CN104155175B - Rock hollow cylinder torsional shear instrument - Google Patents
Rock hollow cylinder torsional shear instrument Download PDFInfo
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- CN104155175B CN104155175B CN201410343475.0A CN201410343475A CN104155175B CN 104155175 B CN104155175 B CN 104155175B CN 201410343475 A CN201410343475 A CN 201410343475A CN 104155175 B CN104155175 B CN 104155175B
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- 239000011435 rock Substances 0.000 title claims abstract description 80
- 238000004826 seaming Methods 0.000 claims abstract description 38
- 230000005540 biological transmission Effects 0.000 claims description 18
- 241000543741 Hexamermis Species 0.000 claims description 8
- 238000012360 testing method Methods 0.000 abstract description 22
- 238000002474 experimental method Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 38
- 239000002689 soil Substances 0.000 description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000000741 silica gel Substances 0.000 description 6
- 229910002027 silica gel Inorganic materials 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000010720 hydraulic oil Substances 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 241001584775 Tunga penetrans Species 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention relates to indoor rock mechanics experiment device, more specifically relate to the rock hollow cylinder torsional shear instrument that can realize complicated stress environment, belong to Geotechnical Engineering field.This torsion shear apparatus is by base, sleeve, push-down head, seaming chuck, piston, the seat of honour, top cover, connecting link, torsion device forms, rock hollow cylinder torsional shear instrument of the present invention solves the single difficult problem of rock indoor test unit stress path, independently or mixedly can load axial force to rock sample, interior confined pressure, outer confined pressure, moment of torsion, and overcome the defect mutually disturbed when four kinds of external force load, the stress path of principle stress size variation or principal axis of stress rotation can be simulated, rock hollow cylinder torsional shear instrument is rational in infrastructure, be easy to manufacture, simple to operate, measuring system is accurate, automaticity is high, the shop experiment of rock complex strain paths can be commonly used to.
Description
Technical field
The present invention relates to indoor rock mechanics experiment device, more specifically relate to the rock hollow cylinder torsional shear instrument that can realize complicated stress environment, belong to Geotechnical Engineering field.
Background technology
In engineering rock mass digging in-situ process, the stress state of rock mass inside is very complicated, shows as: in the constant situation in principal axis of stress direction, in principle stress size variation, the constant situation of principle stress size, principal axis of stress rotation, principal axis of stress direction rotate and principle stress size variation.Consider from macroscopic perspective, the change of above-mentioned stress state can cause rock mass to produce plastic yield, and elastic parameter and intensive parameter change; Consider from microcosmic angle, there are microfissure generation, through and expansion in rock mass inside.Therefore, carry out shop experiment and intensity, the deformation and failure form of rock under studying complex stress effect, this is for understanding and to administer engineering project disaster that rock excavation disturbance brings out significant.
At present, the rock indoor test unit can simulating stress path mainly contains uniaxial compression instrument, mechanical property instrument, direct shear apparatus, true triaxial compressometer etc.Uniaxial compression instrument can realize the fail in compression that rock loads at a principle stress action direction, can measure rock uniaxiality strength, can not realize other stress paths; Mechanical property instrument can realize rock the fail in compression loading bias voltage in confined pressure situation, can not realize the stress path of the principle stress action condition that three vary in size; Direct shear apparatus can realize the shear failure of rock at given shear surface, but the outbound course of shearing force and failure mechanics are not at grade, can not reflect the shear failure of rock truly; True triaxial compressometer can realize the fail in compression of rock under three principle stress effects varied in size, but often there is the problems such as pressurization rigid plate influences each other, end-face friction, and can not realize the stress path of principal axis of stress rotation.
