Existing embankment shoulder widening structure and railway embankment

Abstract

The invention relates to the technical field of roadbed engineering, and provides an existing embankment shoulder widening structure and a railway embankment, the existing embankment shoulder widening structure comprises an embankment step part, the embankment step part comprises multiple stages of embankment steps formed on an embankment slope, and the embankment step part is located on the outer side of a slope toe of a ballast bed; the plurality of step piles are vertically arranged in the embankment step part; the road shoulder widening structure is arranged on the outer side of the embankment step part, the road shoulder widening structure comprises multiple stages of geocell layers and interlayer connecting rods, the multiple stages of geocell layers are laid on the embankment step part, and the interlayer connecting rods are vertically arranged in the geocell layers; and one end of the interlayer connecting rod extends out of the lower part of the geocell layer so as to be inserted into a structure below the geocell layer. The existing embankment roadbed widening structure and the railway embankment are low in construction cost and high in structural strength, the road shoulder widening effect can be fully and effectively achieved, and the stability of the roadbed is not affected.

Description

Technical Field

[0001] The invention relates to the technical field of roadbed engineering, and in particular to an existing embankment roadbed widening structure and a railway embankment. Background Art

[0002] In order to solve the problem of line subsidence caused by embankment deformation, in order to ensure the track elevation and ensure the safety of train driving after the embankment has settled, the track is often raised by filling ballast, that is, supplementary ballast, and the line smoothness is adjusted in real time. This also causes the thickness of the railway track bed to continue to increase, and the ballast on both sides of the track bed will encroach on the shoulders of the existing embankment, resulting in insufficient shoulder width, making it impossible for maintenance and inspection personnel or machinery along the railway to operate normally. The shoulder width of the embankment section should be ensured to be no less than 0.8 meters.

[0003] Chinese patent application CN202320083045.4 provides an arched crown beam on the top of a railway embankment slope protection pile, which is longitudinally arranged at the top of the embankment slope and located on the outside of the roadbed; the arched crown beam is a continuous arch beam, the top of the continuous arch beam is a plane, the bottom of the continuous arch beam is a continuous crown beam arch bottom, and supports are provided between adjacent crown beam arch bottoms; and a combined beam-pile slope protection system is provided, including slope protection square piles and arched crown beams; the slope protection square piles are located below the arched crown beam and inside the embankment slope; the tops of the slope protection square piles are supported at the supports of the arched crown beam, so as to widen the railway shoulder by adding a combined structure of piles and crown beams.

[0004] However, widening the shoulder with a pile foundation cap beam is expensive and labor-intensive. On the other hand, the pile foundation cap beam is constructed based on the current embankment height after ballast filling and road lifting. If the subsequent embankment continues to settle and deform, the previously constructed pile foundation cap beam will not be able to fully and effectively widen the shoulder. In addition, the construction process of widening the roadbed with a pile foundation cap beam is characterized by many points, deep holes, a wide excavation range, and a large amount of concrete, which has a great impact on the roadbed. During the rainy season, digging holes will cause rainwater to penetrate into the bottom of the roadbed, which will further aggravate the impact on the stability of the roadbed. At the same time, the pile foundation is partially exposed to the outside, and wind and sun may reduce the structural strength. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a shoulder widening structure for an existing embankment. Compared with the prior art, it has low construction cost and high structural strength, can achieve a sufficient and effective shoulder widening effect, and does not affect the stability of the roadbed.

[0006] In order to solve the above technical problems, the present invention provides an existing embankment shoulder widening structure, comprising:

[0007] An embankment step portion, the embankment step portion comprising a plurality of embankment steps formed on the embankment slope, and the embankment step portion is located outside the slope foot of the ballast bed;

[0008] Step piles, a plurality of which are vertically arranged in the step portion of the embankment;

[0009] A shoulder widening structure, wherein the shoulder widening structure is arranged on the outer side of the embankment step portion, and the shoulder widening structure includes a multi-level geocell layer and interlayer connecting rods laid on the embankment step portion, wherein the interlayer connecting rods are vertically arranged in the geocell layer, and one end of the interlayer connecting rod extends from under the geocell layer for insertion into the structure below the geocell layer.

