One-way frost heaving and thaw settlement prevention device for railroad bed in seasonal frozen soil region

Abstract

The one-way frost heaving and thaw collapse prevention device comprises a box body, a movable plate, a vertical plate and a spring set device, an opening is formed in one side of the box body, and the movable plate is parallel to the opening of the box body and is connected into the box body in a sliding mode. The spring set device is transversely connected between the back face of the movable plate and the side wall of the box body and used for pushing the movable plate to the opening direction of the box body, the two vertical plates are parallel to each other and are connected to the front face of the movable plate in the mode that the two vertical plates are perpendicular to the movable plate, and the spring set device comprises a pressing rod, a sleeve and a spring; the pressing rod is connected to the back face of the movable plate and coaxial with the sleeve, one end of the pressing rod is slidably inserted into the sleeve, the spring is arranged in the sleeve in a compressed state, and the two ends of the spring abut against the end of the pressing rod and the side wall of the box body respectively. According to the utility model, the spring is arranged in the sleeve and the pressing rod, so that the spring is protected, and the problem that the spring is stuck and fails when soil particles enter the reinforced concrete box body is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of anti-freezing and thawing settlement of railway roadbed, in particular to a one-way anti-freezing and thawing settlement device for railway roadbed in seasonal frozen soil areas. Background Art

[0002] In seasonally frozen ground areas, frozen ground disasters will cause uneven frost heave and thaw subsidence on the roadbed surface. In serious cases, it will endanger driving safety.

[0003] Currently, the main measures for preventing and controlling frost damage in existing railway subgrades include: replacement filling, physical and chemical methods, drainage and water isolation, and the frost damage pad slope method. The replacement filling method replaces the existing frost-heaving soil in the subgrade with non-frost-heaving soils such as coarse sand, gravel sand, and sand and gravel. This replacement method can prevent the subgrade from frost heaving. However, this method involves a large working area, a long time, multiple steps, and requires interrupting traffic. It is rarely used in actual frost damage remediation projects. The physical and chemical method involves adding certain substances (such as industrial salt) to the soil to change the interaction between soil particles and water, causing water migration in the soil and changes in its freezing point, thereby reducing soil frost heaving. This method is simple to construct, but requires annual autumn operations, is costly, has a short maintenance period, and causes pollution and corrosion to the environment, rails, and fasteners. The drainage and water-isolating method is a method for lowering the groundwater level, reducing the soil moisture content within the seasonal thaw layer, cutting off the water supply source, and removing surface water. In actual application, this method is difficult to drain the water from the roadbed, and it cannot achieve the corresponding function for frost damage in the cutting section, so it cannot achieve satisfactory results. The frost damage pad slope method is to insert bamboo or rubber pads between the rails and the sleepers to follow the slope when the roadbed is frozen. During the period of frost damage, the pads must be placed as they are raised. When the frozen soil melts, the pads are removed and removed as they fall. During the period of frost damage, the pads must be removed as they fall. This method is repetitive and difficult to complete in one go. The workload is very large and time-consuming.

[0004] In order to better solve the problem of frost damage to existing roadbeds in seasonally frozen soil areas, the invention patent with patent number CN105887605B discloses a device for preventing frost heave and thaw settlement of roadbeds based on the stress relief method. The device consists of a reinforced concrete box, a reinforced concrete movable plate, a spring group device and a self-propelled anchor rod. The device has high strength and high rigidity. When buried in the roadbed, it can meet the roadbed's requirements for bearing capacity and deformation. During frost heave, the roadbed fill generates frost heave force, which pushes the movable plate to horizontally displace, unloading the frost heave force in the roadbed, reducing or eliminating the amount of frost heave of the roadbed, and at the same time, the spring group device stores energy; during thawing, the stiffness of the soil around the movable plate decreases, and the energy stored in the spring group device in turn pushes the movable plate, which squeezes the roadbed soil and reduces the amount of thaw settlement of the roadbed. Repeating this process over several freeze-thaw cycles can effectively reduce or eliminate the frost heave and thaw settlement hazards of frozen soil.

[0005] However, the spring assembly of the device is exposed in the reinforced concrete box. When soil particles enter the reinforced concrete box, the spring assembly may become stuck and fail. Utility Model Content

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide a one-way anti-freeze heave and thaw settlement device for railway roadbed in seasonally frozen soil areas.

