FRP ballast retaining wall assembly structure

Abstract

The utility model provides a kind of FRP ballast retaining wall assembly structure, the structure includes support main body, bottom plate, several fixed rods and walkway plate, all components are made of glass fiber reinforced composite material.The support main body includes upper cavity and lower insert block, the bottom plate upper end both sides each are provided with at least two along vertical stacking arrangement The support main body, the lowermost The support main body is placed on The bottom plate by its lower insert block, the support main body in upper is inserted into the upper cavity of lower support main body by its lower insert block and is inserted into cooperation.The several fixed rods vertically penetrate the same side The all support main body and The bottom plate, and are anchored in foundation.The walkway plate is fixed on The top of the uppermost support main body.The utility model has the advantages of light weight, corrosion resistance, freeze-thaw resistance and convenient construction, and is suitable for high-altitude strong ultraviolet environment under railway subgrade protection.

Description

Technical Field

[0001] This utility model relates to the field of railway subgrade protection engineering technology, specifically to a retaining wall assembly structure made of glass fiber reinforced composite material (FRP). Background Technology

[0002] Ballast retaining walls, as a key structure for preventing ballast slippage and maintaining roadbed stability, are currently mainly made of concrete. However, they have some drawbacks in practical applications. Ordinary silicate concrete is heavy, requiring large equipment for transportation and hoisting in high-altitude or remote areas, resulting in high construction costs and low efficiency. Furthermore, concrete retaining walls are prone to cracking under temperature stress or external impact. Especially in environments like the Qinghai-Tibet Plateau, characterized by strong ultraviolet radiation, large temperature differences, and freeze-thaw cycles, concrete deterioration is accelerated. Another common type of retaining wall is the rubble masonry retaining wall, which offers some flexibility, but the strength of the rubble stones varies greatly, and the mortar layer, which acts as a bond, is susceptible to freeze-thaw damage, leading to poor overall masonry integrity and problems such as bulging or collapse. Additionally, the rough surface and high porosity of the rubble stones easily absorb dust and salt, accelerating material weathering. In high-altitude, strong ultraviolet environments, the cementitious materials in the mortar also experience performance degradation due to photo-oxidation, further reducing their service life.

[0003] To address the aforementioned issues, while some studies have proposed using steel structures or ordinary engineering plastic ballast retaining walls, steel structures suffer from corrosion and high maintenance costs, while ordinary plastics lack sufficient strength and impact resistance, making it difficult to meet the load and service life requirements of railways. Therefore, there is an urgent need for a new type of lightweight, corrosion-resistant, and rapidly assembleable ballast retaining wall structure. Utility Model Content

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] An FRP (fiberglass reinforced plastic) retaining wall assembly structure includes a supporting body, a base plate, several fixing rods, and a walkway panel, all components being made of glass fiber reinforced composite material. The supporting body includes an upper cavity and a lower insert block. At least two supporting bodies are provided on each of the upper sides of the base plate. Two adjacent supporting bodies are interlocked by the lower insert block of the upper supporting body inserting into the upper cavity of the lower supporting body. The fixing rods vertically penetrate all supporting bodies and the base plate on the same side and are fixed to the foundation to ensure the stability of the overall structure. The walkway panel is fixed to the top of the uppermost supporting body.

[0006] Preferably, two support bodies are provided on each of the upper sides of the base plate. The distance between the two L-shaped flanges of the support body is consistent with the width of the lower insertion block, ensuring a perfect fit during insertion and improving assembly accuracy and integrity. The base plate is laid on the bottom of the lower insertion block of the lowest support body to ensure that the left and right support bodies are at the same horizontal height and achieve uniform settlement.

[0007] Preferably, the top of the upper cavity is provided with an inwardly curved L-shaped flange, and the walkway plate is fixed on the L-shaped flange.

[0008] Preferably, the walkway slab is a three-hole walkway slab, with several grooves on its upper panel for anti-slip purposes. Slots and inserts are respectively provided on the opposite sides of the walkway slab. Two adjacent walkway slabs are horizontally joined by inserting the insert of one walkway slab into the slot of the other, facilitating quick on-site installation and adjustment.

[0009] Preferably, a plurality of drainage holes are provided on the side plates of both sides of the lower insert block, and the drainage holes are arranged along the longitudinal direction of the support body to prevent rainwater from accumulating and causing foundation settlement.

[0010] The beneficial effects of this utility model are:

[0011] This utility model adopts a standardized modular assembly design. The supporting main bodies are connected by plug-in joints, and fixed to the foundation by vertically penetrating all supporting main bodies and the base plate with fixing rods, which realizes rapid assembly and convenient and efficient installation.

[0012] Furthermore, this invention utilizes FRP (fiberglass reinforced plastic) material to construct the overall structure. This material has a low density, effectively reducing the self-weight of the retaining wall and solving the problems of difficult transportation and reliance on large hoisting equipment in high-altitude and remote mountainous areas. Simultaneously, FRP material possesses excellent tensile strength and impact resistance, compensating for the insufficient strength of ordinary engineering plastics and the tendency of concrete to crack. In addition, this invention exhibits corrosion resistance and environmental adaptability, effectively resisting the erosion caused by strong ultraviolet radiation, large temperature differences, and frequent freeze-thaw cycles in high-altitude regions, extending its service life and reducing overall life-cycle maintenance costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front view of the present invention; Figure 3 This is a three-dimensional structural diagram of the supporting body of this utility model; Figure 4 This is a front view of the supporting body of this utility model; Figure 5This is a schematic diagram of the structure of the fixing rod of this utility model; Figure 6 This is a schematic diagram of the walkway slab of this utility model.

