Frost heaving force and deformation real-time testing device for cylindrical concrete sample under freezing-thawing-load coupling effect

Abstract

The invention provides a real-time testing device for frost heaving force and deformation of a cylindrical concrete sample under the freezing-thawing-load coupling effect, and relates to the technical field of concrete testing devices.The real-time testing device comprises a testing box body and a box cover, and the interior of the testing box body is divided into a testing cabin and a mechanism cabin through a partition plate; a cylindrical concrete sample is placed through the bearing base, a sample side edge wrapping belt is arranged in the mechanism cabin in a winding mode through a winding roller seat and wraps the side edge of the cylindrical concrete sample by a circle, and a freeze-thaw liquid inlet and outlet is further formed in the bottom, located on one side of the test cabin, of the test box body. According to the invention, targeted design is carried out aiming at the special form of the cylinder sample, so that the detection requirements of the cylinder samples with different specifications can be met, a traditional detection means is abandoned in the side edge detection process, detection is carried out by adopting a side edge wrapping belt wrapping and winding mode, and compared with an existing abutting detection means, the detection efficiency is greatly improved. The change of the cylindrical sample can be amplified, so that the test data is more intuitive.

Description

Technical Field

[0001] The invention relates to the technical field of concrete testing devices, in particular to a real-time testing device for frost heave force and deformation of a cylindrical concrete sample under freeze-thaw-load coupling. Background Art

[0002] A freeze-thaw test box with adjustable load, disclosed in the prior art with publication number "CN210401102U", comprises a box body, a bottom plate is provided at the bottom of the box body, a hydraulic device is horizontally provided on one side of the box body, a pressure-bearing device is vertically provided on the other side, a slide groove is vertically opened on the inner wall of the box body, the hydraulic device cooperates with one of the slide grooves through a first roller, and the pressure-bearing device cooperates with the other slide groove through a second roller; the device can provide a freeze-thaw and load coupling environment at the same time, thereby improving the test efficiency.

[0003] However, the above-mentioned device still has obvious defects during use: the device is suitable for freeze-thaw cycle tests on rectangular components, but there are freeze-thaw cycle requirements for various cylindrical concrete components in the prior art. For components of this structure, the above-mentioned device cannot perform relevant tests. Although the device with the prior art publication number "CN116773387B" realizes the test of cylindrical concrete components, it has strict requirements on the specifications of the samples and can only complete the testing of samples of specific specifications, which is difficult to meet the detection needs of diversified samples. Summary of the invention

[0004] The object of the present invention is to provide a real-time testing device for frost heave force and deformation of cylindrical concrete specimens under freeze-thaw-load coupling to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A real-time testing device for frost heave force and deformation of a cylindrical concrete specimen under freeze-thaw-load coupling, comprising a test box body and a box cover, wherein the box cover is used to seal and shield an opening formed above the test box body, and the test box body is divided into a test cabin and a mechanism cabin by a partition;

[0007] A supporting base is rotatably mounted on the bottom of the test chamber via a rotating shaft, the rotating shaft of the supporting base is fixedly connected to the driving shaft of the pressurized rotating motor, and the cylindrical concrete sample is placed through the supporting base. An upper clamping detection mechanism is also mounted on the box cover above the test chamber, and the upper clamping detection mechanism abuts against the upper end surface of the cylindrical concrete sample;

[0008] A sample side wrapping belt is wound around a winding roller seat in the mechanism cabin, and a torsion spring is arranged at the bottom of the winding roller seat to pull and reel the sample side wrapping belt in the absence of external force. The sample side wrapping belt passes through the strip through hole provided on the partition plate to enter the test cabin, and is wrapped around the side of the cylindrical concrete sample for one circle. Scale markings are arranged on the sample side wrapping belt, and the expansion and contraction length of the sample side wrapping belt is recorded by the scale markings. The torsion spring at the bottom of the winding roller seat is also connected to a tension sensor, and the torsion change of the torsion spring at the bottom of the winding roller seat is detected by the tension sensor. A plurality of side pressure sensors are also arranged on the sample side wrapping belt;

[0009] The test box body is also provided with a freeze-thaw liquid inlet and outlet at the bottom of one side of the test chamber, through which the freeze-thaw liquid inlet and outlet are used to inject or discharge the freeze-thaw liquid into or out of the test chamber;

[0010] During the freeze-thaw cycle in the test chamber, the cylindrical concrete specimen deforms under the influence of thermal expansion and contraction. The axial deformation and pressure change of the cylindrical concrete specimen are detected by the upper clamping detection mechanism, and the radial deformation and pressure change are detected by the side wrapping belt of the specimen.