[0007] In order to solve the above problems, the present invention adopts the following technical solutions:

[0008] A one-way anti-freeze heaving and thawing device for railway roadbed in seasonal frozen soil areas includes a box body, a movable plate, a vertical plate and a spring group device. The box body is open to one side, the movable plate is parallel to the opening of the box body and is slidably connected in the box body, the spring group device is laterally connected between the back side of the movable plate and the side wall of the box body to push the movable plate toward the opening direction of the box body, the two vertical plates are parallel to each other and are connected to the front side of the movable plate at right angles to each other, the spring group device includes a pressure rod, a sleeve and a spring, the sleeve is connected to the side wall of the box body, the pressure rod is connected to the back side of the movable plate and is coaxial with the sleeve, one end of the pressure rod is slidably inserted in the sleeve, the spring is placed in a compressed state in the sleeve and its two ends respectively abut the end of the pressure rod and the side wall of the box body.

[0009] Preferably, the box body includes a bottom plate, a top plate, a back plate and two side plates, the two side plates are vertically connected to both sides of the back plate, the bottom edge and the top edge of the back plate and the two side plates are respectively connected to the three edges of the bottom plate and the top plate to form a box body with an opening on one side, and the back plate is opposite to the opening of the box body.

[0010] Preferably, the top plate and movable plate are prefabricated from steel bars and concrete respectively, the bottom plate, back plate and two side plates are prefabricated from steel bars and concrete as a whole, the top plate is connected to the top of the back plate and two side plates and together with the bottom plate, back plate and two side plates form a reinforced concrete box.

[0011] Preferably, the box body is provided with a self-propelled anchor rod connected to the bottom of the box body by bolts, and the self-propelled anchor rod is driven into the box body to a depth of 300 cm below the local freezing line.

[0012] Preferably, the side of the vertical plate away from the movable plate is arranged in a triangular tip structure.

[0013] Preferably, a pulley is provided at the bottom of the movable plate, and the pulley is rollingly connected to the surface of the bottom plate.

[0014] Preferably, the back plate is double-layered and the two layers are connected by bolts.

[0015] Preferably, a rubber gasket is pressed between the two layers of back plates, and the rubber gasket is sleeved on the bolts used to connect the two layers of back plates.

[0016] Preferably, the edges of the side surfaces of the two side panels facing each other are respectively provided with stop plates extending towards each other, and the edges of the two stop plates are respectively in contact with the side surfaces of the two vertical panels.

[0017] Preferably, the top edge of the movable plate is in contact with the top plate, the bottom edge of the movable plate is connected to a retaining strip, and the bottom of the retaining strip is in contact with the bottom plate.

[0018] Beneficial effects of the utility model:

[0019] Compared with the prior art, the advantages of the present invention are:

[0020] The utility model protects the spring by arranging the spring in the sleeve and the pressure rod, thereby solving the problem that the spring is stuck and fails when soil particles enter the reinforced concrete box, resulting in the movable plate being unable to reset itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the utility model;

[0022] Figure 2 It is a transverse cross-sectional view of the present utility model;

[0023] Figure 3 It is a longitudinal cross-sectional view of the utility model;

[0024] Figure 4 for Figure 3 A partial enlarged view of point A in the middle;

[0025] Figure 5 This is a schematic diagram of the arrangement of the utility model on the cross section of the roadbed;

[0026] Figure 6 It is a schematic diagram of the arrangement of the utility model along the longitudinal direction of the roadbed. DETAILED DESCRIPTION

[0027] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0028] In the description of this utility model, it should be noted that the terms "upper / lower end," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "set / mounted," "sleeved," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0030] See also Figure 1-6 The utility model provides a technical solution: a one-way anti-freezing and thawing device for railway roadbed in seasonal frozen soil areas, comprising a box body 1, a movable plate 2, a vertical plate 3 and a spring group device 4. The box body 1 is open to one side, the movable plate 2 is parallel to the opening of the box body 1 and is slidably connected to the box body 1, the spring group device 4 is horizontally connected between the back side of the movable plate 2 and the side wall of the box body 1 for pushing the movable plate 2 toward the opening direction of the box body 1. The two vertical plates 3 are parallel to each other and are connected to the front side of the movable plate 2 at right angles to the movable plate 2. The spring group device 4 includes a pressure rod 41, a sleeve 42 and a spring 43. The sleeve 42 is connected to the side wall of the box body 1, the pressure rod 41 is connected to the back side of the movable plate 2 and is coaxial with the sleeve 42. One end of the pressure rod 41 is slidably inserted in the sleeve 42, and the spring 43 is placed in the sleeve 42 in a compressed state, and its two ends respectively abut against the end of the pressure rod 41 and the side wall of the box body 1.

