UHPC light side ditch cover plate

Abstract

The utility model relates to the technical field of constructional engineering, and provides a UHPC light side ditch cover plate which comprises a UHPC panel, a wave-shaped stiffening rib and a plurality of adjustable supporting bases, the UHPC panel comprises an anti-skid layer, a force bearing layer and an anti-crack layer which are arranged from top to bottom, the wave-shaped stiffening rib is arranged at the bottom of the UHPC panel, and the anti-skid layer is arranged at the bottom of the UHPC panel. The wave-shaped stiffening ribs comprise wave-shaped continuous structures arranged on the two sides of the UHPC panel in the length direction, a plurality of straight panel connecting ribs are connected between the two wave-shaped continuous structures, and the multiple supporting bases are arranged at the bottom of the cover plate and used for adjusting the height of the cover plate. According to the scheme, the problems that a traditional side ditch cover plate is large in dead weight, high in maintenance cost and the like are solved, remarkable technical advantages are formed in the aspects of safety, durability, economical efficiency and the like, construction is facilitated, and good application prospects are achieved.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, specifically to a UHPC lightweight ditch cover. Background Technology

[0002] As a crucial component of drainage systems in municipal roads and highways, roadside ditch covers must withstand multiple stresses, including vehicle loads, environmental corrosion, and temperature stress. Currently, most roadside ditch covers are made of ordinary concrete, resulting in a heavy structure with a single cover weighing approximately 226 kg. This makes installation and transportation inconvenient. Ordinary concrete covers often use low-grade concrete, making them prone to chipping and damage during transportation and installation. They are also susceptible to bending deformation under repeated pressure from heavy vehicles. Furthermore, ordinary concrete has poor durability, especially in winter when de-icing agents are used extensively, leading to concrete spalling, steel corrosion, and a shorter service life. Additionally, their poor surface anti-slip properties increase the risk of skidding accidents in rainy or snowy weather.

[0003] Ultra-high performance concrete (UHPC) is a new type of cement-based composite material with ultra-high strength, high durability, and good workability. UHPC's compressive strength is far greater than that of ordinary concrete. Furthermore, UHPC exhibits excellent impermeability, frost resistance, and chemical resistance, effectively resisting the intrusion of harmful external substances and resulting in a long service life. More importantly, in its freshly mixed state, UHPC possesses good fluidity and filling properties, allowing it to be compacted and formed with little or no vibration, making it suitable for the fabrication of complex-shaped components.

[0004] Therefore, as a high-performance building material, UHPC can be used to develop a UHPC trench cover that integrates high strength, crack resistance, anti-slip properties, and intelligent leveling, thereby breaking through the application bottlenecks of traditional technologies. Utility Model Content

[0005] To address the problems existing in the background technology, this utility model proposes a UHPC lightweight ditch cover, which solves the problems of heavy weight and high maintenance cost of traditional ditch covers. It has significant technical advantages in terms of safety, durability, and economy, and is also easy to construct, showing good application prospects.

[0006] To achieve the above objectives, the present invention adopts the following solution: a UHPC lightweight side ditch cover, comprising a UHPC panel, corrugated stiffening ribs, and multiple adjustable support bases. The UHPC panel includes an anti-slip layer, a load-bearing layer, and a crack-resistant layer arranged from top to bottom. The corrugated stiffening ribs are disposed at the bottom of the UHPC panel. Each corrugated stiffening rib includes a continuous corrugated structure arranged on both sides along the length of the UHPC panel. Multiple straight plate connecting ribs connect two corrugated continuous structures. Multiple support bases are disposed at the bottom of the corrugated stiffening ribs to adjust the height of the cover.

[0007] Optionally, the anti-slip layer is a UHPC layer incorporating 0.5-1mm diamond aggregate; the load-bearing layer is a UHPC layer incorporating stainless steel fiber and organic fiber; and the crack-resistant layer is a UHPC layer with pre-embedded glass fiber mesh.

[0008] Optionally, a triangular transition zone is provided at the connection between the wave-shaped stiffening rib and the UHPC panel.

[0009] Optionally, the wave-shaped continuous structure, the straight plate connecting ribs, and the triangular transition zone are all made of UHPC material.

[0010] Optionally, the wave-shaped continuous structure is vertically connected to the UHPC panel. The opposite sides of the wave-shaped continuous structure are wave-shaped surfaces with a wavelength of 150mm±5% and a wave height of 30mm±5%, and the waveform profile is a sinusoidal curve. The bottom surface of the wave-shaped continuous structure is set as a horizontal plane, and its thickness gradually decreases from top to bottom.

