Road is like a raging fire, traditional consolidation infiltration soil test equipment provides effective technical parameter far can not to coastal engineering and engineering on an island and hydraulic engineering.The achievement of routine consolidation test is meeting General Requirements, but traditional consolidometer can not evaluate the permeance property of sample.Conventional permeability test completes under the condition axially do not loaded, be only applicable to the soil sample situation on earth's surface, simulate deep soil (sand) sample with it to test, the infiltration coefficient measured does not conform to the actual conditions, because deep soil is by terrestrial stress effect, hole between soil and soil is less, and seepage channel is little, and therefore the infiltration coefficient of infiltration layer soil is little.
When the large quantity research of Chinese scholars shows that in test, barrel bore is greater than 10 times of sample maximum particle diameter, well could eliminate the size effect of particle.These all can not meet the requirement relating to the engineerings such as coarse-grained soil, calcareous sand, the rock-fill dams of coral sand, coastal bank protection project and island.Because specimen size is large, the axle pressure of needs is large, and existing pressure structure is difficult to be applied to corresponding pressure.
When consolidation of the prior art infiltration associating instrument is tested bulky grain soil (sand), larger size effect can be there is, there is comparatively big error, cannot the true stress state of bulky grain soil (sand) of accurate simulation different buried depth.
Summary of the invention
A kind of consolidation infiltration Collaborative experiment device that the application provides, to solve or part solves consolidation of the prior art infiltration associating instrument when testing bulky grain soil, larger size effect can be there is, there is comparatively big error, cannot the technical matters of true stress state of bulky grain soil of accurate simulation different buried depth, achieve and not only can carry out routine consolidation test, conventional permeability test, fine grained consolidation infiltration Combined Trials, and coarse-grained soil consolidation permeates Combined Trials under can carrying out the different degree of consolidation, the technique effect of the bulky grain soil true stress state of accurate simulation different buried depth in laboratory.
This application provides a kind of consolidation infiltration Collaborative experiment device, comprising:
Base, offers freeing port and many first grooves, and described many first grooves are communicated with described freeing port;
Pressure chamber, is fixed on described base; Inside, described pressure chamber is cavity, and top slide is provided with pressurization upper cover; Described pressurization upper cover offers water inlet and many second grooves, and described many second grooves are communicated with described water inlet;
Pressure-applying unit, is connected with described pressurization upper cover, can apply set pressure to described pressurization upper cover;
Filtration module, described filtration module comprises: overflow pipe, adjustable pipe and many piezometric tube; Upper end, described pressure chamber is provided with gap, and described overflow pipe connects described gap; Described adjustable pipe connects described freeing port; Described pressure chamber is vertically provided with multiple pressure tap, and described many piezometric tube connect described multiple pressure tap respectively;
Numerical value acquisition system, described numerical value acquisition system comprises: pressure unit, displacement transducer and control module; Described pressure unit is for detecting described pressurization upper cover to soil sample applied pressure; Institute's displacement sensors is for detecting the shift length of described pressurization upper cover; Described control module is connected with described pressure unit and institute's displacement sensors;
Wherein, when carrying out consolidation permeability test, described soil sample is filled in described cavity.
As preferably, described pressure chamber is the cylinder of hollow-core construction;
Described pressurization upper cover is Circular plate structure, described pressurization upper cover circumferentially offer the first ring groove, be provided with the first O-ring seal in described first ring groove;
Described cylinder and described base are bolted to connection; The position of the corresponding described cylinder of described base offers the second ring groove, is provided with the second O-ring seal in described second ring groove;
Wherein, described first O-ring seal and the second O-ring seal are by the cavities seals of inside, described pressure chamber.
As preferably, described water inlet is positioned at the center of described plectane;
Described many second grooves comprise: the annular groove of many concyclic hearts and the strip groove of many radial arrangement; Described annular groove is communicated with described water inlet by described strip groove;
Described freeing port is positioned at the home position of described second ring groove;
Described many first grooves comprise: the annular groove of many concyclic hearts and the strip groove of many radial arrangement; Described annular groove is communicated with described freeing port by described strip groove.