[0031] The utility model protects the spring 43 by arranging the spring 43 in the sleeve 42 and the pressure rod 41, thereby solving the problem that the spring 43 becomes stuck and fails when soil particles enter the reinforced concrete box, resulting in the movable plate 2 being unable to reset itself. In actual use, grease can also be injected into the sleeve 42 to protect the spring 43 and prevent the spring 43 from rusting.

[0032] Specifically, the box body 1 includes a bottom plate 11, a top plate 12, a back plate 13 and two side plates 14. The two side plates 14 are vertically connected to both sides of the back plate 13. The bottom edges and top edges of the back plate 13 and the two side plates 14 are respectively connected to the three edges of the bottom plate 11 and the top plate 12 to form a box body 1 with an opening on one side. The back plate 13 is opposite to the opening of the box body 1.

[0033] Furthermore, the top plate 12 and the movable plate 2 are prefabricated with steel bars and concrete respectively, and the bottom plate 11, the back plate 13 and the two side plates 14 are prefabricated as a whole with steel bars and concrete. The top plate 12 is connected to the top of the back plate 13 and the two side plates 14 to form a reinforced concrete box 1 together with the bottom plate 11, the back plate 13 and the two side plates 14, which is easy to assemble.

[0034] Furthermore, the box body 1 is provided with a self-propelled anchor rod 5 connected to the bottom of the box body 1 by bolts. The self-propelled anchor rod 5 is driven into the depth of 300 cm below the local freezing line, which can prevent the roadbed soil from frost-heaving and causing the device to bulge together, and has an anti-pullout effect.

[0035] Furthermore, the side of the vertical plate 3 away from the movable plate 2 is arranged in a triangular tip structure, which is conducive to the spring group device 4 pushing the movable plate 2 and the vertical plate 3 to move toward the soil when the frozen soil melts, thereby reducing the resistance of the soil.

[0036] The movable plate 2 is pressed against the surface of the bottom plate 11 by gravity. Furthermore, a pulley 6 is provided at the bottom of the movable plate 2, and the pulley 6 is rollingly connected to the surface of the bottom plate 11, so that the bottom of the movable plate 2 and the surface of the bottom plate 11 are in rolling friction, which greatly reduces the resistance of the movable plate 2 and increases the sensitivity of the device to prevent frost heave and thaw settlement.

[0037] Furthermore, the back plate 13 is double-layered and the two layers are connected by bolts, thereby increasing the strength of the back plate 13 and preventing the back plate 13 from being broken by the pressure of the spring assembly 4 .

[0038] Furthermore, a rubber gasket 7 is pressed between the two layers of back panels 13 to form a certain buffer distance between the two layers of back panels 13, increase elasticity, and further prevent the back panels 13 from being broken by the pressure of the spring assembly device 4; the rubber gasket 7 is sleeved on the bolts used to connect the two layers of back panels 13, thereby fixing the rubber gasket 7.

[0039] Furthermore, the edges of the two side panels 14 facing each other are respectively provided with stop plates 8 extending in opposite directions to limit the movable panel 2 and prevent the movable panel 2 from falling out of the box body 1 and causing the device to fail; the edges of the two stop plates 8 respectively abut against the sides of the two vertical panels 3, thereby preventing soil particles from entering between the stop plates 8 and the movable panel 2 and causing the movable panel 2 to get stuck or entering the box body 1 from both sides and causing the movable panel 2 to be unable to reset itself.

[0040] Furthermore, the top edge of the movable plate 2 is in contact with the top plate 12, thereby preventing soil particles from entering the box body 1 from the top of the movable plate 2; the bottom edge of the movable plate 2 is connected to a retaining bar 9, and the bottom of the retaining bar 9 is in contact with the bottom plate 11, thereby preventing soil particles from entering the box body 1 from the bottom of the movable plate 2.

