CN106769780B - The full shear-seepage coupling test of rock joint shears seepage flow box under Thief zone pressure - Google Patents
The full shear-seepage coupling test of rock joint shears seepage flow box under Thief zone pressure Download PDFInfo
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- CN106769780B CN106769780B CN201710059975.5A CN201710059975A CN106769780B CN 106769780 B CN106769780 B CN 106769780B CN 201710059975 A CN201710059975 A CN 201710059975A CN 106769780 B CN106769780 B CN 106769780B
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
Abstract
The present invention relates to a kind of full shear-seepage coupling tests of rock joint under Thief zone pressure to shear seepage flow box, including the upper cartridge body and lower box body for placing rock sample, the side plate of rock sample width direction two sides is set, the cushion cap of lower box body bottom is set and is pressed in the normal direction load cushion block of rock sample, upper cartridge body, lower box body and side plate are collectively formed one for placing the cavity of rock sample, lower box body and side plate are bolted, the middle part of side plate is equipped with rectilinear orbit, upper cartridge body is placed on the rectilinear orbit, enter aquaporin equipped with what is be connected to cavity in upper cartridge body, the exhalant canal being connected to cavity is equipped in lower box body.Compared with prior art, the present invention and the true seepage flow situation of rock mass in engineering are closer, and sealing problem of the rock joint sample in shear history can be realized very well, it can bear Thief zone water pressure, test accuracy is higher, and is capable of the full shear-seepage coupling test of rock joint of more preferable simulation nature.
Description
Technical field
The present invention relates to shear box and test methods, and in particular to rock joint shearing-infiltration entirely under a kind of Thief zone pressure
It flows coupling test and shears seepage flow box
Background technique
Deep underground engineering is mainly concerned with nuclear waste disposal, underground gas reservoirs, deep mining, CO2It seals up for safekeeping, underground heat
The every field of national economy is covered in exploitation and air-pressing accumulation etc..It is past in joint fissure in the deep underground engineering rich in water
Toward there are problems that Thief zone is poor, high flow rate seepage flow and rock stability caused by high hydraulic gradient meeting.One side deep rock
Body engineering stability is heavily dependent on joint seepage characteristic, in turn in deep rock mass stress variation, especially cut
The effect of shearing stress, cause joint occur to open or closure deformation and cause the seepage characteristic at joint.Deep rock under hyperosmosis
Body segment reason in seepagestress coupling analysis characteristic have become in order in large-scale deep underground engineering stability analysis there is an urgent need to solve
Key problem in science certainly.
Carrying out indoor shear-seepage coupling test to rock joint at present is the research full shear-seepage coupled characteristic in joint
The direct effective means of research.And it develops the most crucial technological difficulties of the full shearing-seepage coupling test system of rock joint and exists
In the design and fabrication of shearing seepage flow box.Early stage the Seepage-stress coupling characteristic research to joint, due to the limitation of experimental condition,
The radiant flux and normal direction-seepage coupling test for being concentrated mainly on joint are carried out in especially seepage flow sealing technique, test, carry out joint
Shear-seepage coupling test is simultaneously few.The domestic only several tests about rock joint shear-seepage coupled characteristic are set at present
Standby, due to sealing technique and shearing seepage flow box design defect, the shearing seepage flow of rock joint exists during actual test
Poor sealing effect and the case where stringency of test not high (friction of shear box system is excessive), especially in Thief zone pressure
Under effect, good sealing effect cannot achieve.Therefore those skilled in the art are dedicated to developing a kind of hyperosmosis power effect
The better full shear-seepage coupling test shear box of lower test accuracy more high sealing effect.
Summary of the invention
It is high, real that it is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of receiving hydraulic pressure
Test the full shear-seepage coupling test shearing seepage flow box of rock joint under the high Thief zone pressure of accuracy.
