CN113607919B - Frost heaving and thawing sinking test device - Google Patents
Frost heaving and thawing sinking test device Download PDFInfo
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- CN113607919B CN113607919B CN202110865755.8A CN202110865755A CN113607919B CN 113607919 B CN113607919 B CN 113607919B CN 202110865755 A CN202110865755 A CN 202110865755A CN 113607919 B CN113607919 B CN 113607919B
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Abstract
The invention provides a frost heaving and thaw collapse test device which comprises a bottom plate, an excavating mechanism, a freezing pipe, a soil sample fixing and detecting mechanism and a control mechanism, wherein the soil sample fixing and detecting mechanism comprises a turnover plate, a first hydraulic cylinder and a frost heaving and thaw collapse amount detecting structure, the frost heaving and thaw collapse amount detecting mechanism comprises a stress plate, a spring, a push rod and a pressure sensor, a soil sample to be tested is placed between the turnover plates, a freezing hole and a communication channel are dug out on the soil sample through the excavating mechanism, after the freezing pipe is inserted into the freezing hole, the turnover plate is turned to enable the frost heaving and thaw collapse amount detecting mechanism to face the soil sample, then low-temperature saline water and high-temperature saline water are introduced into the freezing pipe to perform a frost heaving and thaw collapse test, the soil sample can deform when being frozen and thawed, the stress plate is subjected to external force or external force, and the thrust of the stress plate to the pressure sensor is pushed to change, finally, stress changes in the frost heaving and thawing process can be displayed, and theoretical guidance is provided for the subsequent actual construction process.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering, in particular to a frost heaving and thaw collapse testing device.
Background
With the continuous development of living standards and science and technology of people, the road network and the railway network in China have been developed in all directions, and the convenience degree of people in going out is greatly improved.
In a horizontal freezing method freezing and thawing stress experiment simulation device with the publication number of CN109374463A (hereinafter referred to as D1), a soil sample is frozen through an arranged freezing pipe, pressure sensors are arranged in the soil body to detect pressure changes in the freezing and thawing processes, however, the pressure sensors of D1 only detect changes in the soil body, and for the freezing and thawing, the caused influences are mainly concentrated on two sides and the top of the soil body, and D1 cannot obtain comprehensive freezing and thawing data, and theoretical guidance cannot be provided for the actual construction process.
Disclosure of Invention
Therefore, the invention provides a frost heaving and thawing-sinking test device which can detect the influence of a soil sample on the surrounding environment when frost heaving and thawing sinking occur, thereby providing theoretical guidance for the actual construction process.
The technical scheme of the invention is realized as follows:
a frost heaving and thaw collapse testing device comprises a bottom plate, an excavating mechanism, a freezing pipe, a soil sample fixing and detecting mechanism and a control mechanism; the soil sample fixing and detecting mechanism comprises turnover plates, a first hydraulic cylinder and a frost heaving and thawing settlement detecting structure, the turnover plates are arranged above the bottom plate, a soil sample placing cavity is formed between the turnover plates, and the first hydraulic cylinder drives the turnover plates to move above the bottom plate so as to adjust the size of the soil sample placing cavity; the frost heaving and thawing settlement detecting mechanism is arranged on the side face, far away from the soil sample placing cavity, of the turnover plate and comprises stress plates, springs, push rods and pressure sensors, the stress plates are arranged on one side of the turnover plate in an array mode, a cavity is formed between the stress plates and the turnover plate, the springs, the push rods and the pressure sensors are arranged in the cavity, the springs are connected with the side walls of the stress plates and the side walls of the turnover plate, the push rods are arranged on the side walls of the stress plates, and the pressure sensors are arranged on the side walls of the turnover plate and located on one side of the push rods; the excavating mechanism is positioned on one side of the soil sample placing cavity and is used for excavating the soil sample in the soil sample placing cavity to obtain a communication channel and a freezing hole, and the freezing pipe is arranged in the freezing hole; the control mechanism is arranged on one side of the bottom plate and comprises a main control unit and a display screen, and the main control unit is electrically connected with the display screen, the excavating mechanism, the first hydraulic cylinder and the pressure sensor respectively.
Preferably, the excavating mechanism comprises a movable plate, a channel excavating bit, a sliding plate, a frozen hole excavating bit and a second hydraulic cylinder, the movable plate is arranged on the upper surface of the bottom plate in a sliding manner and located on one side of the soil sample placing cavity, the channel excavating bit is arranged in the middle of the side wall of the movable plate, the sliding plate is symmetrically arranged on the side wall of the movable plate on two sides of the channel excavating bit, the frozen hole excavating bits are arranged on the sliding plate in an array manner, the second hydraulic cylinder is arranged on the upper surface of the bottom plate, an output shaft of the second hydraulic cylinder is connected with one side, far away from the soil sample placing cavity, of the movable plate, and the main control unit is electrically connected with the channel excavating bit, the frozen hole excavating bit and the second hydraulic cylinder respectively.
