CN212340863U - Soil pressure cell test system - Google Patents
Soil pressure cell test system Download PDFInfo
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- CN212340863U CN212340863U CN202022201786.7U CN202022201786U CN212340863U CN 212340863 U CN212340863 U CN 212340863U CN 202022201786 U CN202022201786 U CN 202022201786U CN 212340863 U CN212340863 U CN 212340863U
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Abstract
The utility model discloses a soil pressure cell test system belongs to soil pressure cell application. Comprises a pressure bearing cylinder which is a hollow cylinder body with two open ends; the top plate is detachably connected to the top of the pressure bearing cylinder; the bottom plate is detachably connected to the bottom of the pressure-bearing cylinder; the sand layer is filled in the hollow space of the pressure-bearing cylinder; a soil pressure cell disposed within the sand layer; the pressure control unit is arranged at the top plate and used for providing pressure for the sand layer; the temperature control unit is arranged beside the pressure-bearing cylinder and used for controlling the temperature in the pressure-bearing cylinder; and the data acquisition unit is arranged beside the pressure-bearing cylinder and is in signal connection with the soil pressure cell to acquire data generated by the soil pressure cell. The utility model discloses can simulate for the soil pressure cell and go out the demarcation environment that is close actual use environment, frozen soil engineering temperature to obtain the demarcation coefficient that is closer actual engineering, improve the test accuracy.
Description
Technical Field
The utility model belongs to soil pressure cell application, more specifically say, relate to a soil pressure cell test system.
Background
The soil pressure cell is suitable for dynamic and static tests of geotechnical engineering such as roadbeds, retaining walls, dam bodies and tunnels, particularly the miniature soil pressure cell has the advantages of high sensitivity, simple structure, small volume and the like, and is more suitable for indoor model tests or model tests with smaller proportion.
In the prior art, a manufacturer calibrates an earth pressure cell by adopting an oil pressure calibration method, because the contact between a stress surface of the earth pressure cell and hydraulic oil and an actually measured medium has a certain difference, a calibration coefficient given by the manufacturer needs to be corrected before the earth pressure cell is used, otherwise, the accuracy of a measurement result is greatly influenced, and aiming at frozen earth engineering, the earth pressure cell works in a negative temperature environment, particularly a resistance strain type earth pressure cell, the resistance value of a built-in strain gauge element of the earth pressure cell has a great correlation with the temperature, so that the earth pressure cell needs to be corrected more, and the test precision of the earth pressure cell is improved.
Through retrieval, the Chinese patent publication number: CN 101463598B; the publication date is as follows: 24 months 06 months 2009; the in-situ calibration device and method for the soil pressure box are disclosed, and the structure comprises the following steps: in the circular calibration pit, a reinforced concrete bottom plate, a soil pressure box sleeved with a rubber bag, medium coarse sand, undisturbed soil, a rubber pad, a loading steel plate, a jack and a reaction frame are sequentially arranged and connected from bottom to top; the reaction frame is perpendicular to the ground anchor embedded in the anchoring hole of the circular calibration pit and connected with the ground anchor through a bolt pin. The device of this application has carried out the demarcation to the soil pressure cell, compares in the soil pressure cell of former factory output, and its precision has had very big promotion, but still can't effectively revise to the measuring error that soil pressure cell produced under the negative temperature environment such as frozen soil engineering.
Disclosure of Invention
In order to solve at least one of the above technical problems, according to the utility model discloses an aspect provides a soil pressure cell test system, includes:
the pressure bearing cylinder is a hollow cylinder body with two open ends;
the top plate is detachably connected to the top of the pressure bearing cylinder;
the bottom plate is detachably connected to the bottom of the pressure-bearing cylinder;
the sand layer is filled in the hollow space of the pressure-bearing cylinder;
a soil pressure cell disposed within the sand layer;
the pressure control unit is arranged at the top plate and used for providing pressure for the sand layer;
the temperature control unit is arranged beside the pressure-bearing cylinder and used for controlling the temperature in the pressure-bearing cylinder;
and the data acquisition unit is arranged beside the pressure-bearing cylinder and is in signal connection with the soil pressure cell to acquire data generated by the soil pressure cell.
According to the soil pressure cell test system provided by the embodiment of the utility model, optionally, a plurality of soil pressure cells are arranged in the sand layer;
the side wall of the pressure-bearing cylinder is provided with a side hole, the soil pressure box is connected with the data acquisition unit through a wire, and the wire extends out of the pressure-bearing cylinder from the side hole.
