CN112504872A - Rock structural surface shearing creep device capable of realizing dry-wet circulation - Google Patents
Rock structural surface shearing creep device capable of realizing dry-wet circulation Download PDFInfo
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- 238000010008 shearing Methods 0.000 title claims abstract description 133
- 239000011435 rock Substances 0.000 title claims abstract description 76
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 238000013519 translation Methods 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 43
- 238000006073 displacement reaction Methods 0.000 claims description 17
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 abstract description 12
- 229920006395 saturated elastomer Polymers 0.000 abstract description 8
- 230000009471 action Effects 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 8
- 230000001351 cycling effect Effects 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
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- 230000000737 periodic effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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- 230000000630 rising effect Effects 0.000 description 1
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention discloses a rock structural surface shearing creep deformation device capable of realizing dry-wet circulation, which comprises an upper shearing box, a lower shearing box, a guide post and a translation mechanism, wherein the upper shearing box and the lower shearing box are all open and are oppositely arranged to form a cavity for accommodating rocks, the total height of the rocks is greater than that of the cavity in the upper shearing box and the lower shearing box, and a structural surface is positioned in a gap interval of the upper shearing box and the lower shearing box; the upper shearing box is provided with at least two dry and wet circulating holes, the dry and wet circulating holes are positioned at the periphery of a cavity for accommodating rocks, the outer walls of the upper shearing box and the lower shearing box are same in size and are in sealing connection, and circulating channels are formed and can be communicated through the structural surface of the rocks; the upper shearing box and the lower shearing box are arranged on the guide post in a penetrating mode, the guide post is arranged on the base of the translation mechanism, and the lower shearing box is arranged on the sliding plate of the translation mechanism. The device is low in cost, simple, convenient and practical, can realize the shearing experiment of the rock structural surface in a saturated or unsaturated state, and can realize the shearing creep experiment operation of the rock structural surface after the dry-wet cycle action.
Description
Technical Field
The invention relates to the technical field of rock structural surface shear creep, in particular to a rock structural surface shear creep device capable of realizing dry-wet circulation.
Background
In the long-term operation of reservoir water storage, the periodic fluctuation of reservoir water level causes the reservoir bank slope to be in the saturated and unsaturated dry-wet cycle process for a long time. The long-term dry-wet cycle causes the physical property of the rock structural surface of the bank side slope to be degraded, and finally causes the stability of the bank side slope to be damaged, thereby seriously affecting the reservoir safety. At present, most of reservoirs have long running time, and bank slope instability risks under long-term water level fluctuation conditions generally exist. In the case of reservoir instability, most of the reservoir instability is related to instability damage of a bank slope structural surface and a weak surface, so that research on the shear creep property of a rock structural surface under the action of dry-wet circulation is necessary for evaluating the stability of the bank slope.
Under the action of dry-wet circulation, the physical properties of the rock mass structural surface have a deterioration effect, and the structural surface is deteriorated in mechanical strength, cohesion, internal friction angle and the like to different degrees, and creep deformation generated on the structural surface under the action of long-term dry-wet is an important reason for reducing the stability of the side slope, and finally the side slope is unstable.
At present, the traditional shear creep of a rock structural surface is that an upper rock test piece and a lower rock test piece are usually placed into a container to be soaked, the upper rock test piece and the lower rock test piece are taken out after the test to dry a structural surface material, and finally the shear creep test is carried out, so that repeated dry-wet cycle operation divides the shear creep test into two mutually independent steps, the operation process is complicated, excessive manual operation is carried out on the test piece, the rock material is easily damaged, the rock body damage is caused, and the test result and the real situation generate large errors. This has the further disadvantage that shear testing of the structural surface in the saturated state cannot be achieved.