As preferably, described pressure-applying unit comprises:
Primary lever, one end is fixed on the ground by the first column;
Second lever, is fixed on the ground by the second column; Described second lever connects the other end of described primary lever by hinge bar;
Spiral jointing, top connects described primary lever, and tie point is near described first column; Bottom and the described pressurization upper cover of described spiral jointing are threaded connection, and make described pressurization upper cover relatively described pressure chamber slippage by turning described spiral jointing;
Pressurization pallet, hangs the one end being located at described second lever;
Counterweight pallet, hangs the other end being located at described second lever;
Wherein, the tie point of described second lever and described second column between described pressurization pallet and counterweight pallet, near described counterweight pallet; The tie point of described hinge bar and described second lever between described second column and described pressurization pallet, near described second column.
As preferably, described Collaborative experiment device also comprises:
Two pieces of metal perforated plates, are separately positioned between described soil sample and described base and between described pressurization upper cover and described soil sample;
Filter screen, is arranged between described soil sample and described base, is positioned at the top of described metal perforated plate;
Wherein, the aperture of described metal perforated plate is greater than the aperture of described filter screen.
As preferably, described Collaborative experiment device comprises 3 described piezometric tube;
Described pressure chamber is vertically provided with 3 pressure taps, and described 3 pressure taps are vertically equidistantly arranged; Described 3 piezometric tube connect described 3 pressure taps respectively.
As preferably, described Collaborative experiment device also comprises:
Water supply bottle, is fixed on the top of described pressure chamber;
Feed pipe, one end is connected with described water supply bottle, to provide experimental water;
Tongs, is arranged on described feed pipe.
As preferably, described Collaborative experiment device also comprises:
Temperature test parts, are arranged in described pressurization and cover;
Graduated cylinder, is arranged on described base, to measure the seepage flow water yield by described soil sample;
As preferably, the top center of described pressurization upper cover is provided with iron plate, and institute's displacement sensors is fixed on described iron plate;
Described control module comprises: dynamic test system and computing machine; Described dynamic test system is connected with described pressure unit, institute's displacement sensors and described computing machine.
As preferably, described Collaborative experiment device also comprises:
Sliding support, described sliding support comprises support bar and horizon bar; Described support bar is fixed on described base; Described horizon bar and described support bar are slidably connected;
Described adjustable pipe hangs and is located on described horizon bar;
Wherein, by the described horizon bar that slides, to change the vertical height of described adjustable pipe.
The one or more technical schemes provided in the application, at least have following technique effect or advantage:
Owing to have employed the Collaborative experiment device ensureing seepage velocity uncrossed base, pressure chamber, pressure-applying unit, filtration module and numerical value acquisition system, rationally can carry out stress loading and infiltration coupling test, in laboratory, simulation test is accurately carried out to buried bulky grain soil, for infiltration, the consolidation coupling of furtheing investigate buried bulky grain soil provide technology and ensure and support, will effectively promote the deep development of the research.Like this, efficiently solve consolidation of the prior art infiltration associating instrument when bulky grain soil is tested, larger size effect can be there is, there is comparatively big error, cannot the technical matters of true stress state of bulky grain soil of accurate simulation different buried depth, achieve and not only can carry out routine consolidation test, conventional permeability test, fine grained consolidation infiltration Combined Trials, and coarse-grained soil consolidation permeates Combined Trials under can carrying out the different degree of consolidation, the technique effect of the bulky grain soil true stress state of accurate simulation different buried depth in laboratory.
Accompanying drawing explanation
The configuration diagram of the consolidation infiltration Collaborative experiment device that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 is the configuration diagram of pressure-applying unit in Fig. 1;
Fig. 3 is the configuration diagram of upper cover of pressurizeing in Fig. 1;
Fig. 4 is the cross-sectional schematic of upper cover of pressurizeing in Fig. 1;
Fig. 5 is the configuration diagram of base in Fig. 1;
Fig. 6 is the cross-sectional schematic of base in Fig. 1;
Fig. 7 is the configuration diagram of filter screen in Fig. 1.