Preferably, the bottom plate is provided with a track, the track extends towards the soil sample placing cavity from the movable plate, the bottom of the movable plate is provided with a sliding wheel, and the sliding wheel is arranged inside the track.
Preferably, the side wall of the moving plate is provided with a sliding groove, a plurality of positioning grooves are formed in the sliding groove, the side face of the sliding plate is provided with an elastic collision bead, the elastic collision bead is located in the sliding groove, and the sliding plate is moved to enable the elastic collision bead to be popped out of the positioning grooves.
Preferably, the soil sample fixing and detecting mechanism further comprises a lifting plate and a third hydraulic cylinder, the lifting plate is located above the soil sample placing cavity, an output shaft of the third hydraulic cylinder is connected with the top surface of the lifting plate, the frost heaving and thawing settlement detecting mechanism is arranged on the bottom surface of the lifting plate, and the main control unit is electrically connected with the third hydraulic cylinder.
Preferably, still include water-stop mechanism, water-stop mechanism includes first water-stop sheet, second water-stop sheet and first electric putter, first water-stop sheet sets up in lifter plate bottom surface middle part, the bottom plate upper surface is provided with the bar groove, the second water-stop sheet sets up inside the bottom plate to be located bar groove below, first electric putter sets up inside the bottom plate, and its output shaft is connected with the second water-stop sheet bottom surface, the main control unit is connected with first electric putter electricity.
Preferably, still include the portal frame, the portal frame sets up at the bottom plate upper surface to stride across and place the chamber top at the soil sample, the third pneumatic cylinder sets up the bottom surface at the portal frame roof, soil sample is fixed and detection mechanism still includes the rotating electrical machines, the portal frame lateral wall is provided with the horizontal plate, the rotating electrical machines slides and sets up on the horizontal plate, and its output shaft is connected with the returning face plate lateral wall, first pneumatic cylinder sets up on the horizontal plate upper surface for drive rotating electrical machines drives the returning face plate and removes, the master control unit is connected with the rotating electrical machines electricity.
Preferably, the soil sample fixing and detecting mechanism further comprises a bearing plate, the bearing plate is arranged on the horizontal plate in a sliding mode, the rotating motor is arranged on the upper surface of the bearing plate, and the output shaft of the first hydraulic cylinder is connected with the side wall of the bearing plate.
Preferably, still include limiting plate and second electric putter, the limiting plate slides and sets up on the bottom plate, the soil sample is placed the chamber and is located the limiting plate and excavate between the mechanism, second electric putter sets up on the bottom plate, and its output shaft keeps away from the lateral wall that the soil sample was placed the chamber with the limiting plate and is connected, the main control unit is connected with second electric putter electricity.
Preferably, the limiting plate is provided with a through hole communicated with the communication channel.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a frost heaving and thawing sinking test device, which can excavate a soil sample to be tested by an excavating mechanism after the soil sample is placed between turnover plates for limiting, then the freezing pipe is placed in a freezing hole dug by the digging mechanism to the soil sample, the turnover plate is turned over to the state that the frost heaving and thaw collapse amount detection mechanism is contacted with the soil sample, then freezing and unfreezing the soil sample can be realized by conveying low-temperature or high-temperature saline water into the freezing pipe, the stress plate can be extruded or popped up due to the deformation of the soil sample in the freezing or unfreezing process, the stress plate drives the push rod to be in contact with the pressure sensor, the data detected by the pressure sensor is displayed on a display screen after being processed by the main control unit, therefore, the tester can know the frost heaving amount and the thaw settlement amount generated at different positions of the two sides around the tester when the frost heaving and the thaw settlement occur, and the obtained data can be used for guidance in actual engineering.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only preferred embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a frost heaving and thaw collapse testing apparatus according to the present invention;
FIG. 2 is an enlarged view taken at A in FIG. 1;
FIG. 3 is a schematic structural diagram of a frost heaving and thaw settlement amount detection mechanism of the frost heaving and thaw settlement test device of the present invention;
FIG. 4 is a schematic structural diagram of a frost heaving and thaw collapse testing apparatus according to the present invention during testing;
in the figure, 1 is a bottom plate, 2 is a freezing pipe, 3 is a turning plate, 4 is a first hydraulic cylinder, 5 is a soil sample placing cavity, 6 is a stressed plate, 7 is a spring, 8 is a push rod, 9 is a pressure sensor, 10 is a cavity, 11 is a communication channel, 12 is a freezing hole, 13 is a main control unit, 14 is a display screen, 15 is a moving plate, 16 is a channel digging bit, 17 is a sliding plate, 18 is a freezing hole digging bit, 19 is a second hydraulic cylinder, 20 is a rail, 21 is a sliding wheel, 22 is a sliding chute, 23 is a positioning plate, 24 is an elastic collision ball, 25 is a lifting plate, 26 is a third hydraulic cylinder, 27 is a first water stop plate, 28 is a second water stop plate, 29 is a first electric push rod, 30 is a strip-shaped groove, 31 is a portal frame, 32 is a rotating motor, 33 is a horizontal plate, 34 is a limiting plate, 35 is a limiting plate, 36 is a second electric push rod, and 37 is a through hole.
