Simple structure for protecting shallowly-buried plastic pipeline under urban road

Abstract

The utility model provides a simple structure for protecting a shallowly-buried plastic pipeline under an urban road, which comprises a groove, the section of the groove is trapezoidal, platforms for digging the groove are arranged on two sides of the groove along the radial direction, a foundation bed, a backfill layer and an overburden layer are sequentially arranged in the groove from bottom to top, a plastic pipe is arranged on the foundation bed, and the backfill layer is arranged on the plastic pipe. The backfilling layer is arranged in the backfilling layer; and the pressure-resistant plates are laid above the plastic pipes side by side, and the two ends of the pressure-resistant plates are fixed to the platform and located in the backfill layer. According to the construction structure of laying the pressure-resistant plate above the pipeline, in the daily construction process, the process is simple and rapid, the engineering construction difficulty is low, the engineering amount is saved, the construction efficiency is improved, and the engineering investment is saved; according to the simple structure, the application scene and range of shallow burying construction of the municipal pipe network plastic pipeline are enlarged, rapid construction and rapid recovery can be achieved, and safety accidents caused by large burying depth of the pipeline and too deep trench excavation construction are reduced.

Description

Technical Field

[0001] This utility model relates to the field of municipal engineering technology, and in particular to a simple structure for protecting shallowly buried plastic pipes under urban roads. Background Technology

[0002] Urban pipeline systems are a crucial component of urban infrastructure, undertaking multiple functions such as water supply, drainage, and gas transmission. Their safety, reliability, and service life directly impact the normal operation of the city and the quality of life for residents. Currently, urban drainage pipelines generally use materials such as concrete pipes, HDPE pipes, PE pipes, and cast iron pipes. However, these materials still present numerous problems in practical applications. For example, concrete pipes have poor impermeability, and cast iron pipes have poor corrosion resistance, easily leading to pipe leakage. HDPE and PE pipes, among other plastic pipes, are widely used in municipal drainage networks due to their advantages such as light weight, corrosion resistance, and convenient construction. However, shallow-buried plastic pipes are buried at shallow depths, with some urban roads having less than 0.7m of soil cover. They are susceptible to impacts from ground vehicle loads and vibrations from construction machinery, affecting their service life and potentially causing environmental pollution and safety accidents. Common reinforcement measures include steel sleeves and reinforced concrete protective layers, but these measures are costly, increase pipe burial depth, require pipe penetration and caulking, and are inconvenient to construct. Therefore, it is necessary to explore a simpler method to further reinforce shallow-buried plastic pipes. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a simple structure for protecting shallowly buried plastic pipes under urban roads. To achieve the above objectives, this utility model adopts the following technical solution:

[0004] A simple structure for protecting shallowly buried plastic pipes under urban roads, comprising:

[0005] The trench has a trapezoidal cross-section. Platforms for trench excavation are set on both sides of the trench in the radial direction. From bottom to top, the trench contains a foundation pad, a backfill layer, and a soil cover layer. The plastic pipe is placed on the foundation pad and inside the backfill layer.

[0006] The pressure-resistant boards are laid side by side above the plastic pipes, with both ends of the pressure-resistant boards fixed on the platform and located in the backfill layer.

[0007] Furthermore, arc-shaped limiting blocks are provided at the bottom of both sides of the plastic tube, and the limiting blocks are fixed on the base pad layer.

[0008] Furthermore, the pressure-resistant plate is fixed to the platform using expansion screws or cement nails.

[0009] Furthermore, the pressure-resistant plate has connection holes at both ends for fixing.

[0010] Furthermore, the end of the pressure-resistant plate is provided with an inclined portion facing the bottom, which corresponds to the inclined surface of the groove.

[0011] Furthermore, a gap is provided between the top end of the plastic tube and the pressure-resistant plate.

[0012] Furthermore, the spacing is not less than 180mm.

[0013] Furthermore, the foundation cushion layer is gravel with a thickness of 80-120mm, the backfill layer is medium-coarse sand with a particle size not exceeding 25mm, and the covering soil layer is clay, with a distance of not less than 500mm from the top of the plastic pipe.

[0014] Furthermore, the compression-resistant plate is a high-density polyethylene plate or an ultra-high molecular weight polyethylene plate with a thickness of 20-30mm.