According to the loading characteristic of hollow cylinder, the hollow cylinder torsional shear instrument being applicable to soil sample has been developed in Geotechnical Engineering field.But soil and rock are two kinds of different construction materials, and the existing hollow cylinder torsional shear instrument acting on soil sample is not suitable for rock material, and main manifestations is: 1) soil sample cohesion is lower, and the cutting that available conventional tool carries out arbitrary shape is reinvented.Therefore, manufacturing terminal mask has the soil sample of annular distribution groove more for convenience, is easy to the moment of torsion transmission realizing loading end face.But the cohesion of rock is higher, cannot makes and reinvent rock sample, the rock sample that processing end face has annular distribution groove is comparatively difficult.Therefore, need to adopt additive method to realize the applying of rock sample moment of torsion.2) relative rock, the intensity of soil is minimum, and the exportable external force of hollow cylinder torsional shear instrument being therefore applicable to soil sample is less, and conventional hydraulic pressure realizes the loading of confined pressure, and the confined pressure of rock sample loading normal use oil pressure realizes.On the other hand, needed for the rock failure mechanism of rock, stress level is higher, which dictates that the testing equipment being applicable to rock test must have higher stress ability to bear.3) relatively native, the distortion of rock is minimum, need adopt deformation measuring device and the method for the hollow cylinder torsional shear instrument being different from soil sample.4) the existing axis being applicable to the hollow cylinder torsional shear instrument of soil sample loads and there is interactional problem with moment of torsion loading structure, such as axially loads the friction effect caused.But because the outer force level putting on soil sample is relatively little, this influencing each other can be ignored for soil sample.When the destruction of rock must apply higher stress level, the loading of axial force can produce the friction force of larger obstruction twisting motion, this influence each other comparatively outstanding for rock.
In sum, existing rock indoor test unit cannot realize the stress path of the complexity such as principal axis of stress rotation, and test function is comparatively single; On the other hand, the hollow cylinder torsional shear instrument being applicable to soil sample cannot be applied to rock test, and due to rock and the difference of the character of soil, cannot carry out transforming to be applied to rock test.
Summary of the invention
The object of the invention is to be to provide that automaticity is high, load output system is reliable, measuring system accurately, there is the rock hollow cylinder torsional shear instrument of complex strain paths ability.
To achieve these goals, the present invention adopts following technical measures:
This torsion shear apparatus is by base, sleeve, push-down head, seaming chuck, piston, the seat of honour, top cover, connecting link, torsion device forms, base is boss-shaped, center, base upper surface has cylinder shape groove, chassis interior has Five-channel, 8th passage, tenth passage, the two-port of each passage lays respectively at outer wall and the boss top of base, base center has the 9th passage, the two-port of the 9th passage lays respectively at the outer wall of boss bottom portion of groove and base, push-down head is positioned in base, be bolted between push-down head and base, push-down head center has through Hexamermis spp, Hexamermis spp and the 9th passage are on same center line, push-down head inside has the 7th passage, the two-port of the 7th passage lays respectively at top and the outer wall of push-down head, hollow cylindrical sleeve is positioned on base, base is connected by pin bottom hollow cylindrical sleeve, the seat of honour is provided with above hollow cylindrical sleeve, the seat of honour is connected with base by equally distributed connecting link, top cover is provided with above the seat of honour, top cover is connected with the seat of honour by bolt, the seat of honour and top cover inside form cruciform oil pocket, piston is cruciform, piston is placed in cruciform oil pocket actively, the upper end of piston is stretched out from the top of top cover, the lower end of piston is stretched out from the below at the seat of honour, the lower end of piston is provided with seaming chuck, the upper end of seaming chuck is engaged mutually with the lower end of piston, seaming chuck inside has four-way, the two ends of four-way lay respectively at bottom and the outer wall of seaming chuck, four-way is connected with Five-channel by gas outlet, parallel first passage and third channel is had in the seat of honour, the Single port of first passage is positioned at the top of cruciform oil pocket, the Single port of third channel is positioned at the bottom of cruciform oil pocket, the another port of two passages is positioned at the outer wall at the seat of honour, also second channel is had in the seat of honour, the two-port of second channel lays respectively at outer wall and the bottom at the seat of honour, torsion device is by moment of torsion transmission rod, lifting jack, oscillating bearing, moment of torsion counter-force seat is formed, one end of moment of torsion transmission rod is fixed on top land, the other end of moment of torsion transmission rod is connected with the piston head of lifting jack by oscillating bearing, the other end and moment of torsion counter-force seat one end of lifting jack are hinged, the other end of moment of torsion counter-force seat is fixed on above the seat of honour by connecting link, first passage, third channel, 8th passage, 9th passage, lifting jack connects hydraulic servo pump respectively, base and sleeve, base and push-down head, the seat of honour and sleeve, the seat of honour and top cover, the seat of honour and piston, top cover and piston interface are respectively equipped with O-ring seal.