(in diagram, the parts of each label representative are followed successively by: 1 base, 2 filter screens, 3 metal perforated plates, 4 pressure chambers, 5 piezometric tube, 6 support bars, 7 adjustable pipes, 8 pressurization upper covers, 9 displacement transducers, 10 temperature test parts, 11 tongses, 12 feed pipes, 13 water supply bottles, 14 measuring cups, 15 gaps, 16 soil samples, 17 O-ring seals, 18 bolts, 19 second levers, 20 spiral jointings, 21 pressurization pallets, 22 overflow pipes, 23 horizon bars, 24 pressure units, 25 dynamic test systems, 26 computing machines, 27 counterweight pallets, 28 water inlets, 29 freeing port)
Embodiment
A kind of consolidation infiltration Collaborative experiment device that the embodiment of the present application provides, to solve or part solves consolidation of the prior art infiltration associating instrument when testing bulky grain soil, larger size effect can be there is, there is comparatively big error, cannot the technical matters of true stress state of bulky grain soil of accurate simulation different buried depth, by adopting base, pressure chamber, pressure-applying unit, the Collaborative experiment device that filtration module and numerical value acquisition system are formed, achieve and not only can carry out routine consolidation test, conventional permeability test, fine grained consolidation infiltration Combined Trials, and coarse-grained soil consolidation permeates Combined Trials under can carrying out the different degree of consolidation, the technique effect of the bulky grain soil true stress state of accurate simulation different buried depth in laboratory.
See accompanying drawing 1, this application provides a kind of consolidation infiltration Collaborative experiment device, comprising: base 1, pressure chamber 4, pressure-applying unit, filtration module and numerical value acquisition system.
Pressure chamber 4 is fixed on base 1; Base 1 offers freeing port 29 and many first grooves, many first groove communicated drainage mouths 29; Inside, pressure chamber 4 is cavity, when carrying out consolidation permeability test, soil sample 16 is filled in cavity.The top slide of pressure chamber 4 is provided with pressurization upper cover 8; Pressurization upper cover 8 offers water inlet 28 and many second grooves, and many second grooves are communicated with water inlet 28; Base 1 being offered the first groove, has both defined many passages, for ensureing that water permeation does not increase penetration length to during base 1, guaranteeing accurately to calculate the density of soil sample 16.
Pressure-applying unit is connected with pressurization upper cover 8, can apply set pressure to pressurization upper cover 8.
Filtration module comprises: overflow pipe 22, adjustable pipe 7 and many piezometric tube 5; Upper end, pressure chamber 4 is provided with gap 15, and overflow pipe 22 connects gap 15; Adjustable pipe 7 connects freeing port 29; Pressure chamber 4 is vertically provided with multiple pressure tap, and many piezometric tube 5 connect multiple pressure tap respectively.
Numerical value acquisition system comprises: pressure unit 24, displacement transducer 9 and control module; Pressure unit 24 is arranged between pressurization upper cover 8 and metal perforated plate 3, for detecting pressurization upper cover 8 pairs of soil sample 16 applied pressures, generates pressure information; Displacement transducer 9, for detecting the shift length of pressurization upper cover 8, generates displacement information; Control module is connected with pressure unit 24 and displacement transducer 9, to accept pressure information and displacement information.
This Collaborative experiment device not only can carry out routine consolidation test, conventional permeability test, fine grained consolidation infiltration Combined Trials, and bulky grain soil consolidation permeates Combined Trials under can carrying out the different degree of consolidation, compression test, the creep test under the limit condition of side can be had same soil sample 16, and the consolidation test simulated at ebb tide can be carried out.This apparatus structure is simple, definite principle, be easy to that operation, precision are high, good stability, lower to installation testing personnel requirement.
Further, see accompanying drawing 1, pressure chamber 4 is the cylinder of hollow-core construction; Pressurization upper cover 8 be Circular plate structure, pressurize upper cover 8 circumferentially offer the first ring groove, be provided with the first O-ring seal in the first ring groove; Cylinder is fixedly connected with by bolt 18 with base 1; The position of the corresponding cylinder of base 1 offers the second ring groove, is provided with the second O-ring seal in the second ring groove; Wherein, the first O-ring seal and the second O-ring seal are by the cavities seals of inside, pressure chamber 4.
