Intelligent follow-up support device for super-large sample cylinder and use method thereof

Abstract

The application provides a super-large sample cylinder intelligent follow-up support device and a use method thereof, which comprises a sample cylinder that can slide in and out of a chamber, a base arranged at the bottom of the sample cylinder, a pressurizing plate arranged at the top of the sample cylinder, and the sample cylinder can slide relative to the base and the pressurizing plate; the chamber is provided with hydraulic servo stabilizing devices on both sides, the hydraulic servo stabilizing devices comprise guide columns and first hydraulic cylinders, connecting ears are fixedly arranged on both sides of the sample cylinder, the connecting ears are connected with the guide columns through sliding sleeves, and the piston rods in the first hydraulic cylinders are fixedly connected with the connecting ears. According to the test pressure data change of soil mechanics test, the intelligent control system is input in real time, the intelligent system controls the hydraulic servo stabilizing devices to output corresponding support forces, actively balances the downward force of the sample cylinder, keeps the sample cylinder stable and displaces along with the sample deformation, can actively realize stable support on the sample cylinder, guarantees the test safety, and can also make the sample cylinder and the sample settlement deformation freely follow up, reduce or eliminate the influence of the support on the test.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of testing or analyzing materials by means of determining the chemical or physical properties of the materials, and in particular to an intelligent follow-up support device for a super-large sample cylinder and a method of using the same. BACKGROUND

[0002] The super-large large-grained coarse-grained soil compression tester refers to a soil mechanics test for determining the relationship between deformation and pressure and the relationship between deformation and time of a soil body under loading conditions under the conditions of lateral confinement and dynamic axial pressure. The super-large soil mechanics test equipment requires that the sample cylinder be designed to be of an abnormally large size, and the self-weight of the sample cylinder is very large. Meanwhile, the particle size of the soil sample used for the test and the overall size of the sample are very large. Therefore, the friction between the sample cylinder and the sample and the stability of the sample cylinder have a non-negligible impact on the test results and test safety.

[0003] The friction between the sample and the sample cylinder of the test equipment during the test inevitably affects the stress state of the sample and the test results. In order to reduce the impact and ensure the test accuracy, the sample cylinder is separated from the support base of the test equipment, so that the sample cylinder is in a "hovering" state, causing the sample to be compressed in two directions synchronously. More importantly, the friction between the sample and the inner wall of the sample cylinder changes from one-way to relative two-way, and the uniformity of the stress of the sample is improved, and the impact of the constraint of the sample cylinder on the effective stress of the sample is halved.

[0004] For the super-large large-grained coarse-grained soil compression tester, the diameter of the test cylinder is not less than 3m, and the test pressure reaches 40000kN. Due to the large scale of the test device and the high requirement for the maximum test pressure, the structure size and weight of the sample cylinder are abnormally large. Referring to the chamber counter-pressure type super-large compression test device of "CN118937103A", the friction between the sample cylinder and the sample is not enough to support the self-weight of the sample cylinder when the sample cylinder is in a hovering state during the test, causing the sample cylinder and the large-grained sample to slide, thereby causing the stability of the sample cylinder and the large-grained sample to have a non-negligible impact on the test results and test safety. At the same time, the friction between the test cylinder in a hovering state and the test material during the test also affects the test accuracy.

[0005] In order to ensure the smooth development of the super-large large-grained coarse-grained soil compression test, reduce the impact of the friction between the sample and the cylinder wall on the test safety and test data accuracy, and control the sample cylinder from sliding due to its own weight, the sample cylinder needs to displace accordingly when the soil mechanics sample produces settlement deformation under the action of the test pressure N, that is, the sample cylinder and the sample deform follow-up, improve the safety of the test operation process, and reduce the impact of the friction of the sample cylinder on the test results. Therefore, it is necessary to study and improve the test equipment and add a device that can actively provide follow-up and stable support for the test cylinder according to the change of the test load and the test deformation, so as to ensure the test safety and reduce the impact of the friction. SUMMARY

[0006] The main purpose of the present application is to provide a super large sample cylinder intelligent follow-up support device and its using method, which solves the problems in the above background technology.

