CN102809641A - Undisturbed soil sample expansion force testing device capable of controlling saturation - Google Patents
Undisturbed soil sample expansion force testing device capable of controlling saturation Download PDFInfo
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- CN102809641A CN102809641A CN201210237803XA CN201210237803A CN102809641A CN 102809641 A CN102809641 A CN 102809641A CN 201210237803X A CN201210237803X A CN 201210237803XA CN 201210237803 A CN201210237803 A CN 201210237803A CN 102809641 A CN102809641 A CN 102809641A
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Abstract
The invention discloses an undisturbed soil sample expansion force testing device capable of controlling the saturation. The device comprises a base supporting system, wherein a lower disc is fixed on the base supporting system, a cutting ring base and a cutting ring are arranged on the lower disc, and the upper part of the cutting ring base is provided with an upper cover; a central circular groove and an annular groove are formed on the lower disc, a soil pressure sensor is arranged in the central circular groove, an annular water penetration plate is arranged in the annular groove, water-immersion circular grooves are formed on the annular water penetration plate, water-permeable stones are uniformly placed in the water-immersion circular grooves, and the bottom of the annular groove is connected with an external water injection system through a pipeline; a soil sample is placed between the lower disc and the cutting ring, and a water-permeable plate base which is provided with a water-permeable plate and water-permeable holes is arranged on the top of the soil sample; and a plunger, overflow equipment and vacuum extraction equipment are arranged on the upper cover. The device effectively solves the problems that testing devices for an expansion back pressure method, a pressurization expansion method and a balance pressurization method have relatively large disturbance on soil sample structures, cannot effectively control strict saturation states and are relatively long in testing time consumption.
Description
Technical field
The invention belongs to soil sample physical quantity testing apparatus technical field, be specifically related to a kind of saturated soil sample bulging force proving installation of disturbance may command that do not have.
Background technology
Soil test is one of substance of soil mechanics research, and soil test can disclose the distinctive mechanical property of the soil body, can confirm various theories and engineering design parameter, also can verify the correctness and the practicality of various theories simultaneously.Therefore, soil test has irreplaceable effect for the theoretical research and the practical applications of soil mechanics.
Just because of this importance of soil test makes the accuracy of soil test come into one's own.And the accurate mensuration of soil sample parameter concerns the correctness and the feasibility of theoretical research more in the soil test.Therefore, the test new equipment of development to soil sample realize fast, the mensuration of parameter has crucial meaning under the no disturbance condition, particularly is directed against the mechanical property of special soil, should study its special mechanical property by special test unit and test method.
Swelled ground is a kind of geologic body with remarkable swell-shrink characteristics that in natural geological process, forms, and the clay composition mainly is made up of strongly hydrophilic mineral smectite and illite.The engineering propertiess different with the normal consolidation clay such as that have swelled ground overconsolidation property, fissurity, suction significantly expand is softening, dehydration shrinkage cracking, therefore, the roadbed and the side slope of building in typical swelled ground distributive province usually are " meet moat to slide, have dike to collapse ".Swelled ground especially all has serious destruction to light construction, roadbed, airport, side slope and dykes and dams etc. to buildings, and this destruction often has repeatability and long-term latency.Swelled ground and engineering problem thereof are one of worldwide technological puzzle of up to the present still not properly settling of ground circle, and these a series of problems cause by the bulging force of swelled ground.Therefore, bulging force how to measure and estimate swelled ground just becomes one of key issue of research swelled ground mechanical characteristic.
Bulging force has important researching value as the special mechanical property of swelled ground.Bulging force testing experiment method has a lot, and at present common have expansion back-pressure method, pressurization plavini and a balance pressurization.
Expansion back-pressure method be instigate soil sample fully absorb water free expansion stable after again load application make it return to initial volume; After letting soil sample expand into to greatest extent in the test; Loading compression step by step, till soil sample was returned to initial volume, at this moment required applied pressure was defined as bulging force.
The pressurization plavini is earlier with soil sample compression immersion expansion then; Soil sample is equal with the decrement that this pressure produces down in the swell increment that produced of immersion under a certain pressure; This pressure is defined as bulging force, confirms the bulging force value through a series of load-swell increment corresponding relation curve in the process of the test.