[0011] Preferably, the supporting base is provided with a plurality of translational slide grooves arranged in a circular array, and the extension lines of the plurality of translational slide grooves all point to the axis center of the supporting base. Limiting springs are arranged in the translational slide grooves, and the limiting springs are fixedly connected to the extrusion limiting plate, and the extrusion limiting plate abuts against the surface of the cylindrical concrete specimen to limit and fix it.

[0012] Preferably, the upper clamping detection mechanism includes an upper pressure sensor, an upper limit spring and a limit clamping plate, the limit clamping plate is connected to the upper pressure sensor via the upper limit spring, and the upper pressure sensor is fixedly mounted on the bottom of the box cover.

[0013] Preferably, an upper scale column is fixedly mounted on the limit clamp, and the upper scale column extends to the outside through a through hole provided in the box cover, and the axial expansion and contraction amount of the cylindrical concrete sample during the freeze-thaw cycle is observed through the upper scale column.

[0014] Preferably, a sealing groove is provided on the partition, a sealing telescopic plate is telescopically installed in the sealing groove, the strip-shaped through hole is provided on the sealing telescopic plate, a telescopic sleeve is also fixedly installed on the sealing telescopic plate, a transition roller is fixedly rotatably installed on the telescopic end of the telescopic sleeve, the sample side wrapping belt is pulled out from the winding roller seat, laid on the transition roller and then enters the test cabin through the strip-shaped through hole, so that the sample side wrapping belt is wrapped around the cylindrical concrete sample along the tangent direction of the cylindrical concrete sample.

[0015] Preferably, a traction rope is provided at one end of the sample side wrapping belt away from the winding roller seat, and an adhesive patch is installed at the corresponding end of the traction rope away from the side wrapping belt. The adhesive patch is bonded to the surface of the cylindrical concrete sample. During the freeze-thaw cycle, the sample side wrapping belt is separated from the enclosure of the cylindrical concrete sample, and during the test, the adhesive patch is driven by the rotation of the supporting base to pull the sample side wrapping belt to unwind, and complete the surface enclosure of the cylindrical concrete sample.

[0016] Preferably, a rubber sealing strip is provided in the strip-shaped through hole, and the provision of the rubber sealing strip prevents freeze-thaw liquid from entering the mechanism cabin from the test cabin.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention is specifically designed for the special shape of cylindrical specimens, so that it can meet the inspection requirements of cylindrical specimens of different specifications. The side inspection process abandons the traditional inspection means and adopts the side wrapping belt wrapping and winding method for inspection. Compared with the existing abutment inspection means, it can amplify the changes of the cylindrical specimens, thereby making the test data more intuitive. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the internal cross-sectional structure of the present invention;

[0020] Figure 2 It is a schematic top view of the upper cross-sectional structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the cylindrical concrete specimen test of the present invention;

[0022] Figure 4 It is a schematic diagram of the connection structure between the torsion spring and the tension sensor of the present invention;

[0023] Figure 5 It is a schematic diagram of the wrapping state of the side wrapping belt of the present invention.

[0024] In the figure: 1 test box body, 2 box cover, 3 partition, 4 test cabin, 5 mechanism cabin, 6 rotating shaft, 7 supporting base, 8 cylindrical concrete specimen, 9 winding roller seat, 10 side wrapping belt, 11 torsion spring, 12 strip through hole, 13 tension sensor, 14 side pressure sensor, 15 freeze-thaw liquid inlet and outlet, 16 translation slide, 17 limit spring, 18 extrusion limit plate, 19 upper pressure sensor, 20 upper limit spring, 21 limit splint, 22 upper scale column, 23 sealing groove, 24 sealing telescopic plate, 25 telescopic sleeve, 26 transition roller, 27 traction rope, 28 adhesive patch. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-5 , the present invention provides a technical solution:

[0027] Embodiment 1:

[0028] A real-time testing device for frost heave force and deformation of a cylindrical concrete specimen under freeze-thaw-load coupling, comprising a test box body 1 and a box cover 2, wherein the box cover 2 is used to seal and shield an opening formed above the test box body 1, and the test box body 1 is divided into a test cabin 4 and a mechanism cabin 5 by a partition 3;

[0029] A supporting base 7 is rotatably mounted on the bottom of the test chamber 4 via a rotating shaft 6. The rotating shaft of the supporting base 7 is fixedly connected to the driving shaft of the pressurized rotating motor. The cylindrical concrete sample 8 is placed via the supporting base 7. An upper clamping detection mechanism is also mounted on the box cover 2 above the test chamber 4. The upper clamping detection mechanism abuts against the upper end surface of the cylindrical concrete sample 8.

[0030] A sample side wrapping belt 10 is wound around a winding roller seat 9 in the mechanism cabin 5. A torsion spring 11 is arranged at the bottom of the winding roller seat 9 to pull and reel the sample side wrapping belt 10 without external force. The sample side wrapping belt 10 passes through a strip through hole 12 provided on the partition 3 to enter the test cabin 4, and is wrapped around the side of the cylindrical concrete sample 8 for one circle. Scale markings are arranged on the sample side wrapping belt 10, and the telescopic length of the sample side wrapping belt 10 is recorded by the scale markings. The torsion spring 11 at the bottom of the winding roller seat 9 is also connected to a tension sensor 13, and the torsion change of the torsion spring 11 at the bottom of the winding roller seat 9 is detected by the tension sensor 13. A plurality of side pressure sensors 14 are also arranged on the sample side wrapping belt 10. The side sensor adopts a resistive film pressure sensor. By electrically connecting a plurality of resistive film pressure sensors to the main control MCU, the average value of a plurality of side pressure sensors 14 is calculated.

[0031] The test box body 1 is also provided with a freeze-thaw liquid inlet and outlet 15 at the bottom of one side of the test chamber 4, through which the freeze-thaw liquid inlet and outlet 15 is injected into or discharged from the test chamber 4;

[0032] During the freeze-thaw cycle of the test chamber 4, the cylindrical concrete sample 8 is deformed under the influence of thermal expansion and contraction effects. The axial deformation and pressure change of the cylindrical concrete sample 8 are detected by the upper clamping detection mechanism, and the radial deformation and pressure change are detected by the sample side wrapping belt 10.

[0033] In this embodiment, the test box body 1 serves as a bearing mechanism for various parts. The test workpiece is brought in and taken out by opening the box cover 2, and the internal space is shielded by the box cover 2. The interior of the test box body 1 is divided into a test cabin 4 and a mechanism cabin 5 by a partition 3. The test cabin 4 is used to place a cylindrical concrete sample 8. The mechanism cabin 5 is provided with a mechanism for testing it. The bottom end of the cylindrical concrete sample 8 is placed on a supporting base 7, and the upper end thereof is fixed by a limit clamping mechanism, and the side of the cylindrical concrete sample 8 is wrapped by a side wrapping belt 10. Since the cylindrical concrete sample 8 will undergo slight deformation during the freeze-thaw cycle, and the abutment-type detection means in the prior art is difficult to accurately observe its deformation amount, but by adopting this wrapping method, the entire circumferential surface of the cylindrical concrete sample 8 can be inspected. The overall deformation is easier to observe and record than the local deformation. The side wrapping belt 10 is provided with scale marks, and the expansion and contraction length of the side wrapping belt 10 of the sample is recorded by the scale marks. The circumference of the sample is measured before the sample is tested. The sample is wrapped with the side wrapping belt 10, and the scale of the side wrapping belt 10 passing through the strip through hole 12 is observed. During the freeze-thaw cycle, the scale passing through the strip through hole 12 is observed again, and the overall change of the circumference of the cylindrical concrete sample 8 can be known. The side wrapping belt 10 is wound on the winding roller seat 9, and a torsion spring 11 is provided at the bottom of the winding roller seat 9. The torsion spring 11 ensures that the side wrapping belt 10 is in a taut state. The torsion spring 11 is also connected to the tension sensor 13, and the tension change value before and after freezing and thawing is detected by the tension sensor 13. For the specific principle, please refer to the attached manual Figure 4 The winding roller seat 9 is provided with a torsion spring 11, and an end connected to the tension sensor 13 is extended in the tangential direction of the torsion spring 11. During the rotation of the winding roller seat 9, the torsion spring 11 is deformed during the rotation of the winding roller seat 9, thereby pulling the tension sensor 13, and then the value of the tension sensor 13 changes, so that the change trend of the tension values ​​detected twice before and after the freeze-thaw cycle can be obtained by detection, so as to detect the deformation process of the cylindrical concrete sample 8. A freeze-thaw liquid inlet and outlet 15 is opened in the test box body 1, and the freeze-thaw liquid is injected into or discharged from the test cabin 4 through the freeze-thaw liquid inlet and outlet 15. A rubber sealing strip is arranged in the strip-shaped through hole 12, and the setting of the rubber sealing strip prevents the freeze-thaw liquid from entering the mechanism cabin 5 from the test cabin 4;

