CN103344501A - Large geotechnical triaxial creep test system - Google Patents
Large geotechnical triaxial creep test system Download PDFInfo
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- CN103344501A CN103344501A CN2013103084860A CN201310308486A CN103344501A CN 103344501 A CN103344501 A CN 103344501A CN 2013103084860 A CN2013103084860 A CN 2013103084860A CN 201310308486 A CN201310308486 A CN 201310308486A CN 103344501 A CN103344501 A CN 103344501A
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Abstract
The invention provides a large geotechnical triaxial creep test system, comprising a host computer, a triaxial pressure chamber, an axial weight loading device, an axial-pressure servo loading cylinder, an axial-pressure hydraulic source, a peripheral weight loading device, a peripheral-pressure servo loading cylinder, a peripheral-pressure hydraulic source, a vapor system and a computer measurement and control system, wherein an axial loading cylinder and a peripheral loading cylinder are arranged on the host computer; an axial-pressure displacement sensor is arranged on the axial loading cylinder; a peripheral-pressure displacement sensor is arranged on the peripheral loading cylinder; a first load sensor and a second load sensor are arranged below the axial loading cylinder; the triaxial pressure chamber is arranged inside the host computer and connected with the second load sensor; an axial-pressure servo motor is arranged on the axial-pressure servo loading cylinder; and a peripheral-pressure servo motor is arranged on the peripheral-pressure servo loading cylinder. By adopting the large geotechnical triaxial creep test system with the structure, long-term keeping of constant pressure is ensured; noise pollution is reduced; and meanwhile, the reliability is improved.
Description
Technical field
The present invention relates to a kind of creep test system, relate in particular to a kind of large geotechnical three axis creep test system.
Background technology
In soil test, the three axis creep test instrument has become measures the requisite common instrument of ground distortion index.The creep of Geotechnical Engineering material (rheology) test need keep carrying out the measurement of sample deformation characteristic under the long constant loading condition.
The constant load technology of existing maintenance is generally passed through air compressor, oil sources, ball-screw, or closed-loop system is set, and long-term constant pressure is provided.This technology relies on big to power, especially under the irretentive situation of electric power, be difficult to reach the requirement that keeps dead load for a long time, and produces lasting noise, and surrounding environment is caused serious noise pollution.
In addition, existing three axis creep test instrument generally only uses the routine measurement instrument that experimental data is gathered, and reliability is not high.
In view of this, be necessary three axis creep test instrument of the prior art is improved, to address the above problem.
Summary of the invention
The object of the present invention is to provide a kind of large geotechnical three axis creep test system, it adopts the constant load technology of counterweight loading, and high-precision sensor is set, simultaneously data are carried out dual collection with conventional instrument, guarantee the long-term maintenance of constant pressure, reduce noise pollution, improve reliability simultaneously.
For achieving the above object, the invention provides a kind of large geotechnical three axis creep test system, comprise: main frame, this main frame is equipped with axial load cylinder and encloses to load cylinder, this axial load cylinder is equipped with the axial compression displacement transducer, this encloses to load cylinder the confined pressure displacement transducer is housed, and this axial load cylinder is divided into first load sensor and second load sensor; The triaxial cell, this triaxial cell places in this main frame, and is connected with this second load sensor; Axial counterweight loading system; The servo load cylinder of axial compression is equipped with the axial compression servomotor on the servo load cylinder of this axial compression; The axial compression hydraulic power source; Enclose to the counterweight loading system; The servo load cylinder of confined pressure is equipped with the confined pressure servomotor on the servo load cylinder of this confined pressure; The confined pressure hydraulic power source; Water-steam system; And computer measurement and control system;
This axial counterweight loading system is connected with this axial load cylinder, the servo load cylinder of axial compression and axial compression hydraulic power source; The servo load cylinder of this axial compression is connected with this axial load cylinder and axial compression hydraulic power source; This axial compression hydraulic power source is connected with this axial load cylinder;
This encloses to enclose to load cylinder, the servo load cylinder of confined pressure and confined pressure hydraulic power source to counterweight loading system and this and is connected; The servo load cylinder of this confined pressure encloses to load cylinder and confined pressure hydraulic power source with this and is connected; This confined pressure hydraulic power source encloses to load cylinder with this and is connected;
This water-steam system is connected with this triaxial cell;
This computer measurement and control system is connected with this axial compression displacement transducer, confined pressure displacement transducer, first load sensor, second load sensor, triaxial cell, axial compression servomotor, confined pressure servomotor, axial compression hydraulic power source, confined pressure hydraulic power source and water-steam system.