The balance pressurization is meant that progressively load application is eliminated dilatational strain step by step, keeps the soil sample constancy of volume when the soil sample suction begins to produce certain expansion, and the aggregate-value of last load application is bulging force.
Analysis can know that these bulging force method of testings all have shortcoming in various degree:
1. the pressure that expansion back-pressure method records is for " consolidation pressure " but not truly " swelling pressure "; Concrete reason is: the Shi He compression soil body is a kind of consolidation process, the physical process that fixed is the particle generation slippage of forming soil skeleton, fragmentation, reorganization, the hole free water is discharged and hole reduces; Expand then is that intergranular, intergranular combination moisture film thicken " wedge " and open the process of the physical chemistry of particle to mechanics.It is thus clear that the power that expansion back-pressure method records is " consolidation pressure " but not " swelling pressure ".Test unit is: test adopts cutting ring and consolidometer to carry out; It operates general procedure, at first is equipped with appearance with the high cutting ring of 2cm, then cutting ring is connect height; The consolidometer of packing into; Adjustment dial gauge pointer is zero, add water leave soil sample fully expand stable after, stage loading is till the compression deformation of volume less than the soil sample initial volume occurring.The arrangement test result obtains one " immersion pressuring curve ", and the corresponding pressure of the intersection point of this curve and lines of zero distortion is bulging force.Its shortcoming is: the power that the method records is " consolidation pressure " but not " swelling pressure ", is not inconsistent with the physical significance of bulging force; The test of maximum swelling power needs to draw through curve plotting, can not record through testing directly, and inconvenience can not reflect the test actual value.In addition, the state of saturation of the uncontrollable soil sample of this test method.
2. the pressurization plavini is when applying maximum one-level load, and the soil body has produced compression deformation, has changed the dry density and the original state structure of the soil body, and therefore, trial value and actual value are had any different.Test unit is: test adopts cutting ring and consolidometer to carry out; Its operation general procedure is; Stable in different load lower compression respectively in the test with a plurality of soil samples, adjustment dial gauge pointer position (considering the instrument deflection), adding water, to appoint soil sample to be expanded to stable; The arrangement test result obtains one " the expansivity curves under the different loads ", and this curve and the corresponding pressure of lines of zero distortion intersection point are bulging force.Its shortcoming is: earlier soil sample is compressed in the test, produced soil disturbance, destroyed the microstructure of soil sample; Need to try to achieve bulging force indirectly, more directly test bulging force and operate the trouble that seems through curve plotting; Need in the test to make an experiment with a plurality of soil samples, taken many instruments, influence the turnover of equipment, this test is the state of saturation of uncontrollable soil sample also.
3. balance pressurization; It is the standard method of " Standard for test methods of earthworks " (GB/T 50123-1999); Its test result relatively meets the physical significance of bulging force; But in the process of the test through Deformation control need repeatedly, load application continually, the damage and the destruction that also can cause the undisturbed soil body structure to a certain extent.Test unit is: the balance pressurization also need be used the operation that makes an experiment of cutting ring and consolidometer.Its process of the test is, with the soil sample consolidometer of packing into, the adjustment dial gauge makes pointer to zero or a certain initial reading; Can add water and expand,, add an amount of loading immediately and make dial gauge keep initial reading when the dial gauge reading increases at the beginning by soil sample; The dial gauge reading increases then loading once more once more and pushes back; Make dial gauge keep initial reading all the time so repeatedly, promptly can be considered stable when the two hours readings of being separated by are constant, added loading is bulging force.