[0010] In some specific embodiments, multiple levels of the geocell layers are arranged corresponding to the multiple levels of the embankment steps, so that the outer sides of the multiple levels of the geocell layers together constitute a step structure extending from the toe of the embankment to the top of the embankment.

[0011] In some specific embodiments, the geocell layer includes a plurality of geocells arranged side by side, and the geocells are filled with coal gangue and liquid fly ash.

[0012] In some specific embodiments, the geocells of two adjacent geocell layers are arranged in a staggered manner.

[0013] In some specific embodiments, a plurality of the geocells are provided with the interlayer connecting rods.

[0014] In some specific embodiments, the geocell is a high-density polyethylene welded geocell, and the side length of the node spacing of the geocell is not less than 20 cm.

[0015] In some specific embodiments, the step depth of the embankment step is not less than 20 cm, and the height

[0016] No larger than 30cm.

[0017] In some specific embodiments, the outer circumference of the interlayer connecting rod is spiral, and the length of the interlayer connecting rod is not less than 10 cm.

[0018] In some specific embodiments, multiple levels of the embankment steps are provided with the step piles.

[0019] The present invention also provides a railway embankment, comprising the above-mentioned existing embankment shoulder widening structure, an embankment drainage ditch and a covering geocell, wherein the embankment drainage ditch is located on one side of the embankment slope foot, and a plurality of the covering geocells are sequentially laid above the embankment drainage ditch along the length extension direction of the embankment drainage ditch, and the covering geocells are respectively arranged on both sides of the embankment drainage ditch in the width direction, and two adjacent covering geocells located on both sides of the embankment drainage ditch in the width direction are detachably connected.

[0020] Through the above scheme, the beneficial effects of the present invention are as follows:

[0021] The present invention has an existing embankment shoulder widening structure, forms multiple embankment steps on the embankment slope, and vertically arranges step piles inside the embankment step part, so as to provide lateral constraints on the embankment step part, ensure the stability of the railway embankment, and reduce the impact of construction on the existing railway operation. A multi-level geocell layer is arranged on the embankment step part to achieve the shoulder width of the existing embankment, and is connected with the vertically arranged interlayer connecting rods to improve the integrity of the shoulder widening structure and provide lateral constraints. It has high structural strength and can achieve a sufficient and effective shoulder widening effect. The above structure is simple, easy to construct, and does not affect the stability of the roadbed.

[0022] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 It is a structural schematic diagram of a specific embodiment of the existing embankment shoulder widening structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the internal filling structure of the shoulder geocell;

[0026] Figure 3 This is a schematic diagram of a structure covering a geocell in a specific embodiment of a railway embankment of the present invention. Figure 1 ;

[0027] Figure 4 This is a schematic diagram of a structure covering a geocell in a specific embodiment of a railway embankment of the present invention. Figure 2 .

[0028] Description of Reference Numerals

[0029] Tag Name

[0030] 1. Ballast bed; 2. Existing embankment; 21. Embankment step; 21-1. Embankment step; 22. Embankment slope; 23. Embankment toe; 24. Embankment top; 3. Step piles; 4. Shoulder widening structure; 41. Geocell layer; 411. Shoulder geocell; 412. Coal gangue; 413. Liquid fly ash; 42. Interlayer connecting rod; 5. Embankment drainage ditch; 6. Covering geocell; 61. First layer of cells; 62. Second layer of cells; 63. Abutment; 7. Connecting plate; 8. First side plate; 9. Second side plate; 10. Rotating plate; 11. First auxiliary rod; 12. Second auxiliary rod; 13. Main rod; 14. First limit rod; 15. Second limit rod; 16. Limit ring. DETAILED DESCRIPTION

[0031] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and the protection scope of the present invention is not limited to the following specific embodiments.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "formed", "provided with", "set", "connected" and the like should be understood in a broad sense. For example, the connection can be a direct connection or an indirect connection through an intermediate medium, a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate connection member, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the above terms can be understood in the present invention according to the specific circumstances.

[0033] The specific meaning of .

[0034] In the present invention, unless otherwise specified, the directions or positional relationships indicated by the directional words "up", "down", "left", "right", "counterclockwise", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only used to facilitate the description of the present invention and simplify the description, rather than to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention; the directional terms of the present invention should be understood in conjunction with the actual installation state.