[0007] To solve the above technical problems, the technical solution adopted by the present application is: a sample cylinder which can slide in and out of a chamber, a base is arranged at the bottom of the sample cylinder, and a pressurizing plate is arranged at the top of the sample cylinder, the sample cylinder can slide relative to the base and the pressurizing plate;

[0008] Hydraulic servo stabilizing devices are arranged on both sides of the chamber, the hydraulic servo stabilizing devices comprise guide columns and first hydraulic cylinders, connecting ears are fixedly arranged on both sides of the sample cylinder, the connecting ears are connected with the guide columns through sliding sleeves, and the end portions of the piston rods in the first hydraulic cylinders are fixedly connected with the connecting ears.

[0009] Preferably, two rows of first tracks and second tracks are arranged on the ground inside and outside the chamber, and a base bearing platform is arranged between the second tracks inside the chamber.

[0010] The base is moved by abutting against the first tracks and the second tracks through a plurality of rollers at the bottom of the base.

[0011] Third hydraulic cylinders are arranged on both sides of the bottom of the second tracks, the third hydraulic cylinders are used for driving the second tracks to ascend and descend, the first tracks and the second tracks are flush when ascending, and the base is abutted against the base bearing platform when descending.

[0012] Preferably, winches are arranged inside and outside the chamber, and towing hooks are fixedly arranged at both ends of the base, the winches can drive the base to drive the sample cylinder to enter and exit the chamber by being hung on the towing hooks through cables.

[0013] Preferably, a plurality of second hydraulic cylinders are arranged on the top of the chamber, the end portions of the piston rods of the second hydraulic cylinders are fixedly provided with self-adapting pressurizing heads, force transmission columns corresponding to the second hydraulic cylinders are fixedly arranged on the pressurizing plate, and the second hydraulic cylinders are used for driving the self-adapting pressurizing heads to act on the force transmission columns to apply loads to the force transmission columns.

[0014] Preferably, the guide columns are arranged on both sides of the first hydraulic cylinders, the bottom portions of the guide columns are fixed on the ground of the chamber, the top portions of the two guide columns are fixed through connecting rods, and the connecting rods are fixedly connected with the side walls of the chamber through connecting columns at both ends of the connecting rods.

[0015] Preferably, a through slot is arranged on the connecting ear, when the sample cylinder slides into the chamber, the guide columns enter the through slot, the end portions of the sliding sleeves on the guide columns are fixedly connected with the connecting ear through bolts, and lock blocks are fixedly arranged at the end portions of the through slot and used for limiting and locking the two guide columns.

[0016] Preferably, the piston rod end of the second hydraulic cylinder is provided with a ball head, and one end of the pressure seat in the adaptive pressure head is provided with a concave surface corresponding to the arc surface of the ball head. The ball head abuts against the inside of the pressure seat, and the outside of the pressure seat is connected to the piston rod through multiple connectors. The inside of the connector is a through groove, and the two ends of the through groove are connected to the pressure seat and the piston rod respectively by bolts.

[0017] Preferably, the base is provided with a boss, the sample tube is sleeved on the boss, a rolling device is provided between the middle of the boss and the sample tube, and a sealing ring is fixed on the outer side of the top of the boss, with the outer side of the sealing ring abutting against the inner wall of the sample tube.

[0018] A method for using an intelligent follow-up support device for an ultra-large sample cylinder, the method being:

[0019] S1. After filling the sample into the sample cylinder outside the cave, the pressure plate is hoisted into the sample cylinder and pulled into the cave by a winch.

[0020] S2. When the sample tube moves into the cavity, the through grooves on the connecting ears on both sides are engaged with the guide post. After it moves into place, the sliding sleeve on the guide post is fixed to the connecting ear by bolts, and a locking block is locked at the opening of the through groove end.

[0021] S3. Drive the third hydraulic cylinder to slowly lower the second track and the whole structure so that the base lands on the base platform. Then drive the piston rod of the first hydraulic cylinder to extend and connect and fix its end to the connecting lug with bolts to complete the preparation before the test.

[0022] S3. During the test, a load N is applied to the pressure plate via the second hydraulic cylinder. X Simultaneously, the data transmission system transmits the loading parameters to the intelligent control system, and the frictional force F between the sample cylinder and the sample is... X For N X The function of the sample cylinder, and the supporting force P of the sample cylinder. x =f(F x ), thus determining P X The first hydraulic cylinder in the hydraulic servo stabilizing device stabilizes and supports the sample cylinder, and makes the sample cylinder "follow" the deformation of the sample. No new friction force is generated between the sample cylinder and the sample, so as to minimize the disturbance of the sample cylinder to the sample, and ensure that the test process is smooth, safe and reliable.