[0014] In the diagram: 1. Support body; 11. Upper cavity; 111. L-shaped flange; 12. Lower insert block; 121. Drainage hole; 2. Base plate; 3. Fixing rod; 4. Walkway plate; 41. Groove; 42. Slot; 43. Insert block. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the embodiments and accompanying drawings.

[0016] like Figures 1 to 4 As shown, this utility model provides an FRP (fiberglass reinforced plastic) retaining wall assembly structure, including a supporting body 1, a base plate 2, several fixing rods 3, and a walkway 4. To adapt to the high-altitude, high-UV environment, the supporting body 1, base plate 2, fixing rods 3, and walkway 4 are all made of glass fiber reinforced polymer (GFRP), a material characterized by its lightweight, corrosion resistance, freeze-thaw resistance, and good insulation. The supporting body 1 includes an upper cavity 11 and a lower insert block 12. The top two side walls of the upper cavity 11 extend to form inwardly curved L-shaped flanges 111, which form a horizontal installation platform. The base plate 2 is laid horizontally on a compacted roadbed or foundation to ensure that the supporting bodies on both sides are at the same level, achieving uniform settlement. In this embodiment, preferably, two vertically stacked supporting bodies 1 are provided on each side of the upper end of the base plate 2, forming a double-layered retaining wall. During stacking, a "building block" interlocking method is used. The lowermost support body 1 has its lower insert 12 placed directly against the upper surface of the base plate 2. The upper support body 1 is inserted into the upper cavity 11 of the lower support body 1 through its lower insert 12. The outer contour of the lower insert 12 matches the inner contour of the upper cavity 11. This concave-convex fit structure effectively limits the horizontal relative displacement between the upper and lower layers, improving the overall stability of the wall. Several drainage holes 121 are provided on the side plates of the lower insert 12 of the support body 1. The drainage holes are arranged at intervals along the longitudinal direction of the support body. When rainwater seeps into the interior of the support body 1, it can be discharged in time through these drainage holes 121 to prevent rainwater accumulation and foundation settlement.

[0017] like Figure 2 and Figure 5As shown, the supporting body 1 and the base plate 2 have coaxial mounting holes (not shown in the figure) reserved at corresponding positions. The fixing rod 3 is formed into a smooth round bar by pultrusion process, and then machined into bolt sections and anchor sections. The anchor sections are driven into the foundation. The fixing rod 3 is inserted vertically and passes through all the supporting bodies 1 on the same side (from the top layer to the bottom layer) and the base plate 2 in sequence, and deeply anchors the anchor sections of the fixing rod 3 into the roadbed. The fixing rod 3 tightly locks the originally layered supporting bodies 1 and the base plate 2 into a rigid whole, ensuring that even if the bottom layer is placed directly on the base plate, it will not overturn or slip.

[0018] like Figure 2 and Figure 6 As shown, the walkway slab 4 is fixed to the top L-shaped flange of the upper cavity 11 by stainless steel bolts or rivets. The walkway slab 4 is preferably a three-hole walkway slab with several grooves 41 integrally formed on its upper surface to increase friction. To achieve continuous laying over long distances, the walkway slab 4 is designed with splicing structures at both ends: a slot 42 is provided on one edge, and an insert 43 is provided on the other edge. During installation, the insert 43 of the previous walkway slab 4 is inserted into the slot 42 of the next walkway slab 4, achieving a flat and seamless lateral splicing.

[0019] During installation, the foundation is first leveled and compacted, then the base plate 2 is laid, and the first layer of support body 1 is placed directly on the base plate 2. Next, the lower insert 12 of the second layer of support body 1 is inserted into the upper cavity 11 of the first layer. Then, fixing rods 3 are driven in, penetrating all support bodies 1 and the base plate 2 and anchored in the foundation. Walkway slabs 4 are laid on the L-shaped flange of the upper cavity 11 of the upper support body 1 and fixed with bolts. Finally, the transverse splicing of the walkway slabs 4 is completed. The entire process requires no large machinery, making construction convenient and efficient.

[0020] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. An FRP retaining wall assembly structure, comprising a supporting body (1), a base plate (2), several fixing rods (3), and a walkway plate (4), characterized in that: The supporting body (1) includes an upper cavity (11) and a lower insertion block (12); At least two supporting bodies (1) are provided on each side of the upper end of the base plate (2); The two adjacent support bodies (1) are inserted into the upper cavity (11) of the lower support body (1) through the lower insert block (12) of the upper support body (1); The plurality of fixed rods (3) vertically penetrate all the supporting bodies (1) and the base plate (2) on the same side and are fixed in the foundation; The walkway panel (4) is fixed to the top of the uppermost supporting body (1).

2. The FRP retaining wall assembly structure according to claim 1, characterized in that: Two supporting bodies (1) are provided on each side of the upper end of the base plate (2).

3. The FRP retaining wall assembly structure according to claim 1, characterized in that: The upper cavity (11) has an inwardly curved L-shaped flange (111) at the top, and the walkway plate (4) is fixed on the L-shaped flange (111).

4. The FRP retaining wall assembly structure according to claim 1, characterized in that: The walkway panel (4) is a three-hole walkway panel with several grooves (41) on its upper panel. The opposite sides of the walkway panel (4) are respectively provided with slots (42) and inserts (43). Two adjacent walkway panels (4) are horizontally spliced ​​by inserting the insert (43) of one walkway panel (4) into the slot (42) of the other walkway panel (4).

5. The FRP retaining wall assembly structure according to claim 1, characterized in that: The supporting body (1), the base plate (2), several fixing rods (3) and the walkway plate (4) are all made of glass fiber reinforced composite material.

6. The FRP retaining wall assembly structure according to claim 1, characterized in that: The lower insert (12) has several drainage holes (121) on its two side plates, and the drainage holes (121) are arranged along the longitudinal direction of the support body (1).

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