The upper and lower surface horizontal parallel of described base, push-down head, seaming chuck and piston.
Described moment of torsion transmission rod and lifting jack are parallel to each other, and perpendicular to piston.
The lower end of described seaming chuck is boss-shaped, and the upper end of push-down head is boss-shaped, and two boss are with footpath and on same center line.
Owing to have employed above technical scheme, this rock hollow cylinder torsional shear instrument has following advantage:
1 test unit can independently or mixedly load axial force, interior confined pressure, outer confined pressure and moment of torsion, analysis is carried out to tangent stress in the middle part of hollow cylinder known, the applying of axial force, interior confined pressure and outer confined pressure is equivalent to three principle stresses cell cube being applied to axis, hoop and radial direction, principal axis of stress non rotating can be simulated, only change the stress path of principle stress size, and the loading of moment of torsion can cause the principle stress of axis and hoop perpendicular to deflecting in the plane of radial direction, the stress path that the principal axis of stress rotates can be simulated.
2 seaming chucks, push-down head and rock sample are bonded to one by seccotine, and the surface of contact of seaming chuck, push-down head and rock sample has boss, add the contact area of rock sample and seaming chuck, push-down head, reduce the risk that when moment of torsion loads, surface of contact departs from.
3 seats of honour and top cover inside form cruciform oil pocket, piston is placed in cruciform oil pocket actively, cruciform oil pocket is divided into upper and lower two parts by piston, hydraulic servo pump by first passage to cruciform oil pocket top conveying liquid force feed and to piston load axial force, therefore, be different from the rigidity load mode that traditional employing lifting jack contacts with rigid rod, the loading of axial force adopts the flexible load mode of hydraulic oil and piston contact in this application, avoid lifting jack and contact the End frictional effect produced with rigid rod, effectively eliminate the mutual interference when axial force and moment of torsion load jointly.
The surface of contact of 4 seaming chucks and piston is by silica gel sealing, and the hydraulic oil in sleeve can not enter the surface of contact of piston and seaming chuck, and what can realize that axial force loads with outer confined pressure is separated, and makes the load mode of axial force more flexible.
5 hydraulic servo pumps, to piston applying axial force straight up, can be stablized jigger lifting piston after being advantageously used in test, avoid the disturbance of men hoisting piston to rock sample to cruciform oil pocket bottom conveying liquid force feed by third channel.
6 torsion devices are fixed on top cover and piston, when moment of torsion loads, carry out force analysis known, there is not rotation trend, therefore, do not need to configure stationary platform in addition, save fund and test space bottom this triaxial apparatus rock hollow cylinder torsional shear instrument entirety.
The rock sample of 7 rock hollow cylinder torsional shear instrument destroys and occurs in rock sample medium position, the analysis of stress and strain etc. is also for the cell cube in the middle part of rock sample, strain measurement adopts the mode of pasting foil gauge image data in the middle part of rock sample, accurately can obtain the real-time strain value of sample middle cell body, avoid the error measured the strain of rock sample entirety and bring, the applying of external force adopts high-precision hydraulic servo pump, can realize constant voltage and flow control, ensure that the reliability of test.