Detailed Description
For a better understanding of the technical content of the present invention, a specific embodiment is provided below, and the present invention is further described with reference to the accompanying drawings.
Referring to fig. 1 to 4, the invention provides a frost heaving and thaw collapse testing device, which comprises a bottom plate 1, an excavating mechanism, a freezing pipe 2, a soil sample fixing and detecting mechanism and a control mechanism; the soil sample fixing and detecting mechanism comprises turnover plates 3, first hydraulic cylinders 4 and a frost heaving and thawing settlement detecting structure, wherein the turnover plates 3 are arranged above the bottom plate 1, soil sample placing cavities 5 are formed among the turnover plates 3, and the first hydraulic cylinders 4 drive the turnover plates 3 to move above the bottom plate 1 so as to adjust the size of the soil sample placing cavities 5; the frost heaving and thawing settlement detecting mechanism is arranged on the side face, away from the soil sample placing cavity 5, of the turnover plate 3 and comprises stress plates 6, springs 7, push rods 8 and pressure sensors 9, the stress plates 6 are arranged on one side of the turnover plate 3 in an array mode, cavities 10 are formed between the stress plates and the turnover plate 3, the springs 7, the push rods 8 and the pressure sensors 9 are arranged in the cavities 10, the springs 7 are connected with the side walls of the stress plates 6 and the side walls of the turnover plate 3, the push rods 8 are arranged on the side walls of the stress plates 6, and the pressure sensors 9 are arranged on the side walls of the turnover plate 3 and located on one side of the push rods 8; the excavating mechanism is positioned on one side of the soil sample placing cavity 5 and is used for excavating the soil sample in the soil sample placing cavity 5 to obtain a communication channel 11 and a freezing hole 12, and the freezing pipe 2 is arranged in the freezing hole 12; the control mechanism is arranged on one side of the bottom plate 1 and comprises a main control unit 13 and a display screen 14, wherein the main control unit 13 is electrically connected with the display screen 14, the excavating mechanism, the first hydraulic cylinder 4 and the pressure sensor 9 respectively.
The invention relates to a frost heaving and thaw collapse test device, which is used for performing simulation tests on a frost heaving process and a thaw collapse process of a soil sample, acquiring the generated frost heaving amount and thaw collapse amount, providing theoretical guidance for subsequent actual construction, collecting soil in a region to be constructed and manufacturing the soil sample during the tests, placing the soil sample in a soil sample placing cavity 5, clamping and fixing the soil sample through turnover plates 3 arranged at two sides, excavating the soil sample through an arranged excavating mechanism to ensure that a communication channel 11 and a plurality of freezing holes 12 are excavated in the soil sample, completing the preparation before the tests after inserting a freezing pipe 2 into the freezing holes 12, then overturning the turnover plates 3 for 180 degrees to ensure that a frost heaving and thaw collapse amount detection mechanism is positioned at two sides of the soil sample and is contacted with the soil sample, freezing the soil sample after introducing low-temperature saline water into the freezing pipe 2, completing the freezing tests, and then high-temperature saline water is introduced into the freezing pipe 2, so that ice crystals in the soil sample can be melted, in the freezing and melting processes, the arranged frost heaving and thaw settlement amount detection mechanism can detect deformation generated in frost heaving and thaw settlement, detected data are transmitted to the main control unit 13, the main control unit 13 displays the frost heaving amount and the thaw settlement amount on the display screen 14, and therefore testers can know the change of the corresponding soil sample in the freezing and melting processes, and theoretical guidance is provided for subsequent actual construction.