Further, see accompanying drawing 3 and 4, water inlet 28 is positioned at the center of plectane; Many the second groove comprises: the annular groove of many concyclic hearts and the strip groove of many radial arrangement; Annular groove is communicated with water inlet by strip groove.See accompanying drawing 5 and 6, freeing port 29 is positioned at the home position of the second ring groove; Many the first groove comprises: the annular groove of many concyclic hearts and the strip groove of many radial arrangement; Annular groove is communicated with freeing port 29 by strip groove.
Further, see accompanying drawing 2, pressure-applying unit comprises: primary lever, second lever 19, spiral jointing 20, pressurization pallet 21 and counterweight pallet 27.One end of primary lever is fixed on the ground by the first column; Second lever 19 is fixed on the ground by the second column; Second lever 19 connects the other end of primary lever by hinge bar; The top of spiral jointing 20 connects primary lever, and tie point is near the first column; The bottom of spiral jointing 20 is threaded connection with pressurization upper cover 8, makes room 4 slippage of pressurization upper cover 8 relative pressure by turning spiral jointing 20; Pressurization pallet 21 hangs the one end being located at second lever 19; Counterweight pallet 27 hangs the other end being located at second lever 19; Pressurization upper cover 8 for being threaded with spiral jointing 20, can adjusting and connect height, to regulate primary lever in pressure-applying unit parallel with second lever 19.
Wherein, the tie point of second lever 19 and the second column is pressurizeing between pallet 21 and counterweight pallet 27, near counterweight pallet 27; The tie point of hinge bar and second lever 19 is at the second column and pressurize between pallet 21, near the second column.Counterweight pallet 27 is for placing weights, to balance the friction force of primary lever, second lever 19, pressurization pallet 21 and pressure-applying unit, improves pressurization precision.This pressure-applying unit is the second lever structure of 30 times, and this structure has saved space greatly, and can produce high multiplying lever, maximumly provides 7200kg pressure, and this pressure-applying unit is simple to operation.
Further, see accompanying drawing 1 and 7, this Collaborative experiment device also comprises: two pieces of metal perforated plates 3 and filter screen 2.Two pieces of metal perforated plates 3 are separately positioned between soil sample 16 and base 1 and pressurize between upper cover 8 and soil sample 16; Filter screen 2 is arranged between soil sample 16 and base 1, is positioned at the top of metal perforated plate 3, and structure is see accompanying drawing 7; Wherein, the aperture of metal perforated plate 3 is greater than the aperture of filter screen 2.
Because applied pressure is large, soil sample 16 size is large, is easier to occur that stress is concentrated, and considers the principle of saving, aspect, so can not use permeable stone, therefore considers that design metal perforated plate 3 replaces permeable stone.Metal perforated plate 3 prevents soil sample 16 from filling metab drainage channel, hinders seepage velocity.Simultaneously metal perforated plate 3 effective short form test is set time testing crew determination specimen height and water permeation height.Effectively reduce test error, guarantee test accuracy.Because told cylindrical base 1 center is provided with, opening is large and passage is many, for ensureing that rigidity reaches requirement and devises filter screen 2.
Further, see accompanying drawing 1, Collaborative experiment device comprises 3 piezometric tube 5; Pressure chamber 4 is vertically provided with 3 pressure taps, and 3 pressure taps are vertically equidistantly arranged; 3 piezometric tube 5 connect 3 pressure taps respectively.
Further, see accompanying drawing 1, Collaborative experiment device also comprises: water supply bottle 13, feed pipe 12 and tongs 11.Water supply bottle 13 is fixed on the top of pressure chamber 4; One end of feed pipe 12 is connected with water supply bottle 13, to provide experimental water; Tongs 11 is arranged on feed pipe 12.
Further, Collaborative experiment device also comprises: temperature test parts 10 and graduated cylinder 14.Temperature test parts 10 are arranged on pressurization upper cover 8, as preferably, select thermometer.Graduated cylinder 14 is arranged on base 1, to measure the seepage flow water yield by soil sample 16.