Rock hollow cylinder torsional shear instrument of the present invention solves the single difficult problem of rock indoor test unit stress path, independently or mixedly can load axial force, interior confined pressure, outer confined pressure, moment of torsion to rock sample, and overcome the defect mutually disturbed when four kinds of external force load, the stress path of principle stress size variation or principal axis of stress rotation can be simulated, rock hollow cylinder torsional shear instrument is rational in infrastructure, be easy to manufacture, simple to operate, measuring system is accurate, automaticity is high, can be commonly used to the shop experiment of rock complex strain paths.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is outside drawing of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described, sees accompanying drawing.
Rock hollow cylinder torsional shear instrument, this torsion shear apparatus is made up of base 12, sleeve 10, push-down head 20, seaming chuck 17, piston 1, the seat of honour 8, top cover 6, connecting link 11, torsion device.
Push-down head 20 top is boss-shaped, push-down head 20 center has through Hexamermis spp 21, Hexamermis spp 21 is for oil transportation, push-down head 20 inside has the 7th passage 22, the two-port of the 7th passage 22 lays respectively at push-down head 20 outer wall and boss top, 7th passage 22 is for transmission test data, and push-down head 20 top connects rock sample.In boss-shaped bottom seaming chuck 17, the boss of seaming chuck 17 and the boss of push-down head 20 are with footpath and on same center line, seaming chuck 17 top has square groove, seaming chuck 17 inside has four-way 18, the two ends of four-way 18 lay respectively at bottom and the outer wall of seaming chuck 17, four-way 18, for exhaust, connects rock sample bottom seaming chuck 17, and the space that seaming chuck 17, rock sample, push-down head 20 are formed is for applying interior confined pressure.
Base 12 is in boss-shaped, base 12 inside has Five-channel 23, 8th passage 15, tenth passage 13, the two-port of each passage lays respectively at outer wall and the boss top of base 12, Five-channel 23 to be connected with four-way 18 by gas outlet 19 and for being vented, 8th passage 15 is for oil transportation, tenth passage 13 and the 7th passage 22 are as the introduction passage of data line, base 12 center has the 9th passage 14, the two-port of the 9th passage 14 lays respectively at the outer wall of boss bottom portion of groove and base 12, 9th passage 14 is for oil transportation, center, base 12 upper surface has cylinder shape groove, push-down head 20 is positioned in base 12, be bolted between push-down head 20 and base 12, and ensure that the 9th passage 14 and Hexamermis spp 21 are on same center line.Hollow cylindrical sleeve 10 is positioned on base 12, and connect base 12 by pin bottom hollow cylindrical sleeve 10, hollow cylindrical sleeve 10 inner space is for applying outer confined pressure.
The seat of honour 8 is positioned on hollow cylindrical sleeve 10, the seat of honour 8 is connected with base 12 by equally distributed connecting link 11, top cover 6 is provided with above the seat of honour 8, top cover 6 is connected with the seat of honour 8 by bolt, the seat of honour 8 and top cover 6 inside form cruciform oil pocket, piston 1 is in cruciform, piston 1 is placed in cruciform oil pocket actively, the upper end of piston 1 is stretched out from the top of top cover 6, the lower end of piston 1 is stretched out from the below at the seat of honour 8, the lower surface of piston 1 and base 12, push-down head 20, the upper and lower surface horizontal parallel of seaming chuck 17, the lower end of piston 1 has square boss, silica gel is smeared outside the square boss of piston 1 lower end, the square boss of piston 1 lower end and the square groove of seaming chuck 17 upper end sting merga pass silica gel sealing mutually, parallel first passage 7 and third channel 9 is had in the seat of honour 8, the Single port of first passage 7 is positioned at the top of cruciform oil pocket, the Single port of third channel 9 is positioned at the bottom of cruciform oil pocket, the another port of two passages is positioned at the outer wall at the seat of honour 8, first passage 7 and third channel 9 are for oil transportation, second channel 16 is also had in the seat of honour 8, the two-port of second channel 16 lays respectively at outer wall and the bottom at the seat of honour 8, second channel 16 is for exhaust.