Disclosure of Invention
The invention aims to provide a rock structural surface shear creep device capable of realizing dry-wet circulation, which is used for solving the problems in the prior art, so that the dry-wet circulation operation in the rock structural surface shear creep experimental device is convenient, the dry-wet circulation times can be controlled, and the shear creep experiment of the rock structural surface in a saturated or unsaturated state can be realized.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a rock structural surface shearing creep deformation device capable of realizing dry-wet circulation, which comprises an upper shearing box, a lower shearing box, a guide column and a translation mechanism, wherein the upper shearing box and the lower shearing box are both open and oppositely arranged to form a cavity for accommodating two oppositely arranged rocks, the total height of the two rocks is greater than that of the cavity in the upper shearing box and the lower shearing box, and the structural surface of the rock is positioned in a gap interval between the upper shearing box and the lower shearing box; the upper shearing box is provided with at least two dry and wet circulating holes, the dry and wet circulating holes are positioned at the periphery of a cavity for accommodating the rock and are used for connecting a water source or dry hot air, the outer walls of the upper shearing box and the lower shearing box are the same in size and are connected in a sealing manner to form a water or gas circulating channel, and the circulating channels can be communicated through the structural surface of the rock; the upper shearing box and the lower shearing box are arranged on the guide post in a penetrating mode, the guide post is arranged on the base of the translation mechanism, the lower shearing box is arranged on the sliding plate of the translation mechanism, the sliding plate and the base can slide relatively, the top of the upper shearing box can be used for applying normal pressure, and the side wall of the lower shearing box can be used for applying transverse shearing force.
Preferably, the upper shearing box and the lower shearing box are respectively internally provided with a locking mechanism for rock displacement adjustment, the locking mechanism comprises a baffle and a bolt, the baffle is arranged in the cavity of the upper shearing box or the lower shearing box, and the bolt penetrates through the cavity wall of the upper shearing box or the lower shearing box and is connected with the baffle, so that the two structural planes of the rocks are aligned.
Preferably, the height of the baffle is less than the height of the corresponding rock, and the baffles are respectively positioned on the opposite surfaces of the cavity.
Preferably, the dry-wet circulation hole comprises an air inlet hole, an air outlet hole, a water inlet hole and a water outlet hole which are uniformly distributed at the top of the upper shearing box, the air inlet hole and the air outlet hole, and the water inlet hole and the water outlet hole are respectively positioned on the opposite surfaces of the upper shearing box, and the air outlet hole is communicated with the air pump through a pipeline.
Preferably, a humidity sensor is arranged in the air outlet or on a pipeline communicated with the air outlet, and valves are arranged on pipelines communicated with the air inlet, the water inlet, the air outlet and the water outlet.
Preferably, a drain hole is formed in the lower shearing box, one end of the drain hole is communicated with the circulating channel, the other end of the drain hole is communicated with a water collecting tank through a pipeline, and the pipeline is provided with a valve.
Preferably, the translation mechanism comprises a base, rollers and a sliding plate, the base is concave, a plurality of rollers are arranged in the base in parallel with the side walls of the base, the sliding plate is arranged on the rollers, and the length of the sliding plate is smaller than the distance between the two side walls of the base.
Preferably, an installation limiting bolt is arranged on the side wall of the base and can abut against the side wall of the lower shearing box.
Preferably, a displacement sensor is arranged on the side wall of the base and is positioned on one side of the mounting limit bolt.
Preferably, the top of going up the shear box with the side of shearing the box down is provided with the round platform that is used for the application of force respectively, go up the shear box with the outer wall of shearing the box down is sealed through a round apron, apron wherein one side can be dismantled.
Compared with the prior art, the invention has the following technical effects:
the invention can provide a dry-wet cycle closed environment for a rock structural surface, more conveniently carry out dry-wet cycle operation, greatly reduce the influence of human factors in the dry-wet cycle process, simulate the actual dry-wet cycle working condition and improve the experimental precision; saturated water is introduced into the cavity of the shearing box, so that the automatic rising of the water level can be simulated, the falling of the water level can be realized by utilizing the drain holes, the fluctuation situation of the water level of the hydro-fluctuation belt of the actual reservoir slope can be better met, the structure is simple, and the operation is convenient; the device is low in cost, simple, convenient and practical, can realize the shearing experiment of the rock structural plane in a saturated or unsaturated state, and realizes the shearing creep experiment operation of the shearing structural plane after the dry-wet cycle effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram I of a rock structural plane shear creep device capable of dry-wet cycling according to the present invention;