[0034] A traction rope 27 is provided at one end of the sample side wrapping belt 10 away from the winding roller seat, and an adhesive patch 28 is installed correspondingly at the end of the traction rope 27 away from the side wrapping belt. The adhesive patch 28 is bonded to the surface of the cylindrical concrete sample 8. During the freeze-thaw cycle, the sample side wrapping belt 10 is separated from the enclosure of the cylindrical concrete sample 8, and during the test, the rotation of the supporting base 7 drives the adhesive patch 28 to pull the side wrapping belt 10 to unwind, and complete the surface enclosure of the cylindrical concrete sample 8.

[0035] Embodiment 2:

[0036] The supporting base 7 is provided with a plurality of translational slide grooves 16 arranged in a circular array, and the extension lines of the plurality of translational slide grooves 16 all point to the axis center of the supporting base 7. Limiting springs 17 are arranged in the translational slide grooves 16, and the limiting springs 17 are fixedly connected to the extrusion limiting plate 18, and the extrusion limiting plate 18 rests on the surface of the cylindrical concrete specimen 8 to limit and fix it.

[0037] In this embodiment, a limiting mechanism for the cylindrical concrete sample 8 is further disclosed, and the sample is squeezed by the squeezing limiting plates 18 arranged in a ring array, so that it can be stably limited at the axis center of the supporting base 7.

[0038] Embodiment three:

[0039] The upper clamping detection mechanism includes an upper pressure sensor 19 , an upper limit spring 20 and a limit clamping plate 21 . The limit clamping plate 21 is connected to the upper pressure sensor 19 via the upper limit spring 20 . The upper pressure sensor 19 is fixedly mounted on the bottom of the box cover 2 .

[0040] An upper scale column 22 is also fixedly mounted on the limit clamp 21 . The upper scale column 22 extends to the outside through the through hole of the box cover 2 . The axial expansion and contraction of the cylindrical concrete sample 8 during the freeze-thaw cycle is observed through the upper scale column 22 .

[0041] In this embodiment, the specific structure of the upper clamping detection mechanism is further disclosed. The upper end surface of the sample is squeezed and fixed by a limit clamp 21. When the sample undergoes axial expansion and contraction deformation, the limit clamp 21 is pushed to move up and down, which correspondingly changes the extrusion value of the upper limit spring 20 on the upper pressure sensor 19, thereby detecting the deformation. At the same time, an upper scale column 22 is provided to facilitate reading the specific value of the expansion and contraction. Since the upper limit spring 20 is connected to the upper pressure sensor 19, during the freeze-thaw cycle, the axial deformation of the cylindrical concrete sample 8 will push the upper limit spring 20 to deform upward, and the deformation of the upper limit spring 20 will squeeze the upper pressure sensor 19 to produce a pressure change. By recording the values ​​of the upper pressure sensor 19 twice, the axial pressure change value can be intuitively obtained.

