CN212964408U - A high-efficient experimental apparatus for rock mechanics triaxial experiment - Google Patents
A high-efficient experimental apparatus for rock mechanics triaxial experiment Download PDFInfo
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- CN212964408U CN212964408U CN202021788421.2U CN202021788421U CN212964408U CN 212964408 U CN212964408 U CN 212964408U CN 202021788421 U CN202021788421 U CN 202021788421U CN 212964408 U CN212964408 U CN 212964408U
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Abstract
The utility model relates to a high-efficient experimental apparatus for rock mechanics triaxial experiment, including the experiment cabin, it from the top down comprises top cap, sleeve and bottom in proper order, and top cap and bottom set up respectively on the sleeve mouthful and end opening, sleeve, top cap and bottom form big confining pressure room jointly, and the bottom sets up total axial force loading device and piecemeal axial force loading device respectively, can apply ascending loading force, and the interior branch confining pressure section of thick bamboo that sets up and piecemeal axial force loading device one-to-one of confining pressure room, each divides the confining pressure section of thick bamboo and can apply independent confining pressure respectively. Under integrated control device's control, after confining pressure and temperature were applyed and are accomplished, the device can carry out the experiment of different confining pressures under the same temperature condition to multiple or the same kind polylith rock sample to promote rock triaxial test's efficiency by a wide margin, remove the process of repeated loading from, and can obtain the real-time loading change process and the stress strain curve of different samples, form the contrast experiment.
Description
Technical Field
The utility model belongs to the technical field of the rock mechanics experiment, concretely relates to a high-efficient experimental apparatus for rock mechanics triaxial experiment.
Background
With the implementation of three national strategies of 'one-road-in-one' construction, Jingjin Ji collaborative development and Yangtze economic belt development, underground space engineering in China is further developed, and projects such as roadways and tunnels emerge on a large scale. The rock disasters of underground engineering, such as serious deformation of a roadway, water inrush of a tunnel and the like, involved in the construction process of the underground engineering generally tend to rise, so that the safety construction and the economic benefit of the underground engineering are directly influenced, even the support is seriously damaged, and the personal safety is endangered.
The essential reason of the disasters such as deformation, damage and the like of underground engineering rock mass is that the original stress balance of the original rock is damaged by excavation activities, and the mechanical behavior of the rock mass is closely related to the excavation process and the like. The underground engineering rock mass such as a roadway and the like is usually in a three-dimensional original rock stress state before excavation, and the excavation process breaks through the original stress balance state, so that the three-dimensional stress field of the surrounding rock is redistributed. Therefore, the rock mechanics triaxial experiment based on the three-dimensional stress path caused by excavation has very important significance for large-scale construction of underground rock mass engineering, design of a surrounding rock stability control scheme and early warning of major engineering geological disasters.
The triaxial test of rock mechanics is also called triaxial rock compression test or triaxial rock stress test, and is a test for applying pressure load to a rock test piece in three orthogonal directions so as to determine the strength and deformation characteristics of the test piece under the stress state. The existing triaxial experimental instrument can only carry out experiment on one sample by adding and unloading confining pressure at one time, cannot form a contrast experiment, and wastes time.
Disclosure of Invention
An object of the utility model is to provide a high-efficient experimental apparatus for rock mechanics triaxial experiment to overcome current experimental apparatus and can't carry out loaded shortcoming to being in multiple or polylith rock sample of the same kind under the different confined pressures.
The utility model aims at realizing through the following technical scheme:
a high-efficiency experimental device for triaxial experiments of rock mechanics comprises an experiment chamber 8, wherein the experiment chamber 8 consists of a top cover 11, a sleeve 12 and a bottom cover 13 from top to bottom in sequence;
wherein, the top cover 11 is arranged at the upper opening of the sleeve 12, and the bottom cover 13 is arranged at the lower opening of the sleeve 12; the top cover 11, the sleeve 12 and the bottom cover 13 form a large confining pressure chamber together, and an oil inlet 133 and an oil outlet 112 are respectively formed in the large confining pressure chamber;
the bottom cover 13 is provided with an axial force loading device 7, and the axial force loading device 7 comprises a total axial force loading device and a block axial force loading device 143 and can apply upward loading force;
the large confining pressure chamber is also internally provided with sub confining pressure cylinders 14 which are in one-to-one correspondence with the partitioning axial force loading devices 143, and each sub confining pressure cylinder 14 is provided with a sub confining pressure loading device 144 which can respectively apply independent confining pressure;
the device also comprises a confining pressure loading device 5, a temperature control device 6 and a data acquisition system 9 which are connected with the experiment chamber 8; the confining pressure loading device 5 is used for applying confining pressure to the experiment cabin 8; the temperature control device 6 is in control connection with a heating device, and the heating device is connected with the sleeve 12; the confining pressure loading device 5, the temperature control device 6 and the axial force loading device 7 are connected with a computer; by applying confining pressure and temperature, experiments of different confining pressures under the same temperature condition can be carried out on multiple or the same multiple rock samples.