[0011] Optionally, the support base includes a steel sleeve pre-embedded in the triangular transition area or the bottom of the wave-shaped stiffening rib, the steel sleeve being internally threaded with an adjusting screw, and the bottom of the adjusting screw being fixed with a rubber support with anti-slip texture.

[0012] The beneficial effects of this utility model are as follows: This solution solves the problems of heavy weight and high maintenance cost of traditional side ditch covers by using UHPC panels, corrugated stiffening ribs and multiple support bases. It has significant technical advantages in terms of safety, durability and economy. Moreover, its lightweight nature facilitates construction and has good application prospects.

[0013] First, the UHPC panel employs a layered structural design to optimize material distribution. This gradient design balances functionality and economy, avoiding material redundancy, reducing the amount of high-cost steel fibers, and ensuring a lightweight overall structure. Second, the corrugated stiffening ribs, through geometric optimization, significantly improve structural stiffness and bending resistance without increasing material usage. When combined with the UHPC panel, the corrugated stiffening ribs form a hollow cross-section, significantly reducing self-weight. Furthermore, the height of the support base is adjustable to adapt to unevenness on different mounting surfaces, ensuring the levelness and stability of the cover plate installation.

[0014] In addition, the cover plates are all made of UHPC material. The high density and impermeability of UHPC material greatly delay the corrosion of steel bars and have a long design life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of this utility model.

[0018] The following are the labels in the diagram: 1. UHPC panel; 2. Wave-shaped stiffening rib; 201. Wave-shaped continuous structure; 3. Support base; 301. Adjusting screw; 302. Rubber support; 4. Straight plate connecting rib; 5. Triangular transition area. Detailed Implementation

[0019] To make this utility model clearer and more understandable, the following description, in conjunction with the accompanying drawings and embodiments, will provide a more detailed explanation of this utility model. It should be understood that the given embodiments are merely one implementation method and do not represent all embodiments.

[0020] Example 1

[0021] Combination Figures 1-3 This embodiment provides a UHPC lightweight side ditch cover, including a UHPC panel 1, corrugated stiffening ribs 2, and multiple adjustable support bases 3. The UHPC panel 1 includes an anti-slip layer, a load-bearing layer, and a crack-resistant layer arranged from top to bottom. The corrugated stiffening ribs 2 are disposed at the bottom of the UHPC panel 1. The corrugated stiffening ribs 2 include corrugated continuous structures 201 arranged on both sides along the length direction of the UHPC panel 1. Multiple straight plate connecting ribs 4 are connected between two corrugated continuous structures 201. Multiple support bases 3 are disposed at the bottom of the corrugated stiffening ribs 2 to adjust the height of the cover.

[0022] In this embodiment, a triangular transition zone 5 is provided at the connection between the corrugated stiffening rib 2 and the UHPC panel 1. The corrugated continuous structure 201, the straight connecting rib 4, and the triangular transition zone 5 are all made of UHPC material. The cover plate is cast using UHPC material, which has ultra-high strength and excellent durability. Compared with ordinary concrete, the thickness of the cover plate can be significantly reduced, achieving lightweighting. The triangular transition zone 5 eliminates stress abrupt changes at the connection between the UHPC panel 1 and the corrugated stiffening rib 2, avoiding the risk of interface cracking. Specifically, it is located at the edge of the connection between the corrugated stiffening rib 2 and the UHPC panel 1 on both sides. The straight connecting rib 4 forms a hollow support system between the two corrugated continuous structures 201, reducing the amount of intermediate filling material and forming a lightweight, high-strength rib-plate combination structure. It should be noted that the straight connecting rib 4 shown in the accompanying drawings of this embodiment is located in the middle and at both ends of the two corrugated continuous structures 201. Several straight connecting ribs 4 can be added according to the actual length requirements of the cover plate, and are not limited to those shown in the accompanying drawings.

[0023] UHPC panel 1 employs a layered structure design to optimize material distribution. Specifically, the anti-slip layer is a 1cm thick UHPC layer incorporating 0.5-1mm diamond aggregate, enhancing anti-slip safety in rainy and snowy weather. The load-bearing layer is a 1.5cm thick UHPC layer incorporating stainless steel and organic fibers. The synergistic effect of high-strength metal fibers dominating load transfer and organic fibers inhibiting early cracking improves the tensile strength and durability of the cover plate. The crack-resistant layer is a 1.5cm thick UHPC layer with pre-embedded glass fiber mesh, inhibiting the propagation of microcracks and comprehensively improving bending and tensile performance. This gradient design balances functionality and economy, reducing the amount of high-cost steel fibers while ensuring a lightweight overall structure.