Further, the top center of pressurization upper cover 8 is provided with iron plate, and displacement transducer 9 is fixed on iron plate; Pressurization upper cover 8 has an iron plate, and for placing displacement transducer 9, calculate test consolidation height, because iron plate is connected with pressurization upper cover 8 center, the data that displacement transducer 9 detects are more accurate.Control module comprises: dynamic test system 25 and computing machine 26; Dynamic test system 25 is connected with pressure unit 24, displacement transducer 9 and computing machine 26.
Further, this Collaborative experiment device also comprises: sliding support, and sliding support comprises support bar 6 and horizon bar 23; Support bar 6 is fixed on base 1; Horizon bar 23 and support bar 6 are slidably connected; Adjustable pipe 7 hangs and is located on horizon bar 23; Wherein, by slip horizon bar 23, to change the vertical height of adjustable pipe 7.
Below by principle of work and experimental procedure, the structure of the consolidation infiltration Collaborative experiment device that the application provides and operation characteristic thereof are described in detail:
Principle of work: this device belongs to constant head osmosis system, Darcy's law v=ki is followed according to permeating when current are laminar condition in soil, instrument operationally, soil sample 16 is by axial stress, ensure that it has the current of certain head difference to pass through simultaneously, record the infiltration capacity by soil sample 16 in certain a period of time.This consolidation system is based on ether husky base single shaft consolidation theory.Due to external load function, water and air is extruded from hole, and between the skeleton particle of soil, mutual jam-packed, causes soil body compression deformation, numerical value acquisition system collect and process deflection while record infiltration capacity.During assembling instrument, prevent from leaking, leaking gas by O-ring seal, by reducing the friction of pressurization upper cover 8 and metallic cylinder inwall at metallic cylinder coating butter or vaseline etc. (lubricant).Ensure that seepage channel is unimpeded by metal perforated plate 3, and can effective Control Assay density.
Apply xial feed by pressure-applying unit to soil sample, carry out saturated bulky grain soil consolidation test, gather axial force and sample settling amount by dynamic test system 25; After pressure-applying unit applies xial feed to soil sample 16, under the different degree of consolidation, provide stable head difference by water supply bottle 13, then survey the seepage flow of each soil sample 16 height of note by graduated cylinder 14, complete consolidation infiltration Combined Trials.
Carry out consolidation infiltration Collaborative experiment to the soil sample 16 of diameter 300mm, height 300mm, the largest particles particle diameter 30mm below, experimental procedure comprises:
S1, the spiral jointing 20 connected on pressurization upper cover 8 and pressure-applying unit.Base 1 and pressure chamber 4 are fixed, checks whether each pipe joint place, base 1 and cylinder junction leak.Successively metal perforated plate 3, filter screen 2 and geotextile are put into base 1.Piezometric tube 5 is installed.
S2, connection adjustable pipe 7 and feed pipe 12, after being discharged by the gas in base 1 pipeline, in metal perforated plate 3, close tongs 11.
S3, at pressure chamber 4 height more than 250mm inwall coating butter or vaseline, can reduce the O-ring seal 17 of the upper cover 8 that pressurizes and the friction of cylinder inner wall.
S4, get representative sand as soil sample 16, and measure its water percentage, soil sample 16 is divided into 10-15 layer and loads cylinder, hit actual arrival certain height with ramming device, to control void ratio.
Tongs 11 on feed pipe 12 after sample compacting completes, is opened by S5, every layer of examination, water surface elevation rise to soil sample 16 concordant time close tongs 11.After successively filling soil sample 16 according to above-mentioned steps, then put geotextile and metal perforated plate 3 successively.Survey the height of metal perforated plate 3 to cylinder top, calculate soil sample 16 height.
S6, adjustment pressurization upper cover 8, make it just in time contact with metal perforated plate 3, and add counterweight on counterweight pallet 27, regulate second lever 19 parallel with surveyor's staff.Make that pressurization upper cover 8 contacts completely with metal perforated plate 3, metal perforated plate 3 fully contacts with soil sample 16.
S7, installation position displacement sensor 9.Crack tongs 11, until water overflows from gap 15.