[0035] It should be noted that the present invention widens the shoulder on an existing embankment 2, and the existing embankment 2 may be a railway embankment or other forms of embankments. The present invention does not impose any specific restrictions on this. For the sake of convenience, the following description is combined with the application scenario where the existing embankment 2 is a railway embankment. Specifically, the present invention provides a shoulder widening structure for an existing embankment, see Figure 1, which includes an embankment step portion 21, step piles 3 and a shoulder widening structure 4, wherein the embankment step portion 21 includes a multi-level embankment step 21-1 formed on the embankment slope 22 of the existing embankment 2, and the embankment step portion 21 is located outside the slope foot of the roadbed 1, and a plurality of step piles 3 are vertically arranged in the embankment step portion 21, and the shoulder widening structure 4 is arranged outside the embankment step portion 21, and the shoulder widening structure 4 includes a multi-level geocell layer 41 and an interlayer connecting rod 42 laid on the embankment step portion 21, the interlayer connecting rod 42 is vertically arranged in the geocell layer 41, and one end of the interlayer connecting rod 42 extends from below the geocell layer 41 for insertion into the structure below the geocell layer 41.

[0036] Through the above basic scheme, a multi-level embankment step 21-1 is formed on the embankment slope 22, and a step pile 3 is vertically arranged inside the embankment step part 21, so as to provide lateral constraints on the embankment step part 21, ensure the stability of the existing embankment 2, and reduce the impact of construction on the existing railway operation; and a multi-level geocell layer 41 is arranged on the embankment step part 21, so as to widen the shoulder of the existing embankment 2, and cooperate with the vertically arranged interlayer connecting rod 42 to achieve the connection between the geocell layers 41 of different levels, and can be combined with the existing embankment 2 into a whole, so as to improve the integrity of the shoulder widening structure 4 and provide lateral constraints, have high structural strength, and can play a full and effective shoulder widening effect, and the above structure is simple and easy to construct, and the setting of the step pile 3 and the interlayer connecting rod 42 effectively ensures the stability of the existing roadbed 2, and at the same time, the two are not exposed to the outside and will not be affected by wind and sun, ensuring reliability in subsequent use. In addition, since the embankment step 21 that supports the shoulder widening structure 4 is in a step shape, the structural characteristics of the step piles can also reduce uneven settlement after widening, further ensuring reliability in subsequent use.

[0037] In some embodiments, see Figure 1 The multi-level geocell layer 41 is arranged corresponding to the multi-level embankment steps 21-1, so that the outer sides of the multi-level geocell layer 41 together form a step structure extending from the embankment foot 23 to the embankment top 24, so that the shoulder of the existing embankment 2 is widened and the free surface is stepped, so that the ballast can be dissipated during the falling and rolling process of the ballast, and when the embankment foot 23 of the existing embankment 2 is provided with an embankment drainage ditch 5, the damage to the embankment drainage ditch 5 after the ballast rolls can be greatly reduced. It should be noted that the above-mentioned multi-level geocell layer 41 takes the embankment foot 23 of the existing embankment 2 as the boundary line, does not reoccupy or requisition land, and can also maintain the use of existing embankment drainage ditch 5 and other facilities.

[0038] In some specific embodiments, the geocell layer 41 includes a plurality of shoulder geocells 411 arranged side by side, and in order to reduce the construction cost, see Figure 2 The shoulder geocell 411 is filled with coal gangue 412 and liquid fly ash 413, which can realize the solid waste recycling of coal gangue 412 and liquid fly ash 413. The shoulder geocell 411 can provide good lateral constraints for the coal gangue 412, and the liquid fly ash has good fluidity and stability, which can fill the gaps between the coal gangue 412 in each layer of the shoulder geocell 411, and the structure has light specific gravity, good density and high strength.

[0039] In some embodiments, see Figure 1 The shoulder geocells 411 of two adjacent geocell layers 41 are arranged in a staggered manner, thereby improving the overall structural stability between the multi-level geocell layers 41 and facilitating construction.