Further, this first load sensor and second load sensor are respectively 1000KN load sensor and 100KN load sensor.
Further, this axial counterweight loading system comprises: axial compression loaded seat, the upright thick stick of axial compression and axial compression entablature, and this axial compression loaded seat, axial compression entablature and two upright thick sticks of axial compression are fixed by nut, constitute rectangular frame structure;
This axial compression loaded seat, axial compression is housed holds up counterweight lift cylinders and axial compression picking-up counterweight lift cylinders operation valve, this axial compression holds up counterweight lift cylinders bottom, be fixedly installed in this axial compression loaded seat by screw, this axial compression holds up counterweight lift cylinders upper end the axial compression transition disc is housed, and on this axial compression transition disc the axial compression weight tray is housed;
The upright thick stick of this axial compression is equipped with the axial compression travel switch;
This axial compression entablature, axial compression is housed forms cylinder and axial compression hydraulic control one-way valve, this axial compression forms the cylinder bottom, through this axial compression entablature, and be screwed, this axial compression forms the cylinder upper end spheric seating in axial compression lower peripheral surface seat and the axial compression is housed, between the spheric seating axial compression steel ball is housed in this axial compression lower peripheral surface seat and the axial compression, the axial compression reverser passes this axial compression entablature, and this axial compression reverser upper end places in this axial compression on the spheric seating, and the axial compression pitman shaft is equipped with in the lower end, on this axial compression pitman shaft axial compression centering dish is housed and the axial compression counterweight is hung, this axial compression counterweight is hung, and 0.6Mpa axial compression counterweight is equipped with in bottom, and 0.05Mpa axial compression counterweight and 0.01Mpa axial compression counterweight are equipped with in the top.
Further, this encloses to the counterweight loading system and comprises confined pressure loaded seat, the upright thick stick of confined pressure and confined pressure entablature, and this confined pressure loaded seat, confined pressure entablature and two upright thick sticks of confined pressure are fixed by nut, constitute rectangular frame structure;
This confined pressure loaded seat, confined pressure is housed holds up counterweight lift cylinders and confined pressure picking-up counterweight lift cylinders operation valve, this confined pressure holds up counterweight lift cylinders bottom, be fixedly installed in this confined pressure loaded seat by screw, this confined pressure holds up counterweight lift cylinders upper end the confined pressure transition disc is housed, and on this confined pressure transition disc the confined pressure weight tray is housed;
The upright thick stick of this confined pressure is equipped with the confined pressure travel switch;
This confined pressure entablature, confined pressure is housed forms cylinder and confined pressure hydraulic control one-way valve, this confined pressure forms the cylinder bottom, through this confined pressure entablature, and be screwed, this confined pressure forms the cylinder upper end spheric seating on confined pressure lower peripheral surface seat and the confined pressure is housed, between the spheric seating confined pressure steel ball is housed on this confined pressure lower peripheral surface seat and the confined pressure, the confined pressure reverser passes this confined pressure entablature, and this encloses reverser upper end and places on this confined pressure on the spheric seating, and the confined pressure pitman shaft is equipped with in the lower end, on this confined pressure pitman shaft confined pressure centering dish is housed and the confined pressure counterweight is hung, this confined pressure counterweight is hung, and 0.5Mpa confined pressure counterweight is equipped with in bottom, and 0.05Mpa confined pressure counterweight and 0.01Mpa confined pressure counterweight are equipped with in the top.
Further, this axial compression picking-up counterweight lift cylinders is connected with this axial compression hydraulic power source; This axial compression forms cylinder and is connected with this axial compression hydraulic power source, the servo load cylinder of axial compression and axial load cylinder.
Further, this confined pressure picking-up counterweight lift cylinders is connected with this confined pressure hydraulic power source; This confined pressure forms cylinder with this confined pressure hydraulic power source, the servo load cylinder of confined pressure and encloses to load cylinder and is connected.
Further, this axial load cylinder and enclose to the diameter of load cylinder and be respectively 300mm and 130mm.
Further, the diameter of this axial compression formation cylinder and confined pressure formation cylinder is 35mm.
