Bidirectional frost heaving and thaw settlement prevention device for railway bed in seasonal permafrost region

Abstract

The bidirectional frost heaving and thaw collapse prevention device comprises two groups of unidirectional frost heaving and thaw collapse prevention devices, each group of unidirectional frost heaving and thaw collapse prevention devices comprises a box body, a movable plate, a vertical plate and a spring group device, the box body is provided with an opening towards one side, the movable plate is parallel to the opening of the box body and is connected in the box body in a sliding manner, and the vertical plate is connected in the box body in a sliding manner. The spring set device is transversely connected between the back face of the movable plate and the side wall 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 of being perpendicular to the movable plate, the spring set device comprises a pressing rod, a sleeve and a spring, the sleeve is connected to the side wall of the box body, and the pressing rod is connected to the back face of the movable plate and is coaxial with 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 and is protected, so that 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 bidirectional 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 areas, the invention patent with patent number CN105951553B discloses an existing roadbed anti-freezing damage device that can achieve bidirectional decompression and self-resetting. 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 soil, it can meet the roadbed's requirements for its bearing capacity and deformation. When the roadbed soil frosts and heaves in winter, a frost heave force is generated. The frost heave force pushes the movable plates on both sides to cause horizontal displacement, releasing the frost heave force in the roadbed, thereby reducing or eliminating the amount of frost heave of the roadbed. At the same time, the spring group device stores energy. When the roadbed soil melts in summer, the stiffness of the surrounding soil decreases. The energy stored in the spring group device in turn pushes the movable plates on both sides to squeeze the roadbed soil in two directions, increasing the stiffness of the soil and reducing the amount of thaw settlement. Repeating this process 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 bidirectional 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 bidirectional anti-freezing and thawing device for railway roadbed in seasonal frozen soil areas includes two groups of unidirectional anti-freezing and thawing devices, each group of unidirectional anti-freezing and thawing devices 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 for pushing 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 the movable plate, 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 are respectively abutted against the end of the pressure rod and the side wall of the box body, the boxes of the two groups of unidirectional anti-freezing and thawing devices are integrated with each other and the openings are arranged back to back.

[0009] Preferably, the box body includes a bottom plate, a top plate, a back plate and two side plates, the two side plates are respectively 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, the back plate is opposite to the opening of the box body, the box bodies of the two groups of one-way anti-freeze heaving and thawing devices share a back plate, the bottom plates of the two groups of one-way anti-freeze heaving and thawing devices are integrated with each other, the top plates of the two groups of one-way anti-freeze heaving and thawing devices are integrated with each other, and the side plates of the two groups of one-way anti-freeze heaving and thawing devices located on the same side of the back plate are respectively integrated with each other.

[0010] Preferably, the top plates of the two sets of one-way anti-frost heaving and thawing devices are prefabricated as a whole by steel bars and concrete, the movable plates of the two sets of one-way anti-frost heaving and thawing devices are prefabricated as a whole by steel bars and concrete respectively, and the bottom plates, back plates and two side plates of the two sets of one-way anti-frost heaving and thawing devices are prefabricated as a whole by steel bars and concrete.

[0011] Preferably, the box of each set of one-way anti-freeze heave and thaw settlement devices is provided with a self-propelled anchor rod connected to the bottom of the box by bolts, and the self-propelled anchor rod is driven into the box to a depth of 300 cm below the local freezing line.

[0012] Preferably, the vertical plate of each set of one-way anti-freezing and thawing devices is arranged in a triangular tip structure on a side away from the movable plate.

[0013] Preferably, a pulley is provided at the bottom of the movable plate of each set of one-way anti-freeze heave and thaw settlement devices, and the pulley is rollingly connected to the surface of the bottom plate.

[0014] Preferably, a reinforcing plate is provided on each side of the back plate, the reinforcing plates are arranged parallel to the surface of the back plate, and the two reinforcing plates are connected to the back plate by bolts respectively.

[0015] Preferably, rubber washers are respectively pressed between the two reinforcing plates and the back plate, and the rubber washers are sleeved on the bolts used to connect the reinforcing plates and the back plate.

[0016] Preferably, the edges of the facing sides of the two side plates of each set of one-way anti-freeze heave and thaw settlement devices are respectively provided with stop plates extending towards each other, and the edges of the two stop plates are respectively in contact with the sides of the two vertical plates.

[0017] Preferably, the top edge of the movable plate of each set of one-way anti-freeze heave and thaw settlement devices is in contact with the top plate, the bottom edge of the movable plate is connected to a retaining bar, and the bottom of the retaining bar 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 bidirectional anti-freeze heaving and thawing device for railway roadbed in seasonal frozen soil areas, including two sets of unidirectional anti-freeze heaving and thawing devices, each set of unidirectional anti-freeze heaving and thawing devices includes 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 in 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 to push the movable plate 2 toward the opening direction of the box body 1, and the two vertical plates are connected. 3 are parallel to each other and are connected to the front of the movable plate 2 at right angles to each other. 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 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. The spring 43 is placed in a compressed state in the sleeve 42 and its two ends are respectively in contact with the end of the pressure rod 41 and the side wall of the box body 1. The box body 1 of the two sets of one-way anti-freezing and thawing devices is integrated with each other and the openings are arranged back to back.