For the frost heaving and thaw collapse amount detection mechanism, deformation of a soil sample is reflected mainly through pressure change, the frost heaving and thaw collapse amount detection mechanism is arranged on one side of the turnover plate 3, when a hole is dug in the soil sample, one side of the turnover plate 3, which is not provided with the frost heaving and thaw collapse amount detection mechanism, is close to the soil sample and limits the soil sample, after the hole is dug in the soil sample, the turnover plate 3 is driven to rotate through the first hydraulic cylinder 4, the frost heaving and thaw collapse amount detection mechanism is positioned on one side of the soil sample, then the first hydraulic cylinder 4 drives the turnover plate 3 to move towards the direction of the soil sample, the stress plate 6 is in contact with the soil sample, after the stress plate 6 is in contact with the soil sample, the compression spring 7 is driven, the push rod 8 is driven to be in contact with the pressure sensor 9, at the moment, the pressure sensor 9 detects a corresponding numerical value, and the arranged main control unit 13 clears data transmitted by the pressure sensor 9 at the moment, can begin to test, when letting in low temperature salt water to freezing pipe 2, moisture in the soil sample can take place to freeze, make the soil sample take place to deform, partial atress board 6 that sets up can receive the promotion, make pressure sensor 9 detect bigger pressure, still can have partial soil body to contract inside simultaneously, atress board 6 that corresponds this moment outwards pops out under the effect of spring 7, the pressure that pressure sensor 9 detected reduces, thereby final main control unit 13 can be with the data display that all pressure sensor 9 detected on display screen 14, the tester can look over the frost heaving state that each position department takes place around the soil sample with this.
After the frost heaving test is completed, high-temperature brine can be input into the freezing pipe 2, ice crystals in the soil sample can be melted at high temperature, the soil sample can be thawed and deformed when the ice crystals are melted, the stress plates 6 arranged on two sides can be extruded and the soil sample is lost to be extruded, so that pressure data detected by the pressure sensor 9 is changed, the main control unit 13 can display the pressure data when the soil sample is thawed on the display screen 14, so that testers can know the influence of the soil sample on the periphery when the soil sample is thawed, finally the testers can judge the change condition of the soil sample during construction and after construction by synthesizing the influence of the soil sample on the periphery when the soil sample is frozen and thawed, and theoretical guidance is provided for actual construction.
Preferably, the excavating mechanism comprises a moving plate 15, a channel excavating bit 16, a sliding plate 17, a frozen hole excavating bit 18 and a second hydraulic cylinder 19, wherein the moving plate 15 is slidably arranged on the upper surface of the bottom plate 1 and located on one side of the soil sample placing cavity 5, the channel excavating bit 16 is arranged in the middle of the side wall of the moving plate 15, the sliding plate 17 is symmetrically arranged on the side wall of the moving plate 15 on two sides of the channel excavating bit 16, the frozen hole excavating bits 18 are arranged on the sliding plate 17 in an array manner, the second hydraulic cylinder 19 is arranged on the upper surface of the bottom plate 1, an output shaft of the second hydraulic cylinder is connected with one side of the moving plate 15 far away from the soil sample placing cavity 5, and the main control unit 13 is electrically connected with the channel excavating bit 16, the frozen hole excavating bit 18 and the second hydraulic cylinder 19 respectively.
After the soil sample is placed in the soil sample placing cavity 5, the soil sample can be excavated through the arranged excavating mechanism, when the excavation is carried out, the second hydraulic cylinder 19 can move the moving plate 15 and drive the channel excavating bit 16 and the frozen hole excavating bit 18 to excavate the soil sample, wherein the channel excavating bit 16 can excavate the communication channel 11 in the middle of the soil sample, the frozen hole excavating bit 18 can excavate the frozen hole 12 in the soil sample, so that the frozen pipe 2 can be inserted into the frozen hole 12, and the length of the channel excavating bit 16 is longer than that of the frozen hole excavating bit 18 because the frozen hole 12 does not need to penetrate through the whole soil sample.
In addition, the freezing hole excavating drill bit 18 is arranged to be adjustable, the sliding plate 17 can drive the freezing hole excavating drill bit 18 to move, so that the positions of the excavated freezing holes 12 are different, and for the frost heaving process of the soil body, water and pore water in the soil body can migrate towards the low-temperature direction in the freezing process, and the larger the migration amount is, the larger the frost heaving amount of the soil body is, therefore, the migration of the water in the soil body can be changed by adjusting the positions of the freezing holes 12, the optimal installation position of the freezing holes 12 can be judged by comparing the frost heaving amount data on the two sides, and guidance is provided for the actual construction process.