The purpose of the present invention can be achieved through the following technical solutions: rock joint is cut entirely under a kind of Thief zone pressure
Cut-seepage coupling test shearing seepage flow box, the shearing seepage flow box include upper cartridge body for placing rock sample and lower box body,
The side plate of rock sample width direction two sides is set, the cushion cap of lower box body bottom is set and is pressed in above rock sample
Normal direction loads cushion block, and the upper cartridge body, lower box body and side plate are collectively formed one for placing the cavity of rock sample, under described
Box body and side plate are bolted, and the middle part of side plate is equipped with rectilinear orbit, and the upper cartridge body is placed on the rectilinear orbit, institute
The aquaporin that enters for being equipped in upper cartridge body and being connected to cavity is stated, is equipped with the exhalant canal being connected to cavity in the lower box body.
The upper cartridge body includes upper plate, the upper shear box that upper plate both ends are arranged in and upper fixed shear block and sets
The upper mobile cutout between upper shear box and rock sample is set, the side of the rock sample and upper fixed shear block are tight
Patch, the other side of rock sample connect by upper mobile cutout with the upper shear box, the upper plate, upper shear box and
Upper fixed shear block is integrally formed, and the through-hole of rectangle is equipped in the middle part of the upper plate, and the normal direction load cushion block passes through the square
The through-hole of shape is pressed in the top of rock sample, and upper plate is placed on rectilinear orbit, in addition, linear guide is equipped with small-sized rolling
Wheel can be ignored so that the friction between upper plate and linear guide is rolling friction, shear in upper cartridge body and lower box body
When mobile, experimental result will not be influenced because of the frictional force between upper plate and linear guide.
The upper mobile cutout includes wedge shape shearing block and No. two upper wedge shape shearing blocks in No.1, wedge shape in the No.1
The top surface of cutout is fixed by fastening soket head cap screw with upper plate, the one side and rock sample of wedge shape shearing block in No.1
It is close to, the other side is wedge shaped, and the side of described No. two upper wedge shape shearing blocks is adjacent to upper shear box, and the other side is and wedge in No.1
The top of the wedge shape that shape cutout matches, No. two upper wedge shape shearing blocks is moved by the way that upper positioning soket head cap screw is vertical with upper plate
Dynamic connection.Wedge shape shearing block on upper plate and No.1 is fixed using screw, wedge shape shearing block in No.1 is avoided and is tried in rock
In sample shearing flow event because cut it is swollen due to be subjected to displacement upwards with sample.
The lower box body includes lower plate, the lower shear box that bottom board ends are arranged in and lower fixed shear block and sets
The lower mobile cutout between lower shear box and rock sample is set, the side of the rock sample and lower fixed shear block are tight
Patch, the other side of rock sample is connect by lower mobile cutout with the lower shear box；The top of the lower fixed shear block
It is connected with the bottom of mobile cutout upper in the upper cartridge body, the lower plate, lower shear box and lower fixed shear block
It is integrally formed.
The lower mobile cutout includes wedge-shaped cutout under wedge-shaped cutout and No. two under No.1, wedge shape under the No.1
The bottom surface of cutout and lower plate connect, and the top surface of wedge-shaped cutout contacts company with the bottom surface of upper fixed shear block under No.1
It connects, the one side of wedge-shaped cutout is close to rock sample under No.1, and the other side is wedge shaped, wedge-shaped cutout under described No. two
Side is adjacent to lower shear box, and the other side is the wedge shape to match with cutout wedge-shaped under No.1, wedge-shaped cutout under No. two
Bottom is vertically moved with lower plate by lower positioning soket head cap screw and is connect.
In No.1 under the bottom end of wedge shape shearing block and No.1 the top of wedge-shaped cutout along rock sample shear direction
The flat notch for offering certain length and depth, in so avoiding rock joint samples in shear history and cutout
It is in contact friction, while also providing the space of buffering flowing to enter water and exhalant canal, is avoided in Thief zone pressure section
Jet effect occurs for water in reason, the seepage field of stable and uniform is formed, more realistically to react true seepage flow situation in joint.
Upper mobile cutout in upper cartridge body and the lower mobile cutout in lower box body are all to have two pieces of wedge shape shearing blocks to spell
Connect, not only can accurately before Control experiment rock sample in the position of shear direction, moreover it is possible to make in sample and cutout
Lateral water shutoff item be in close contact, very well realize rock joint sample both ends in shear history sealing problem.