[0023] Preferably, the load N applied to the pressure plate by the second hydraulic cylinder during the test is... X The supporting force T of the base platform X Under the influence of the force, the sample inside the sample cylinder will undergo relative compression, resulting in relative displacement between the sample and the sample cylinder wall, forming opposing frictional forces F. 上x F 下x F 上x F 下x For NX The function;

[0024] F 上x F 下x The resultant force F x = F 上x- F 下x The weight of the sample cylinder is G0, P x =G0- F x F x For N X The function, therefore, P x For N X The function is used to establish the test load N. X and the supporting force P provided for the sample cylinder x In this relationship, the first hydraulic cylinder actively provides the supporting force P required to balance and stabilize the sample cylinder. x ;

[0025] To ensure that the specimen inside the suspended specimen cylinder deforms synchronously and uniformly in both directions under pressure, the relative displacement between the specimen and the cylinder wall generates opposing frictional forces F. 上x F 下x The balance of the suspension of the specimen cylinder reduces the effect on the effective stress of the specimen by a factor of two.

[0026] This invention provides an intelligent follow-up support device for ultra-large specimen cylinders and its usage method. Based on the changes in test pressure data applied in soil mechanics tests, the data is input into the intelligent control system in real time and accurately. The intelligent system responds in real time by controlling the hydraulic servo stabilizing device to output the corresponding support force, actively balancing the downward force of the specimen cylinder, maintaining the stability of the specimen cylinder and displacing it with the deformation of the specimen. This not only actively achieves stable support for the specimen cylinder and ensures test safety, but also allows the specimen cylinder and specimen settlement deformation to move freely, reducing or eliminating the influence of the support on the test, realizing high-efficiency, high-quality, and high-safety "hovering" of the heavy-duty compression tester specimen cylinder. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0028] Figure 1 This is a top view of the overall structure of the invention;

[0029] Figure 2 This is the present invention. Figure 1 Diagram showing the intermediate sample tube located outside the cavity;

[0030] Figure 3 This is the present invention. Figure 1 Sectional view of AA;

[0031] Figure 4 This is the present invention. Figure 1 BB section view;

[0032] Figure 5 is the application Figure 3 a partial enlarged view a in the application;

[0033] Figure 6 is the application Figure 3 a partial enlarged view b in the application;

[0034] Figure 7 is a schematic diagram of the application under test force;

[0035] In the figure: base 1; boss 101; sealing ring 102; rolling device 103; sample cylinder 2; pressing plate 3; force transmission column 301; first track 4; hydraulic servo stabilizing device 5; connecting lug 6; lock block 7; through slot 8; second track 9; connecting column 10; first hydraulic cylinder 11; self-adapting pressing head 12; second hydraulic cylinder 13; roller 14; third hydraulic cylinder 15; guide column 16; sliding sleeve 17; base platform 18; chamber 19; ball head 20; pressing seat 21; connecting piece 22; bolt 23; intelligent control system 24. DETAILED DESCRIPTION

[0036] Example 1

[0037] As shown in Figures 1-6 , an intelligent follow-up support device for a super-large sample cylinder includes a sample cylinder 2 that can slide in and out of a chamber 19, the sample cylinder 2 is provided with a base 1 at the bottom, and a pressing plate 3 at the top, and the sample cylinder 2 can slide relative to the base 1 and the pressing plate 3.

[0038] The chamber 19 is provided with a hydraulic servo stabilizing device 5 on both sides, the hydraulic servo stabilizing device 5 includes a guide column 16 and a first hydraulic cylinder 11, the sample cylinder 2 is fixedly provided with a connecting lug 6 on both sides, the connecting lug 6 is connected with the guide column 16 through a sliding sleeve 17, and the end of the piston rod in the first hydraulic cylinder 11 is fixedly connected with the connecting lug 6.

[0039] In this example, the sample cylinder diameter of the super-large large-diameter coarse-grained soil compression tester is not less than 3m, and the test pressure reaches 40000kN. Due to the large scale of the test device, the requirement of the maximum test pressure is high, and the structure size and weight of the sample cylinder are super-normal, so the chamber 19 is constructed, and the inner wall of the chamber 19 is used as support to ensure that the required test pressure can be met. As shown in Figures 1-2 , the sample cylinder 2 is abutted against the base 1, and after filling and testing outside the chamber 19, it is pushed into the chamber 19, the second hydraulic cylinder 13 at the top of the chamber 19 is used to load the pressing plate 3, at the same time, the connecting lug 6 on both sides of the hydraulic servo stabilizing device 5 and the sample cylinder 2 are connected, and the first hydraulic cylinder 11 can drive the sample cylinder 2 to move following the loading process, thereby reducing the influence of the friction between the sample and the sample cylinder 2 on the test.