Preferably, the bottom plate 1 is provided with a rail 20, the rail 20 extends from the moving plate 15 to the soil sample placing cavity 5, the bottom of the moving plate 15 is provided with a sliding wheel 21, and the sliding wheel 21 is arranged inside the rail 20.
When the second hydraulic cylinder 19 drives the moving plate 15 to move, a sliding wheel 21 arranged at the bottom of the moving plate 15 slides in the track 20.
Preferably, the side wall of the moving plate 15 is provided with a sliding groove 22, a plurality of positioning grooves 23 are formed in the sliding groove 22, an elastic collision bead 24 is arranged on the side surface of the sliding plate 17, the elastic collision bead 24 is located in the sliding groove 22, and the sliding plate 17 is moved to make the elastic collision bead 24 pop out of the positioning groove 23.
The sliding plate 17 is pushed to move, so that the elastic collision balls 24 can be popped to different positioning grooves 23 to be fixed, and the position of the frozen hole digging bit 18 on the sliding plate 17 can be adjusted.
Preferably, the soil sample fixing and detecting mechanism further comprises a lifting plate 25 and a third hydraulic cylinder 26, the lifting plate 25 is located above the soil sample placing cavity 5, an output shaft of the third hydraulic cylinder 26 is connected with the top surface of the lifting plate 25, the frost heaving and thawing settlement detecting mechanism is arranged on the bottom surface of the lifting plate 25, and the main control unit 13 is electrically connected with the third hydraulic cylinder 26.
According to the invention, the lifting plate 25 is arranged at the top of the soil sample placing cavity 5, and the frost heaving and thaw settlement amount detection mechanism is arranged at the bottom of the lifting plate 25, so that the deformation of the top of the soil sample is detected, and the position adjustment of the frost heaving and thaw settlement amount detection mechanism is realized by driving the lifting plate 25 to lift through the third hydraulic cylinder 26.
Preferably, still include water stop mechanism, water stop mechanism includes first water stop sheet 27, second water stop sheet 28 and first electric putter 29, first water stop sheet 27 sets up in lifter plate 25 bottom surface middle part, 1 upper surface of bottom plate is provided with bar groove 30, second water stop sheet 28 sets up inside bottom plate 1 to be located bar groove 30 below, first electric putter 29 sets up inside bottom plate 1, and its output shaft is connected with 28 bottom surfaces of second water stop sheet, main control unit 13 is connected with first electric putter 29 electricity.
Because the moisture can migrate when being frozen, in order to prevent the moisture from migrating to the freezing pipe 2 on the other side when being frozen, the invention is provided with two water-stop plates, when the lifting plate 25 descends, the lifting plate can drive the first water-stop plate 27 to be inserted into the soil sample to isolate two sides of the top of the communication channel 11 of the soil sample, and simultaneously the first electric push rod 29 can drive the second water-stop plate 28 to ascend to isolate two sides below the communication channel 11, so that the soil sample is divided into two parts, and a comparison test is carried out to observe the influence of the freezing pipes 2 at different positions on freezing.
Preferably, the soil sample storage device further comprises a portal frame 31, wherein the portal frame 31 is arranged on the upper surface of the bottom plate 1 and spans over the soil sample storage cavity 5, the third hydraulic cylinder 26 is arranged on the bottom surface of the top plate of the portal frame 31, the soil sample fixing and detecting mechanism further comprises a rotating motor 32, the side wall of the gantry 31 is provided with a horizontal plate 33, the rotating motor 32 is arranged on the horizontal plate 33 in a sliding manner, the output shaft of the hydraulic cylinder is connected with the side wall of the turnover plate 3, the first hydraulic cylinder 4 is arranged on the upper surface of the horizontal plate 33, used for driving a rotating motor 32 to drive the turnover plate 3 to move, the main control unit 13 is electrically connected with the rotating motor 32, the soil sample fixing and detecting mechanism also comprises a bearing plate 34, the bearing plate 34 is arranged on the horizontal plate 33 in a sliding way, the rotating motor 32 is arranged on the upper surface of the bearing plate 34, and the output shaft of the first hydraulic cylinder 4 is connected with the side wall of the bearing plate 34.
The gantry 31 can provide support for the first hydraulic cylinder 4 and the third hydraulic cylinder 26, the first hydraulic cylinder 4 can push the bearing plate 34 to drive the rotating motor 32 to move on the horizontal plate 33, so that the rotating motor 32 can drive the turnover plate 3 to move, and the rotating motor 32 can drive the turnover plate 3 to turn over for 180 degrees.