According to the soil pressure cell test system of the embodiment of the utility model, optionally, the pressure control unit is a hydraulic unit, and the pressure is applied to the sand layer in the pressure-bearing cylinder through the top plate;
the sand-isolating pressure-bearing cylinder is characterized by further comprising a base plate, wherein the base plate is arranged in the upper end portion of the pressure-bearing cylinder, a sand layer is isolated, and a pressurizing cavity is formed between the top plate and the base plate.
According to the utility model discloses soil pressure cell test system, optionally, the temperature control unit includes cooling line one, and it twines in the outer lateral wall of pressure-bearing section of thick bamboo, lets in the coolant liquid in the cooling line one.
According to the soil pressure cell test system of the embodiment of the utility model, optionally, the soil pressure cell test system further comprises an auxiliary plate which is arranged in the lower end part of the pressure bearing cylinder and is detachably connected with the bottom plate, and a pipeline mounting groove is formed on the end surface of the auxiliary plate close to the bottom plate in a concave manner;
the temperature control unit also comprises a second cooling pipeline which penetrates through the bottom plate and is arranged in the pipeline mounting groove, and cooling liquid is introduced into the second cooling pipeline.
According to the utility model discloses soil pressure cell test system, optionally, the pipeline mounting groove is the heliciform and is formed in attaching the board terminal surface.
According to the soil pressure cell test system provided by the embodiment of the utility model, optionally, a temperature sensor is arranged beside each soil pressure cell and is in signal connection with the data acquisition unit;
the hydraulic pressure meter is arranged at the top plate and used for measuring the hydraulic pressure applied by the pressure control unit, and the hydraulic pressure meter is in signal connection with the data acquisition unit.
According to another aspect of the utility model, a method of use of soil pressure cell test system is provided, the step as follows:
firstly, assembling and checking: assembling a pressure bearing cylinder, a top plate, a bottom plate, a pressure control unit, a temperature control unit, a data acquisition unit and an auxiliary plate, configuring the pressure control unit, the temperature control unit and the data acquisition unit, and performing pressure leakage detection on the pressure control unit and the temperature control unit;
secondly, arranging the soil pressure cell: detaching the top plate and the pressure control unit, filling a sand layer into the pressure-bearing cylinder, simultaneously placing a soil pressure box connected with a temperature sensor, and enabling a lead wire connected with the soil pressure box to extend out of the side hole and be connected with the data acquisition unit;
thirdly, trial collection: assembling a top plate and a pressure control unit, well preserving heat of a cooling pipeline I, a cooling pipeline II, a pressure bearing cylinder, the top plate and a bottom plate, and performing trial acquisition by a data acquisition unit;
fourthly, environment simulation: opening the temperature control unit, circulating and introducing cooling liquid into the cooling pipeline I and the cooling pipeline II, cooling the sand layer, opening the pressure control unit after cooling for a period of time, and pressurizing the sand layer in a grading manner;
fifthly, data acquisition: setting a data acquisition unit, automatically acquiring data, unloading the pressure of the pressure control unit after calibration is finished, stopping refrigerating fluid circulation of the temperature control unit, stopping data acquisition, and processing and analyzing the data acquired by the data acquisition unit to obtain a calibration coefficient and a calibration curve.
According to the utility model discloses soil pressure cell test system's application method, optionally, arrange a plurality of layers of soil pressure cell in the sand bed, every layer is arranged a plurality of soil pressure cell along pressure-bearing cylinder diameter direction.
According to the use method of the soil pressure cell test system provided by the embodiment of the utility model, optionally, the thickness of the sand layer above and below the soil pressure cell is more than one time of the thickness of the soil pressure cell; the thickness of the sand layer at the side of the soil pressure cell is more than one time of the diameter of the soil pressure cell.