Further, the quantity of this 0.05Mpa axial compression counterweight, 0.01Mpa axial compression counterweight, 0.05Mpa confined pressure counterweight and 0.01Mpa confined pressure counterweight is four; The quantity of this 0.6Mpa axial compression counterweight is 17; The quantity of this 0.5Mpa confined pressure counterweight is seven.
Compared with prior art, the invention has the beneficial effects as follows: by a kind of large geotechnical creep test system is provided, adopt axial counterweight loading system and enclose to the counterweight charger, and high-precision sensor is set, it has guaranteed the long-term maintenance of constant pressure, reduce noise pollution, improved the reliability of system simultaneously.
Description of drawings
Fig. 1 is the synoptic diagram of large geotechnical three axis creep test of the present invention system;
Fig. 2 is the structural representation of axial counterweight loading system;
Fig. 3 is the structural representation that encloses to the counterweight loading system.
Embodiment
The present invention is described in detail below in conjunction with each embodiment shown in the drawings; but should be noted that; these embodiments are not limitation of the present invention; the function that those of ordinary skills do according to these embodiments, method or structural equivalent transformation or alternative all belong within protection scope of the present invention.
Join shown in Figure 1ly, Fig. 1 is the synoptic diagram of large geotechnical three axis creep test of the present invention system.
In the present embodiment, large geotechnical three axis creep test system comprises:
Main frame 1, this main frame 1 is equipped with axial load cylinder 101 and encloses to load cylinder 102, this axial load cylinder 101 is equipped with axial compression displacement transducer 103, this encloses to load cylinder 102 confined pressure displacement transducer 104 is housed, and this axial load cylinder 101 is divided into first load sensor 105 and second load sensor 106; Triaxial cell 2, this triaxial cell 2 places in this main frame 1, and is connected with this second load sensor 106; Axial counterweight loading system 3; The servo load cylinder 4 of axial compression is equipped with axial compression servomotor 5 on the servo load cylinder 4 of this axial compression; Axial compression hydraulic power source 6; Enclose to counterweight loading system 7; The servo load cylinder 8 of confined pressure is equipped with confined pressure servomotor 9 on the servo load cylinder 8 of this confined pressure; Confined pressure hydraulic power source 10; Water-steam system 11; And computer measurement and control system 12;
This axial counterweight loading system 3 is connected with this axial load cylinder 101, the servo load cylinder 4 of axial compression and axial compression hydraulic power source 6; The servo load cylinder 4 of this axial compression is connected with this axial load cylinder 101 and axial compression hydraulic power source 6; This axial compression hydraulic power source 6 is connected with this axial load cylinder 101;
This encloses to enclose to load cylinder 102, the servo load cylinder 8 of confined pressure and confined pressure hydraulic power source 10 to counterweight loading system 7 and this and is connected; The servo load cylinder 8 of this confined pressure encloses to load cylinder 102 and confined pressure hydraulic power source 10 with this and is connected; This confined pressure hydraulic power source 10 encloses to load cylinder 102 with this and is connected;
This water-steam system 11 is connected with this triaxial cell 2;
This computer measurement and control system 12 is connected with this axial compression displacement transducer 103, confined pressure displacement transducer 104, first load sensor 105, second load sensor 106, triaxial cell 2, axial compression servomotor 5, confined pressure servomotor 9, axial compression hydraulic power source 6, confined pressure hydraulic power source 10 and water-steam system 11;
This axial load cylinder 101(vat) and enclose the vat to load cylinder 102() diameter be respectively 300mm and 130mm;
This first load sensor 105 and second load sensor 106 are respectively 1000KN load sensor and 100KN load sensor.
Ginseng Fig. 2 and shown in Figure 1, Fig. 2 is the structural representation of axial counterweight loading system; Fig. 1 is the synoptic diagram of large geotechnical three axis creep test of the present invention system.