Preferably, still include limiting plate 35 and second electric putter 36, limiting plate 35 slides and sets up on bottom plate 1, the soil sample is placed the chamber 5 and is located between limiting plate 35 and the excavation mechanism, second electric putter 36 sets up on bottom plate 1, and its output shaft is kept away from the lateral wall that the soil sample was placed chamber 5 with limiting plate 35 and is connected, main control unit 13 is connected with second electric putter 36 electricity, be provided with the through-hole 37 that is used for with contact passageway 11 intercommunication on the limiting plate 35.
In order to facilitate the excavation of the soil sample, the rear end of the soil sample placing cavity 5 is further provided with a limiting plate 35 and a second electric push rod 36, the second electric push rod 36 pushes the limiting plate 35 to the rear end of the soil sample placing cavity 5 to limit the soil sample, when the excavating mechanism excavates, the channel excavating bit 16 can dig the communication channel 11 in the soil sample, and the channel excavating bit 16 can drill out from the through hole 37, so that the limiting plate 35 is prevented from blocking the channel excavating bit 16.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A frost heaving and thaw collapse testing device is characterized by comprising a bottom plate, an excavating mechanism, a freezing pipe, a soil sample fixing and detecting mechanism and a control mechanism; the soil sample fixing and detecting mechanism comprises turnover plates, a first hydraulic cylinder and a frost heaving and thawing settlement detecting structure, the turnover plates are arranged above the bottom plate, a soil sample placing cavity is formed between the turnover plates, and the first hydraulic cylinder drives the turnover plates to move above the bottom plate so as to adjust the size of the soil sample placing cavity; the frost heaving and thawing settlement detecting mechanism is arranged on the side face, far away from the soil sample placing cavity, of the turnover plate and comprises stress plates, springs, push rods and pressure sensors, the stress plates are arranged on one side of the turnover plate in an array mode, a cavity is formed between the stress plates and the turnover plate, the springs, the push rods and the pressure sensors are arranged in the cavity, the springs are connected with the side walls of the stress plates and the side walls of the turnover plate, the push rods are arranged on the side walls of the stress plates, and the pressure sensors are arranged on the side walls of the turnover plate and located on one side of the push rods; the excavating mechanism is positioned on one side of the soil sample placing cavity and is used for excavating the soil sample in the soil sample placing cavity to obtain a communication channel and a freezing hole, and the freezing pipe is arranged in the freezing hole; the control mechanism is arranged on one side of the bottom plate and comprises a main control unit and a display screen, and the main control unit is electrically connected with the display screen, the excavating mechanism, the first hydraulic cylinder and the pressure sensor respectively.
2. The frost heaving and thaw collapse test device according to claim 1, wherein the excavating mechanism comprises a movable plate, a tunnel excavating bit, a sliding plate, a freezing hole excavating bit and a second hydraulic cylinder, the movable plate is slidably disposed on the upper surface of the bottom plate and located on one side of the soil sample placement cavity, the tunnel excavating bit is disposed in the middle of the side wall of the movable plate, the sliding plate is symmetrically disposed on the side wall of the movable plate on both sides of the tunnel excavating bit, the freezing hole excavating bits are arranged on the sliding plate in an array manner, the second hydraulic cylinder is disposed on the upper surface of the bottom plate, an output shaft of the second hydraulic cylinder is connected to one side of the movable plate away from the soil sample placement cavity, and the main control unit is electrically connected to the tunnel excavating bit, the freezing hole excavating bit and the second hydraulic cylinder respectively.
3. The frost heaving and thaw settlement test device according to claim 2, wherein the bottom plate is provided with a rail, the rail extends from the movable plate to the soil sample placing cavity, and the bottom of the movable plate is provided with a sliding wheel, and the sliding wheel is arranged inside the rail.
4. The frost heaving and thaw collapse test device according to claim 2, wherein the side wall of the movable plate is provided with a sliding slot, the sliding slot is provided with a plurality of positioning slots, the side of the sliding plate is provided with an elastic collision bead, the elastic collision bead is located in the sliding slot, and the sliding plate is moved to eject the elastic collision bead into the positioning slot.
5. The frost heaving and thaw settlement test device according to claim 1, wherein the soil sample fixing and detecting mechanism further comprises a lifting plate and a third hydraulic cylinder, the lifting plate is located above the soil sample placing cavity, an output shaft of the third hydraulic cylinder is connected with a top surface of the lifting plate, the frost heaving and thaw settlement amount detecting mechanism is arranged on a bottom surface of the lifting plate, and the main control unit is electrically connected with the third hydraulic cylinder.