FIG. 2 is a schematic structural diagram II of a rock structural plane shear creep device capable of dry-wet cycling according to the present invention;
FIG. 3 is a schematic diagram of the internal structure of a rock structural face shear creep apparatus of the present invention capable of dry-wet cycling;
wherein: 1-upper shearing box, 2-lower shearing box, 3-guide column, 4-circular table, 5-enclosure baffle, 6-rock, 7-structural surface, 8-baffle, 9-bolt, 10-circulating channel, 11-air inlet hole, 12-air outlet hole, 13-water inlet hole, 14-water outlet hole, 15-water outlet hole, 16-base, 17-rolling shaft, 18-sliding plate, 19-mounting limit bolt and 20-displacement sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
The invention aims to provide a rock structural surface shear creep device capable of realizing dry-wet circulation, which is used for solving the problems in the prior art, so that the dry-wet circulation operation in the rock structural surface shear creep experimental device is convenient, the dry-wet circulation times can be controlled, and the shear creep experiment of the rock structural surface in a saturated or unsaturated state can be realized.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 to 3: the embodiment provides a rock structural surface shearing creep device capable of realizing dry-wet circulation, which comprises an upper shearing box 1, a lower shearing box 2, a guide post 3 and a translation mechanism, wherein the upper shearing box 1 and the lower shearing box 2 are both open and oppositely arranged to form a cavity for accommodating two oppositely arranged rocks 6, the total height of the two rocks 6 is greater than that of the cavities in the upper shearing box 1 and the lower shearing box 2, and a structural surface 7 of the rocks 6 is positioned in a gap interval between the upper shearing box 1 and the lower shearing box 2; the upper shearing box 1 is provided with at least two dry and wet circulating holes, the dry and wet circulating holes are positioned at the periphery of a cavity for containing the rock 6 and are used for connecting a water source or dry hot air, the outer walls of the upper shearing box 1 and the lower shearing box 2 are the same in size and are hermetically connected to form a water or gas circulating channel 10, and the circulating channel 10 can be communicated through a structural surface 7 of the rock 6; on the guide post 3 was all worn to locate by last shearing box 1 and lower shearing box 2, guide post 3 set up on translation mechanism's base 16, lower shearing box 2 sets up on translation mechanism's sliding plate 18, sliding plate 18 and base 16 can the relative slip, the top of going up shearing box 1 can be used for applying normal pressure, and the lateral wall of lower shearing box 2 can be used for applying horizontal shearing force. The top of the upper shearing box 1 and the side of the lower shearing box 2 are respectively provided with a round table 4 for applying force, the outer walls of the upper shearing box 1 and the lower shearing box 2 are connected and sealed through a circle of baffle plates 5 in a clamping manner, and the baffle plates 5 can be detached from one side of the baffle plates 5 so as to facilitate the disassembly and assembly of the baffle plates 5.
The locking mechanisms used for adjusting the displacement of the rocks 6 are respectively arranged in the upper shearing box 1 and the lower shearing box 2 and comprise a baffle plate 8 and a bolt 9, the baffle plate 8 is arranged in a cavity of the upper shearing box 1 or the lower shearing box 2, and the bolt 9 penetrates through the cavity wall of the upper shearing box 1 or the lower shearing box 2 to be connected with or abutted against the baffle plate 8, so that the structural planes 7 of the two rocks 6 are aligned. Baffle 8 highly be less than corresponding rock 6's height (be less than the cavity terminal surface in this embodiment), and baffle 8 is located the opposite face of cavity respectively, because there is little error in rock 6 (test piece) volume for the experiment, through locking mechanism's lateral adjustment, the alignment of the structural plane 7 of the rock 6 of being convenient for reduces experimental error.
The dry-wet circulation hole comprises an air inlet hole 11, an air outlet hole 12, a water inlet hole 13 and a water outlet hole 14 which are uniformly distributed at the top of the upper shearing box 1, the air inlet hole 11 and the air outlet hole 12, and the water inlet hole 13 and the water outlet hole 14 are respectively positioned on the opposite surfaces of the upper shearing box 1, and the air outlet hole 12 is communicated with the air extracting pump through a pipeline. A humidity sensor is arranged in the air outlet 12 or on a pipeline communicated with the air outlet 12, so that the humidity change in the cavity of the rock 6 can be recorded, and the time of dry-wet circulation can be conveniently mastered. And valves are arranged on pipelines communicated with the air inlet hole 11, the air outlet hole 12, the water inlet hole 13 and the water outlet hole 14, so that the sealing of the circulating channel 10 is ensured conveniently. The lower shearing box 1 is provided with a drain hole 15, one end of the drain hole 15 is communicated with the circulating channel 10, the other end of the drain hole 15 is communicated with a water collecting tank through a pipeline, and the pipeline is provided with a valve. Compared with the traditional dry-wet circulation operation method, the dry-wet circulation operation method has the advantages that the structure is simple, the dry-wet circulation operation is more convenient, the influence of human factors in the dry-wet circulation process is greatly reduced, the simulation of the actual dry-wet circulation working condition is more fitted, and the experiment precision is improved.