[0042] Embodiment 4:

[0043] A sealing groove 23 is provided on the partition 3, and a sealing telescopic plate 24 is telescopically installed in the sealing groove 23. A strip through hole 12 is provided on the sealing telescopic plate 24. A telescopic sleeve 25 is also fixedly installed on the sealing telescopic plate 24. A transition roller 26 is fixedly rotatably installed on the telescopic end of the telescopic sleeve 25. The sample side wrapping belt 10 is pulled out from the winding roller seat 9, and is laid on the transition roller 26 and then enters the test chamber 4 through the strip through hole 12, so that the sample side wrapping belt 10 is wrapped around the cylindrical concrete sample 8 along the tangential direction of the cylindrical concrete sample 8.

[0044] In this embodiment, a transition roller 26 and a sealing telescopic plate 24 and other mechanisms are further disclosed. Through adjustment between the structures, the sample side wrapping belt 10 can wrap around the cylindrical concrete sample 8 along the tangential direction thereof, thereby ensuring the accuracy of the test results.

[0045] Test method:

[0046] A cylindrical concrete sample 8 is placed at the axis of the supporting base 7, and a plurality of adhesive patches 28 are sequentially glued to the concrete sample 8 from top to bottom. Before the freeze-thaw cycle, the supporting base 7 rotates so that the side wrapping belt 10 performs the first enclosure wrapping on the cylindrical concrete sample 8, and records the values ​​of the side pressure sensor 14 and the tension sensor 13 during the first enclosure wrapping, and records the value of the upper pressure sensor 19 and the value of the protrusion of the upper scale column 22, thereby recording the initial axial pressure value, the axial initial scale, the side initial scale, and the side initial scale before the freeze-thaw cycle. The initial tension value of the side is measured. After the test is completed, the supporting base 7 unwinds the side wrapping belt 10 to separate it from the surface wrapping of the cylindrical concrete sample 8. At this time, the side wrapping belt 10 is connected to the cylindrical concrete sample 8 through the traction rope 27, and then the freeze-thaw liquid is injected to simulate the freeze-thaw cycle process. Since the freeze-thaw cycle process lasts for a long time, a timer is set on the device. The interval of the timer can be set to 2h or 3h. The timer is electrically connected to the main control MCU, and the main control MCU is also electrically connected to each electrical component in the device, so that the main control MCU The working instructions are sent to each electrical component, wherein the main control MCU uses the EM78P134N single-chip microcomputer produced by Taiwan Elan Electronics Co., Ltd., so that the device can perform an autonomous detection at a set interval until the freeze-thaw cycle is completed. The specific detection operation is as follows: the rotation of the supporting base 7 drives the traction rope 27 to be wound up, and the cylindrical concrete sample 8 is wrapped up multiple times. When it is detected that the side pressure sensor 14 is consistent with the value of the first enclosure and wrapping, the supporting base 7 stops the winding operation, and the value of the side wrapping belt 10 set during the current enclosure and wrapping process is recorded. By setting the change value of the scale mark line, the trend diagram of the overall expansion and contraction change of the side of the cylindrical concrete sample 8 during the freeze-thaw cycle can be drawn, and the value of the tension sensor 13 in each interval process is recorded in turn. By comparing with the value of the tension sensor 13 in the first enclosure state, the overall side tension change value of the cylindrical concrete sample 8 during the inflation process can be obtained; and by observing the value changes of the upper pressure sensor 19 and the upper scale column 22, the axial expansion and contraction change value of the cylindrical concrete sample 8 during the freeze-thaw cycle and the axial pressure change value can be obtained.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A real-time testing device for frost heave force and deformation of cylindrical concrete specimens under freeze-thaw-load coupling, comprising a test box and a box cover, characterized in that: The box cover is used to close and shield the opening formed above the test box body, and the test box body is divided into a test chamber and a mechanism chamber by a partition; A supporting base is rotatably mounted on the bottom of the test chamber via a rotating shaft, the rotating shaft of the supporting base is fixedly connected to the driving shaft of the pressurized rotating motor, and the cylindrical concrete sample is placed through the supporting base. An upper clamping detection mechanism is also mounted on the box cover above the test chamber, and the upper clamping detection mechanism abuts against the upper end surface of the cylindrical concrete sample; A sample side wrapping belt is wound around a winding roller seat in the mechanism cabin, and a torsion spring is arranged at the bottom of the winding roller seat to pull and reel the sample side wrapping belt in the absence of external force. The sample side wrapping belt passes through the strip through hole provided on the partition plate to enter the test cabin, and is wrapped around the side of the cylindrical concrete sample for one circle. Scale markings are arranged on the sample side wrapping belt, and the expansion and contraction length of the sample side wrapping belt is recorded by the scale markings. The torsion spring at the bottom of the winding roller seat is also connected to a tension sensor, and the torsion change of the torsion spring at the bottom of the winding roller seat is detected by the tension sensor. A plurality of side pressure sensors are also arranged on the sample side wrapping belt; The test box body is also provided with a freeze-thaw liquid inlet and outlet at the bottom of one side of the test chamber, through which the freeze-thaw liquid inlet and outlet are used to inject or discharge the freeze-thaw liquid into or out of the test chamber; During the freeze-thaw cycle in the test chamber, the cylindrical concrete specimen deforms under the influence of thermal expansion and contraction. The axial deformation and pressure change of the cylindrical concrete specimen are detected by the upper clamping detection mechanism, and the radial deformation and pressure change are detected by the side wrapping belt of the specimen.