This axial counterweight loading system 3 comprises: the upright thick stick 302 of axial compression loaded seat 301, axial compression and axial compression entablature 303, the upright thick stick of this axial compression loaded seat 301, axial compression entablature 303 and two axial compressions 302 are fixed by nut, constitute rectangular frame structure;
This axial compression loaded seat 301, axial compression is housed holds up counterweight lift cylinders 304 and axial compression picking-up counterweight lift cylinders operation valve 305, this axial compression holds up counterweight lift cylinders 304 bottoms, be fixedly installed in this axial compression loaded seat 301 by screw, this axial compression holds up counterweight lift cylinders 304 upper ends axial compression transition disc 306 is housed, and on this axial compression transition disc 306 axial compression weight tray 307 is housed;
The upright thick stick 302 of this axial compression is equipped with axial compression travel switch 308;
This axial compression entablature 303, axial compression is housed forms cylinder 309 and axial compression hydraulic control one-way valve 310, this axial compression forms cylinder 309 bottoms, through this axial compression entablature 303, and be screwed, this axial compression forms cylinder 309 upper ends spheric seating 312 in axial compression lower peripheral surface seat 311 and the axial compression is housed, between the spheric seating 312 axial compression steel ball 313 is housed in this axial compression lower peripheral surface seat 311 and the axial compression, axial compression reverser 314 passes this axial compression entablature 303, these axial compression reverser 314 upper ends place in this axial compression on the spheric seating 312, axial compression pitman shaft 315 is equipped with in the lower end, axial compression centering dish 316 and axial compression counterweight are housed on this axial compression pitman shaft 315 hang 317, this axial compression counterweight hangs 317, and 0.6Mpa axial compression counterweight 318 is equipped with in bottom, and 0.05Mpa axial compression counterweight 319 and 0.01Mpa axial compression counterweight 320 are equipped with in the top;
The little cylinder of this axial compression formation cylinder 309() diameter is 35mm;
The quantity of this 0.6Mpa axial compression counterweight 318 is 17;
The quantity of this 0.05Mpa axial compression counterweight 319 and 0.01Mpa axial compression counterweight 320 is four;
This axial compression holds up counterweight lift cylinders 304 and is connected with this axial compression hydraulic power source 6, and this axial compression forms cylinder 309 and is connected with this axial compression hydraulic power source 6, the servo load cylinder 4 of axial compression and axial load cylinder 101.
Ginseng Fig. 3 and shown in Figure 1, Fig. 3 is the structural representation that encloses to the counterweight loading system; Fig. 1 is the synoptic diagram of large geotechnical three axis creep test of the present invention system.
This encloses to counterweight loading system 7 and comprises the upright thick stick 702 of confined pressure loaded seat 701, confined pressure and confined pressure entablature 703, and the upright thick stick of this confined pressure loaded seat 701, confined pressure entablature 703 and two confined pressures 702 is fixed by nut, constitutes rectangular frame structure;
This confined pressure loaded seat 701, confined pressure is housed holds up counterweight lift cylinders 704 and confined pressure picking-up counterweight lift cylinders operation valve 705, this confined pressure holds up counterweight lift cylinders 704 bottoms, be fixedly installed in this confined pressure loaded seat 701 by screw, this confined pressure holds up counterweight lift cylinders 704 upper ends confined pressure transition disc 706 is housed, and on this confined pressure transition disc 706 confined pressure weight tray 707 is housed;
The upright thick stick 702 of this confined pressure is equipped with confined pressure travel switch 708;
This confined pressure entablature 703, confined pressure is housed forms cylinder 709 and confined pressure hydraulic control one-way valve 710, this confined pressure forms cylinder 709 bottoms, through this confined pressure entablature 703, and be screwed, this confined pressure forms cylinder 709 upper ends spheric seating 712 on confined pressure lower peripheral surface seat 711 and the confined pressure is housed, between the spheric seating 712 confined pressure steel ball 713 is housed on this confined pressure lower peripheral surface seat 711 and the confined pressure, confined pressure reverser 714 passes this confined pressure entablature 703, this encloses reverser 714 upper ends and places on this confined pressure on the spheric seating 712, confined pressure pitman shaft 715 is equipped with in the lower end, confined pressure centering dish 716 and confined pressure counterweight are housed on this confined pressure pitman shaft 715 hang 717, this confined pressure counterweight hangs 717, and 0.5Mpa confined pressure counterweight 718 is equipped with in bottom, and 0.05Mpa confined pressure counterweight 719 and 0.01Mpa confined pressure counterweight 720 are equipped with in the top;
The little cylinder of this confined pressure formation cylinder 709(), diameter is 35mm;
The quantity of this 0.5Mpa confined pressure counterweight 718 is seven;
The quantity of this 0.05Mpa confined pressure counterweight 719 and 0.01Mpa confined pressure counterweight 720 is four;
This confined pressure holds up counterweight lift cylinders 704 and is connected with this confined pressure hydraulic power source 10, and this confined pressure forms cylinder 709 with this confined pressure hydraulic power source 10, the servo load cylinder 8 of confined pressure and encloses to load cylinder 102 and is connected.