Preferably, the top cover 11 includes an upper cover layer 111, which is provided with an oil outlet 112, and an upper sealing ring 113 is disposed between the lower portion of the top cover 11 and the sleeve 12.
Preferably, the bottom cover 13 includes a lower cover 131 having an oil inlet 133, and a lower sealing ring 132 is disposed between the bottom cover 13 and the sleeve 12.
Preferably, the confining pressure cylinder 14 can load 9 samples, and is disposed in a boss through hole above the lower cover layer 131, and the boss through hole is internally provided with corresponding mutually independent partitioning axial force loading devices 143.
Preferably, the surrounding pressure cylinder 14 is provided with a cylinder oil inlet 141 and a cylinder oil outlet 142, and the upper and lower ends of the surrounding pressure cylinder 14 are sleeved with a cylinder upper sealing ring 145 and a cylinder lower sealing ring 146.
Preferably, the heating device comprises a heating jacket clamp 10 and a control device, the heating jacket clamp 10 is clamped outside a sleeve 12, and a temperature probe is arranged inside the sleeve 12 and connected with the temperature control device 6.
Preferably, the upper sealing ring 113, the lower sealing ring 132, the upper split sealing ring 145 and the lower split sealing ring 146 are all made of perfluoroether rubber materials.
Preferably, the pressurization system of the axial force loading device 7 adopts hydraulic pressurization.
Preferably, the hydraulic oil pump control system further comprises a hydraulic oil pump control panel 1, a temperature loading control panel 2 and a hydraulic control system panel 3, wherein the hydraulic oil pump control panel 1, the temperature loading control panel 2 and the hydraulic control system panel 3 are respectively connected with a computer 4 to form an integrated control panel.
Preferably, the hydraulic oil pump control panel 1 is used for controlling the injection of the hydraulic oil from the oil inlet hole 133 and the injection of the hydraulic oil from the sub-cylinder oil inlet hole 141 of the sub-confining pressure cylinder 14 into the sub-confining pressure cylinder 14.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model discloses experimental apparatus can carry out the experiment of different confined pressures under the same temperature condition to multiple or the same kind polylith rock sample to promote rock triaxial test's efficiency by a wide margin, remove the process that repeated loading from, and can obtain the real-time loading variation process and the stress strain curve of different samples, form the contrast experiment.
Drawings
FIG. 1 is a schematic flow chart of the high-efficiency experimental device for triaxial experiment of rock mechanics;
FIG. 2 is a diagram of the experimental cabin of the high-efficiency experimental facility for triaxial experiment of rock mechanics;
FIG. 3 is a split view of the experimental chamber of the high-efficiency experimental device for triaxial experiment of rock mechanics;
FIG. 4 is a high-efficiency experimental apparatus for rock mechanics triaxial experiment of the present invention is a confining pressure cylinder diagram;
FIG. 5 is a sectional view of a confining pressure cylinder of the high-efficiency experimental apparatus for triaxial experiment of rock mechanics;
in the figure, 1, a hydraulic oil pump control panel 2, a temperature loading control panel 3, a hydraulic control system panel 4, a computer 5, a confining pressure loading device 6, a temperature control device 7, an axial force loading device 8, an experiment chamber 9, a data acquisition system 10, a heating jacket clamp 11, a top cover 12, a sleeve 13, a bottom cover 14, a confining pressure cylinder 111, an upper cover layer 112, an oil outlet 113, an upper sealing ring 131, a lower cover layer 132, a lower sealing ring 133, an oil inlet 141, a cylinder separating oil inlet 142, a cylinder separating oil outlet 143, a block separating axial force loading device 144, a cylinder separating confining pressure loading device 145, a cylinder separating upper sealing ring 146 and a cylinder separating lower sealing ring.