It should be noted that; Though balance pressurization test bulging force has many advantages, also there is very big shortcoming in it: the first, and the process of the test trouble; Need continuous load application to recover initial position to guarantee the dial gauge pointer; And, add how many loads and can't know in advance that this just has higher requirement to the operant level of testing crew; Second; Soil sample finally tends towards stability to pressurizeing repeatedly from beginning continuous imbibition; Balance pressurization test can't be confirmed the state that soil sample is final exactly, can't strict control in the process of the test and definite loading environments at different levels under the soil sample state whether be in state of saturation fully; The 3rd, soil sample can't reach proper state of saturation lacking under the condition of negative pressure that vacuumizes; The 4th, because state of saturation that in test can't the ACTIVE CONTROL soil sample needs to lean on the nature immersion fully saturated; Therefore must cause the experimental test time long, often do the time that single test just needs a couple of days and even tens days, during also do not comprise the failure of test; Disposable if desired a large amount of bulging force tests, the just more personnel of needs, the more instrument done; The cost more time, uneconomical; The 5th, the process of the test trivial operations needs artificial constantly record data in the process of the test; The 6th, this test unit is the state of saturation of uncontrollable soil sample also.
Above test method and equipment respectively have relative merits; The above three kinds of test methods of comprehensive contrast; Subject matter in the bulging force test can reduce: first; Usually bulging force is meant the bulging force that records under the long-pending constant condition of the soil body keeping, and the bulging force that in test, how to guarantee so to test is in the physical sense in strict conformity with the implication of bulging force; The second, how to guarantee in the process of the test that soil structures do not have disturbance, before and after test, can avoid undisturbed soil sample and structural disturbance and the damage of remoulded sample; The 3rd, for the maximum swelling power of measuring, the saturability of warranty test soil sample how; The 4th, how through the ACTIVE CONTROL saturation history, to practice thrift the elapsed time of bulging force test; The 5th, how to avoid shortcomings such as the complicated operation in the classic method test, frequent reading.
Problem and shortage to conventional device existence in the test of conventional expanded power; Utilize advanced technology; Invention, new equipment that development one cover is undisturbed, may command is saturated, few, easy to operate bulging force test consuming time; For the expansion Research on Mechanical Properties of carrying out swelled ground, significant.
Summary of the invention
The purpose of this invention is to provide a kind of saturated soil sample bulging force proving installation of disturbance may command that do not have, effectively overcome big in the test units such as expansion back-pressure method, pressurization plavini and balance pressurization to the soil sample structural perturbation, can not effectively control strict state of saturation and test long problem consuming time.
The technical scheme that the present invention adopted is, a kind of do not have a saturated soil sample bulging force proving installation of disturbance may command, it is characterized in that; Comprise seat support system; Be fixed with on the seat support system level to lower wall, tubular cutting ring seat is installed on the lower wall, be coaxially installed with the tubular cutting ring in tubular cutting ring seat inboard; The top of cutting ring seat is equipped with cover, forms enclosure space between cutting ring seat and the last cover;
On the lower wall and the inboard that is positioned at cutting ring has the center circular groove; Have annular groove around the center circular groove, be placed with soil pressure case in the circular groove of center, the bottom of center circular groove has the hole that the lead that supplies soil pressure case is outwards drawn; Be placed with annular infiltration plate in the annular groove; Evenly have a plurality of immersion circular grooves on the annular infiltration plate, all be placed with permeable stone in each circular groove that soaks, the bottom of annular groove is connected with the external water flood system through pipeline;
Be placed with soil sample between lower wall and the cutting ring, soil sample, the top be placed with permeable panel seat, the bottom of permeable panel seat is inlaid with porous disc, permeable panel seat has the permeable hole that communicates with porous disc;
On cover to open downwards and be provided with center hole; Be provided with plunger in the center hole, the bottom of plunger is against on the permeable panel seat, and the top of last cover is provided with the screw rod of ability up-down adjustment; The bottom of screw rod is against on the plunger, on cover and also be connected with overflow device and vaccum-pumping equipment.
Seat support system comprises movably frame, is fixed with base plate on the frame, through hex bolts the base that is used for fixing lower wall is installed on the base plate.
Lower wall is provided with the outside baffle ring of protruding cutting ring sword pin, and the cutting ring seat is fixed on the outside outside of propping up baffle ring of cutting ring sword pin through screw thread, and cutting ring cooperates the inboard that is placed on the outside baffle ring of cutting ring sword pin.