[0040] Further, see Figure 1 , several shoulder geocells 411 are provided with interlayer connecting rods 42, thereby improving the lateral constraint on the shoulder widening structure 4. When combined with the above-mentioned specific implementation method of staggered arrangement of the shoulder geocells 411 of the two adjacent geocell layers 41, the shoulder geocells 411 of the upper and lower adjacent geocell layers 41 can be staggered and combined, so that the integrity of the shoulder widening structure 4 is stronger; in addition, the shoulder geocells 411 of each level of geocell layer 41 close to the embankment step 21 can be combined with the corresponding embankment step 21-1 through the interlayer connecting rods 42, and each shoulder geocell 411 of the geocell layer 41 at the lowest level can be combined with the existing roadbed below through the interlayer connecting rods 42, thereby improving the degree of combination between the shoulder widening structure 4 and the existing roadbed 2, and ensuring the stability of the two during subsequent use.

[0041] In some embodiments, the particle size of the coal gangue 412 is 20-50 cm, and the density of the liquid fly ash 413 is 1.5-1.9 g / cm 3 , so as to be able to better fill into the shoulder geocell 411.

[0042] In some specific embodiments, the shoulder geocell 411 is a high-density polyethylene welded geocell, which is actually made of reinforced HDPE (high-density polyethylene) sheet material, a three-dimensional mesh cell structure formed by high-strength welding, and ultrasonic needle welding. It can provide good lateral restraint, and the node spacing side length of the shoulder geocell 411 is not less than 20 cm. In actual use, holes can be punched on the membrane of the shoulder geocell 411 according to engineering needs.

[0043] In some specific embodiments, the step depth of the embankment step 21 - 1 is not less than 20 cm and the height is not more than 30 cm, which is convenient for construction and ensures the stability of the shoulder widening structure 4 overlapped on the embankment step portion 21 .

[0044] In some specific embodiments, the outer circumference of the interlayer connecting rod 42 is spiral, so that it can be inserted into the existing embankment 2 and the geocell layer 41 by rotation, and the spiral outer circumference effectively improves the interlayer bonding force. At the same time, in order to ensure the reliability and stability of the interlayer connection, the length of the interlayer connecting rod 42 is not less than 10 cm.

[0045] In some embodiments, see Figure 1 The multi-level embankment steps 21-1 are all provided with step piles 3, thereby providing lateral constraints for each level of the embankment steps 21-1, further ensuring the stability of the existing embankment 2 and reducing the impact of the construction on the existing railway traffic.

[0046] In order to better understand the technical solution of the present invention, its construction process is described below in combination with relatively preferred technical features.

[0047] First, the embankment slope 22 of the existing embankment 2 is constructed to form an embankment step portion 21 composed of multiple embankment steps 21-1, and step piles 3 are arranged inside each embankment step 21-1 to provide lateral constraints on the embankment step portion 21, thereby ensuring the stability of the existing embankment 2 and reducing the impact of the construction on the existing railway operation.

[0048] Then, the geocell layer 41 is laid corresponding to the embankment step 21, so as to be laid upward in sequence from the embankment slope foot 23 to the embankment slope top 24 in the form of step piles, and the interlayer connecting rod 42 is vertically arranged in the geocell layer 41, and one end of the interlayer connecting plate rod 42 extends from below the geocell layer 41 to be inserted into the structure below the geocell layer 41, and the lower structure includes the geocell layer 41 and the existing embankment 2, thereby improving the integrity of the shoulder widening structure 4 and the combination stability of the shoulder widening structure 4 and the existing embankment 2, thereby realizing the shoulder widening of the existing embankment 2.

[0049] Through the above technical solution, the free surface of the shoulder widening structure 4 is stepped, and the ballast can be dissipated during the falling and rolling process, greatly reducing the damage to the embankment drainage ditch 5 after the ballast rolls. In addition, the geocell layer 41 is composed of a number of shoulder geocells 411 arranged side by side, which are filled with coal gangue 412 and liquid fly ash 413, realizing the solid waste recycling of the two, and the structure is simple and the construction is convenient; the shoulder geocell 411 can provide good lateral constraints for the coal gangue 412, and the good fluidity and stability of the liquid fly ash 413 enable it to fill the gaps between the coal gangue 412 inside each layer of the shoulder geocell 411, and the structure has a light specific gravity, good density and high strength. The setting of the step piles 3 and the interlayer connecting rods 42 effectively ensures the stability of the existing roadbed 2. At the same time, the two are not exposed to the outside and will not be affected by wind and sun, ensuring reliability during subsequent use. In addition, since the embankment step 21 that supports the shoulder widening structure 4 is in a step shape, the structural characteristics of the step piles can also reduce uneven settlement after widening, further ensuring reliability in subsequent use.