Advantageous effects
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the soil pressure cell test system of the utility model can simulate a calibration environment which is closer to the actual use environment and the frozen soil engineering temperature for the soil pressure cell, thereby obtaining a calibration coefficient which is closer to the actual engineering and improving the test accuracy;
(2) the soil pressure cell test system of the utility model can calibrate a plurality of soil pressure cells simultaneously, thereby greatly improving the test efficiency;
(3) the soil pressure cell test system of the utility model can evenly and stably pressurize the sand layer through the pressure control unit, and simulate the environment close to the actual soil pressure cell use pressure;
(4) the soil pressure cell test system of the utility model, the cooling pipeline I wound on the outer side wall of the pressure-bearing cylinder is surrounded, when the temperature control unit is started, the sand layer in the pressure-bearing cylinder can be uniformly cooled from the side wall, so that the temperature of the soil pressure cell at each position in the sand layer tends to be uniform and stable, and the test accuracy is further ensured;
(5) the soil pressure cell test system of the utility model is provided with the auxiliary plate structure, and is provided with the cooling pipeline II in a matching way, so that the temperature of the sand layer can be rapidly and uniformly controlled in a set range together with the cooling pipeline I;
(6) the soil pressure cell test system of the utility model has the mounting groove which is spirally arranged, the cooling pipeline II is spirally arranged on the auxiliary plate, when the negative temperature is simulated, the cooling pipeline I which is wound on the side wall of the pressure bearing cylinder is matched, the temperature environment at each soil pressure cell in the sand layer can be ensured to be uniform, and the accuracy can be ensured when a plurality of soil pressure cells are simultaneously calibrated;
(7) the utility model discloses a soil pressure cell test system, data acquisition unit can also gather the temperature data of every soil pressure cell department except can gathering the data of soil pressure cell transmission to and pressure control unit's pressure data, finally handle the analysis to these data, reachs calibration coefficient and calibration curve, and the test result accuracy is high.
Drawings
In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the drawings of the embodiments will be briefly described below, and it is obvious that the drawings in the following description only relate to some embodiments of the present invention, and are not intended to limit the present invention.
FIG. 1 shows a schematic structural diagram of a soil pressure cell testing system of the present invention;
figure 2 shows a cross-sectional view of the pressure-containing cylinder of the present invention;
figure 3 shows a top view of the top plate of the present invention;
FIG. 4 is a sectional view taken along line A-A of FIG. 3;
figure 5 shows a top view of the bottom plate of the present invention;
FIG. 6 is a sectional view taken along line B-B of FIG. 5;
figure 7 shows a top view of the appendage panel of the present invention;
FIG. 8 is a cross-sectional view taken along line C-C of FIG. 7;
reference numerals:
1. a pressure-bearing cylinder; 10. a side hole; 11. sealing the plug;
2. a top plate; 20. mounting holes;
3. a base plate; 30. a first pipeline port; 31. a second pipeline port;
4. a sand layer;
5. a soil pressure cell; 50. a temperature sensor;
6. a pressure control unit; 60. a valve; 61. a base plate;
7. a temperature control unit; 70. a first cooling pipeline; 71. a second cooling pipeline;
8. a data acquisition unit; 80. a hydraulic gauge;
9. attaching a plate; 90. and (4) installing a pipeline in a groove.
Detailed Description
In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.
Example 1
The soil pressure cell test system of this embodiment includes:
the pressure bearing cylinder 1 is a hollow cylinder body with two open ends;
the top plate 2 is detachably connected to the top of the pressure bearing cylinder 1;
the bottom plate 3 is detachably connected to the bottom of the pressure bearing cylinder 1;
a sand layer 4 formed in the hollow space of the pressure-bearing cylinder 1 by filling;
a soil pressure cell 5 disposed within the sand layer 4;
a pressure control unit 6 provided at the top plate 2 to supply pressure to the sand layer 4;
the temperature control unit 7 is arranged beside the pressure bearing cylinder 1 and used for controlling the temperature in the pressure bearing cylinder 1;
and the data acquisition unit 8 is arranged beside the pressure bearing cylinder 1 and is in signal connection with the soil pressure cell 5 to acquire data generated by the soil pressure cell 5.
The soil pressure cell test system structure of this embodiment is as shown in fig. 1, and a pressure-bearing cylinder 1, a top plate 2 and a bottom plate 3 are the steel construction, and top plate 2 and pressure-bearing cylinder 1, bottom plate 3 and pressure-bearing cylinder 1 all can dismantle through high strength bolt and be connected, and the high strength bolt intensity in this embodiment is more than 8.8 grades, and pressure-bearing cylinder 1, top plate 2 and bottom plate 3 structure after the connection can bear the pressure more than 10 MPa.
The sand layer 4 of this embodiment constitutes for dry sand, soil pressure cell 5 wraps up in dry sand and is closer rather than actual service environment, help more accurate demarcation soil pressure cell 5, this embodiment pressurizes to sand layer 4 through pressure control unit 6 and marks, bear the temperature of pressing a section of thick bamboo 1 department through temperature control unit 7 control, and then can simulate out the operational environment temperature that soil pressure cell 5 located in the frozen soil engineering, can collect soil pressure cell 5's data through data acquisition unit 8, in order to obtain the calibration coefficient that is closer to the engineering reality, thereby revise the calibration curve that the producer provided, improve the test accuracy.