Torsion device is made up of moment of torsion transmission rod 2, lifting jack 3, oscillating bearing 4, moment of torsion counter-force seat 5, one end of moment of torsion transmission rod 2 is fixed on piston 1 top, the other end of moment of torsion transmission rod 2 is connected with the piston head of lifting jack 3 by oscillating bearing 4, the other end and moment of torsion counter-force seat 5 one end of lifting jack 3 are hinged, the other end of moment of torsion counter-force seat 5 is fixed on above the seat of honour 8 by two connecting links 11, moment of torsion transmission rod 2, lifting jack 3 horizontal parallel, and vertical with piston 1.
First passage 7, third channel 9, 8th passage 15, 9th passage 14, lifting jack 3 connects hydraulic servo pump respectively, hydraulic servo pump can be selected high-precision hydraulic servo pump and ensure the Stability and veracity of loading system, axial force can be loaded to the upper oil chamber oil transportation of cruciform oil pocket by first passage 7, by third channel 9 can to the oil pocket oil transportation of cruciform oil pocket bottom so that off-test time piston 1 promote, also outer confined pressure can be loaded to the inner oil transportation of sleeve 10 by the 8th passage 15, confined pressure in also can being loaded to the inner oil transportation of rock sample by the 9th passage 14, by can moment of torsion be loaded to lifting jack 3 oil transportation, be vented when second channel 16 is for loading outer confined pressure, be vented when four-way 18 and Five-channel 23 are for loading interior confined pressure.The Single port that tenth passage 13 is positioned at base 12 outer wall is connected with Data Control and acquisition system, can real-time Transmission test figure.
Base 12 is respectively equipped with O-ring seal with piston 1, top cover 6 with piston 1 surface of contact with top cover 6, the seat of honour 8 with sleeve 10, the seat of honour 8, for ensureing the inner sealing of oil pocket of this torsion shear apparatus and the reliability of loading with sleeve 10, base 12 with push-down head 20, the seat of honour 8.
Principle of work of the present invention is:
Introduce the two-port that data line connects the 7th passage 22 in (1) the 7th passage 22, introduce the two-port that data line connects the tenth passage 13 in the tenth passage 13, the Single port that the tenth passage 13 is positioned at base 12 outer wall is connected with Data Control and acquisition system.Meanwhile, the two-port of the 7th passage 22 and the tenth passage 13 is sealed respectively.
(2) hollow cylinder rock sample is prepared, and paste foil gauge at the medium position of rock sample inner and outer wall, the data line ports that foil gauge data line and the 7th passage 22 of rock sample inwall are positioned at push-down head 20 boss top is connected, smear seccotine outside push-down head 20 outer wall of boss and push-down head 20 top boss, rock sample is bonded in above push-down head 20 by seccotine.
(3) seccotine is smeared outside seaming chuck 17 outer wall of boss and seaming chuck 17 boss, seaming chuck 17 is bonded in above rock sample by seccotine, and ensure that push-down head 20, rock sample, seaming chuck 17 are on same center line, rock sample outer wall parcel rubber sleeve, and by silica gel sealing rubber sleeve lower edges, rock sample is connected as a whole with seaming chuck 17, push-down head 20.
(4) push-down head 20 is positioned in base 12, be bolted between push-down head 20 and base 12, and ensure that Hexamermis spp 21 and the 9th passage 14 are on same center line, four-way 18 is connected with Five-channel 23 by gas outlet 19, and the 7th passage 22 is connected with the tenth passage 13 by data line 24.