Wedge shape shearing block, lower fixed shear block and rock sample three intersection are equipped with into water channel port in the No.1,
It is described enter aquaporin be connected to water channel port is entered through lower fixed shear block；
Wedge shape shearing block, upper fixed shear block and rock sample three intersection are equipped with exhalant canal to the No.1 up and down
Mouthful, the exhalant canal is connected to through upper fixed shear block with exhalant canal mouth；
In the No.1 between wedge shape shearing block and rock sample, in No.1 wedge shape shearing block and lower fixed shear block it
Between, between lower fixed shear block and rock sample, wedge-shaped cutout between wedge-shaped cutout and rock sample, under No.1 under No.1
Water shutoff item is equipped between upper fixed shear block, between upper fixed shear block and rock sample.
The water shutoff item includes the trapezoidal item that one side of rectangular strip is arranged in rectangular strip and integrated molding.
The upper end of the upper plate set there are two for compressing in No.1 between wedge shape shearing block and lower fixed shear block and
Under No.1 between wedge-shaped cutout and upper fixed shear block water shutoff item bearing part, the bearing part includes pressure roller shaft and setting
Two deep groove ball bearings in pressure roller shaft, two deep groove ball bearings are respectively set on upper plate and wedge shape in face No.1
Water shutoff item between wedge-shaped cutout and upper fixed shear block between cutout and lower fixed shear block and under No.1.
Through-hole is opened up in the middle part of the side plate and rock sample contact surface, side plate cushion block is fixed on the outside of through-hole, it should
Seal capsule is placed in through-hole, one end of the seal capsule is fixedly connected by screw with side plate cushion block, seal capsule it is another
One end is close to rock sample, and silica gel plate is placed between seal capsule and rock sample；
The inner wall of the side plate upper end opens up U-type groove, and the pressure roller shaft is erected in two opposite U-type grooves of side plate, and
It is compressed by nut and fixes both side plate；Pressure roller block is arranged in the top of pressure roller shaft in U-type groove, and the pressure roller block passes through six
The upper edge fastening of angle screw and side plate.By hex screw by pressure roller block and side plate along fixation, and as hex screw is twisted
The depth that enters increases, pressure roller block receive downwards in it is bigger, so that the pressure for passing to pressure roller shaft is also bigger, so applying
Also bigger in downwards to deep groove ball bearing, the power that deep groove ball bearing is pressed down against upper plate is also bigger, and fixation is caused to be cut
Pressure between stripping and slicing and lower mobile cutout is also bigger, thus by the envelope between upper fixed shear block and lower mobile cutout
Water bar is squeezed and deformed, and reaches good sealing effect.
One end connection for entering aquaporin can provide the plunger type metering pump for stablizing Thief zone hydraulic pressure, in one end of exhalant canal
It is connected with miniature seepage flow servo-control system.It is connected separately on water channel port and exhalant canal mouth in entering for rock sample both ends
Miniature needle-valve is installed for monitoring the hydraulic pressure sensor of hydraulic pressure, and among miniature seepage flow servo-control system and exhalant canal,
Simultaneously flowermeter is installed on exhalant canal, both can effectively solve the pressure control in rock joint sample shear history
Precision problem, and can guarantee stable source pressure during rock joint shear, and realize and control under Thief zone pressure
Rock joint sample is discharged and enters the constant differential water pressures of water, can rock sample shears seepage flow under simulation Thief zone hydraulic pressure very well
Situation, and can be closer with the true seepage flow situation of rock mass in engineering.
The through-hole that the normal direction load cushion block passes through upper plate is pressed in the top of rock sample, and normal direction loads cushion block and leads to
The ball being vertically arranged is equipped between the inner wall in hole.Normal direction load cushion block is rubbed with upper shear box by sliding friction Variable roll,
Both guaranteed that joint plane moved in vertical direction on rock sample, moreover it is possible to effectively reduce the friction of system.