[0050] On the basis of the existing embankment shoulder widening structure mentioned in the above technical solution of the present invention, the present invention further provides a railway embankment, which includes the existing embankment shoulder widening structure mentioned in the present invention and an embankment drainage ditch 5 arranged on the side of the existing embankment shoulder widening structure. Specifically, the embankment drainage ditch 5 is located on one side of the embankment slope foot 23.

[0051] As a preferred embodiment, the railway embankment further comprises a plurality of covering geocells 6, which are sequentially laid above the embankment drainage ditch 5 along the length extension direction of the embankment drainage ditch 5. Furthermore, covering geocells 6 are respectively arranged on both sides of the embankment drainage ditch 5 in the width direction, and two adjacent covering geocells 6 located on both sides of the embankment drainage ditch 5 in the width direction are detachably connected.

[0052] As a preferred embodiment, Figure 3 As shown, the covering geocell 6 of this embodiment includes a first layer of cells 61 and a second layer of cells 62 arranged in sequence from top to bottom. The tensile strength of the second layer of cells 62 is greater than the tensile strength of the first layer of cells 61. By setting the covering geocell 6 as a double-layer structure, the covering geocell 6 will not become loose after long-term use, so that the covering geocell 6 maintains sufficient tension, thereby ensuring that the covering geocell 6 can still effectively support and cushion the fallen ballast after long-term service.

[0053] As a preferred embodiment, Figure 3As shown, the covering geocell 6 of this embodiment also includes a plurality of abutment members 63, and the upper and lower ends of the plurality of abutment members 63 abut against the center position of the first layer of cells 61 and the center position of the second layer of cells 62 respectively. Through the arrangement of the abutment members 61, a chord structure similar to the structure can be formed to lift up the first layer of cells 61 to form an inverted arch structure, thereby reserving a certain margin for the relaxation of the covering geocell 6. In addition, the inverted arch structure can also reduce the accumulation of ballast.

[0054] As a preferred embodiment, the detachable connection of the covering geocell 6 is adopted in the following manner: the above-mentioned railway embankment also includes a tensioning adjustment plate, and two adjacent covering geocells 6 are detachably connected through the tensioning adjustment plate, one end of the tensioning adjustment plate is set on one side of the embankment drainage ditch 5, and the other end of the tensioning adjustment plate is set on the other side of the embankment drainage ditch 5. When a blockage occurs somewhere in the embankment drainage ditch 5, the tensioning adjustment plate and the covering geocell 6 located at the blocked position can be separated, and the embankment drainage ditch 5 can be cleaned by removing the covering geocell 6 at the corresponding position, without removing all the covering geocells 6, making the cleaning work easier, and removing only one covering geocell 6 will not affect the tensioning force of other covering geocells 6, thereby greatly improving the embankment.

[0055] The service life of the gutter 5.

[0056] As a preferred embodiment, Figure 4 As shown, considering that the covering geocell 6 may be deformed and dented during long-term service, the ballast will accumulate in the dented position, causing ballast accumulation. In order to be able to adjust the tensioning force of the covering geocell 6 without removing the covering geocell 6, the tensioning adjustment plate of the preferred embodiment includes a connecting plate 7, a first side plate 8, a second side plate 9, a tensioning member and a locking member. The first side plate 8 is arranged on one side of the connecting plate 7, and the covering geocell 6 close to the first side plate 8 is hung on the first side plate 8, and the second side plate 9 is arranged on the other side of the connecting plate 7, and the covering geocell 6 close to the second side plate 9 is hung on the second side plate 9.