S8, check that whether each piezometric level is consistent with gap 15 water level, when piezometric tube 5 is different from gap 15 water level, is because instrument has possibility of gas collection or gas leakage, adjusts piezometric tube 5 water level, until concordant with gap 15 water level with water suction ball.
S9, adjustable pipe 7 is brought up to more than gap 15 water level, then separation adjusting pipe 7 and feed pipe 12, open tongs 11, feed pipe 12 is put into cylinder, water is injected in cylinder, adds counterweight according to required loading stress, add counterweight at counterweight pallet 27, make primary lever parallel with second lever 19, start to gather displacement transducer 9 and pressure unit 24 data.Note should be surveyed by following time sequencing after applying every first class pressure.Time is that 6s, 15s, 1min, 2min15s, 4min, 6min15s, 9min, 12min15s, 16min, 20min15s, 5min, 30min15s, 36min, 42min15s, 49min, 64min, 100min, 200min, 400min, 23h, 24h are to stable.
S10, adjustable pipe is down to top 1/3 At The Height of soil sample 16, forms water level official post water and infiltrate soil sample 16, flowed out by adjustable pipe 7.Regulate tongs 11, make the water yield entering cylinder be a bit larger tham the water of gap 15 discharge, keep stable level in cylinder.When after piezometric tube 5 stable level, record piezometric tube 5 water level, and calculate the water-head between each piezometric tube 5.Safety record of fixing time oozes out the water yield, and measures the water temperature of water inlet 28, averages.
S11, the middle part reducing adjustable pipe 7 to soil sample 16 and bottom 1/3 place, repeat the 10th step, measures and ooze out the water yield and water temperature.
The one or more technical schemes provided in the application, at least have following technique effect or advantage:
The uncrossed base 1 of seepage velocity is ensured owing to have employed, pressure chamber 4, pressure-applying unit, the Collaborative experiment device of filtration module and numerical value acquisition system, rationally can carry out stress loading and infiltration coupling test, ensure that Accurate Determining is at stress loading, side is had to limit with under axial drainage condition, the relation of distortion (void ratio) and stress, the relation of distortion and time and stress, infiltration coefficient, with the relation of time three, and then accurately calculate the unit settling amount of bulky grain soil, compressibility coefficient, compression index, the indexs such as infiltration coefficient, ensure that this test can reflect that engineering is actual more realistically, as roadbed before and after rainy season, the draining on basis and sedimentation situation, offshore engineering and engineering on an island foundation drainage situation during tide.Like this, efficiently solve consolidation of the prior art infiltration associating instrument when bulky grain soil is tested, larger size effect can be there is, there is comparatively big error, cannot the technical matters of true stress state of bulky grain soil of accurate simulation different buried depth, achieve and not only can carry out routine consolidation test, conventional permeability test, fine grained consolidation infiltration Combined Trials, and coarse-grained soil consolidation permeates Combined Trials under can carrying out the different degree of consolidation, the technique effect of the bulky grain soil true stress state of accurate simulation different buried depth in laboratory.
Above-described embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only the specific embodiment of the present invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a consolidation infiltration Collaborative experiment device, it is characterized in that, described Collaborative experiment device comprises:
Base, offers freeing port and many first grooves, and described many first grooves are communicated with described freeing port;
Pressure chamber, is fixed on described base; Inside, described pressure chamber is cavity, and top slide is provided with pressurization upper cover; Described pressurization upper cover offers water inlet and many second grooves, and described many second grooves are communicated with described water inlet;
Pressure-applying unit, is connected with described pressurization upper cover, can apply set pressure to described pressurization upper cover;
Filtration module, described filtration module comprises: overflow pipe, adjustable pipe and many piezometric tube; Upper end, described pressure chamber is provided with gap, and described overflow pipe connects described gap; Described adjustable pipe connects described freeing port; Described pressure chamber is vertically provided with multiple pressure tap, and described many piezometric tube connect described multiple pressure tap respectively;
Numerical value acquisition system, described numerical value acquisition system comprises: pressure unit, displacement transducer and control module; Described pressure unit is for detecting described pressurization upper cover to soil sample applied pressure; Institute's displacement sensors is for detecting the shift length of described pressurization upper cover; Described control module is connected with described pressure unit and institute's displacement sensors;
Wherein, when carrying out consolidation permeability test, described soil sample is filled in described cavity.