The translation mechanism comprises a base 16, rollers 17 and a sliding plate 18, the base 16 is concave, so that the movement displacement of the rollers 17 is limited, the rollers 17 are arranged in the base 16 in parallel with the side walls of the base 16, the sliding plate 18 is arranged on the rollers 17, the length of the sliding plate 18 is smaller than the distance between the two side walls of the base 16, and the sliding plate 18 and the lower shearing box 2 can slide in the base 16 when transverse shearing force is applied. The side wall of the base 16 is provided with a mounting limit bolt 19, and the mounting limit bolt 19 can abut against the side wall of the lower shearing box 2. And a displacement sensor 20 is arranged on the side wall of the base 16, and the displacement sensor 20 is positioned on one side of the mounting limit bolt 19. Preferably, the displacement sensor 20 and the temperature sensor are electrically connected to a control device, so as to output experimental data.
The concrete using steps of the rock structural surface shear creep device capable of dry-wet cycling of the embodiment are as follows: the device is installed, placed stably and connected with a shear creep gauge. Before the experiment, the prestress can be applied according to the actual engineering situation to simulate the actual engineering pressure situation.
And in the dry-wet cycle operation process, valves on pipelines of the water outlet hole 14, the water outlet hole 15 and the water inlet hole 13 are closed, valves on pipelines of the air inlet hole 11 and the air outlet hole 12 are opened, and hot air is blown into the rock cavity of the up-down shearing box until the structural surface 7 of the rock 6 is completely dry. And closing a valve on the pipeline of the air inlet 11, opening an air pump to pump air, opening a valve on the pipeline of the water inlet 13, and pumping water into the rock cavity of the upper and lower shearing boxes until the structural surface 7 of the rock 6 is completely saturated. After the saturation process of the structural surface 7 is finished, a valve on a drain hole 15 pipeline of the lower shearing box 2 is opened, water stored in the middle rock cavity is drained, and the operation is repeated to finish dry-wet circulation for many times.
Shear creep operation process: the mounting limit bolt 19 is taken down, the displacement limitation of the lower shearing box 2 is removed, normal pressure is applied to act on the circular truncated cone 4 at the top of the upper shearing box, when the normal displacement is stable, transverse shearing force is applied to act on the circular truncated cone 4 on the side face of the lower shearing box 2, the lower shearing box 2 generates relative displacement on the base 16, the shearing stress is recorded by a stress sensor of the shearing creep gauge, and the shearing creep displacement is recorded by a displacement sensor 20. Wherein, shear the normal load that the creep appearance applys and add the dead weight of shearing box 1 on for the total normal load that receives on structural plane 7, total normal load ratio rock structural plane shearing area just can obtain normal stress. After the first-stage shear load test is completed, after the shear creep displacement reaches the stability, the next-stage shear load loading can be carried out for the test until the rock structural surface sample is damaged by the shear creep. After the experiment is finished, according to the conventional creep experiment process, the relation between creep displacement and time and the relation between normal stress and creep characteristics can be obtained by analyzing and processing experiment data.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. A rock structural face shear creep device capable of dry-wet cycle, which is characterized in that: the device comprises an upper shearing box, a lower shearing box, a guide column and a translation mechanism, wherein the upper shearing box and the lower shearing box are both open and oppositely arranged to form a cavity for accommodating two oppositely arranged rocks, the total height of the two rocks is greater than that of the cavity in the upper shearing box and the lower shearing box, and the structural plane of the rocks is positioned in a gap interval between the upper shearing box and the lower shearing box; the upper shearing box is provided with at least two dry and wet circulating holes, the dry and wet circulating holes are positioned at the periphery of a cavity for accommodating the rock and are used for connecting a water source or dry hot air, the outer walls of the upper shearing box and the lower shearing box are the same in size and are connected in a sealing manner to form a water or gas circulating channel, and the circulating channels can be communicated through the structural surface of the rock; the upper shearing box and the lower shearing box are arranged on the guide post in a penetrating mode, the guide post is arranged on the base of the translation mechanism, the lower shearing box is arranged on the sliding plate of the translation mechanism, the sliding plate and the base can slide relatively, the top of the upper shearing box can be used for applying normal pressure, and the side wall of the lower shearing box can be used for applying transverse shearing force.