[0015] Furthermore, the pressure-resistant plate is a one-piece plate, with a length of 4-6m for each plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The construction structure of laying pressure-resistant plates above pipelines is simple and quick in daily construction, with low construction difficulty, saving the amount of work, improving construction efficiency, and saving project investment.

[0018] 2. Urban roads are often under heavy traffic pressure, making it inconvenient to occupy the road for long-term construction. It is necessary to reduce the laying of deep-buried pipelines. This simple structure increases the application scenarios and scope of shallow-buried construction of municipal pipeline plastic pipes, enabling rapid construction and restoration, and reducing safety accidents caused by deep pipeline burial and excessive trench excavation. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0020] Figure 1 This is a schematic diagram of the cross-sectional structure of the trench in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the main structure of the compression plate according to an embodiment of the present invention;

[0022] Figure 3 This is a bottom view of the anti-compression plate structure according to an embodiment of the present invention.

[0023] In the above attached diagram: 1. trench; 2. platform; 3. foundation cushion layer; 4. backfill layer; 5. soil cover layer; 6. plastic pipe; 7. compression plate; 8. limiting block; 9. connecting hole; 10. inclined part. Detailed Implementation

[0024] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0025] like Figures 1-3 As shown in the figure, this utility model embodiment proposes a simple structure for protecting shallowly buried plastic pipes under urban roads, comprising:

[0026] The trench 1 has a trapezoidal cross section. Platforms 2 for excavating the trench 1 are set on both sides of the trench 1 in the radial direction. The trench 1 is provided with a foundation cushion layer 3, a backfill layer 4 and a soil cover layer 5 in sequence from bottom to top. The plastic pipe 6 is set on the foundation cushion layer 3 and located inside the backfill layer 4.

[0027] Compression plates 7 are laid side by side above plastic pipes 6. Both ends of the compression plates 7 are fixed on platform 2 and located in backfill layer 4.

[0028] In this embodiment, as Figure 1 As shown, arc-shaped limiting blocks 8 are provided on both sides of the bottom of the plastic tube 6. The limiting blocks 8 are fixed to the base pad 3 by cement nails or the like. The limiting blocks 8 limit the placement position of the plastic tube 6, so that the plastic tube 6 is placed in the center and the force on the plastic tube 6 is even.

[0029] In this embodiment, as Figure 1 As shown, the pressure-resistant plate 7 is fixed to the platform 2 using expansion bolts or cement nails. Fixing the pressure-resistant plate 7 with expansion bolts or cement nails facilitates construction and improves construction efficiency.

[0030] In this embodiment, as Figure 2 , 3 As shown, the pressure-resistant plate 7 has connecting holes 9 at both ends for fixing. By opening connecting holes 9 on the pressure-resistant plate 7, it is convenient to pass expansion screws or cement nails through the connecting holes 9 to fix the pressure-resistant plate 7 to the platform 2, thereby improving the fixing efficiency of the pressure-resistant plate 7 and thus improving the construction efficiency.

[0031] In this embodiment, as Figure 2 , 3 As shown, the end of the pressure-resistant plate 7 is provided with an inclined portion 10 facing the bottom, and the inclined portion 10 corresponds to the inclined surface of the groove 1. By using the inclined portion 10 to rest against the inclined surface of the groove 1, the force exerted by the groove 1 on the pressure-resistant plate 7 is increased, and the downward movement of the pressure-resistant plate 7 is slowed down.

[0032] In this embodiment, as Figure 1 As shown, a gap is provided between the top end of the plastic pipe 6 and the pressure-resistant plate 7. By setting the gap, when the pressure-resistant plate 7 is subjected to a pressure drop, the pressure-resistant plate 7 has enough space to deform in the backfill layer 4, avoiding squeezing the plastic pipe 6 located in the backfill layer 4 and preventing the plastic pipe 6 from deforming and breaking.

[0033] In this embodiment, as Figure 1 As shown, the spacing is not less than 180mm.

[0034] In this embodiment, as Figure 1 As shown, the foundation cushion layer 3 is gravel with a thickness of 80-120mm, the backfill layer 4 is medium-coarse sand with a particle size not exceeding 25mm, and the covering soil layer 5 is clay with a distance of not less than 500mm from the top of the plastic pipe 6.