Example 2
The soil pressure cell test system of the embodiment is further improved on the basis of the embodiment 1, and a plurality of soil pressure cells 5 are arranged in the sand layer 4;
a side hole 10 is formed in the side wall of the pressure bearing cylinder 1, the soil pressure cell 5 is connected with the data acquisition unit 8 through a lead, and the lead extends out of the pressure bearing cylinder 1 from the side hole 10.
As shown in fig. 1, the soil pressure cell test system of the embodiment can calibrate a plurality of soil pressure cells 5 at the same time, thereby greatly improving the test efficiency; through the side hole 10, the signal connection between the soil pressure cell 5 and the data acquisition unit 8 is facilitated.
The utility model discloses a side opening 10 is equipped with a plurality of, as shown in fig. 2, and the symmetrical formula is seted up in a pressure-bearing section of thick bamboo 1 both sides, and the wire of connecting soil pressure cell 5 stretches out from side opening 10 nearby, to the side opening 10 that does not use, through sealed end cap 11 shutoff, through side opening 10, still can conveniently to annotate operations such as liquid in the pressure-bearing section of thick bamboo 1 to in order to simulate multiple environmental condition, improve the application scope of this embodiment system.
Example 3
The soil pressure cell test system of the embodiment is further improved on the basis of the embodiment 2, wherein the pressure control unit 6 is a hydraulic unit and applies pressure to the sand layer 4 in the pressure-bearing cylinder 1 through the top plate 2;
the sand-resistant pressure-bearing cylinder further comprises a backing plate 61 which is arranged in the upper end part of the pressure-bearing cylinder 1, and a pressure cavity is formed between the top plate 2 and the backing plate 61 and the sand-resistant layer 4.
The pressure control unit 6 of this embodiment is a hydraulic unit, set up a plurality of mounting holes 20 on roof 2, as shown in fig. 3 and fig. 4, the pressure control unit 6's the pressurization pipeline of the same way passes mounting hole 20, the oil return pipeline of the same way passes another mounting hole 20, and set up backing plate 61 in the bearing section of thick bamboo 1 upper end below roof 2, backing plate 61 level sets up and the shape and the cross sectional shape phase-match of the bearing section of thick bamboo 1 inner wall, form the pressurization cavity of isolated sand layer 4 between roof 2 and backing plate 61, through the oiling in the pressure control unit 6 cavity of pressurizing this, thereby evenly pressurize sand layer 4, simulate out the soil pressure box 5 service pressure environment that is close to reality, further improve the test accuracy.
Example 4
The soil pressure cell testing system of this embodiment is further improved on the basis of embodiment 3, and the temperature control unit 7 includes a first cooling pipeline 70 wound around the outer sidewall of the pressure-bearing cylinder 1, and a cooling liquid is introduced into the first cooling pipeline 70.
As shown in figure 1, the first cooling pipeline 70 wound on the outer side wall of the pressure-bearing cylinder 1 in a surrounding mode can uniformly cool the sand layer 4 in the pressure-bearing cylinder 1 from the side wall when the temperature control unit 7 is started, so that the temperature of the soil pressure box 5 at each position in the sand layer 4 tends to be uniform and stable, and the test accuracy is further ensured.
Example 5
The soil pressure cell test system of the embodiment is further improved on the basis of the embodiment 4, and further comprises an auxiliary plate 9, wherein the auxiliary plate 9 is arranged in the lower end part of the pressure bearing cylinder 1 and is detachably connected with the bottom plate 3, and a pipeline installation groove 90 is formed in the end surface, close to the bottom plate 3, of the auxiliary plate 9 in a recessed manner;
the temperature control unit 7 further comprises a second cooling pipeline 71, the second cooling pipeline passes through the bottom plate 3 and is arranged in the pipeline mounting groove 90, and cooling liquid is introduced into the second cooling pipeline 71.
The structure of the auxiliary plate 9 is as shown in fig. 7 and 8, the auxiliary plate 9 is detachably connected with the bottom plate 3 through a high-strength bolt, the connected auxiliary plate 9 is arranged at the bottom of the sand layer 4 after being assembled, a cooling pipeline II 71 is installed in the auxiliary plate 9, and after the temperature control unit 7 is started, the cooling pipeline II 71 is matched with the cooling pipeline I70 to control the temperature of the sand layer 4 in a set range more quickly and uniformly.