Compared with prior art, the beneficial effects of the present invention are embodied in following several respects:
(1) it realizes and controls the water outlet of rock joint sample under Thief zone pressure and enter the constant differential water pressures of water, it can be fine
Rock sample shears seepage flow situation under simulation Thief zone hydraulic pressure, and can be closer with the true seepage flow situation of rock mass in engineering；
(2) by two wedge shape shearing blocks of setting, effectively water shutoff item can be pressed on logical into water channel port and water outlet
The sealing problem at rock joint sample both ends in shear history is realized in the periphery at road junction very well；
(3) wedge shape shearing block on upper shear box and No.1 is fixed using screw, avoids wedge shape shearing block in No.1 and exists
In rock sample shearing flow event because cut it is swollen due to be subjected to displacement upwards with sample；
(4) the upper mobile cutout in upper cartridge body and the lower mobile cutout in lower box body are all to have two pieces of wedge shape shearing blocks
Be spliced, not only can accurately before Control experiment rock sample in the position of shear direction, moreover it is possible to make sample and cutout
In lateral water shutoff item be in close contact, very well realize rock joint sample both ends in shear history sealing problem；
(5) setting ball is arranged on the stress surface of normal direction load cushion block and upper shear box, and normal direction is loaded cushion block and above cut
It cuts box to be rubbed by sliding friction Variable roll, has both guaranteed that joint plane moves in vertical direction on rock sample, moreover it is possible to effectively reduce
The friction of system.
Detailed description of the invention
Fig. 1 faces the schematic diagram of the section structure for of the invention；
Fig. 2 is side elevational cross-section structural schematic diagram of the invention；
Fig. 3 is the three-view diagram of water shutoff item.
Wherein, 1 is lower shear box, and 2 be side plate, and 3 be upper shear box, and 4 be rock sample, and 5a is upper fixed shear block, 5b
For lower fixed shear block, 6a is wedge shape shearing block in No.1, and 6b is No. two upper wedge shape shearing blocks, and 7a is wedge shape shearing under No.1
Block, 7b are wedge-shaped cutout under No. two, and 8a is upper positioning soket head cap screw, and 8b is lower positioning soket head cap screw, and 9 be in fastening six
Angle screw, 10 be water shutoff item, and 11 be seal capsule, and 12 be into aquaporin, and 13 be into water channel port, and 14 be exhalant canal, and 15 are
Exhalant canal mouth, 16 be screw, and 17 be side plate cushion block, and 18 be silica gel plate, and 19 be bolt, and 20 be outer retaining ring, and 21 be inner shield ring, 22
It is pressure roller shaft for deep groove ball bearing, 23,24 be hex screw, and 25 be pressure roller block, and 26 be linear guide, and 27 be normal direction loading pad
Block, 28 be ball, and 29 be cushion cap, and 30 be upper plate, and 31 be lower plate.
Specific embodiment
It elaborates below to the embodiment of the present invention, the present embodiment carries out under the premise of the technical scheme of the present invention
Implement, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to following implementation
Example.
Embodiment 1
The full shear-seepage coupling test of rock joint shears seepage flow box under a kind of Thief zone pressure, as depicted in figs. 1 and 2,
Including lower shear box 1, two blocks of side plates by soket head cap screw fixation vertical with lower shear box of lower 1 two sides of shear box are set
2 and upper shear box 3.1, two block of side plate 2 of lower shear box and upper shear box 3 form the cavity for being used to place rock sample 4,
Cavity both ends are equipped with for fixing upper fixed shear block 5a, the lower fixed shear block 5b of rock sample 4 and horizontal position can occur
Wedge shape shearing block 6a in the No.1 of shifting, wedge shape cutout 7a and No. two lower wedge shape shearings under No. two upper wedge shape shearing block 6b, No.1s
Block 7b；Wherein descend fixed shear block 5a, lower shear box 1 and lower plate 31 to be processed into an entirety, upper fixed shear block 5b, on cut
It cuts box 3 and upper plate 30 is processed into an entirety.No. two upper wedge shape shearing block 6b, under No. two wedge shape cutout 7b pass through respectively it is upper
Positioning soket head cap screw 8a, lower positioning soket head cap screw 8b and upper plate 30, lower plate 31 are fastened, and can be cut in this way by two
Wedging block is in close contact, and realizes the fixation of the horizontal direction of rock joint sample, moreover it is possible to will be between cutout and rock sample 4
Lateral water shutoff item 10 squeezes, to ensure that rock sample both ends vertically seal.It is cut in upper plate 30 and wedge shape in No.1
Stripping and slicing 6a corresponding position offers the counterbore of certain length, after the position of rock joint sample is fixed, wedge shape shearing in No.1
Block 6a is fastened by the fastening soket head cap screw 9 in counterbore with upper shear box, can be to avoid wedge shape shearing block 6a in No.1
With rock sample 4 in shear history because cutting swollen generation Normal Displacement, can also avoid in No.1 wedge shape shearing block 6a under
Lateral water shutoff item 10 deformation between fixed shear block 5a occurs rebound and influences sealing.