Detailed Description
Examples
As shown in fig. 1, the utility model discloses a high-efficient experimental apparatus for rock mechanics triaxial experiment comprises hydraulic pressure oil pump control panel 1,. temperature loading control panel 2, hydraulic control system panel 3, computer 4, confined pressure loading device 5, temperature control device 6, axial force loading device 7, experiment cabin 8 and data acquisition system 9.
The hydraulic oil pump control panel 1, the temperature loading control panel 2 and the hydraulic control system panel 3 are respectively connected with the computer 4 to form an integrated control panel; the computer is in control connection with the confining pressure loading device 5, the temperature control device 6 and the axial force loading device 7; the confining pressure loading device 5, the temperature control device 6 and the axial force loading device 7 are connected with an experiment chamber 8; the experiment chamber 8 is connected with a data acquisition system 9. After the confining pressure and the temperature are applied, the rock mechanics triaxial tester can perform experiments of different confining pressures on multiple or same rock samples under the same temperature condition.
As shown in fig. 3, the experimental chamber 8 is composed of a top cover 11, a sleeve 12 and a bottom cover 13 from top to bottom; the top cover 11 is arranged at the upper opening of the sleeve 12, and the bottom cover 13 is arranged at the lower opening of the sleeve; the top cover 11, the sleeve 12 and the bottom cover 13 together form a large confining pressure chamber, and an oil inlet 133 and an oil outlet 112 are respectively arranged in the large confining pressure chamber.
The top cover 11 comprises an upper cover layer 111, an oil outlet 112 is formed in the upper cover layer, and an upper sealing ring 113 is arranged between the lower portion of the top cover 11 and the sleeve 12. The top cover 11 is fixed and immovable, and is loaded by upward displacement of the bottom cover 13.
The bottom cover 13 includes a bottom cover 131 having an oil inlet 133, and a bottom gasket 132 is disposed between the bottom cover 13 and the sleeve 12. In this embodiment, the upper sealing ring 113 and the lower sealing ring 132 are made of perfluoro ether rubber.
The bottom cover 13 is provided with an axial force loading device 7, and the axial force loading device 7 comprises a total axial force loading device and a block axial force loading device 143 which can apply upward loading force. In this embodiment, the pressurizing system of the axial force loading device 7 adopts hydraulic pressurization.
The large confining pressure chamber is also internally provided with the sub confining pressure cylinders 14 which are in one-to-one correspondence with the block axial force loading devices 143, and each sub confining pressure cylinder 14 can apply independent confining pressure respectively.
In this embodiment, the partial confining pressure cylinders are 9 in number and independent from each other, and are used for loading samples, and are disposed in the boss through holes above the lower cover layer 131, and the boss through holes are internally provided with corresponding independent block axial force loading devices.
In this embodiment, the confining pressure cylinder 14 is provided with a cylinder oil inlet 141 and a cylinder oil outlet 142, the upper and lower ends of the confining pressure cylinder 14 are sleeved with a cylinder upper sealing ring 145 and a cylinder lower sealing ring 146, and the confining pressure cylinder 14 is further provided with a partitioning axial force loading device 143 and a cylinder confining pressure loading device 144. In this embodiment, the upper cylinder-separating sealing ring 155 and the lower cylinder-separating sealing ring 156 are made of perfluoro ether rubber.
The temperature control device 6 is in control connection with a heating device, and the heating device is connected with the sleeve 12. In this embodiment, the heating device includes a heating jacket clamp 10 and a control device, the heating jacket clamp 10 is clamped outside the sleeve 12, and a temperature probe is arranged inside the sleeve 12 and connected with the temperature control device 6.
The hydraulic oil, the heating device and the vertical pressurization work are connected through a high-pressure valve and a pipeline and are coordinated to be opened and closed through the common work of the hydraulic oil, the heating device and the pipeline.
First, a sample is loaded, the sleeve 12 and the lower cap layer 131 are dropped downward by the axial force loading device 7 to be separated from the upper cap layer 111, then the sleeve 12 is removed, the divided pressure cylinder 14 is taken out of the lower cap layer 131, the sample is loaded, the divided pressure cylinder 14 with the sample loaded is loaded back into the lower cap layer 131, the sleeve 12 is mounted on the lower cap layer 131, and the lower cap layer 131 and the sleeve 12 are raised to the upper cap layer 111 by the axial force loading device 7.