Further, as shown in fig. 5 and 6, the bottom plate 3 is provided with a first duct opening 30 and a second duct opening 31, which facilitate the extension and extension of the second cooling duct 71.
Example 6
The soil pressure cell testing system of the present embodiment is further improved on the basis of embodiment 5, and the pipeline installation groove 90 is spirally formed on the end surface of the attachment plate 9.
As shown in fig. 7, the mounting groove 90 is spirally disposed on the auxiliary plate 9 in cooperation with the cooling pipeline two 71, and when negative temperature is simulated, the cooling pipeline one 70 wound around the side wall of the pressure bearing cylinder 1 is matched to ensure uniform temperature environment of each soil pressure cell 5 in the sand layer 4, and accuracy can be ensured when a plurality of soil pressure cells 5 are calibrated simultaneously.
Example 7
The soil pressure cell test system of the embodiment is further improved on the basis of the embodiment 6, and a temperature sensor 50 is arranged beside each soil pressure cell 5 and is in signal connection with the data acquisition unit 8;
the device also comprises a hydraulic gauge 80 which is arranged at the top plate 2 and used for measuring the hydraulic pressure applied by the pressure control unit 6, wherein the hydraulic gauge 80 is in signal connection with the data acquisition unit 8.
The data acquisition unit 8 of this embodiment can acquire the data transmitted by the soil pressure cell 5, and also can acquire the temperature data of each soil pressure cell 5 and the pressure data of the pressure control unit 6, and finally, these data are processed and analyzed to obtain the calibration coefficient and the calibration curve, and the accuracy of the test result is high.
Example 8
The use method of the soil pressure cell test system of the embodiment comprises the following steps:
firstly, assembling and checking: assembling a pressure bearing cylinder 1, a top plate 2, a bottom plate 3, a pressure control unit 6, a temperature control unit 7, a data acquisition unit 8 and an auxiliary plate 9, configuring the pressure control unit 6, the temperature control unit 7 and the data acquisition unit 8, and performing pressure leakage detection on the pressure control unit 6 and the temperature control unit 7;
secondly, arranging the soil pressure cell: the top plate 2 and the pressure control unit 6 are disassembled, the pressure bearing cylinder 1 is filled with a sand layer 4, meanwhile, a soil pressure box 5 connected with a temperature sensor 50 is arranged, and a lead connected with the soil pressure box 5 extends out of the side hole 10 and is connected with the data acquisition unit 8;
thirdly, trial collection: assembling the top plate 2 and the pressure control unit 6, well preserving heat of the cooling pipeline I70, the cooling pipeline II 71, the pressure bearing cylinder 1, the top plate 2 and the bottom plate 3, and performing trial acquisition by the data acquisition unit 8;
fourthly, environment simulation: opening the temperature control unit 7, circulating and introducing cooling liquid into the first cooling pipeline 70 and the second cooling pipeline 71, cooling the sand layer 4, opening the pressure control unit 6 after cooling for a period of time, and pressurizing the sand layer 4 in a grading manner;
fifthly, data acquisition: setting a data acquisition unit 8, automatically acquiring data, unloading the pressure of the pressure control unit 6 after calibration is finished, stopping refrigerating fluid circulation of the temperature control unit 7, stopping data acquisition, and processing and analyzing the data acquired by the data acquisition unit 8 to obtain a calibration coefficient and a calibration curve.
After other components except the sand layer 4 and the soil pressure box 5 in the soil pressure box test system are assembled, a proper temperature control unit 7, a proper pressure control unit 6 and a proper data acquisition unit 8 are configured, then, a first cooling pipeline 70 and a second cooling pipeline 71 are subjected to pressurizing and leak detection, a pressurizing cavity between the top plate 2 and the base plate 61 is subjected to pressurizing and leak detection, and the assembly of the soil pressure box 5 and the sand layer 4 can be carried out after the pressurizing and leak detection are free.
Further, in this embodiment, the range of the soil pressure cell 5 is between 5 to 15MPa, the time of trial collection in step three is stopped after the collected data is basically unchanged, step four is performed, the duration of temperature reduction in step four is the time when the temperature in the pressure-bearing cylinder 1 is basically maintained unchanged, in step five, the pressure control system unit 6 and the data collection unit 8 can be programmed to realize automatic pressurization and automatic collection of data, and when data is processed, the weight of the sand layer 4 and the backing plate 61 needs to be added to the stress of the soil pressure cell 5.