In the present embodiment, this large geotechnical three axis creep test system is used for measuring under the constant load effect, axial and cubic deformation and the time relation of the soil body, can measure the cubic deformation of sample under the unsaturated state, and have the shearing function under the strain and stress control.It is placed in this triaxial cell 2 by gravel, sand, soil being formed in accordance with regulations circular specimen, utilizes this axial counterweight loading system 3 and enclose to counterweight loading system 7 to produce axle pressures and enclose to pressure, and sample is carried out loading; And utilize this computing machine to survey system 12 processed, and control this axial compression servomotor 5 and confined pressure servomotor 9, drive the closed-loop system of the servo load cylinder 4 of this axial compression and the servo load cylinder 8 of confined pressure, the sample axle pressure is compensated with enclosing to the subtle change of pressure.Be implemented under the condition of long-term maintenance constant pressure, to measurement and the research of sample deformation characteristic.
In the present embodiment, this large geotechnical three axis creep test system, the mode by " little cylinder band vat " is converted into big load to miniweights, and keeps the load long-term stability; Simultaneously, produce larger volume pressure oil, adapt to the volume change of large-scale triaxial creepage sample.Below respectively with this axial counterweight loading system 3 and to enclose to counterweight loading system 7 be that example specifies:
In this axial counterweight loading system 3, this axial compression forms the little cylinder of cylinder 309(), in establish isodiametric valve piston.This axial load cylinder 101(vat), establish isodiametric big piston in.With Weight gravity F
1Be applied on the valve piston, this axial compression forms the little cylinder of cylinder 309() the middle pressure P that produces
1By the oil pressure transmission, with this pressure P
1Pass to this axial load cylinder 101(vat), and to big piston formation pressure F
2By the piston of this triaxial cell 2, this axial load cylinder 101(vat) big piston is with F
2Pass to creep sample, form xial feed.According to Principles of Statics, as can be known: F
2=73.469F
1Therefore, by this " little cylinder band vat " device, Weight gravity F
1Be exaggerated 73.469 times, axial action is in creep sample, and can keep load long-term stability (the longest load time can up to 6 months).
This encloses in counterweight loading system 7, and this confined pressure forms the little cylinder of cylinder 709(), in establish isodiametric valve piston.This encloses the vat to load cylinder 102() in establish isodiametric big piston.Big piston links to each other with bottom water vat (diameter is 130mm) intermediate diameters piston by link rod, and the water body UNICOM of water vat and this triaxial cell 2 is to adapt to the volume change of large-scale three samples; Displacement by piston in high-precision these confined pressure displacement transducer 104 measurement large tanks, calculate the variation of the water yield in the water vat, represent the variation of water body in this triaxial cell 2 with this, and with this volume change as the triaxial creepage sample (when creep sample was unsaturation, this body change was known as the unsaturation body and becomes).Miniweights gravity is applied on this valve piston, and this confined pressure forms the little cylinder of cylinder 709() in produce pressure, and be delivered to this and enclose the vat to load cylinder 102(); Big piston passes to equivalent pressure on the water body of water vat and this triaxial cell 2 by link rod and water vat piston, and creep sample is formed confined pressure, and keeps the load long-term stability.
This large geotechnical three axis creep test system by this structure, it adopts the constant load technology of counterweight loading, mode by " little cylinder band vat ", and high-precision sensor is set, guaranteed the long-term maintenance of constant pressure, reduce noise pollution, adapted to the volume change of large-scale triaxial creepage sample, improved reliability simultaneously.
Above listed a series of detailed description only is specifying at feasibility embodiment of the present invention; they are not in order to limiting protection scope of the present invention, allly do not break away from equivalent embodiment or the change that skill spirit of the present invention does and all should be included within protection scope of the present invention.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and under the situation that does not deviate from spirit of the present invention or essential characteristic, can realize the present invention with other concrete form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present invention is limited by claims rather than above-mentioned explanation, therefore is intended to include in the present invention dropping on the implication that is equal to important document of claim and all changes in the scope.Any Reference numeral in the claim should be considered as limit related claim.