2. The real-time testing device for frost heave force and deformation of cylindrical concrete specimens under freeze-thaw-load coupling according to claim 1, characterized in that: The supporting base is provided with a plurality of translational slide grooves arranged in a circular array, and the extension lines of the plurality of translational slide grooves all point to the axis center of the supporting base. Limiting springs are arranged in the translational slide grooves, and the limiting springs are fixedly connected to the extrusion limiting plate, and the extrusion limiting plate abuts against the surface of the cylindrical concrete specimen to limit and fix it.

3. A real-time testing device for frost heave force and deformation of a cylindrical concrete specimen under freeze-thaw-load coupling according to claim 1 or 2, characterized in that: The upper clamping detection mechanism includes an upper pressure sensor, an upper limit spring and a limit clamping plate. The limit clamping plate is connected to the upper pressure sensor through the upper limit spring. The upper pressure sensor is fixedly mounted on the bottom of the box cover.

4. The real-time testing device for frost heave force and deformation of cylindrical concrete specimens under freeze-thaw-load coupling according to claim 3 is characterized in that: An upper scale column is also fixedly mounted on the limit clamp, and the upper scale column extends to the outside through a through hole provided in the box cover, and the axial expansion and contraction amount of the cylindrical concrete sample during the freeze-thaw cycle is observed through the upper scale column.

5. The real-time testing device for frost heave force and deformation of cylindrical concrete specimens under freeze-thaw-load coupling according to claim 4, characterized in that: A sealing groove is provided on the partition plate, a sealing telescopic plate is telescopically installed in the sealing groove, the strip-shaped through hole is provided on the sealing telescopic plate, a telescopic sleeve is fixedly installed on the sealing telescopic plate, a transition roller is fixedly rotatably installed on the telescopic end of the telescopic sleeve, the sample side wrapping belt is pulled out from the winding roller seat, laid on the transition roller and then enters the test cabin through the strip-shaped through hole, so that the sample side wrapping belt is wrapped around the cylindrical concrete sample along the tangent direction of the cylindrical concrete sample.

6. The real-time testing device for frost heave force and deformation of cylindrical concrete specimens under freeze-thaw-load coupling according to claim 5, characterized in that: A traction rope is arranged at one end of the sample side wrapping belt away from the winding roller seat, and an adhesive patch is installed at the corresponding end of the traction rope away from the side wrapping belt. The adhesive patch is bonded to the surface of the cylindrical concrete sample. During the freeze-thaw cycle, the sample side wrapping belt is separated from the enclosure of the cylindrical concrete sample, and during the test, the adhesive patch is driven by the rotation of the supporting base to pull the sample side wrapping belt to unwind, and complete the surface enclosure of the cylindrical concrete sample.

7. A real-time testing device for frost heave force and deformation of cylindrical concrete specimens under freeze-thaw-load coupling according to claim 6, characterized in that: A rubber sealing strip is arranged in the strip-shaped through hole, and the setting of the rubber sealing strip prevents the freeze-thaw liquid from entering the mechanism cabin from the test cabin.

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