The seepage flow sealing system that seepage flow box is sheared in the present embodiment is made of water shutoff item 10 and lateral seal capsule 11, water shutoff
Item is mainly included in No.1 between wedge shape shearing block 6a and rock sample 4, wedge shape shearing block 6a and lower fixed shear in No.1
Between block 5a, between lower fixed shear block 5a and rock sample 4, under No.1 between wedge shape cutout 7a and rock sample 4, No.1
Between lower wedge shape cutout 7a and upper fixed shear block 5b, between upper fixed shear block 5b and rock sample 4；Preferably to realize
Sealing, lateral water shutoff item uses the sealing means similar to " O-ring " (linear sealing), i.e., using trapezoidal and rectangular cross section shape
Formula is as shown in Figure 3.Upper and lower cutout is applied in combination with lateral water shutoff item, ensures that rock joint sample was being sheared in this way
Both ends sealing in journey.The top nose of wedge-shaped cutout 7a divides under the bottom front and No.1 of wedge shape shearing block 6a in No.1
Do not offer certain length and depth laterally flat notch, in this way can to avoid joint plane above and below rock in shear history with cut
Stripping and slicing is in contact destruction, it can also be ensured that for rock joint in shear history, water flow is flat rock joint rear and front end
Uniform stationary flow is formed at notch, after again by joint carry out seepage flow, so that the seepage flow at joint is more met nature.Lower fixation
One is offered in cutout 5a and enters aquaporin 12, is provided in the front end of lower fixed shear block 5a and several arranged in parallel is entered water
Passway 13 forms front water passage, opens up exhalant canal 14 in 5b in upper fixed shear block, exhalant canal mouth 15 is by setting
The bottom front for setting fixed shear block 5b is made of several infiltration apertures arranged in parallel.Divide simultaneously in discrepancy aquaporin 14
Not An Zhuan hydraulic pressure sensor measurement joint plane inlet and exit hydraulic pressure, so as to accurately control shearing flow event in save
The pressure difference of reason face rear and front end.It is connected with flowmeter in the water outlet of rock joint simultaneously, water is crossed by joint to measure
Flow.
Seal capsule 11 is made of the moderate polyurethane material of elasticity and hardness, and inside is filled with hydraulic oil, lateral water shutoff capsule
It is good with plasticity, it rubs the features such as small.Side plate cushion block 17 is closely connect with seal capsule 11 using inner bolt 16, is guaranteed close
The leakproofness of sealing capsule 11.Seal capsule 11 is set to bear certain pressure by servo-loading unit, side under the action of oil pressure
It is closely affixed to water shutoff capsule 11 by soft silica gel plate 18 and 4 side of rock sample and lateral water shutoff item 10, to reach
The sealing of sample side.18 pieces of silica gel plate be used as consumables, cost is relatively low, can avoid rock joint in shear history,
Especially supreme people's court under stress condition, lateral water shutoff capsule 11 and sample side because caused by friction seal capsule 11 destroy,
It can be very good to fit closely with joint samples side also as the material is soft, can be smeared on silica gel plate during test
Lubricating oil, to reduce the friction between silica gel plate and sample side.