In addition, be to be understood that, though this instructions is described according to embodiment, but be not that each embodiment only comprises an independently technical scheme, this narrating mode of instructions only is for clarity sake, those skilled in the art should make instructions as a whole, and the technical scheme among each embodiment also can form other embodiments that it will be appreciated by those skilled in the art that through appropriate combination.
Claims (9)
1. large geotechnical three axis creep test system, it is characterized in that, comprise: main frame (1), this main frame (1) is equipped with axial load cylinder (101) and encloses to load cylinder (102), described axial load cylinder (101) is equipped with axial compression displacement transducer (103), described enclosing to load cylinder (102) is equipped with confined pressure displacement transducer (104), and described axial load cylinder (101) is divided into first load sensor (105) and second load sensor (106); Triaxial cell (2), described triaxial cell (2) place in the described main frame (1), and are connected with described second load sensor (106); Axial counterweight loading system (3); The servo load cylinder of axial compression (4) is equipped with axial compression servomotor (5) on the servo load cylinder of described axial compression (4); Axial compression hydraulic power source (6); Enclose to counterweight loading system (7); The servo load cylinder of confined pressure (8) is equipped with confined pressure servomotor (9) on the servo load cylinder of described confined pressure (8); Confined pressure hydraulic power source (10); Water-steam system (11); And computer measurement and control system (12);
Described axial counterweight loading system (3) is connected with described axial load cylinder (101), the servo load cylinder of axial compression (4) and axial compression hydraulic power source (6); The servo load cylinder of described axial compression (4) is connected with described axial load cylinder (101) and axial compression hydraulic power source (6); Described axial compression hydraulic power source (6) is connected with described axial load cylinder (101);
Described enclosing to counterweight loading system (7) is connected with described enclosing to load cylinder (102), the servo load cylinder of confined pressure (8) and confined pressure hydraulic power source (10); The servo load cylinder of described confined pressure (8) is connected with described enclosing to load cylinder (102) and confined pressure hydraulic power source (10); Described confined pressure hydraulic power source (10) is connected with described enclosing to load cylinder (102);
Described water-steam system (11) is connected with described triaxial cell (2);
Described computer measurement and control system (12) is connected with described axial compression displacement transducer (103), confined pressure displacement transducer (104), first load sensor (105), second load sensor (106), triaxial cell (2), axial compression servomotor (5), confined pressure servomotor (9), axial compression hydraulic power source (6), confined pressure hydraulic power source (10) and water-steam system (11).
2. large geotechnical three axis creep test according to claim 1 system is characterized in that described first load sensor (105) and second load sensor (106) are respectively 1000KN load sensor and 100KN load sensor.
3. large geotechnical three axis creep test according to claim 1 system, it is characterized in that, described axial counterweight loading system (3), comprise: axial compression loaded seat (301), the upright thick stick (302) of axial compression and axial compression entablature (303), the upright thick stick of described axial compression loaded seat (301), axial compression entablature (303) and two axial compressions 302 is fixed by nut, constitutes rectangular frame structure;
Described axial compression loaded seat (301), axial compression is housed holds up counterweight lift cylinders (304) and axial compression picking-up counterweight lift cylinders operation valve (305), described axial compression holds up counterweight lift cylinders (304) bottom, be fixedly installed in the described axial compression loaded seat (301) by screw, described axial compression holds up counterweight lift cylinders (304) upper end axial compression transition disc (306) is housed, and axial compression weight tray (307) is housed on the described axial compression transition disc (306);
Described axial compression is found thick stick (302) axial compression travel switch (308) is housed;
Described axial compression entablature (303), axial compression is housed forms cylinder (309) and axial compression hydraulic control one-way valve (310), described axial compression forms cylinder (309) bottom, through described axial compression entablature (303), and be screwed, described axial compression forms cylinder (309) upper end spheric seating (312) in axial compression lower peripheral surface seat (311) and the axial compression is housed, axial compression steel ball (313) is housed between the spheric seating (312) in described axial compression lower peripheral surface seat (311) and the axial compression, axial compression reverser (314) passes described axial compression entablature (303), described axial compression reverser (314) upper end places on the spheric seating in the described axial compression (312), axial compression pitman shaft (315) is equipped with in the lower end, axial compression centering dish (316) and axial compression counterweight are housed on the described axial compression pitman shaft (315) hang (317), described axial compression counterweight is hung (317), 0.6Mpa axial compression counterweight (318) is equipped with in bottom, and 0.05Mpa axial compression counterweight (319) and 0.01Mpa axial compression counterweight (320) are equipped with in the top.