[0040] Preferably, the ground inside and outside the cave 19 is paved with two connected first tracks 4 and second tracks 9, and a base platform 18 is provided between the second tracks 9 inside the cave 19; the bottom of the base 1 moves against the first tracks 4 and second tracks 9 through multiple rollers 14.

[0041] In the test area of ​​cavern 19, there is a protruding base platform 18. There are two lifting second tracks 9 on both sides of the base platform 18. When the base 1 moves into the cavern 19 through the roller 14, the second track 9 is driven to descend by the third hydraulic cylinder 15 at the bottom of the second track 9 so that the base 1 abuts against the base platform 18.

[0042] Winches are installed both inside and outside the cavern 19. The base 1 is fixed with hooks at both ends. The winches can drive the base 1 to move the sample cylinder 2 in and out of the cavern 19 by hanging the hooks with cables.

[0043] Preferably, a plurality of second hydraulic cylinders 13 are fixedly installed on the top of the cavern 19. An adaptive pressure head 12 is fixedly installed at the end of the piston rod of the second hydraulic cylinder 13. A force transmission column 301 corresponding to the second hydraulic cylinder 13 is fixedly installed on the pressure plate 3. The second hydraulic cylinder 13 is used to drive the adaptive pressure head 12 to act on the force transmission column 301 to apply a load to it.

[0044] The sample is filled into the sample tube 2, and a pressure plate 3 is installed on its top. After entering the cavity 19, the force transmission column 301 on the pressure plate 3 corresponds one-to-one with the multiple second hydraulic cylinders 13 on the top of the cavity 19. Driving the second hydraulic cylinders 13 loads the sample through the force transmission column 301 and the pressure plate 3. The adaptive pressure head 12 between the second hydraulic cylinder 13 and the force transmission column 301 can ensure that the load is vertical.

[0045] like Figure 5 As shown, the adaptive pressure head 12 includes a ball head 20 at the piston rod end of the second hydraulic cylinder 13. The ball head 20 abuts against a corresponding concave surface at one end of the pressure seat 21. The outer side of the pressure seat 21 is connected to the piston rod via multiple connectors 22. The connectors 22 have through grooves inside, and the two ends of the through grooves are connected to the pressure seat 21 and the piston rod respectively by bolts 23. When the second hydraulic cylinder 13 drives the piston rod to move, the pressure seat 21 abuts against the end face of the force transmission column 301, and the cooperation between the ball head 20 and the concave surface ensures that the applied load is perpendicular.

[0046] Preferably, the guide columns 16 are located on both sides of the first hydraulic cylinder 11. The bottom of the guide columns 16 is fixed on the ground of the cavern 19, and the tops of the two guide columns 16 are fixed together by a connecting rod. The two ends of the connecting rod are fixedly connected to the side wall of the cavern 19 by a connecting column 10.

[0047] The connecting lug 6 is provided with a through slot 8, when the sample cylinder 2 slides into the cavity 19, the guide post 16 enters the through slot 8, and the end of the sliding sleeve 17 on the guide post 16 is fixedly connected with the connecting lug 6 by a bolt, and the end of the through slot 8 is provided with a locking block 7 for limiting and locking the two guide posts 16.

[0048] When the sample cylinder 2 moves into the cavity 19, the guide post 16 enters the through slot 8 on the connecting lug 6, and is fixedly connected with the connecting lug 6 by the sliding sleeve 17 on the guide post 16, so that the up and down sliding of the sample cylinder 2 is smooth, and after the sliding sleeve 17 is fixed in place, the locking block 7 is installed at the end of the through slot 8, thereby limiting and locking the two guide posts 16.

[0049] Preferably, the base 1 is provided with a boss 101, the sample cylinder 2 is sleeved on the boss 101, a rolling device 103 is arranged between the middle part of the boss 101 and the sample cylinder 2, and a sealing ring 102 is fixedly arranged on the top outer side of the boss 101 and abuts against the inner wall of the sample cylinder 2.

