Four-way frost heaving and thaw settlement prevention device for railway roadbed in seasonal frozen soil region

Abstract

The four-way frost heaving and thaw collapse prevention device comprises a box body and four movable plates, the box body comprises a bottom plate, a top plate and a rectangular stand column, and the rectangular stand column is vertically arranged at the center position between the bottom plate and the top plate; the four movable plates are slidably connected between the bottom plate and the top plate in parallel with the four faces of the rectangular stand column respectively, and side plates perpendicular to the movable plates are arranged at the positions, located at the two ends of each movable plate, between the bottom plate and the top plate respectively. A spring set device is arranged between each movable plate and the rectangular stand column and used for pushing the movable plate in the direction away from the rectangular stand column along the side plates, two vertical plates which are parallel to each other and perpendicular to the movable plate are arranged on the face, back on to the rectangular stand column, of each movable plate, and each spring set device comprises a pressing rod, a sleeve and a spring. The spring is arranged in the sleeve and the pressing rod, the spring is protected, and the problem that when soil particles enter the reinforced concrete box body, the spring is clamped and loses efficacy is solved.

Description

Technical Field

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

[0002] my country's frozen soil can be divided into seasonal frozen soil and perennial frozen soil, of which seasonal frozen soil accounts for more than half of my country's territory, and perennial frozen soil accounts for 1 / 5 of the country's territory. In seasonal frozen soil areas, frozen soil disasters will cause uneven freezing and thawing of the roadbed surface, which will endanger driving safety in serious cases.

[0003] At present, the main measures for preventing and controlling frost damage in existing railway subgrades include: replacement method, physical and chemical method, drainage and water isolation method, and frost damage pad slope method. The replacement method is to replace the existing subgrade frost heaving soil with non-frost heaving soil such as coarse sand, gravel sand, sand and gravel. After replacement, the subgrade can be guaranteed not to frost heave. However, this method has a large working surface, a long time, many processes, and requires interruption of driving. It is rarely used in actual frost damage control projects. The physical and chemical method is to add certain substances (such as industrial salt) to the soil to change the interaction between soil particles and water, so that the water in the soil migrates and its freezing point changes, thereby weakening the frost heave of the soil. This method is simple to construct, but it needs to be operated every autumn, the cost is high, the maintenance time is not long, and it causes pollution and corrosion to the environment, rails and fasteners. The drainage and water-proofing method is a method to lower the groundwater level, reduce the soil moisture content within the seasonal thawing layer, cut off the water supply source and remove surface water. In actual application, this method is difficult to drain the water in the roadbed, and it cannot achieve the corresponding function for the frost damage in the road cutting section, so it cannot achieve satisfactory results. The frost damage pad slope method is to insert bamboo boards or rubber pads between the rails and the sleepers to follow the slope when the roadbed is frozen and heaving, and during the period of frost damage, the operation principle of padding as it is raised must be adhered to. When the frozen soil melts, the pads are withdrawn and followed the slope. During the period of frost damage, the operation principle of withdrawing as it falls must be adhered to. This method is repeated, and it is difficult to pad in place and withdraw to the bottom at one time. The workload is very large and time-consuming and labor-intensive.

[0004] To better solve the problem of existing subgrade frost damage in seasonal frozen soil areas, the invention patent with the patent number CN105926397B discloses a four-way decompression and self-resetting device for subgrade anti-freezing heave and thaw settlement, which is composed of a reinforced concrete box body, a reinforced concrete movable plate, a spring group device and a self-advancing anchor rod. This device has high strength and stiffness, and when buried in the subgrade, it can meet the requirements of the subgrade for bearing capacity and deformation. When the subgrade soil freezes and swells in winter, frost heave forces are generated in the soil. The frost heave forces push the movable plates in four directions to displace inward, releasing the frost heave forces in the subgrade, achieving the purpose of reducing or eliminating the frost heave amount of the subgrade, and at the same time, the spring group device stores energy. When the subgrade soil thaws in summer, the strength of the subgrade soil around the movable plate decreases and the stiffness weakens. The energy stored in the spring group device then pushes the movable plates in four directions in turn. The movable plates squeeze the subgrade soil in four directions respectively, which can increase the stiffness and density of the subgrade soil, achieving the purpose of reducing the thaw settlement amount of the subgrade soil. Repeating like this can reduce the harm of frost heave and thaw settlement of the subgrade soil.

[0005] However, the spring group device of this device is exposed in the reinforced concrete box body. When soil particles enter the reinforced concrete box body, it is easy to cause the spring group device to get stuck and fail. Utility Model Content

[0006] Aiming at the problems existing in the prior art, the purpose of the present utility model is to provide a four-way anti-freezing heave and thaw settlement device for railway subgrade in seasonal frozen soil areas.