The external water flood system comprises and is installed in the water box support that covers; The water box of band scale mark is installed on the water box support; The upper end of water box and atmosphere; The bottom of water box is communicated with the water filling conduit, and the water filling duct valve is installed on the water filling conduit, and the other end of water filling conduit is connected with the bottom of annular groove through the pagoda joint that is installed on the lower wall.
Be provided with the rubber cushion ring between cutting ring and the lower wall.
The upper and lower surfaces of soil sample all is placed with filter paper, is placed with filter paper on the porous disc.
The top of last cover is fixed with two columns, through two columns be fixed with level to crossbeam, have tapped through hole straight down on the crossbeam, screw rod is arranged in this tapped through hole.
On cover to open downwards and be provided with overflow device joint and vacuumizing joint, on the overflow device joint overflow device is installed, be connected with the vacuum pump conduit on the vacuumizing joint, the vacuum pump valve is installed on the vacuum pump conduit.
The beneficial effect that the present invention does not have the saturated soil sample bulging force proving installation of disturbance may command is: apparatus of the present invention are applicable to the mensuration of soil sample bulging force, are particularly useful for undisturbed unsaturated expansive soils and the test of reinventing the maximum swelling power of swelled ground under the saturation conditions.Use in the mensuration process of the present invention; First; Directly take undisturbed unsaturated expansive soils appearance through cutting ring, or produce the swelled ground remoulded sample, under the rigid side wall condition, gather the bulging force data through hitting real pressure appearance; Kept the constant of soil sample volume, reduced in the test process disturbance effectively the soil sample structure; The second, through vaccum-pumping equipment the state of saturation of soil sample is carried out ACTIVE CONTROL, guarantee the state of saturation under the stricti jurise condition, thereby reduced the test duration of bulging force effectively; The 3rd, gather the bulging force data through the soil pressure case of high precision, microstrain, effectively guaranteed the precision of test; The 4th; Because soil sample diameter and highly all bigger; Its end restraint effect can reduce greatly, also can effectively reduce the friction force influence between cutting ring wall and the soil through the cutting ring smooth inner wall simultaneously, thereby assurance is positioned over reliability and precision that the soil pressure case of soil sample bottom centre position measures.To sum up, but this test unit have soil sample do not had characteristics such as the disturbance ACTIVE CONTROL is saturated, test is consuming time less, simple in structure, easy to operate and data are reliable.
Description of drawings
Fig. 1 is the structural representation that the present invention does not have the saturated soil sample bulging force proving installation of disturbance may command;
Fig. 2 is the structural representation that covers on the device among the present invention;
Fig. 3 is the structural representation of the device lower wall among the present invention;
Wherein, 1. frame; 2. base plate; 3. base; 4. hex bolts; 5. lower wall; 6. cutting ring seat; 7. baffle ring is propped up in cutting ring sword pin outside; 8. soil sample; 9. cutting ring; 10. center circular groove; 11. hole; 12. soil pressure case; 13. lead; 14. annular infiltration plate; 15. immersion circular groove; 16. pagoda joint; 17. water filling conduit; 18. water box; 19. rubber cushion ring; 20. porous disc; 21. permeable panel seat; 22. permeable hole; 23. plunger; 24. last cover; 25. overflow device joint; 26. vacuumizing joint; 27. column; 28. crossbeam; 29. hexagonal nut; 30. screw rod; 31. first screw; 32. water box support; 33. second screw; 34. overflow device; 35. socket head cap screw; 36. vacuum pump conduit; 37. vacuum pump duct valve; 38. water filling duct valve.