[0057] The tensioning member includes a rotating plate 10, a first sub-rod 11, a second sub-rod 12 and a main rod 13. The first sub-rod 11 is arranged on the first side plate 8 and is fixedly connected to the first side plate 8. The second sub-rod 12 is arranged on the second side plate 9 and is fixedly connected to the second side plate 9. The main rod 13 is arranged on the connecting plate 7 and is fixedly connected to the connecting plate 7. One end of the rotating plate 10 is rotatably connected to the first sub-rod 11, the other end of the rotating plate 10 is rotatably connected to the second sub-rod 12, and the middle part of the rotating plate 10 is rotatably connected to the main rod 13. The locking member includes a first limiting rod 14, a second limiting rod 15 and a limiting ring 16. The first limiting rod 14 is arranged on the first side plate 8 and is fixedly connected to the first side plate 8. The second limiting rod 15 is arranged on the connecting plate 7 It is fixedly connected to the connecting plate 7, one end of the limit ring 16 is rotatably connected to the first limit rod 14, and the other end of the limit ring 16 is sleeved on the second limit rod 15 and is detachably connected to the second limit rod 15. During the construction process, the other end of the limit ring 16 is not connected to the second limit rod 15. Under the action of the tensioning force of the covering geocell 6, the rotating plate 10 is perpendicular to the connecting plate 7, the first side plate 8 and the second side plate 9. When the covering geocell 6 is deformed, the limit ring 16 is pulled to make the rotating plate 10 rotate clockwise or counterclockwise, and the first side plate 8 and the second side plate 9 move toward the connecting plate 7, and the limit ring 16 is sleeved on the second limit rod 15, thereby realizing the re-tensioning of the covering geocell 6.

[0058] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0059] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0060] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. An existing embankment shoulder widening structure, characterized in that: include: An embankment step portion (21), the embankment step portion (21) comprising a plurality of embankment steps (21-1) formed on an embankment side slope (22), and the embankment step portion (21) is located outside the slope foot of the ballast bed (1); Step piles (3), a plurality of the step piles (3) are vertically arranged in the embankment step portion (21); A shoulder widening structure (4), the shoulder widening structure (4) being arranged outside the embankment step portion (21), and the shoulder widening structure (4) comprising a multi-stage geocell layer (41) laid on the embankment step portion (21) and an interlayer connecting rod (42), the interlayer connecting rod (42) being vertically arranged in the geocell layer (41), and one end of the interlayer connecting rod (42) extending from below the geocell layer (41) for being inserted into the structure below the geocell layer (41).

2. The existing embankment shoulder widening structure according to claim 1, characterized in that: The multiple levels of geocell layers (41) are arranged corresponding to the multiple levels of embankment steps (21-1), so that the outer sides of the multiple levels of geocell layers (41) together form a step structure extending from the embankment slope foot (23) to the embankment slope top (24).

3. The existing embankment shoulder widening structure according to claim 1, characterized in that: The geocell layer (41) comprises a plurality of road shoulder geocells (411) arranged side by side, and the road shoulder geocells (411) are filled with coal gangue (412) and liquid fly ash (413).

4. The existing embankment shoulder widening structure according to claim 3, characterized in that: The shoulder geocells (411) of two adjacent geocell layers (41) are arranged in a staggered manner.

5. The existing embankment shoulder widening structure according to claim 3, characterized in that: A plurality of the shoulder geocells (411) are each provided with the interlayer connecting rods (42).

6. The existing embankment shoulder widening structure according to claim 3, characterized in that: The shoulder geocell (411) is a high-density polyethylene welded geocell, and the side length of the node spacing of the shoulder geocell (411) is not less than 20 cm.

7. The existing embankment shoulder widening structure according to any one of claims 1 to 6, characterized in that: The embankment step (21-1) has a step depth of not less than 20 cm and a height of not more than 30 cm.

8. The existing embankment shoulder widening structure according to any one of claims 1 to 6, characterized in that: The outer circumference of the interlayer connecting rod (42) is spiral-shaped, and the length of the interlayer connecting rod (42) is not less than 10 cm.

9. The existing embankment shoulder widening structure according to any one of claims 1 to 6, characterized in that: The step piles (3) are arranged on multiple levels of the embankment steps (21-1).

10. A railway embankment, characterized in that: It comprises the existing embankment shoulder widening structure, embankment drainage ditch (5) and covering geocell (6) as described in claims 1 to 9, the embankment drainage ditch (5) is located on one side of the embankment slope foot (23), a plurality of covering geocells (6) are sequentially laid above the embankment drainage ditch (5) along the length extension direction of the embankment drainage ditch (5), and the covering geocells (6) are respectively arranged on both sides of the width direction of the embankment drainage ditch (5), and two adjacent covering geocells (6) located on both sides of the width direction of the embankment drainage ditch (5) are detachably connected.

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