[0007] To solve the above problems, the present utility model adopts the following technical solutions:

[0008] A four-way anti-freezing heave and thaw settlement device for railway subgrade in seasonal frozen soil areas includes a box body and four movable plates. The box body includes a bottom plate, a top plate and rectangular columns. The rectangular columns are vertically arranged at the central position between the bottom plate and the top plate. The four movable plates are respectively slidably connected between the bottom plate and the top plate parallel to the four faces of the rectangular columns. At both ends of each movable plate between the bottom plate and the top plate, there is a side plate perpendicular to the movable plate. A spring group device is arranged between each movable plate and the rectangular column to push the movable plate along the side plate in a direction away from the rectangular column. On the side of each movable plate facing away from the rectangular column, there are two vertical plates parallel to each other and perpendicular 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 rectangular column, the pressure rod is connected to the surface of the movable plate and is coaxial with the sleeve. One end of the pressure rod is slidably inserted into the sleeve, and the spring is placed in the sleeve in a compressed state and its two ends respectively abut against the end of the pressure rod and the side wall of the rectangular column.

[0009] Preferably, the bottom plate, the top plate, the rectangular columns, the side plates and the movable plates are respectively prefabricated and formed by steel bars and concrete. The bottom plate is connected to the top plate, the rectangular columns and the side plates through bolts to jointly form a reinforced concrete box body, and the movable plates are slidably connected in the box body.

[0010] Preferably, a self-advancing bolt connected to the bottom of the box body by bolts is provided on the box body, and the driving depth of the self-advancing bolt is 300 cm below the local freezing line.

[0011] Preferably, one side of the vertical plate away from the movable plate is arranged in a triangular tip structure.

[0012] Preferably, pulleys are provided at the bottom of the movable plate, and the pulleys are rollingly connected to the surface of the bottom plate.

[0013] Preferably, on one side edge of the two side plates at both ends of each movable plate facing each other, stop plates extending towards each other are respectively provided, and the edges of the two stop plates are respectively abutted and attached to the side surfaces of the two vertical plates on the movable plate.

[0014] Preferably, the top edge of each movable plate is attached to the top plate, a soil retaining strip is connected to the bottom edge of the movable plate, and the bottom of the soil retaining strip is attached to the bottom plate.

[0015] Advantages of the present utility model:

[0016] Compared with the prior art, the advantages of the present utility model are as follows:

[0017] By arranging the spring in the sleeve and the pressure rod, the present utility model protects the spring, thereby solving the problem that when soil particles enter the reinforced concrete box body, the spring is stuck and fails, resulting in the inability of the movable plate to self-reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present utility model;

[0019] Figure 2 is a transverse cross-sectional view of the present utility model;

[0020] Figure 3 is a longitudinal cross-sectional view of the present utility model;

[0021] Figure 4 is Figure 3 a partial enlarged view at A in

[0022] Figure 5 is a schematic layout diagram of the present utility model on the roadbed cross-section;

[0023] Figure 6 is a schematic layout diagram of the present utility model along the longitudinal direction of the roadbed. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0025] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "upper / lower end", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, terms such as "installed", "provided / sleeved with", "socketed", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0027] Please refer to Figures 1-6, the present utility model provides a technical solution: a four-way anti-freezing heaving and thawing settlement device for railway subgrade in seasonal frozen soil areas, which includes a box body 1 and four movable plates 2. The box body 1 includes a bottom plate 11, a top plate 12 and rectangular columns 13. The rectangular columns 13 are vertically arranged at the central position between the bottom plate 11 and the top plate 12. The four movable plates 2 are respectively slidably connected between the bottom plate 11 and the top plate 12 in parallel with the four faces of the rectangular columns 13. At both ends of each movable plate 2 between the bottom plate 11 and the top plate 12, there is provided a side plate 14 perpendicular to the movable plate 2. A spring group device 4 is provided between each movable plate 2 and the rectangular column 13 to push the movable plate 2 along the side plate 14 away from the rectangular column 13. On the side of each movable plate 2 facing away from the rectangular column 13, there are provided two vertical plates 3 that are parallel to each other and perpendicular 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 rectangular column 13. The pressure rod 41 is connected to the surface 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 the sleeve 42 in a compressed state and its two ends are respectively abutted against the end of the pressure rod 41 and the side wall of the rectangular column 13.

[0028] In the present utility model, by arranging the spring 43 in the sleeve 42 and the pressure rod 41, the spring 43 is protected, thus solving the problem that when soil particles enter the reinforced concrete box body, the spring 43 is stuck and fails, resulting in the inability of the movable plate 2 to self-reset. And during actual use, grease can also be injected into the sleeve 42 to protect the spring 43 and prevent the spring 43 from rusting.