4. large geotechnical three axis creep test according to claim 1 system, it is characterized in that, described enclosing to counterweight loading system (7) comprises confined pressure loaded seat (701), the upright thick stick (702) of confined pressure and confined pressure entablature (703), described confined pressure loaded seat (701), confined pressure entablature (703) and two upright thick sticks (702) of confined pressure are fixed by nut, constitute rectangular frame structure;
Described confined pressure loaded seat (701), confined pressure is housed holds up counterweight lift cylinders (704) and confined pressure picking-up counterweight lift cylinders operation valve (705), described confined pressure holds up counterweight lift cylinders (704) bottom, be fixedly installed in the described confined pressure loaded seat (701) by screw, described confined pressure holds up counterweight lift cylinders (704) upper end confined pressure transition disc (706) is housed, and confined pressure weight tray (707) is housed on the described confined pressure transition disc (706);
Described confined pressure is found thick stick (702) confined pressure travel switch (708) is housed;
Described confined pressure entablature (703), confined pressure is housed forms cylinder (709) and confined pressure hydraulic control one-way valve (710), described confined pressure forms cylinder (709) bottom, through described confined pressure entablature (703), and be screwed, described confined pressure forms cylinder (709) upper end spheric seating (712) on confined pressure lower peripheral surface seat (711) and the confined pressure is housed, confined pressure steel ball (713) is housed between the spheric seating (712) on described confined pressure lower peripheral surface seat (711) and the confined pressure, confined pressure reverser (714) passes described confined pressure entablature (703), described reverser (714) upper end of enclosing places on the spheric seating on the described confined pressure (712), confined pressure pitman shaft (715) is equipped with in the lower end, confined pressure centering dish (716) and confined pressure counterweight are housed on the described confined pressure pitman shaft (715) hang (717), described confined pressure counterweight is hung (717), 0.5Mpa confined pressure counterweight (718) is equipped with in bottom, and 0.05Mpa confined pressure counterweight (719) and 0.01Mpa confined pressure counterweight (720) are equipped with in the top.
5. large geotechnical three axis creep test according to claim 3 system is characterized in that, described axial compression holds up counterweight lift cylinders (304) and is connected with described axial compression hydraulic power source (6); Described axial compression forms cylinder (309) and is connected with described axial compression hydraulic power source (6), the servo load cylinder of axial compression (4) and axial load cylinder (101).
6. large geotechnical three axis creep test according to claim 4 system is characterized in that, described confined pressure holds up counterweight lift cylinders (704) and is connected with described confined pressure hydraulic power source (10); Described confined pressure forms cylinder (709) with described confined pressure hydraulic power source (10), the servo load cylinder of confined pressure (8) and encloses to load cylinder (102) and is connected.
7. large geotechnical three axis creep test according to claim 1 system is characterized in that, described axial load cylinder (101) and enclose to the diameter of load cylinder (102) and be respectively 300mm and 130mm.
8. according to claim 3 and 4 described large geotechnical three axis creep test systems, it is characterized in that described axial compression forms the diameter that cylinder (309) and confined pressure form cylinder (709) and is 35mm.
9. according to claim 3 and 4 described large geotechnical three axis creep test systems, it is characterized in that the quantity of described 0.05Mpa axial compression counterweight (319), 0.01Mpa axial compression counterweight (320), 0.05Mpa confined pressure counterweight (719) and 0.01Mpa confined pressure counterweight (720) is four; The quantity of described 0.6Mpa axial compression counterweight (318) is 17; The quantity of described 0.5Mpa confined pressure counterweight (718) is seven.
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| CN109540676A (en) * | 2019-01-05 | 2019-03-29 | 北京交通大学 | It is a kind of using servo loading, the soft rock single shaft creepmeter of mechanical pressure stabilizing |
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| CN111707539A (en) * | 2020-06-22 | 2020-09-25 | 中国人民解放军空军工程大学 | Test fixture for applying compressive stress to plate and using method thereof |
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| CN109540676B (en) * | 2019-01-05 | 2023-12-12 | 北京交通大学 | Soft rock uniaxial creep gauge adopting servo loading and mechanical voltage stabilization |
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| CN112730096A (en) * | 2021-01-22 | 2021-04-30 | 四川大学 | Rock rheology test system |
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