[0041] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include," "comprise," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations. The phrase "includes an element defined by..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0042] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A one-way anti-freeze heave and thaw settlement device for railway roadbed in seasonally frozen soil areas, characterized in that: The invention comprises a box body (1), a movable plate (2), a vertical plate (3) and a spring assembly device (4), wherein the box body (1) is open to one side, the movable plate (2) is parallel to the opening of the box body (1) and is slidably connected in the box body (1), the spring assembly device (4) is horizontally connected between the back of the movable plate (2) and the side wall of the box body (1) to push the movable plate (2) toward the opening direction of the box body (1), and the two vertical plates (3) are parallel to each other and are connected to the movable plate (2) perpendicularly. On the front of the movable plate (2), the spring assembly device (4) includes a pressure rod (41), a sleeve (42) and a spring (43), the sleeve (42) is connected to the side wall of the box (1), the pressure rod (41) is connected to the back of the movable plate (2) and is coaxial with the sleeve (42), one end of the pressure rod (41) is slidably inserted into the sleeve (42), and the spring (43) is placed in the sleeve (42) in a compressed state and its two ends are respectively in contact with the end of the pressure rod (41) and the side wall of the box (1).

2. The one-way anti-freeze heave and thaw settlement device for railway roadbed in seasonally frozen soil areas according to claim 1, characterized in that: The box body (1) comprises a bottom plate (11), a top plate (12), a back plate (13) and two side plates (14), the two side plates (14) being vertically connected to both sides of the back plate (13), the bottom edges and top edges of the back plate (13) and the two side plates (14) being respectively connected around the three edges of the bottom plate (11) and the top plate (12) to form a box body (1) with an opening on one side, and the back plate (13) being opposite to the opening of the box body (1).

3. The one-way anti-freeze heave and thaw settlement device for railway roadbed in seasonally frozen soil areas according to claim 2, characterized in that: The top plate (12) and the movable plate (2) are prefabricated from steel bars and concrete, respectively; the bottom plate (11), the back plate (13) and the two side plates (14) are prefabricated from steel bars and concrete as a whole; the top plate (12) is connected to the top of the back plate (13) and the two side plates (14) to form a reinforced concrete box (1) together with the bottom plate (11), the back plate (13) and the two side plates (14).

4. The one-way anti-freeze heave and thaw settlement device for railway roadbed in seasonally frozen soil areas according to claim 1, characterized in that: The box body (1) is provided with a self-propelled anchor rod (5) connected to the bottom of the box body (1) by bolts. The self-propelled anchor rod (5) is driven into the box body to a depth of 300 cm below the local freezing line.

5. The one-way anti-freeze heave and thaw settlement device for railway roadbed in seasonally frozen soil areas according to claim 1, characterized in that: The side of the vertical plate (3) away from the movable plate (2) is arranged in a triangular tip structure.

6. The one-way anti-freeze heave and thaw settlement device for railway roadbed in seasonally frozen soil areas according to claim 2, characterized in that: A pulley (6) is provided at the bottom of the movable plate (2), and the pulley (6) is rollingly connected to the surface of the bottom plate (11).

7. The one-way anti-freeze heave and thaw settlement device for railway roadbed in seasonally frozen soil areas according to claim 2, characterized in that: The back plate (13) is double-layered and the two layers are connected by bolts.

8. The one-way anti-freeze heave and thaw settlement device for railway roadbed in seasonally frozen soil areas according to claim 7, characterized in that: A rubber gasket (7) is pressed between the two layers of back plates (13), and the rubber gasket (7) is sleeved on the bolts used to connect the two layers of back plates (13).

9. The one-way anti-freeze heave and thaw settlement device for railway roadbed in seasonally frozen soil areas according to claim 2, characterized in that: The edges of the two side panels (14) facing each other are respectively provided with stop panels (8) extending towards each other, and the edges of the two stop panels (8) respectively abut against the sides of the two vertical panels (3).

10. The one-way anti-freeze heave and thaw settlement device for railway roadbed in seasonally frozen soil areas according to claim 6, characterized in that: The top edge of the movable plate (2) is in contact with the top plate (12), and the bottom edge of the movable plate (2) is connected to a retaining strip (9), and the bottom of the retaining strip (9) is in contact with the bottom plate (11).

Images