[0029] Furthermore, the bottom plate 11, the top plate 12, the rectangular columns 13, the side plates 14 and the movable plates 2 are respectively prefabricated from steel bars and concrete. The bottom plate 11, the top plate 12, the rectangular columns 13 and the side plates 14 are connected to each other by bolts to jointly form the box body 1 of reinforced concrete. The movable plates 2 are slidably connected in the box body 1, which is convenient for assembly.

[0030] Furthermore, a self-advancing anchor rod 5 is provided on the box body 1 and is connected to the bottom of the box body 1 by bolts. The driving depth of the self-advancing anchor rod 5 is 300 cm below the local freezing line, which can prevent the device from being lifted together when the subgrade soil freezes and swells, and has the function of anti-pulling.

[0031] Furthermore, the side of the vertical plate 3 away from the movable plate 2 is arranged in a triangular tip structure, which is beneficial to the spring group device 4 pushing the movable plate 2 and the vertical plate 3 towards the soil when the frozen soil melts, and reduces the resistance of the soil.

[0032] The movable plate 2 is pressed against the surface of the bottom plate 11 by gravity. Further, a pulley 6 is provided at the bottom of the movable plate 2, and the pulley 6 is in rolling connection with 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, greatly reducing the resistance of the movable plate 2 and increasing the sensitive performance of the device for preventing frost heaving and thaw settlement.

[0033] Further, on the side edges facing each other of the two side plates 14 at both ends of each movable plate 2, stop plates 8 extending towards each other are respectively provided to limit the movable plate 2 and prevent the movable plate 2 from slipping out of the box body 1 and causing the device to fail; the edges of the two stop plates 8 respectively abut and fit against the side surfaces of the two vertical plates 3 on the movable plate 2, thereby preventing soil particles from entering between the stop plate 8 and the movable plate 2 and causing the movable plate 2 to get stuck or enter the box body 1 from both sides, resulting in the movable plate 2 being unable to self-reset.

[0034] Further, the top edge of each 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; a soil retaining strip 9 is connected to the bottom edge of the movable plate 2, and the bottom of the soil retaining strip 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.

[0035] It should be noted that in this article, relational terms such as first and second are only used 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 term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation. An element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0036] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A four-way anti-freeze expansion and thawing device for railway roadbed in seasonal frozen soil areas, characterized in that: The invention comprises a box body (1) and four movable plates (2), wherein the box body (1) comprises a bottom plate (11), a top plate (12) and a rectangular column (13), wherein the rectangular column (13) is vertically arranged at the center position between the bottom plate (11) and the top plate (12), and the four movable plates (2) are respectively slidably connected between the bottom plate (11) and the top plate (12) in parallel with four surfaces of the rectangular column (13), and a side plate (14) perpendicular to the movable plate (2) is arranged at each end of each movable plate (2) between the bottom plate (11) and the top plate (12), and a spring group device (4) is arranged between each movable plate (2) and the rectangular column (13) for moving the movable plate (2) along the side. The plate (14) is pushed in a direction away from the rectangular column (13); two vertical plates (3) parallel to each other and perpendicular to the movable plate (2) are arranged on a surface of each movable plate (2) facing away from the rectangular column (13); the spring assembly device (4) comprises a pressure rod (41), a sleeve (42) and a spring (43); the sleeve (42) is connected to the side wall of the rectangular column (13); the pressure rod (41) is connected to the surface 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 the sleeve (42) in a compressed state and its two ends are respectively abutted against the end of the pressure rod (41) and the side wall of the rectangular column (13).

2. The four-way anti-freezing and thawing device for railway roadbed in seasonally frozen soil areas according to claim 1 is characterized in that: The bottom plate (11), the top plate (12), the rectangular columns (13), the side plates (14), and the movable plate (2) are respectively prefabricated from steel bars and concrete. The bottom plate (11), the top plate (12), the rectangular columns (13), and the side plates (14) are connected to each other by bolts to form a reinforced concrete box body (1). The movable plate (2) is slidably connected in the box body (1).

3. The four-way anti-freezing and thawing 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 means of bolts. The self-propelled anchor rod (5) is driven into the box body to a depth of 300 cm below the local freezing line.

4. The four-way anti-freezing and thawing 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.

5. The four-way anti-freezing and thawing device for railway roadbed in seasonally frozen soil areas according to claim 1, 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).

6. The four-way anti-freezing and thawing device for railway roadbed in seasonally frozen soil areas according to claim 1, characterized in that: The edges of the two side panels (14) facing each other at both ends of each movable panel (2) 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) on the movable panel (2).

7. The four-way anti-freezing and thawing device for railway roadbed in seasonally frozen soil areas according to claim 5, characterized in that: The top edge of each movable plate (2) is in contact with the top plate (12), 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).

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