Example 9
The use method of the soil pressure cell test system of the embodiment is further improved on the basis of the embodiment 8, wherein a plurality of layers of soil pressure cells 5 are arranged in the sand layer 4, and a plurality of soil pressure cells 5 are arranged in each layer along the diameter direction of the pressure bearing cylinder 1.
The method of the embodiment arranges a plurality of layers of soil pressure cells 5, can calibrate a plurality of soil pressure cells 5 in one test, and improves the test efficiency.
Example 10
The use method of the soil pressure cell test system of the embodiment is further improved on the basis of the embodiment 9, and the thicknesses of the sand layers 4 above and below the soil pressure cell 5 are both greater than one time of the thickness of the soil pressure cell 5; the thickness of the sand layer 4 at the side of the soil pressure cell 5 is more than one time of the diameter of the soil pressure cell 5.
Through the arrangement mode of this embodiment, can avoid the influence of structures such as section of thick bamboo wall, roof 2, attached board 9 to simulated pressure, medium environment, ensure the accuracy when carrying out the simultaneous calibration of a plurality of soil pressure cell 5.
The examples of the utility model are only right the utility model discloses a preferred embodiment describes, and not right the utility model discloses design and scope are injectd, do not deviate from the utility model discloses under the prerequisite of design idea, the field engineering technical personnel are right the utility model discloses a various deformation and improvement that technical scheme made all should fall into the protection scope of the utility model.
Claims (7)
1. A soil pressure cell testing system, comprising:
the pressure bearing cylinder is a hollow cylinder body with two open ends;
the top plate is detachably connected to the top of the pressure bearing cylinder;
the bottom plate is detachably connected to the bottom of the pressure-bearing cylinder;
the sand layer is filled in the hollow space of the pressure-bearing cylinder;
a soil pressure cell disposed within the sand layer;
the pressure control unit is arranged at the top plate and used for providing pressure for the sand layer;
the temperature control unit is arranged beside the pressure-bearing cylinder and used for controlling the temperature in the pressure-bearing cylinder;
and the data acquisition unit is arranged beside the pressure-bearing cylinder and is in signal connection with the soil pressure cell to acquire data generated by the soil pressure cell.
2. The soil pressure cell testing system of claim 1, wherein:
the soil pressure boxes are provided with a plurality of soil pressure boxes and are arranged in the sand layer;
the side wall of the pressure-bearing cylinder is provided with a side hole, the soil pressure box is connected with the data acquisition unit through a wire, and the wire extends out of the pressure-bearing cylinder from the side hole.
3. The soil pressure cell testing system of claim 2, wherein:
the pressure control unit is a hydraulic unit and applies pressure to the sand layer in the pressure-bearing cylinder through the top plate;
the sand-isolating pressure-bearing cylinder is characterized by further comprising a base plate, wherein the base plate is arranged in the upper end portion of the pressure-bearing cylinder, a sand layer is isolated, and a pressurizing cavity is formed between the top plate and the base plate.
4. The soil pressure cell testing system of claim 3, wherein: the temperature control unit comprises a first cooling pipeline wound on the outer side wall of the pressure-bearing cylinder, and cooling liquid is introduced into the first cooling pipeline.
5. The soil pressure cell testing system of claim 4, wherein:
the auxiliary plate is arranged in the lower end part of the pressure bearing cylinder and is detachably connected with the bottom plate, and a pipeline mounting groove is formed in the end face, close to the bottom plate, of the auxiliary plate in a recessed mode;
the temperature control unit also comprises a second cooling pipeline which penetrates through the bottom plate and is arranged in the pipeline mounting groove, and cooling liquid is introduced into the second cooling pipeline.
6. The soil pressure cell testing system of claim 5, wherein: the pipeline mounting groove is formed on the end face of the auxiliary plate in a spiral shape.
7. The soil pressure cell testing system of claim 6, wherein:
a temperature sensor is arranged beside each soil pressure cell and is in signal connection with the data acquisition unit;
the hydraulic pressure meter is arranged at the top plate and used for measuring the hydraulic pressure applied by the pressure control unit, and the hydraulic pressure meter is in signal connection with the data acquisition unit.
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| CN202022201786.7U CN212340863U (en) | 2020-09-30 | 2020-09-30 | Soil pressure cell test system |
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| CN202022201786.7U CN212340863U (en) | 2020-09-30 | 2020-09-30 | Soil pressure cell test system |
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