Then, the liquid is filled, the panel 1 is controlled by the hydraulic oil pump, the hydraulic oil is first injected from the oil inlet 133, the injection is stopped until the hydraulic oil flowing out from the oil outlet 112 contains no bubbles, and the valve is closed. Then, the panel 1 is controlled by the hydraulic oil pump, and the hydraulic oil is injected into the partial pressure cylinder 14 from the cylinder oil inlet hole 141 of the partial pressure cylinder 14 until the hydraulic oil flowing out from the cylinder oil outlet hole 142 does not contain any air bubbles. Then, a heating operation is performed to heat the test chamber 8 with the heating jacket clamp 10.
Subsequently, carry out confining pressure loading operation, utilize confining pressure loading device 5 to exert confining pressure to experiment cabin 8 earlier, if the experiment requires same confining pressure, then can directly get into operation on next step, if set up the contrast experiment under the different confining pressure, then after confining pressure loading is accomplished, utilize a minute section of thick bamboo confining pressure loading device 5 to exert different confining pressure to each minute confining pressure section of thick bamboo 15, close the valve afterwards.
Then, carrying out axial force loading operation, if the same confining pressure and the same sample can be loaded by directly using the axial force loading device 7, monitoring the loading process by using the data acquisition system 9, recording data such as stress-strain curves and the like in real time, and forming a comparison experiment of the same sample; if the confining pressure is different or different samples are obtained, the samples in the confining pressure barrel 15 are loaded respectively by the split axial force loading device 7, a real-time comparison experiment can be formed by simultaneous loading, and the comparison is recorded by the data acquisition system 9.
Finally, advanced unloading and cleaning operations are carried out, after loading is completed, the sleeve 12 and the lower cover layer 131 are descended downwards by the axial force loading device 7 to be separated from the upper cover layer 111, then the sleeve 12 is taken down, the partial confining pressure cylinder 15 is taken out from the lower cover layer 131, the damage sample in the partial confining pressure cylinder 15 is taken out, the experiment chamber 8 and the partial confining pressure cylinder 15 are cleaned by cleaning liquid for 2-3 times, the cleaned partial confining pressure cylinder 15 is arranged back in the lower cover layer 131, the sleeve 12 is arranged on the lower cover layer 131, and the lower cover layer 131 and the sleeve 12 are lifted to the upper cover layer 111 by the axial force loading device 7.
In the simulation system device, the pressure and temperature application of the model can be adjusted according to the requirement, the temperature can reach 200 ℃, and the pressure can reach 10 MPa.
Use the utility model discloses when the analog system device carries out the heat energy replacement experiment, need slow release pressure after the experiment, after the reduce temperature, the experiment subassembly can be dismantled to the side.
After the experiment is finished, the inner side of the model body, the valve, the container and the like are cleaned, the cleaning liquid is emptied through the pipeline valve, the cleaning is repeatedly carried out for 2-3 times, and the next experiment is carried out.
In the simulation system device, the experiment chamber is heated firstly, and then the confining pressure is applied, so that the confining pressure is prevented from being changed by applying the confining pressure and then heating.
In the simulation system device, when the sleeve and the lower cover layer are lifted to the upper cover layer when the sample is loaded, a small axial pressure is applied to fix the sample, so that the sample is prevented from being pushed away from a fixed position when liquid is filled.
In the above simulation system device, the confining pressure value of each partial confining pressure cylinder can be set to be different, but should be larger than the confining pressure in the sleeve 12, so as to maintain the confining pressure of the partial confining pressure cylinder 15 stable.
Claims (10)
1. The utility model provides a high-efficient experimental apparatus for rock mechanics triaxial experiment which characterized in that: comprises an experiment cabin (8);
the experiment chamber (8) consists of a top cover (11), a sleeve (12) and a bottom cover (13) from top to bottom in sequence; the top cover (11) is arranged at the upper opening of the sleeve (12), and the bottom cover (13) is arranged at the lower opening of the sleeve; the top cover (11), the sleeve (12) and the bottom cover (13) form a large confining pressure chamber together, and an oil inlet hole (133) and an oil outlet hole (112) are formed in the large confining pressure chamber respectively;
the bottom cover (13) is provided with an axial force loading device (7), the axial force loading device (7) comprises a total axial force loading device and a block axial force loading device (143) and can apply upward loading force; the large confining pressure chamber is also internally provided with sub confining pressure cylinders (14) which are in one-to-one correspondence with the partitioning axial force loading devices (143), and each sub confining pressure cylinder (14) is provided with a sub cylinder confining pressure loading device (144) which can respectively apply independent confining pressure;
the device also comprises a confining pressure loading device (5), a temperature control device (6) and a data acquisition system (9) which are connected with the experiment chamber (8); the confining pressure loading device (5) is used for applying confining pressure to the experiment cabin (8); the temperature control device (6) is in control connection with a heating device, and the heating device is connected with the sleeve (12); the confining pressure loading device (5), the temperature control device (6) and the axial force loading device (7) are connected with the computer (4); by applying confining pressure and temperature, experiments of different confining pressures under the same temperature condition can be carried out on multiple or the same multiple rock samples.