2. The dry-wet recyclable rock structural face shear creep device of claim 1, wherein: the upper shearing box and the lower shearing box are respectively internally provided with a locking mechanism for rock displacement adjustment, the locking mechanism comprises a baffle and a bolt, the baffle is arranged in the cavity of the upper shearing box or the lower shearing box, and the bolt penetrates through the cavity wall of the upper shearing box or the lower shearing box and is connected with the baffle, so that the two structural surfaces of the rocks are aligned.
3. The apparatus of claim 2, wherein: the height of the baffle is smaller than the height of the corresponding rock, and the baffle is respectively positioned on the opposite surfaces of the cavity.
4. The dry-wet recyclable rock structural face shear creep device of claim 1, wherein: the dry-wet circulation hole comprises an air inlet hole, an air outlet hole, a water inlet hole and a water outlet hole which are uniformly distributed at the top of the upper shearing box, the air inlet hole and the air outlet hole, the water inlet hole and the water outlet hole are respectively positioned on the opposite surfaces of the upper shearing box, and the air outlet hole is communicated with the air pump through a pipeline.
5. The apparatus of claim 4, wherein: and a humidity sensor is arranged in the air outlet or on a pipeline communicated with the air outlet, and valves are arranged on the pipelines communicated with the air inlet, the water inlet, the air outlet and the water outlet.
6. The dry-wet recyclable rock structural face shear creep device of claim 1, wherein: the lower shearing box is provided with a drain hole, one end of the drain hole is communicated with the circulating channel, the other end of the drain hole is communicated with a water collecting tank through a pipeline, and the pipeline is provided with a valve.
7. The dry-wet recyclable rock structural face shear creep device of claim 1, wherein: the translation mechanism comprises a base, rolling shafts and a sliding plate, the base is concave, a plurality of rolling shafts are arranged in the base in a manner of being parallel to the side walls of the base, the sliding plate is arranged on the rolling shafts, and the length of the sliding plate is smaller than the distance between the two side walls of the base.
8. The apparatus of claim 7, wherein: the side wall of the base is provided with an installation limiting bolt, and the installation limiting bolt can abut against the side wall of the lower shearing box.
9. The apparatus of claim 8, wherein: and a displacement sensor is arranged on the side wall of the base and is positioned on one side of the mounting limit bolt.
10. The dry-wet recyclable rock structural face shear creep device of claim 1, wherein: the top of going up the shearing box with the side of shearing box down is provided with the round platform that is used for the application of force respectively, go up the shearing box with the outer wall of shearing box down is sealed through a round apron, apron wherein one side can be dismantled.
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| CN202011298025.6A CN112504872A (en) | 2020-11-19 | 2020-11-19 | Rock structural surface shearing creep device capable of realizing dry-wet circulation |
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| CN202011298025.6A CN112504872A (en) | 2020-11-19 | 2020-11-19 | Rock structural surface shearing creep device capable of realizing dry-wet circulation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113029821A (en) * | 2021-03-31 | 2021-06-25 | 重庆科创职业学院 | Direct shear box for researching mechanical characteristics of contact surface |
| CN113324854A (en) * | 2021-05-31 | 2021-08-31 | 西华大学 | Soil sample strength testing device and experimental method thereof |
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| CN106442169A (en) * | 2016-09-28 | 2017-02-22 | 中国地质大学（武汉） | Rock and earth mass shear apparatus taking water-rock interaction into consideration |
| CN108020473A (en) * | 2018-01-03 | 2018-05-11 | 中国电建集团华东勘测设计研究院有限公司 | Consider the Rock And Soil cutting creep instrument and its test method of drying and watering cycle |
| CN207717541U (en) * | 2018-01-03 | 2018-08-10 | 中国电建集团华东勘测设计研究院有限公司 | Consider the Rock And Soil cutting creep instrument of drying and watering cycle |
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| CN113029821A (en) * | 2021-03-31 | 2021-06-25 | 重庆科创职业学院 | Direct shear box for researching mechanical characteristics of contact surface |
| CN113324854A (en) * | 2021-05-31 | 2021-08-31 | 西华大学 | Soil sample strength testing device and experimental method thereof |
| CN113324854B (en) * | 2021-05-31 | 2022-07-22 | 西华大学 | Soil sample strength testing device and experimental method thereof |
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