To contact with ground sample 4 by the pretightning force of upper positioning soket head cap screw 8a, lower positioning soket head cap screw 8b
Lateral water shutoff item 10 occur length direction elongation, to ensure that the sealing of upper and lower shear box both ends vertical direction；It utilizes
Bearing assembly fastens upper and lower box body, and wherein bearing assembly includes bolt 19, outer retaining ring 20, inner shield ring 21, deep-groove ball axis
Hold 22, pressure roller shaft 23.And bearing is acted directly on upper plate 30 by soket head cap screw 24 and pressure roller block 25 and applies normal direction
Active force.At this moment stretching for length direction also has occurred in the lateral water shutoff item 10 being arranged between fixed shear block and mobile cutout
It is long, sealing of the Lai Shixian shear box both ends in horizontal shear direction.Seal capsule component on joint periphery and lateral envelope in this way
Water bar will form the water-stop boundary of joint samples surrounding.The middle part of side plate 2 is equipped with rectilinear orbit 26, the upper plate 30 of upper cartridge body
It is placed on the rectilinear orbit 26, and linear guide 26 is equipped with small-sized idler wheel, shearing of such upper plate 30 in rock sample
It is free to slide on direction, to reduce the friction caused by the process of rock sample joint between upper and lower shear box.
It is connected at the top of rock joint sample with normal direction load cushion block 27, and in normal direction load cushion block 27 and upper shear box 3
Acting surface on be arranged ball 28, not only can guarantee that joint plane moves in vertical direction on rock sample, moreover it is possible to have
Effect reduces the friction between normal direction load cushion block 27 and upper shear box 3.Whole shear box is placed on cushion cap 29, and platform is embedded in big
In the linear guide of type, approximate undamped motion ensures the concentricity of sample and pressure head to guide rail in the horizontal direction, has friction
The characteristics of.During shearing, the notch at upper and lower shear box both ends passes through connecting pin and the clip frame for shearing osmotic system
It is connected.
Using the full shear-seepage coupling test shear box of rock joint, specific step is as follows:
(1) rock joint specimen size are as follows: water seepage direction 200mm, seepage flow width 100mm, high 100mm.Sample uses
Natural joint samples, the artificial joint samples that cement mortar replicates natural joint samples or splitting obtains.
Natural joint samples irregular for outer shape can carry out external package with cement mortar, be made 200 × 100
The test specimen of × 100mm；The joint plane of natural joint plane or indoors artificial splitting is selected in field condition, then by manually cutting
At the joint plane of 200 × 100mm, using this as template joint, using the cement of water, cement, the sand composition of certain mass proportion
Mortar replicates template joint to defined specimen size；The production of artificial joint samples, generally in the collection in worksite well appeared
Block-like complete rock sample, polishes to obtain by manually cutting
The sample of 200 × 100 × 100mm, then artificial joint is obtained by diametral compression test.
(2) lower shear box is closely coupled by the soket head cap screw of bottom with both side plate, reasonably to assemble guarantee two
The verticality and the depth of parallelism of side plate, after rock joint sample is placed on lower shearing box plate.Due in shear history, two
Side plate, lower shear box and lower half block joint samples are relatively stationary, by lower half block joint samples and side plate before test, and
Contact position smears liquid silica gel between lower half block joint samples and the cutout at both ends, is conducive to shear the whole of seepage flow box system
Body sealing；It by lateral water shutoff item and is placed under upper fixed shear block 5b and No.1 in wedge-shaped cutout 7a, by lower positioning
Hex screw tightens lower shear box 1 and cutout 7a wedge-shaped under No.1, and the displacement at lower half block joint is fixed, passes through shearing here
Water shutoff item in block can occur elongation strain and realize the sealing of joint both ends straight down.By in the long hole at the top of upper shear box
Fastening soket head cap screw upper shear box 3 is connected with wedge shape cutout 7a under No.1, but do not exert oneself；Pass through upper positioning simultaneously
Wedge shape shearing block 6a in No.1 and upper shear box 3 are fastenedly connected by soket head cap screw 8a, then will fasten soket head cap screw tightening.?