2. The high-efficiency experimental device for the triaxial experiment of rock mechanics according to claim 1, wherein: the top cover (11) comprises an upper cover layer (111), an oil outlet (112) is formed in the upper cover layer, and an upper sealing ring (113) is arranged between the lower portion of the top cover (11) and the sleeve (12).
3. The high-efficiency experimental device for the triaxial experiment of rock mechanics according to claim 2, wherein: the bottom cover (13) comprises a lower cover layer (131) provided with an oil inlet hole (133), and a lower sealing ring (132) is arranged between the bottom cover (13) and the sleeve (12).
4. The high-efficiency experimental device for the triaxial experiment of rock mechanics according to claim 3, wherein: the confining pressure cylinders (14) can be used for loading samples, the number of the confining pressure cylinders is 9, the confining pressure cylinders are arranged in boss through holes above the lower cover layer (131), and corresponding mutually independent partitioning axial force loading devices (143) are arranged in the boss through holes.
5. The high-efficiency experimental device for triaxial experiments in rock mechanics according to claim 4, wherein: the pressure dividing cylinder (14) is provided with a cylinder oil inlet hole (141) and a cylinder oil outlet hole (142), and the upper end and the lower end of the pressure dividing cylinder (14) are sleeved with a cylinder upper sealing ring (145) and a cylinder lower sealing ring (146).
6. The high-efficiency experimental device for the triaxial experiment of rock mechanics according to claim 1, wherein: the heating device comprises a heating jacket clamp (10) and a control device, the heating jacket clamp (10) is clamped outside a sleeve (12), and a temperature probe is arranged inside the sleeve (12) and connected with the temperature control device (6).
7. The high-efficiency experimental device for triaxial experiments in rock mechanics according to claim 5, wherein: the upper sealing ring (113), the lower sealing ring (132), the upper cylinder separating sealing ring (145) and the lower cylinder separating sealing ring (146) are all made of perfluoro ether rubber materials.
8. The high-efficiency experimental device for the triaxial experiment of rock mechanics according to claim 1, wherein: and a pressurizing system of the axial force loading device (7) adopts hydraulic pressurization.
9. The high-efficiency experimental device for the triaxial experiment of rock mechanics according to claim 1, wherein: the hydraulic oil pump control system is characterized by further comprising a hydraulic oil pump control panel (1), a temperature loading control panel (2) and a hydraulic control system panel (3), wherein the hydraulic oil pump control panel (1), the temperature loading control panel (2) and the hydraulic control system panel (3) are respectively connected with a computer (4) to form an integrated control panel.
10. The high-efficiency experimental device for the triaxial experiment of rock mechanics according to claim 9, wherein: the hydraulic oil pump control panel (1) is used for controlling hydraulic oil to be injected from the oil inlet hole (133) and controlling hydraulic oil to be injected into the sub-confining pressure cylinder (14) from the sub-cylinder oil inlet hole (141) of the sub-confining pressure cylinder (14).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021788421.2U CN212964408U (en) | 2020-08-25 | 2020-08-25 | A high-efficient experimental apparatus for rock mechanics triaxial experiment |
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| CN202021788421.2U CN212964408U (en) | 2020-08-25 | 2020-08-25 | A high-efficient experimental apparatus for rock mechanics triaxial experiment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112146991A (en) * | 2020-08-25 | 2020-12-29 | 吉林大学 | A high-efficient experimental apparatus for rock mechanics triaxial experiment |
| CN114112664A (en) * | 2021-11-20 | 2022-03-01 | 中国人民解放军国防科技大学 | Constant confining pressure loading experimental device |
-
2020
- 2020-08-25 CN CN202021788421.2U patent/CN212964408U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112146991A (en) * | 2020-08-25 | 2020-12-29 | 吉林大学 | A high-efficient experimental apparatus for rock mechanics triaxial experiment |
| CN114112664A (en) * | 2021-11-20 | 2022-03-01 | 中国人民解放军国防科技大学 | Constant confining pressure loading experimental device |
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