Embodiment
As shown in Figure 1, the present invention is a kind of not to have the saturated soil sample bulging force proving installation of disturbance may command, comprises seat support system.Seat support system plays the integrated support effect in process of the test.Seat support system comprises movably frame 1, is fixed with base plate 2 on the frame 1, through hex bolts 4 base 3 is installed on the base plate 2, base 3 be used for fixing level to lower wall 5.Be coaxially installed with tubular cutting ring seat 6 and tubular cutting ring 9 on the lower wall 5; Concrete mounting means is: lower wall 5 is provided with the outside baffle ring 7 of protruding cutting ring sword pin; Outside baffle ring 7 of cutting ring sword pin can prevent the turn up generation of phenomenon of the cutting ring 9 sword pin that cause after soil sample 8 expands in the process of the test; Both can prevent the lateral expansion of swelled ground volume, can prevent the damage of cutting ring 9 parts again.Cutting ring seat 6 is fixed on the outside outside of propping up baffle ring 7 of cutting ring sword pin through screw thread, and cutting ring 9 cooperates the inboard that is placed on the outside baffle ring 7 of cutting ring sword pin, is provided with rubber cushion ring 19 between cutting ring 9 and the lower wall 5.Rubber cushion ring 19 can play the effect of sealing in vacuum.The top of cutting ring seat 6 is equipped with cover 24 through two socket head cap screws 35, forms enclosure space between cutting ring seat 6 and the last cover 24.
In conjunction with shown in Figure 3; Cutting ring seat 6 with in the enclosure space that forms of cover 24; On the lower wall 5 and inboard that is positioned at cutting ring 9 has center circular groove 10, has annular groove around center circular groove 10, is placed with soil pressure case 12 in the center circular groove 10; The bottom of center circular groove 10 has hole 11, and hole 11 is used to supply the lead 13 of soil pressure case 12 outwards to draw.Lead 13 is drawn the back through hole 11 and is connected outside data acquisition system (DAS).Data acquisition system (DAS) is used for carrying out data acquisition in process of the test.Annular groove is used to arrange the water filling path, is placed with annular infiltration plate 14 in the annular groove, the upper surface of the annular infiltration plate 14 after placing and the flush of soil pressure case 12.Annular infiltration plate 14 circumferentially evenly has three immersion circular grooves 15, to strengthen the soil sample 8 saturated homogeneity of in the immersion process, soaking.All be placed with permeable stone in each circular groove 15 that soaks, the bottom of annular groove is connected with the external water flood system through pipeline.Be placed with soil sample 8 between lower wall 5 and the cutting ring 9.The top of soil sample 8 is placed with permeable panel seat 21, and the bottom of permeable panel seat 21 is inlaid with porous disc 20, and the lower surface of porous disc 20 closely contacts with the upper surface of soil sample 8, permeable panel seat 21 have communicate with porous disc 20 about two permeable holes 22.Permeable hole 22 can impel the favourable discharge of porous disc 20 surrounding airs after the test water filling.The upper and lower surfaces of soil sample 8 all is placed with filter paper, is placed with filter paper on the porous disc 20.
In conjunction with shown in Figure 2, on cover to open downwards on 24 and be provided with center hole, be provided with plunger 23 in the center hole, the bottom of plunger 23 is against on the permeable panel seat 21, on cover 24 top be provided with can up-down adjustment screw rod 30, the bottom of screw rod 30 is against on the plunger 23.Screw rod 30 can apply certain pressure in advance, fully guaranteed soil sample 8 respectively with tight contact the on porous disc 20 and lower wall 5 two planes, to improve results precision.Also be connected with overflow device and vaccum-pumping equipment on the last cover 24.The top of last cover 24 be fixed with 27, two columns 27 of two columns through two hexagonal nuts 29 be fixed with level to crossbeam 28, have tapped through hole straight down on the crossbeam 28, screw rod 30 is arranged in this tapped through hole.Open downwards on the last cover 24 and be provided with overflow device joint 25 and vacuumizing joint 26, overflow device 34 is installed on the overflow device joint 25, overflow device 34 adopts organic glass to process.Be connected with vacuum pump conduit 36 on the vacuumizing joint 26, vacuum pump valve 37 is installed on the vacuum pump conduit 36.
The external water flood system comprises through two first screws 31 and is installed in the water box support 32 of cover on 24; Through four second screws 33 the water box 18 of being with scale mark is installed on the water box support 32; The upper end of water box 18 and atmosphere; The bottom of water box 18 is communicated with water filling conduit 17, and water filling duct valve 38 is installed on the water filling conduit 17, and the other end of water filling conduit 17 is connected with the bottom of annular groove through the pagoda joint 16 that is installed on the lower wall 5.