2. Collaborative experiment device as claimed in claim 1, is characterized in that,
Described pressure chamber is the cylinder of hollow-core construction;
Described pressurization upper cover is Circular plate structure, described pressurization upper cover circumferentially offer the first ring groove, be provided with the first O-ring seal in described first ring groove;
Described cylinder and described base are bolted to connection; The position of the corresponding described cylinder of described base offers the second ring groove, is provided with the second O-ring seal in described second ring groove;
Wherein, described first O-ring seal and the second O-ring seal are by the cavities seals of inside, described pressure chamber.
3. Collaborative experiment device as claimed in claim 2, is characterized in that,
Described water inlet is positioned at the center of described plectane;
Described many second grooves comprise: the annular groove of many concyclic hearts and the strip groove of many radial arrangement; Described annular groove is communicated with described water inlet by described strip groove;
Described freeing port is positioned at the home position of described second ring groove;
Described many first grooves comprise: the annular groove of many concyclic hearts and the strip groove of many radial arrangement; Described annular groove is communicated with described freeing port by described strip groove.
4. Collaborative experiment device as claimed in claim 1, it is characterized in that, described pressure-applying unit comprises:
Primary lever, one end is fixed on the ground by the first column;
Second lever, is fixed on the ground by the second column; Described second lever connects the other end of described primary lever by hinge bar;
Spiral jointing, top connects described primary lever, and tie point is near described first column; Bottom and the described pressurization upper cover of described spiral jointing are threaded connection, and make described pressurization upper cover relatively described pressure chamber slippage by turning described spiral jointing;
Pressurization pallet, hangs the one end being located at described second lever;
Counterweight pallet, hangs the other end being located at described second lever;
Wherein, the tie point of described second lever and described second column between described pressurization pallet and counterweight pallet, near described counterweight pallet; The tie point of described hinge bar and described second lever between described second column and described pressurization pallet, near described second column.
5. Collaborative experiment device as claimed in claim 1, it is characterized in that, described Collaborative experiment device also comprises:
Two pieces of metal perforated plates, are separately positioned between described soil sample and described base and between described pressurization upper cover and described soil sample;
Filter screen, is arranged between described soil sample and described base, is positioned at the top of described metal perforated plate;
Wherein, the aperture of described metal perforated plate is greater than the aperture of described filter screen.
6. Collaborative experiment device as claimed in claim 1, is characterized in that,
Described Collaborative experiment device comprises 3 described piezometric tube;
Described pressure chamber is vertically provided with 3 pressure taps, and described 3 pressure taps are vertically equidistantly arranged; Described 3 piezometric tube connect described 3 pressure taps respectively.
7. Collaborative experiment device as claimed in claim 1, it is characterized in that, described Collaborative experiment device also comprises:
Water supply bottle, is fixed on the top of described pressure chamber;
Feed pipe, one end is connected with described water supply bottle, to provide experimental water;
Tongs, is arranged on described feed pipe.
8. Collaborative experiment device as claimed in claim 1, it is characterized in that, described Collaborative experiment device also comprises:
Temperature test parts, are arranged in described pressurization and cover;
Graduated cylinder, is arranged on described base, to measure the seepage flow water yield by described soil sample.
9. Collaborative experiment device as claimed in claim 1, is characterized in that,
The top center of described pressurization upper cover is provided with iron plate, and institute's displacement sensors is fixed on described iron plate;
Described control module comprises: dynamic test system and computing machine; Described dynamic test system is connected with described pressure unit, institute's displacement sensors and described computing machine.
10. Collaborative experiment device as claimed in claim 1, it is characterized in that, described Collaborative experiment device also comprises:
Sliding support, described sliding support comprises support bar and horizon bar; Described support bar is fixed on described base; Described horizon bar and described support bar are slidably connected;
Described adjustable pipe hangs and is located on described horizon bar;
Wherein, by the described horizon bar that slides, to change the vertical height of described adjustable pipe.
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