(5) hollow cylindrical sleeve 10 is positioned on base 12, base 12 is connected by pin bottom hollow cylindrical sleeve 10, the seat of honour 8 is positioned on hollow cylindrical sleeve 10, silica gel is smeared outside the square boss of piston 1 lower end, place piston 1 in cruciform oil pocket, the lower end of piston 1 is stretched out from the below at the seat of honour 8, and ensure lower surface and the base 12 of piston 1, push-down head 20, the upper and lower surface horizontal parallel of seaming chuck 17, the square boss of piston 1 lower end and the square groove of seaming chuck 17 upper end sting merga pass silica gel sealing mutually, top cover 6 is inserted in piston 1 and is positioned on the seat of honour 8, top cover 6 is connected with the seat of honour 8 by bolt.
(6) one end of moment of torsion transmission rod 2 is fixed on piston 1 top, the other end of moment of torsion transmission rod 2 is connected with the piston head of lifting jack 3 by oscillating bearing 4, the other end and moment of torsion counter-force seat 5 one end of lifting jack 3 are hinged, ensure that moment of torsion transmission rod 2 is vertical with piston 1 with lifting jack 3 horizontal parallel, two connecting links 11 are each passed through two threaded holes of moment of torsion counter-force seat 5 other end, and moment of torsion counter-force seat 5, the seat of honour 8, base 12 are fixed, pass the residual thread hole of the seat of honour 8 and base 12 by connecting link 11 and the seat of honour 8 and base 12 are fixed.
(7) first passage 7, third channel 9, the 8th passage 15, the 9th passage 14, lifting jack 3 connect hydraulic servo pump respectively, close second channel 16, Five-channel 23, the tenth passage 13 before on-test.
(8) when loading outer confined pressure, second channel 16 is opened, by hydraulic servo pump to the 8th passage 15 oil transportation, second channel 16 is closed when second channel 16 has hydraulic oil to flow out, continue to load periphery and be depressed into setting value, off-test also, when need unload outer confined pressure, opens second channel 16.
(9) when load in confined pressure time, open Five-channel 23, by hydraulic servo pump to the 9th passage 14 oil transportation, Five-channel 23 is closed when Five-channel 23 has hydraulic oil to flow out, continue to load interior confined pressure to setting value, off-test also, when need unload interior confined pressure, opens Five-channel 23.
(9) when loading axial force, by hydraulic servo pump to first passage 7 oil transportation to setting value, the oil pressure of hydraulic servo pump during off-test, is unloaded.
(10) when loading moment of torsion, by hydraulic servo pump to lifting jack 3 oil transportation to setting value, the oil pressure of lifting jack 3 during off-test, is unloaded.
(11) when off-test also need take out rock sample, take off connecting link 11, torsion device, top cover 6 successively, by hydraulic servo pump to third channel 9 oil transportation and jigger lifting piston 1, oil transportation is stopped when piston 1 and rock sample undisturbed, take off piston 1 and unload the oil pressure of hydraulic servo pump, take off the seat of honour 8 successively, bolt that sleeve 10, push-down head 20 are connected with base 12, removal seaming chuck 17 and push-down head 20 also obtain rock sample.