After upper shear box is placed, hex screw 24 is adjusted, is closely connect upper and lower shear box by pressure roller block 25 and its bearing assembly
Touching.Here water shutoff item out most importantly will be extended in both side plate using electrical grinding machine and carry out equating, finally by seal capsule 11
It is mounted on both side plate 2, it, can be by the silica gel plate in seal capsule 11 since the upper half block at joint is moved relative to lower shear box
18 pieces of lower semisection smears liquid silica gel, upper half end coating lubricating oil, to reduce the shadow to rub in shear history to the full extent
It rings.
(3) shear box for installing sample is put into scheduled test station, with stainless steel tube by shear box water in-out port
Channel be connected with hydraulic pressure loading system is entered and left, and exhalant canal and flowmeter are connected；Check whether each system is normal
Work carries out the shearing seepage tests of rock joint later.
Claims (9)
1. the full shear-seepage coupling test of rock joint shears seepage flow box under a kind of Thief zone pressure, which is characterized in that described to cut
Cutting seepage flow box includes upper cartridge body for placing rock sample (4) and lower box body, setting in rock sample (4) width direction two sides
Side plate (2), the cushion cap (29) of lower box body bottom is set and is pressed in above rock sample (4) normal direction load cushion block
(27), the upper cartridge body, lower box body and side plate (2) are collectively formed one for placing the cavity of rock sample (4), the lower box
Body and side plate (2) are bolted, and the middle part of side plate (2) is equipped with rectilinear orbit (26), and the upper cartridge body is placed on the straight line
On track (26), enter aquaporin (12) in the upper cartridge body equipped with what is be connected to cavity, is equipped in the lower box body and cavity connects
Logical exhalant canal (14)；
The upper cartridge body includes the upper shear box (3) and upper fixed shear of upper plate (30), setting at upper plate (30) both ends
Block (5b) and the upper mobile cutout being arranged between upper shear box (3) and rock sample (4), the rock sample (4)
Side is close to upper fixed shear block (5b), and the other side of rock sample (4) passes through upper mobile cutout and the upper shear box
(3) it connects, the upper plate (30), upper shear box (3) and upper fixed shear block (5b) are integrally formed, the upper plate
(30) middle part is equipped with the through-hole of rectangle, and the through-hole that normal direction load cushion block (27) passes through the rectangle is pressed in rock sample (4)
Top, and upper plate (30) is placed on rectilinear orbit (26).
2. the full shear-seepage coupling test of rock joint shears seepage flow under a kind of Thief zone pressure according to claim 1
Box, which is characterized in that the upper mobile cutout include in No.1 wedge shape shearing block (6a) and No. two it is upper wedge shape shearing block (6b),
The top surface of wedge shape shearing block (6a) is fixed by fastening soket head cap screw (9) and upper plate (30) in the No.1, wedge in No.1
The one side of shape cutout (6a) is close to rock sample (4), and the other side is wedge shaped, described No. two upper wedge shape shearing block (6b)
Side is adjacent to upper shear box (3), and the other side is to cut with the wedge shape that wedge shape shearing block (6a) matches in No.1, No. two upper wedge shapes
The top of stripping and slicing (6b) is vertically moved with upper plate (30) by upper positioning soket head cap screw (8a) and is connect.
3. the full shear-seepage coupling test of rock joint shears seepage flow under a kind of Thief zone pressure according to claim 1
Box, which is characterized in that the lower box body include lower plate (31), setting lower plate (31) both ends lower shear box (1) and
Lower fixed shear block (5a) and the lower mobile cutout being arranged between lower shear box (1) and rock sample (4), the rock
The side of sample (4) is close to lower fixed shear block (5a), the other side of rock sample (4) by lower mobile cutout with it is described
Lower shear box (1) connection；The top of the lower fixed shear block (5a) and the bottom of mobile cutout upper in the upper cartridge body connect
Touching connection, the lower plate (31), lower shear box (1) and lower fixed shear block (5a) are integrally formed.