6. The frost heaving and thawing settlement test device of claim 5, further comprising a water-stop mechanism, wherein the water-stop mechanism comprises a first water-stop plate, a second water-stop plate and a first electric push rod, the first water-stop plate is arranged in the middle of the bottom surface of the lifting plate, a strip-shaped groove is formed in the upper surface of the bottom plate, the second water-stop plate is arranged inside the bottom plate and located below the strip-shaped groove, the first electric push rod is arranged inside the bottom plate, an output shaft of the first electric push rod is connected with the bottom surface of the second water-stop plate, and the main control unit is electrically connected with the first electric push rod.
7. The frost heaving and thawing sink testing device as claimed in claim 5, further comprising a portal frame, wherein the portal frame is arranged on the upper surface of the bottom plate and spans over the soil sample placing cavity, the third hydraulic cylinder is arranged on the bottom surface of the top plate of the portal frame, the soil sample fixing and detecting mechanism further comprises a rotating motor, a horizontal plate is arranged on the side wall of the portal frame, the rotating motor is arranged on the horizontal plate in a sliding manner, an output shaft of the rotating motor is connected with the side wall of the turnover plate, the first hydraulic cylinder is arranged on the upper surface of the horizontal plate and used for driving the rotating motor to drive the turnover plate to move, and the main control unit is electrically connected with the rotating motor.
8. The frost heaving and thaw settlement test device according to claim 7, wherein the soil sample fixing and detecting mechanism further comprises a bearing plate, the bearing plate is slidably disposed on a horizontal plate, the rotating motor is disposed on an upper surface of the bearing plate, and the first hydraulic cylinder output shaft is connected to a side wall of the bearing plate.
9. The frost heaving and thaw collapse testing device according to claim 1, further comprising a limiting plate and a second electric push rod, wherein the limiting plate is slidably disposed on the bottom plate, the soil sample placing cavity is located between the limiting plate and the excavating mechanism, the second electric push rod is disposed on the bottom plate, an output shaft of the second electric push rod is connected with a side wall of the limiting plate, which is far away from the soil sample placing cavity, and the main control unit is electrically connected with the second electric push rod.
10. The frost heaving and thaw settlement test device according to claim 9, wherein the limiting plate is provided with a through hole for communicating with the communication channel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110865755.8A CN113607919B (en) | 2021-07-29 | 2021-07-29 | Frost heaving and thawing sinking test device |
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| CN202110865755.8A CN113607919B (en) | 2021-07-29 | 2021-07-29 | Frost heaving and thawing sinking test device |
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| CN113607919A CN113607919A (en) | 2021-11-05 |
| CN113607919B true CN113607919B (en) | 2022-03-29 |
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| CN114184635B (en) * | 2021-12-21 | 2023-09-08 | 河北交通职业技术学院 | Seasonal frozen soil area tunnel frost heaving force simulation test device and application method thereof |
| CN115808437B (en) * | 2023-01-17 | 2023-05-02 | 中国建筑第二工程局有限公司 | Subway communication channel freezing method construction model test device and method |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1617368A1 (en) * | 1987-05-28 | 1990-12-30 | Ленинградский Филиал Государственного Проектно-Изыскательского И Научно-Исследовательского Института "Аэропроект" | Apparatus for simulating processes of soil freezing |
| KR20120054428A (en) * | 2010-11-19 | 2012-05-30 | 한국건설기술연구원 | Measuring apparatus of frost heaving pressure for earth and sand |
| KR20130072460A (en) * | 2011-12-22 | 2013-07-02 | 한국건설기술연구원 | Measuring apparatus of frost heaving pressure for earth and sand |
| CN104749343A (en) * | 2015-03-17 | 2015-07-01 | 中山大学 | Constant-volume and temperature-controllable axial and radial soil body expansibility tester |