During test, close the water filling duct valve 38 of water filling conduit 17, in water box 18, inject water, the scale mark of the water surface in the record water box 18 this moment.Open vacuum pump duct valve 37, open vaccum-pumping equipment.After vacuumizing completion, close vacuum pump duct valve 37, carry out the record first time through data acquisition system (DAS) to data this moment.Open water filling duct valve 38, water is flowed out.Water contacts through the annular infiltration plate 14 in the water filling conduit 17 entering lower walls 5 and with soil sample 8, and soil sample 8 begins immersion.When treating to see the water surface through overflow device 34, water filling finishes, and closes water filling duct valve 38, and the position of water surface scale mark in the record water box 18 this moment.Begin to expand after soil sample 8 immersions, observe the variation of data in the external data acquisition system, after pending data is stable, data are carried out the record second time.
Above test operation is applicable to swelled ground undisturbed soil sample and swelled ground remoulded sample, and both differences only are the preparation process of soil sample.The swelled ground undisturbed soil sample is directly to take in the scene with the cutting ring 9 of big rigidity, and with the soil sample of cutting native cutter leveling cutting ring 9 two ends, the operation that makes an experiment gets final product during test; Earlier air-dry swelled ground undisturbed soil sample is pulverized, sieves, mixes thoroughly when the swelled ground remoulded sample then is sample preparation; Adding water by desired moisture content with sprayer then mixes thoroughly again; Preserve moisture leave standstill diel after; Layering is hit real in required density, requires the sample preparation error of water cut and density all to be controlled in 1%.
The present invention is in carrying out soil sample bulging force test process:
1, through using cutting ring 9 to realize soil sample 8 has been realized that in rigid side wall strict CONTROL VOLUME is constant, therefore, the make an experiment bulging force of test of the present invention more strictly meets the physical significance of maximum swelling power.
2, all can make an experiment to testing undisturbed unsaturated expansive soils appearance and reinventing the expansion soil sample.
3, the cooperation through screw rod 30 and plunger 23, to the precompressed that applies of soil sample 8, fully guaranteed soil sample 8 respectively with tight contact the on 5 two planes of porous disc 20 and lower wall.
4, special large diameter cutting ring 9 can directly be adopted undisturbed soil sample 8, during test cutting ring 9 is directly put into proving installation, has reduced sampling and test and has prepared in two processes the disturbance to the expansion soil sample.
5, in the bulging force test process to test undisturbed unsaturated expansive soils appearance and reinvent the expansion soil sample and all do not have disturbance, be consistent before can guaranteeing undisturbed unsaturated expansive soils appearance and reinventing swelled ground spline structure and test.
6, guaranteed that through vaccum-pumping equipment the expansion soil sample can finally be in complete state of saturation, technological means is provided, effectively reduced the time that test consumes simultaneously for measuring maximum swelling power.
7, have annular infiltration plate 14 on the lower wall 5; Annular infiltration plate 14 circumferentially evenly has a plurality of immersion circular grooves 15; Control soil sample 8 immersions that can be stricter in vacuumizing saturation history, saturated homogeneity; Fully guaranteed the saturability of whole soil sample 8, made soil sample 8 be in strict state of saturation all the time.
8, the bulging force reading adopts soil pressure case 12 tests, and signal accurately, has efficiently reduced the consumption of human and material resources, financial resources and time.
9, soil pressure case 12 is positioned over soil sample 8 bottom centre positions; On the one hand; Can effectively reduce the friction force influence between cutting ring wall and the soil through special cutting ring smooth inner wall when sampling and test; On the other hand, because test soil sample 8 diameters and highly all bigger, its end restraint effect also can reduce greatly.
10, instrumentation is easy, and testing crew is not had higher technology, experience requirement, and has guaranteed the success ratio of test.