[0024] Specifically, the wave-shaped continuous structure 201 is vertically connected to the UHPC panel 1. The opposite sides of the wave-shaped continuous structure 201 are wave-shaped surfaces with a wavelength of 150mm ± 5% and a wave height of 30mm ± 5%, and its waveform profile is a sinusoidal curve. The bottom surface of the wave-shaped continuous structure 201 is horizontal. In this example, the UHPC panel 1 covers the wave-shaped continuous structure 201. The cover plate, through its wave-shaped continuous structure, enhances the structural load-bearing capacity and seismic performance, strengthens stiffness and buckling resistance, and improves torsional and shear resistance, effectively reducing the plate thickness and achieving significant weight reduction. In this embodiment, the wave-shaped continuous structure 201 has a gradually decreasing thickness distribution from top to bottom. The thicker top and thinner bottom cross-section design enhances the load-bearing capacity at the top, while the gradually decreasing bottom reduces local stress concentration, improving overall compressive strength. The decreasing structure also reduces the amount of material used at the bottom, further reducing the self-weight of the cover plate. In this embodiment, the self-weight of the cover plate is approximately 60 kg, which is about 70% lower than that of a regular concrete cover plate (approximately 226 kg).

[0025] Specifically, the support base 3 includes a steel sleeve pre-embedded in the triangular transition area 5 or the bottom of the corrugated stiffening rib 2. An adjusting screw 301 is internally threaded onto the steel sleeve. A rubber support 302 with anti-slip texture is fixed to the bottom of the adjusting screw 301. The adjusting range of the adjusting screw 301 is ±2cm, adapting to unevenness on different mounting surfaces and ensuring the levelness and stability of the cover plate installation. The anti-slip texture of the rubber support 302 serves both anti-slip and shock absorption functions, effectively absorbing vehicle impact loads and extending the service life of the cover plate. In this embodiment, four support bases 3 are provided, located at the four corners of the cover plate, specifically at the bottom of the triangular transition area 5.

[0026] Therefore, this embodiment solves the problems of heavy weight and high maintenance cost of traditional side ditch covers by using UHPC panel 1, corrugated stiffening ribs 2 and multiple support bases 3. It has significant technical advantages in terms of safety, durability and economy. Its lightweight nature facilitates construction and has good application prospects.

[0027] The specific embodiments of this utility model have been described in detail above with reference to the figures, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A UHPC lightweight side ditch cover, characterized in that: The cover plate includes a UHPC panel (1), a wave-shaped stiffening rib (2), and multiple support bases (3). The UHPC panel (1) includes an anti-slip layer, a load-bearing layer, and a crack-resistant layer arranged from top to bottom. The wave-shaped stiffening rib (2) is located at the bottom of the UHPC panel (1). The wave-shaped stiffening rib (2) includes a wave-shaped continuous structure (201) arranged on both sides along the length direction of the UHPC panel (1). Multiple straight plate connecting ribs (4) are connected between two wave-shaped continuous structures (201). Multiple support bases (3) are located at the bottom of the cover plate to adjust the height of the cover plate.

2. The UHPC lightweight side ditch cover according to claim 1, characterized in that: A triangular transition zone (5) is provided at the connection between the wave-shaped stiffening rib (2) and the UHPC panel (1).

3. The UHPC lightweight side ditch cover according to claim 2, characterized in that: The wave-shaped continuous structure (201), the straight plate connecting rib (4), and the triangular transition zone (5) are all made of UHPC material.

4. The UHPC lightweight side ditch cover according to claim 1, characterized in that: The wave-shaped continuous structure (201) is vertically connected to the UHPC panel (1). The two opposite sides of the wave-shaped continuous structure (201) are wave surfaces with a wavelength of 150mm±5% and a wave height of 30mm±5%, and its waveform profile is a sinusoidal curve. The bottom surface of the wave-shaped continuous structure (201) is set as a horizontal plane, and its thickness is set to gradually decrease from top to bottom.

5. The UHPC lightweight side ditch cover according to claim 1, characterized in that: The support base (3) includes a steel sleeve embedded in the bottom of the cover plate. The steel sleeve is internally threaded with an adjusting screw (301). The bottom of the adjusting screw (301) is fixed with a rubber support (302) with anti-slip texture.

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