| CN106645261A (en) * | 2017-03-17 | 2017-05-10 | 安徽理工大学 | Large-sized multifunctional artificial freezing platform |
| CN109374463A (en) * | 2018-12-10 | 2019-02-22 | 中铁第勘察设计院集团有限公司 | Horizontal freezing frozen swell and melt settlement stress experimental simulation device |
| WO2019106640A1 (en) * | 2017-12-01 | 2019-06-06 | Universita' Degli Studi Di Roma "Tor Vergata" | Test machine for characterizing artificially frozen soil |
| CN209539356U (en) * | 2018-12-25 | 2019-10-25 | 武汉市市政建设集团有限公司 | The simulation system that subway station bottom frozen construction influences station structure |
| WO2019214007A1 (en) * | 2018-05-23 | 2019-11-14 | 安徽理工大学 | Artificial ground freezing experimental device and experimental method for dynamically acquiring multiple parameters |
| CN210068157U (en) * | 2019-06-26 | 2020-02-14 | 中交路桥建设有限公司 | Water-rich sand layer geological subway bypass freezing hole arrangement structure |
| CN211627563U (en) * | 2020-03-10 | 2020-10-02 | 天津赛威朗仪器设备有限公司 | Frozen soil frost heaving and thawing sinking testing machine |
| CN211927750U (en) * | 2020-02-26 | 2020-11-13 | 福州地铁集团有限公司 | Horizontal freezing simulator for urban underground engineering |
| CN111999471A (en) * | 2020-08-10 | 2020-11-27 | 安徽理工大学 | Stratum thawing and sinking centrifugation model test device and method for tunnel frozen wall in natural thawing period |
| CN112946011A (en) * | 2021-03-10 | 2021-06-11 | 金陵科技学院 | Soil body pressure water supplementing freeze thawing device for simulating bidirectional freezing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6448085B2 (en) * | 2014-12-19 | 2019-01-09 | ケミカルグラウト株式会社 | Ground freezing method and ground freezing system |
-
2021
- 2021-07-29 CN CN202110865755.8A patent/CN113607919B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1617368A1 (en) * | 1987-05-28 | 1990-12-30 | Ленинградский Филиал Государственного Проектно-Изыскательского И Научно-Исследовательского Института "Аэропроект" | Apparatus for simulating processes of soil freezing |
| KR20120054428A (en) * | 2010-11-19 | 2012-05-30 | 한국건설기술연구원 | Measuring apparatus of frost heaving pressure for earth and sand |
| KR20130072460A (en) * | 2011-12-22 | 2013-07-02 | 한국건설기술연구원 | Measuring apparatus of frost heaving pressure for earth and sand |
| CN104749343A (en) * | 2015-03-17 | 2015-07-01 | 中山大学 | Constant-volume and temperature-controllable axial and radial soil body expansibility tester |
| CN106645261A (en) * | 2017-03-17 | 2017-05-10 | 安徽理工大学 | Large-sized multifunctional artificial freezing platform |
| WO2019106640A1 (en) * | 2017-12-01 | 2019-06-06 | Universita' Degli Studi Di Roma "Tor Vergata" | Test machine for characterizing artificially frozen soil |
| WO2019214007A1 (en) * | 2018-05-23 | 2019-11-14 | 安徽理工大学 | Artificial ground freezing experimental device and experimental method for dynamically acquiring multiple parameters |
| CN109374463A (en) * | 2018-12-10 | 2019-02-22 | 中铁第勘察设计院集团有限公司 | Horizontal freezing frozen swell and melt settlement stress experimental simulation device |
| CN209539356U (en) * | 2018-12-25 | 2019-10-25 | 武汉市市政建设集团有限公司 | The simulation system that subway station bottom frozen construction influences station structure |
| CN210068157U (en) * | 2019-06-26 | 2020-02-14 | 中交路桥建设有限公司 | Water-rich sand layer geological subway bypass freezing hole arrangement structure |
| CN211927750U (en) * | 2020-02-26 | 2020-11-13 | 福州地铁集团有限公司 | Horizontal freezing simulator for urban underground engineering |
| CN211627563U (en) * | 2020-03-10 | 2020-10-02 | 天津赛威朗仪器设备有限公司 | Frozen soil frost heaving and thawing sinking testing machine |
| CN111999471A (en) * | 2020-08-10 | 2020-11-27 | 安徽理工大学 | Stratum thawing and sinking centrifugation model test device and method for tunnel frozen wall in natural thawing period |
| CN112946011A (en) * | 2021-03-10 | 2021-06-11 | 金陵科技学院 | Soil body pressure water supplementing freeze thawing device for simulating bidirectional freezing |
Non-Patent Citations (3)
| Title |
|---|
| Finite element study on temperature field of subway connection aisle construction via artificial ground freezing method;Yong Fu etal;《Cold Regions Science and Technology》;20210605;第189卷;第1-14页 * |
| 冻结管新型排布方式温度场敏感性分析;蔡兵华 等;《低温建筑技术》;20181231;第40卷(第12期);第114-117页 * |
| 软弱地层联络通道冻结法施工温度及位移场全程实测研究;杨平 等;《岩土工程学报》;20171231;第39卷(第12期);第2226-2234页 * |
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