[0035] In this embodiment, the compression plate 7 is a high-density polyethylene (HDPE) plate or an ultra-high molecular weight polyethylene (UHMWPE) plate with a thickness of 20-30 mm. HDPE plates or UHMWPE plates have good chemical stability, corrosion resistance, high hardness, high strength, and are easy to construct.

[0036] In this embodiment, the compression plate 7 is a one-piece plate, and the length of one compression plate 7 is 4-6m. The one-piece compression plate 7 has good overall strength, which improves the durability of the compression plate 7.

[0037] The working principle is as follows: After trench 1 is excavated, an 80-120mm thick gravel foundation pad 3 is laid at the bottom of trench 1. After compaction, the limiting blocks 8 are fixed at intervals. Plastic pipes 6 are installed above the foundation pad 3, so that the plastic pipes 6 are located between the limiting blocks 8. A backfill layer 4 of medium-coarse sand is backfilled in layers on the outside of the plastic pipes 6. After backfilling to a thickness of at least 180mm on top of the plastic pipes 6, it is compacted. High-density polyethylene or ultra-high molecular weight polyethylene integrated anti-compression plate 7 is installed on the medium-coarse sand backfill layer 4. A 500mm platform 2 is reserved at the edge of trench 1 for placing the anti-compression plate 7. The two ends of the anti-compression plate 7 are fixed on the platform 2 with expansion screws or cement nails so that its stress point is located on the platform 2 of trench 1. Continue backfilling medium-coarse sand layer 4 above the anti-compression plate 7, backfilling to a height of at least 500mm from the top of the pipe. The particle size of the medium-coarse sand in backfill layer 4 should not exceed 25mm. After compaction, continue backfilling clay on top up to the road structure layer. After compaction, lay water-stabilized soil and concrete to complete the road restoration. The project has low construction difficulty, saves on the amount of work, improves construction efficiency, and saves on project investment.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A simple structure for protecting shallowly buried plastic pipes under urban roads, characterized in that, The utility model relates to a kind of plastic pipe trenching structure, including: Trench, its section is trapezoidal, and the both sides of trench are provided with platform for excavating trench along radial direction, and foundation cushion layer, backfill layer and topsoil layer are sequentially arranged in trench from below to above, and plastic pipe is arranged on foundation cushion layer and is located in backfill layer; Compression plate is laid side by side above plastic pipe, and both ends of compression plate are fixed on platform and located in backfill layer.

2. A simple structure for protecting a shallowly buried plastic pipe under an urban road according to claim 1, characterized in that: The both sides bottom of the plastic pipe is provided with arc limiting block, and the limiting block is fixed on foundation cushion layer.

3. A simple structure for protecting shallowly buried plastic pipes under urban roads according to claim 1, characterized in that: The compression plate is fixed with platform using expansion screw or cement nail.

4. A simple structure for protecting a shallowly buried plastic pipe under an urban road according to claim 3, characterized in that: Both ends of the compression plate are provided with connecting hole for fixing.

5. A simple structure for protecting shallowly buried plastic pipes under urban roads according to claim 1, characterized in that: The end of the compression plate is provided with inclined portion towards bottom, and the inclined portion corresponds to the slope of the trench.

6. A simple structure for protecting shallowly buried plastic pipes under urban roads according to claim 1, characterized in that: The top end of the plastic pipe and the compression plate are provided with spacing.

7. A simple structure for protecting shallowly buried plastic pipes under urban roads according to claim 6, characterized in that: The spacing is not less than 180mm.

8. A simple structure for protecting shallowly buried plastic pipes under urban roads according to claim 1, characterized in that: The foundation cushion layer is gravel, and the thickness is 80-120mm, the backfill layer is medium-coarse sand, and the particle size should not be greater than 25mm, and the topsoil layer is clay, and the distance from the top of plastic pipe is not less than 500mm.

9. A simple structure for protecting shallowly buried plastic pipes under urban roads according to claim 1, characterized in that: The compression plate is high-density polyethylene plate or ultrahigh molecular weight polyethylene plate, and the thickness is 20-30mm.

10. A simple structure for protecting a shallowly buried plastic pipe under an urban road according to claim 9, characterized in that: The compression plate is an integrated plate, and the length of one compression plate is 4-6m.

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