[0050] When the sample cylinder 2 is filled, the sample cylinder 2 is raised by the cushion block, and after the first hydraulic cylinder 11 and the connecting lug 6 are stably supported, the cushion block is removed, so that the sample cylinder 2 is suspended and can be moved under the drive of the first hydraulic cylinder 11. Figure 6 The rolling device 103 is a ball, a ball holder provided with a plurality of balls, a roller, or a roller holder provided with a plurality of rollers, which can ensure smooth relative sliding between the sample cylinder 2 and the boss 101.

[0051] Example 2

[0052] As shown in Figures 1-7 , further illustrated in combination with Example 1, when the weight G of the sample cylinder 2 is less than the static friction force F 静 between the sample and the test cylinder 2, the sample cylinder will not slide relatively; when the weight G of the sample cylinder 2 is greater than the static friction force F 静 between the sample and the test cylinder 2, the sample cylinder 2 will slide downward, and a support force P x needs to be provided, and the relationship between the support force P x and the friction force F x between the sample cylinder 2 and the sample is: P x = G0- F x . In order to ensure the stability of the sample cylinder in the hovering state, the minimum support force to be applied is P 小 = G0- F 静x .

[0053] Taking the sample as the research object: under the action of the load N X and the support force T X provided by the pile cap, the sample will produce relative compression and relative displacement between the sample and the cylinder wall to form a friction force F上x F 下x F 上x F 下x For N X The function F. 上x F 下x The resultant force F x = F 上x -F 下x ;and P x = G0- F x F x For N X The function, therefore, P x For N X The function is . Therefore, the test load N can be established. X and the supporting force P provided for the sample cylinder x In this relationship, the output device actively provides the supporting force required to balance and stabilize the sample cylinder. To ensure that the sample inside the suspended sample cylinder deforms synchronously and uniformly in both directions under pressure, the relative displacement between the sample and the cylinder wall must generate opposing frictional forces F. 上x F 下x The balance.

[0054] Therefore, the equipment applies a test load N. X Simultaneously, the data transmission system transmits the loading parameters to the intelligent control system 24, including the friction force F. X For N X The function of P, and P x =f(F x ), thus determining P X The control support system stabilizes the test cylinder and makes it "follow" the deformation of the sample. No new friction is generated between the sample cylinder and the sample, minimizing the disturbance of the sample cylinder to the sample, ensuring a smooth and safe test process and reliable test results.

[0055] A method for using an intelligent follow-up support device for an ultra-large sample cylinder, the method being:

[0056] S1. After filling the sample into the sample cylinder 2 outside the cavern 19, the pressure plate 3 is hoisted into the sample cylinder 2 and pulled into the cavern 19 by a winch.

[0057] S2. When the sample tube 2 moves into the cavity 19, the through grooves 8 on the connecting ears 6 on both sides are engaged with the guide post 16. After the movement is in place, the sliding sleeve 17 on the guide post 16 is fixed to the connecting ear 6 by bolts, and the locking block 7 is locked at the end opening of the through groove 8.

[0058] S3. Drive the third hydraulic cylinder 15 to drive the second track 9 and the whole to slowly descend so that the base 1 falls on the base platform 18. Then drive the piston rod of the first hydraulic cylinder 11 to extend and connect and fix its end to the connecting lug 6 with bolts to complete the preparation before the test.

[0059] S3. During the test, a load N is applied to the pressure plate 3 via the second hydraulic cylinder 13. X Simultaneously, the data transmission system transmits the loading parameters to the intelligent control system 24, and the frictional force F between the sample cylinder 2 and the sample is... X For N X The function of the sample cylinder 2, and the supporting force P. x =f(F x ), thus determining P X The first hydraulic cylinder 11 in the hydraulic servo stabilizing device 5 stabilizes and supports the sample cylinder 2, and makes the sample cylinder 2 "follow" the deformation of the sample. No new friction force is generated between the sample cylinder 2 and the sample, so that the disturbance of the sample cylinder 2 to the sample is minimized, ensuring that the test process is smooth, safe and reliable.