4. the full shear-seepage coupling test of rock joint shears seepage flow under a kind of Thief zone pressure according to claim 3
Box, which is characterized in that the lower mobile cutout includes wedge shape cutout (7b) under wedge-shaped cutout (7a) and No. two under No.1,
The bottom surface and lower plate (31) of wedge-shaped cutout (7a) connect under the No.1, the top surface of wedge-shaped cutout (7a) under No.1
It is connected with the bottom surface of upper fixed shear block (5b), the one side of wedge-shaped cutout (7a) and rock sample (4) are tight under No.1
Patch, the other side is wedge shaped, and the side of wedge-shaped cutout (7b) is adjacent to lower shear box (1) under described No. two, and the other side is and one
The wedge shape that wedge-shaped cutout (7a) matches under number, the bottom of wedge-shaped cutout (7b) passes through lower positioning soket head cap screw under No. two
(8b) is vertically moved with lower plate (31) and is connect.
5. the full shear-seepage coupling test of rock joint shears seepage flow under a kind of Thief zone pressure according to claim 4
Box, which is characterized in that wedge shape shearing block (6a), lower fixed shear block (5a) and rock sample (4) three cross in the No.1
Place is equipped with into water channel port (13), it is described enter aquaporin (12) through lower fixed shear block (5a) and enter water channel port (13) even
It is logical；
Wedge-shaped cutout (7a), upper fixed shear block (5b) and rock sample (4) three intersection are equipped with water outlet under the No.1
Passway (15), the exhalant canal (14) are connected to through upper fixed shear block (5b) with exhalant canal mouth (15)；
Wedge shape shearing block (6a) is cut with lower fixation between wedge shape shearing block (6a) and rock sample (4), in No.1 in the No.1
Between stripping and slicing (5a), between lower fixed shear block (5a) and rock sample (4), wedge-shaped cutout (7a) and rock sample under No.1
(4) between, under No.1 between wedge-shaped cutout (7a) and upper fixed shear block (5b), upper fixed shear block (5b) and rock sample
(4) water shutoff item (10) are equipped between.
6. the full shear-seepage coupling test of rock joint shears seepage flow under a kind of Thief zone pressure according to claim 5
Box, which is characterized in that the water shutoff item (10) includes that the trapezoidal of one side of rectangular strip is arranged in rectangular strip and integrated molding
Item.
7. the full shear-seepage coupling test of rock joint shears seepage flow under a kind of Thief zone pressure according to claim 5
Box, which is characterized in that the upper end of the upper plate (30) set there are two for compress in No.1 wedge shape shearing block (6a) with it is lower solid
Determine between cutout (5a) and under No.1 between wedge-shaped cutout (7a) and upper fixed shear block (5b) water shutoff item (10) bearing
Part, the bearing part include two deep groove ball bearings (22) of pressure roller shaft (23) and setting on pressure roller shaft (23), two institutes
It states deep groove ball bearing (22) and wedge shape shearing block (6a) and lower fixed shear block in simultaneously face No.1 is respectively set on upper plate (30)
Water shutoff item (10) between wedge-shaped cutout (7a) and upper fixed shear block (5b) between (5a) and under No.1.
8. the full shear-seepage coupling test of rock joint shears seepage flow under a kind of Thief zone pressure according to claim 7
Box, which is characterized in that open up through-hole in the middle part of the side plate (2) and rock sample (4) contact surface, be fixed on the outside of through-hole
Side plate cushion block (17) places seal capsule (11) in the through-hole, and one end of the seal capsule (11) passes through screw (16) and side
Board spacer (17) is fixedly connected, and the other end of seal capsule (11) is close to rock sample (4), and in seal capsule (11) and rock
Silica gel plate (18) are placed between stone sample (4)；
The inner wall of side plate (2) upper end opens up U-type groove, and the pressure roller shaft (23) is erected at two opposite U-type grooves of side plate (2)
It is interior, and bearing assembly side plate (2) fixation therewith is made by nut (19) compression；The top of pressure roller shaft (23) in U-type groove
It is arranged pressure roller block (25), the upper edge fastening that the pressure roller block (25) passes through hex screw (24) and side plate (2).
9. the full shear-seepage coupling test of rock joint shears seepage flow under a kind of Thief zone pressure according to claim 1
Box, which is characterized in that equipped with being vertically arranged between the inner wall of the through-hole of normal direction load cushion block (27) and upper plate (30)
Ball (28).
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