Claims (4)
1. rock hollow cylinder torsional shear instrument, it is characterized in that: this torsion shear apparatus is by base (12), sleeve (10), push-down head (20), seaming chuck (17), piston (1), the seat of honour (8), top cover (6), connecting link (11), torsion device forms, base (12) is in boss-shaped, base (12) center, upper surface has cylinder shape groove, base (12) inside has Five-channel (23), 8th passage (15), tenth passage (13), the two-port of each passage lays respectively at outer wall and the boss top of base (12), base (12) center has the 9th passage (14), the two-port of the 9th passage (14) lays respectively at the outer wall of boss bottom portion of groove and base (12), push-down head (20) is positioned in base (12), be bolted between push-down head (20) and base (12), push-down head (20) center has through Hexamermis spp (21), Hexamermis spp (21) and the 9th passage (14) are on same center line, push-down head (20) inside has the 7th passage (22), the two-port of the 7th passage (22) lays respectively at top and the outer wall of push-down head (20), hollow cylindrical sleeve (10) is positioned on base (12), hollow cylindrical sleeve (10) bottom connects base (12) by pin, hollow cylindrical sleeve (10) top is provided with the seat of honour (8), the seat of honour (8) is connected with base (12) by equally distributed connecting link (11), top, the seat of honour (8) is provided with top cover (6), top cover (6) is connected with the seat of honour (8) by bolt, the seat of honour (8) and top cover (6) inside form cruciform oil pocket, piston (1) is in cruciform, piston (1) is placed in cruciform oil pocket actively, the upper end of piston (1) is stretched out from the top of top cover (6), the lower end of piston (1) is stretched out from the below of the seat of honour (8), the lower end of piston (1) is provided with seaming chuck (17), the upper end of seaming chuck (17) is engaged mutually with the lower end of piston (1), seaming chuck (17) inside has four-way (18), the two ends of four-way (18) lay respectively at bottom and the outer wall of seaming chuck (17), four-way (18) is connected with Five-channel (23) by gas outlet (19), parallel first passage (7) and third channel (9) is had in the seat of honour (8), the Single port of first passage (7) is positioned at the top of cruciform oil pocket, the Single port of third channel (9) is positioned at the bottom of cruciform oil pocket, the another port of two passages is positioned at the outer wall of the seat of honour (8), second channel (16) is also had in the seat of honour (8), the two-port of second channel (16) lays respectively at outer wall and the bottom at the seat of honour (8), torsion device is by moment of torsion transmission rod (2), lifting jack (3), oscillating bearing (4), moment of torsion counter-force seat (5) is formed, one end of moment of torsion transmission rod (2) is fixed on piston (1) top, the other end of moment of torsion transmission rod (2) is connected with the piston head of lifting jack (3) by oscillating bearing (4), the other end and moment of torsion counter-force seat (5) one end of lifting jack (3) are hinged, the other end of moment of torsion counter-force seat (5) is fixed on top, the seat of honour (8) by connecting link (11), first passage (7), third channel (9), 8th passage (15), 9th passage (14), lifting jack (3) connects hydraulic servo pump respectively, base (12) and sleeve (10), base (12) and push-down head (20), the seat of honour (8) and sleeve (10), the seat of honour (8) and top cover (6), the seat of honour (8) and piston (1), top cover (6) and piston (1) surface of contact are respectively equipped with O-ring seal.
2. rock hollow cylinder torsional shear instrument according to claim 1, is characterized in that: the upper and lower surface horizontal parallel of described base (12), push-down head (20), seaming chuck (17) and piston (1).
3. rock hollow cylinder torsional shear instrument according to claim 1, is characterized in that: described moment of torsion transmission rod (2) and lifting jack (3) are parallel to each other, and perpendicular to piston (1).
4. rock hollow cylinder torsional shear instrument according to claim 1, is characterized in that: the lower end of described seaming chuck (17) is boss-shaped, and the upper end of push-down head (20) is boss-shaped, and two boss are with footpath and on same center line.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410343475.0A CN104155175B (en) | 2014-07-18 | 2014-07-18 | Rock hollow cylinder torsional shear instrument |
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| CN201410343475.0A CN104155175B (en) | 2014-07-18 | 2014-07-18 | Rock hollow cylinder torsional shear instrument |
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| CN104155175A CN104155175A (en) | 2014-11-19 |
| CN104155175B true CN104155175B (en) | 2016-04-20 |
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| CN103149101B (en) * | 2013-02-28 | 2014-08-06 | 西安理工大学 | Multifunctional triaxial creep testing machine with soil body pulling, pressing, twisting and shearing functions |
| CN203965229U (en) * | 2014-07-18 | 2014-11-26 | 中国科学院武汉岩土力学研究所 | Rock hollow cylinder torsional shear instrument |
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