[0060] like Figure 7 As shown, during the soil mechanics test, the test loading system actively applies a dynamic test load N. X An axial force is applied to the sample through the pressure plate 3, and the base platform 18 generates a reaction force T. X This causes the specimen to undergo bidirectional synchronous compressive deformation. The effect is that axial pressure can be transmitted to the specimen more effectively, significantly improving the accuracy of the compression test and the uniformity of stress on the specimen. More importantly, the frictional force between the specimen and the inner wall of the specimen cylinder 2 changes from a unidirectional frictional force F to a relative bidirectional frictional force. 上x F 下x (for N) X (a function of the frictional force F between the sample and the sample cylinder 2) x = F 上x -F 下x =f(N) X The influence of the sample cylinder 2 on the effective stress of the specimen is reduced by a factor of two, and the influence of the sample cylinder 2 on the test results of the specimen's compressive deformation is significantly reduced, resulting in more accurate test data (axial pressure and displacement). The sample cylinder 2, under frictional force F... x Under the action of its own weight G0, and supported by the force P provided by the first hydraulic cylinder 11 x Support. A dynamic test load N is actively applied to the test loading system. X Simultaneously, the load data is transmitted to the intelligent control system 24 via the data transmission system, according to P x =G0-F x = G0-f(N X The intelligent control system 24 follows the load N XThe change of the dynamic support force P of the first hydraulic cylinder 11 is controlled by the control system x The dynamic support force P of the first hydraulic cylinder 11 is controlled by the change of the dynamic support force P of the first hydraulic cylinder 11 is controlled by the control system x The dynamic support force P of the first hydraulic cylinder 11 is controlled by the change of the dynamic support force P of the first hydraulic cylinder 11 is controlled by the control system

[0061] The above-mentioned embodiments are only preferred technical solutions of the present application, and should not be regarded as a limitation of the present application. The protection scope of the present application should be based on the technical solutions recited in the claims, including equivalent replacement solutions of the technical features recited in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present application.

Claims

1. An intelligent follow-up support device for an ultra-large sample cylinder, characterized in that: The sample tube (2) is slidably inserted into and out of the cavern (19). The sample tube (2) has a base (1) at the bottom and a pressure plate (3) at the top. The sample tube (2) can slide relative to the base (1) and the pressure plate (3). Hydraulic servo stabilizing devices (5) are provided on both sides of the cavern (19). The hydraulic servo stabilizing devices (5) include guide columns (16) and a first hydraulic cylinder (11). Connecting ears (6) are fixed on both sides of the sample tube (2). The connecting ears (6) are connected to the guide columns (16) through the sliding sleeve (17). The piston rod end in the first hydraulic cylinder (11) is fixedly connected to the connecting ears (6). The ground inside and outside the cave (19) is paved with two connected first tracks (4) and second tracks (9), and a base platform (18) is provided between the second tracks (9) inside the cave (19). Multiple second hydraulic cylinders (13) are arranged on the top of the cavern (19). An adaptive pressure head (12) is fixed at the end of the piston rod of the second hydraulic cylinder (13). A force transmission column (301) corresponding to the second hydraulic cylinder (13) is fixed on the pressure plate (3). The second hydraulic cylinder (13) is used to drive the adaptive pressure head (12) to act on the force transmission column (301) to apply a load to it. The weight of the sample tube (2) is G0, and the frictional force between the sample and the sample tube (2) is F. x A load of N is applied to the pressure plate (3) by the second hydraulic cylinder (13). X Axial force is applied to the specimen, and the base platform (18) provides a supporting force of T. X The supporting force of the first hydraulic cylinder (11) is P. x According to P x =G0-F x = G0-f(N X ), with load N X The change controls the output dynamic support force P of the first hydraulic cylinder (11). x The force is balanced with the downward force of the sample tube (2) so that the sample tube (2) moves with the deformation of the sample.

2. The intelligent follow-up support device for an ultra-large sample cylinder according to claim 1, characterized in that: The base (1) moves against the first track (4) and the second track (9) by multiple rollers (14); The second track (9) is provided with a third hydraulic cylinder (15) on both sides of the bottom. The third hydraulic cylinder (15) is used to drive the second track (9) to rise and fall. When rising, the first track (4) and the second track (9) are aligned. When falling, the base (1) is placed against the base support (18).

3. The intelligent follow-up support device for an ultra-large sample cylinder according to claim 2, characterized in that: in Winches are installed both inside and outside the cavern (19). The base (1) is fixed with hooks at both ends. The winches can drive the base (1) to move the sample cylinder (2) in and out of the cavern (19) by hanging the cable on the hooks.

4. The intelligent follow-up support device for an ultra-large sample cylinder according to claim 3, characterized in that: The guide columns (16) are located on both sides of the first hydraulic cylinder (11). The bottom of the guide columns (16) is fixed on the ground of the cavern (19). The tops of the two guide columns (16) are fixed together by a connecting rod. The two ends of the connecting rod are fixedly connected to the side wall of the cavern (19) by a connecting column (10).