[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, and the two side plates 14 are respectively vertically connected to both sides of the back plate 13, and the bottom edges and top edges of the back plate 13 and the two side plates 14 are 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 is opposite to the opening of the box body 1. The box body 1 of the two groups of one-way anti-freeze heaving and thawing devices shares a back plate 13, and the bottom plates 11 of the two groups of one-way anti-freeze heaving and thawing devices are integrated with each other, and the top plates 12 of the two groups of one-way anti-freeze heaving and thawing devices are integrated with each other, and the side plates 14 of the two groups of one-way anti-freeze heaving and thawing devices located on the same side of the back plate 13 are respectively integrated with each other, thereby enhancing the integrity between the two groups of one-way anti-freeze heaving and thawing devices and ensuring the stability of the structure of the box body 1.

[0033] Furthermore, the top plates 12 of the two sets of one-way anti-freeze heaving and thawing devices are prefabricated as a whole by steel bars and concrete, the movable plates 2 of the two sets of one-way anti-freeze heaving and thawing devices are prefabricated as a whole by steel bars and concrete respectively, and the bottom plates 11, back plates 13 and two side plates 14 of the two sets of one-way anti-freeze heaving and thawing devices are prefabricated as a whole by steel bars and concrete, which is convenient for assembly.

[0034] Furthermore, each set of one-way anti-freeze heave and thaw settlement devices 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 device from rising together when the roadbed soil freezes and heaves, and has an anti-pullout effect.

[0035] Furthermore, the vertical plate 3 of each set of one-way anti-freeze heave and thaw settlement devices is arranged in a triangular tip structure on the side away from the movable plate 2, 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 of each set of one-way anti-freeze heaving and thawing devices. 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 anti-freeze heaving and thawing.

[0037] Furthermore, a reinforcing plate 131 is provided on both sides of the back plate 13, and the reinforcing plates 131 are arranged parallel to the surface of the back plate 13. The two reinforcing plates 131 are respectively connected to the back plate 13 by bolts, so that the reinforcing plates 131 are in contact with the spring group device 4 to bear pressure, thereby increasing the strength of the back plate 13 and preventing the back plate 13 from being broken by the pressure of the spring group device 4.

[0038] Furthermore, rubber washers 7 are respectively pressed between the two reinforcing plates 131 and the back plate 13, so that a certain buffer distance is formed between the reinforcing plates 131 and the back plate 13, thereby increasing elasticity and further preventing the reinforcing plates 131 from being broken by the pressure of the spring group device 4; the rubber washers 7 are sleeved on the bolts used to connect the reinforcing plates 131 and the back plate 13, thereby fixing the rubber washers 7.

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

[0040] Furthermore, the top edge of the movable plate 2 of each set of one-way anti-freeze heave and thaw settlement devices 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 bidirectional anti-freeze heave and thaw settlement device for railway roadbed in seasonally frozen soil areas, characterized in that: The invention comprises two sets of one-way anti-freezing and thawing devices, each set of one-way anti-freezing and thawing devices comprises a box body (1), a movable plate (2), a vertical plate (3) and a spring assembly 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 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), the two vertical plates (3) are parallel to each other and are connected to the movable plate (2) perpendicularly to each other. On the front of 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 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 the two ends are respectively in contact with the end of the pressure rod (41) and the side wall of the box body (1), and the boxes (1) of the two sets of one-way anti-freezing and thawing devices are integrated with each other and the openings are arranged back to back.

2. The bidirectional 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) includes a bottom plate (11), a top plate (12), a back plate (13) and two side plates (14), the two side plates (14) are respectively 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 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, the back plate (13) is opposite to the opening of the box body (1), the box bodies (1) of the two sets of one-way anti-freeze heaving and thawing devices share a back plate (13), the bottom plates (11) of the two sets of one-way anti-freeze heaving and thawing devices are integrated with each other, the top plates (12) of the two sets of one-way anti-freeze heaving and thawing devices are integrated with each other, and the side plates (14) of the two sets of one-way anti-freeze heaving and thawing devices located on the same side of the back plate (13) are respectively integrated with each other.

3. The bidirectional anti-freeze heave and thaw settlement device for railway roadbed in seasonally frozen soil areas according to claim 2, characterized in that: The top plates (12) of the two sets of one-way anti-freeze heaving and thawing devices are prefabricated as a whole by steel bars and concrete, the movable plates (2) of the two sets of one-way anti-freeze heaving and thawing devices are prefabricated as a whole by steel bars and concrete, and the bottom plates (11), back plates (13) and two side plates (14) of the two sets of one-way anti-freeze heaving and thawing devices are prefabricated as a whole by steel bars and concrete.

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

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

6. The bidirectional 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) of each set of one-way anti-freeze heave and thaw sinking devices, and the pulley (6) is rollingly connected to the surface of the bottom plate (11).

7. The bidirectional anti-freeze heave and thaw settlement device for railway roadbed in seasonally frozen soil areas according to claim 2, characterized in that: A reinforcing plate (131) is provided on each side of the back plate (13), the reinforcing plates (131) are arranged parallel to the surface of the back plate (13), and the two reinforcing plates (131) are connected to the back plate (13) by bolts.

8. The bidirectional anti-freeze heave and thaw settlement device for railway roadbed in seasonally frozen soil areas according to claim 7, characterized in that: Rubber washers (7) are respectively pressed between the two reinforcing plates (131) and the back plate (13), and the rubber washers (7) are sleeved on the bolts used to connect the reinforcing plates (131) and the back plate (13).

9. The bidirectional 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 plates (14) facing each other of each set of one-way anti-freeze heave and thaw sinking devices are respectively provided with stop plates (8) extending towards each other, and the edges of the two stop plates (8) are respectively abutted against the sides of the two vertical plates (3).

10. The bidirectional 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) of each set of one-way anti-freeze heave and thaw sinking devices is in contact with the top plate (12), and 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).

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