Claims (8)
1. one kind is not had the saturated soil sample bulging force proving installation of disturbance may command; It is characterized in that, comprise seat support system, be fixed with on the said seat support system level to lower wall (5); Tubular cutting ring seat (6) is installed on the said lower wall (5); Be coaxially installed with tubular cutting ring (9) in said tubular cutting ring seat (6) inboard, the top of said cutting ring seat (6) is equipped with cover (24), forms enclosure space between said cutting ring seat (6) and the last cover (24);
Said lower wall (5) is gone up and the inboard that is positioned at cutting ring (9) has center circular groove (10); Have annular groove around said center circular groove (10); Be placed with soil pressure case (12) in the said center circular groove (10); The bottom of said center circular groove (10) has the hole (11) that the lead (13) that supplies soil pressure case (12) is outwards drawn, and is placed with annular infiltration plate (14) in the said annular groove, evenly has a plurality of immersion circular grooves (15) on the said annular infiltration plate (14); All be placed with permeable stone in the said circular groove (15) that respectively soaks, the bottom of said annular groove is connected with the external water flood system through pipeline;
Be placed with soil sample (8) between said lower wall (5) and the cutting ring (9); The top of said soil sample (8) is placed with permeable panel seat (21); The bottom of said permeable panel seat (21) is inlaid with porous disc (20), and said permeable panel seat (21) has the permeable hole (22) that communicates with porous disc (20);
Open downwards on the said upward cover (24) and be provided with center hole; Be provided with plunger (23) in the said center hole; The bottom of said plunger (23) is against on the permeable panel seat (21); Said top of going up cover (24) is provided with the screw rod (30) of ability up-down adjustment, and the bottom of said screw rod (30) is against on the plunger (23), and said going up on the cover (24) also is connected with overflow device and vaccum-pumping equipment.
2. according to the saturated soil sample bulging force proving installation of the described no disturbance may command of claim 1; It is characterized in that; Said seat support system comprises movably frame (1); Be fixed with base plate (2) on the said frame (1), said base plate (2) is gone up and through hex bolts (4) base (3) that is used for fixing lower wall (5) is installed.
3. according to the saturated soil sample bulging force proving installation of the described no disturbance may command of claim 1; It is characterized in that; Said lower wall (5) is provided with the outside baffle ring (7) of protruding cutting ring sword pin; Said cutting ring seat (6) is fixed on the outside outside of propping up baffle ring (7) of cutting ring sword pin through screw thread, and said cutting ring (9) cooperates the inboard that is placed on the outside baffle ring (7) of cutting ring sword pin.
4. according to the saturated soil sample bulging force proving installation of the described no disturbance may command of claim 1; It is characterized in that; Said external water flood system comprises the water box support (32) that is installed on the cover (24); The water box (18) of band scale mark is installed on the said water box support (32), the upper end and the atmosphere of said water box (18), the bottom of said water box (18) is communicated with water filling conduit (17); Water filling duct valve (38) is installed on the said water filling conduit (17), and the other end of said water filling conduit (17) is connected with the bottom of annular groove through the pagoda joint (16) that is installed on the lower wall (5).
5. according to the saturated soil sample bulging force proving installation of the described no disturbance may command of claim 1, it is characterized in that, be provided with rubber cushion ring (19) between said cutting ring (9) and the lower wall (5).
6. according to the saturated soil sample bulging force proving installation of the described no disturbance may command of claim 1, it is characterized in that the upper and lower surfaces of said soil sample (8) all is placed with filter paper, said porous disc is placed with filter paper on (20).
7. according to the saturated soil sample bulging force proving installation of the described no disturbance may command of claim 1; It is characterized in that; Said top of going up cover (24) is fixed with two columns (27); Through said two columns (27) be fixed with level to crossbeam (28), said crossbeam has tapped through hole straight down on (28), said screw rod (30) is arranged in this tapped through hole.
8. according to the saturated soil sample bulging force proving installation of the described no disturbance may command of claim 1; It is characterized in that; Open downwards on the said upward cover (24) and be provided with overflow device joint (25) and vacuumizing joint (26); Overflow device (34) is installed on the said overflow device joint (25), is connected with vacuum pump conduit (36) on the said vacuumizing joint (26), vacuum pump valve (37) is installed on the said vacuum pump conduit (36).
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