5. The intelligent follow-up support device for an ultra-large sample cylinder according to claim 4, characterized in that: The connecting ear (6) is provided with a through groove (8). When the sample tube (2) slides into the cavity (19), the guide column (16) enters the through groove (8). The end of the sliding sleeve (17) on it is connected and fixed to the connecting ear (6) by bolts. The end of the through groove (8) is fixed with a locking block (7) for limiting and locking the two guide columns (16).

6. The intelligent follow-up support device for an ultra-large sample cylinder according to claim 5, characterized in that: The piston rod end of the second hydraulic cylinder (13) is provided with a ball head (20). One end of the pressure seat (21) in the adaptive pressure head (12) is provided with a concave surface corresponding to the arc surface of the ball head (20). The ball head (20) abuts against the pressure seat (21). The outside of the pressure seat (21) is connected to the piston rod through multiple connectors (22). The inside of the connector (22) is a through groove. The two ends of the through groove are connected to the pressure seat (21) and the piston rod respectively through bolts (23).

7. The intelligent follow-up support device for an ultra-large sample cylinder according to claim 6, characterized in that: The base (1) is provided with a boss (101), the sample tube (2) is fitted on the boss (101), a rolling device (103) is provided between the middle of the boss (101) and the sample tube (2), and a sealing ring (102) is fixed on the outer side of the top of the boss (101), and the outer side of the sealing ring (102) abuts against the inner wall of the sample tube (2).

8. The method of using the intelligent follow-up support device for an ultra-large sample cylinder according to claim 7, characterized in that: S1. After filling the sample into the sample tube (2) outside the cavern (19), the pressure plate (3) is hoisted into the sample tube (2) and pulled into the cavern (19) by a winch. S2. When the sample tube (2) moves into the cavity (19), the through groove (8) on the connecting ears (6) on both sides is engaged with the guide post (16). After it moves into place, the sliding sleeve (17) on the guide post (16) is fixed to the connecting ear (6) by bolts, and the locking block (7) is locked at the opening at the end of the through groove (8). S3. Drive the third hydraulic cylinder (15) to drive the second track (9) and the whole slowly down so that the base (1) falls on the base support (18). Then drive the piston rod of the first hydraulic cylinder (11) to extend and connect and fix its end to the connecting ear (6) with bolts to complete the preparation before the test. S3. During the test, a load N is applied to the pressure plate (3) by the second hydraulic cylinder (13). X Simultaneously, the data transmission system transmits the loading parameters to the intelligent control system (24), and the frictional force F between the sample cylinder (2) and the sample... X For N X The function of the sample cylinder (2), and the supporting force P of the sample cylinder (2). x =f(F x ), thus determining P X The first hydraulic cylinder (11) in the hydraulic servo stabilizing device (5) stabilizes and supports the sample cylinder (2), and makes the sample cylinder (2) move with the deformation of the sample. No new friction force is generated between the sample cylinder (2) and the sample, so that the disturbance of the sample cylinder (2) to the sample is minimized, ensuring that the test process is smooth, safe and reliable.

9. The method of using the intelligent follow-up support device for an ultra-large sample cylinder according to claim 8, characterized in that: During the test, the load N applied to the pressure plate (3) by the second hydraulic cylinder (13) X The supporting force T of the base platform (18) X Under the action of the sample, the sample inside the sample tube (2) will be relatively compressed, resulting in relative displacement between the sample and the wall of the sample tube (2), forming opposing frictional forces F. 上x F 下x F 上x F 下x For N X The function; F 上x F 下x The resultant force F x = F 上x- F 下x The weight of the sample cylinder (2) is G0, P x =G0- F x F x For N X The function, therefore, P x For N X The function is used to establish the test load N. X and the supporting force P provided for the sample cylinder x In relation to this, the first hydraulic cylinder (11) actively provides the supporting force P required to balance and stabilize the sample cylinder (2). x ; In order to make the specimen inside the suspended specimen cylinder (2) deform synchronously and uniformly in both directions under pressure, so that the relative displacement between the specimen and the cylinder wall generates opposing frictional forces F. 上x F 下x The balance of the suspension of the specimen cylinder reduces the effect on the effective stress of the specimen by a factor of two.

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