Rainwater pipeline excavation and backfill structure
By designing a trapezoidal stormwater pipe excavation and backfill structure with narrow bottom and wide bottom, the problems of construction quality and drainage performance of rainwater pipes in the prior art are solved, and higher stability, leakage prevention and drainage performance are achieved, while reducing costs and pollution.
Patent Information
- Application Number
- CN202421679455.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-07-16
AI Technical Summary
During the construction process, the existing rainwater pipeline trenches have problems such as insufficient bottom compaction, unreasonable slope, and insufficient pipeline connection tightness, resulting in reduced pipeline sinking, rupture, leakage and drainage performance.
A rainwater pipe excavation and backfill structure is designed, and a trapezoidal structure with a narrow bottom and wide top is adopted, including a foundation layer, a stone chip backfill layer and an original soil backfill layer. The rainwater pipe is embedded in it, and the socket is sealed through a rubber ring to optimize the support angle and backfill layer thickness to improve stability.
Improves the stability and leakage prevention capabilities of the stormwater pipes, ensures good drainage performance, reduces damage, and reduces costs and pollution by using original road surface milling materials.
Smart Images
Figure CN223017775U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of road drainage engineering, and particularly relates to a rainwater pipe excavation and backfill structure. Background Art
[0002] In the construction of urban municipal roads, the rainwater drainage project is a very important part and accounts for a relatively large proportion. In order to better discharge rainfall and prevent serious waterlogging on the road surface during rainstorm weather from affecting normal traffic, it is necessary to excavate rainwater pipes during the road construction process and bury the rainwater pipes below the ground roadbed to facilitate better discharge of rainwater.
[0003] During the construction of the rainwater pipe trench, after determining the excavation depth and excavation route, it is usually excavated in sections. However, during the construction of the existing rainwater pipe trenches, there are often many factors that affect the construction quality and damage the pipe system, mainly including the following points:
[0004] 1. The compaction degree of the bottom of the excavated trench is insufficient, and phenomena such as sinking and cracking of the pipe occur after long-term use, resulting in pipe leakage.
[0005] 2. The slope of the excavated trench is unreasonable, the stability of the backfill structure is poor, and problems such as collapse of the backfill soil are likely to occur.
[0006] 3. The tightness of the pipe connection is insufficient, and dripping occurs at the socket and spigot joints of the pipe, damaging the trench structure and reducing the drainage performance at the same time. Content of the Utility Model
[0007] In view of this, the purpose of the utility model is to design a rainwater pipe excavation and backfill structure, improve the stability of the rainwater pipe installation structure, enhance the anti-leakage ability of the rainwater pipe, ensure good drainage performance, reduce the occurrence of damage, simplify the process, use the original road surface milling material for the base layer construction, reduce costs, reduce the discharge of construction waste, reduce pollution and protect the environment.
[0008] The utility model provides a rainwater pipe excavation and backfill structure, which is arranged below the roadbed and has a trapezoidal structure with a narrow bottom and a wide top in cross-section, including: a base layer, a stone chip backfill layer, and an undisturbed soil backfill layer arranged in sequence from bottom to top. A rainwater pipe is erected above the base layer, and the rainwater pipe is embedded in the stone chip backfill layer and the undisturbed soil backfill layer;
[0009] The top height of the undisturbed soil backfill layer is higher than the top height of the outer pipe wall of the rainwater pipe;
[0010] The base layer is paved with stone chips and / or the original road surface milling material.
[0011] The original road surface milling material is an asphalt and stone mixture scraped off from the original damaged asphalt sand road surface by a milling machine. The original road surface milling material is used as the material for backfilling the original road surface to serve as a cushion foundation, reducing the emission of construction waste, saving costs, reducing pollution, and protecting the environment.
[0012] When backfilling the rainwater pipeline backfill material of the present utility model, a layered backfilling measure is adopted to ensure the stability and drainage performance of the rainwater pipeline.
[0013] Furthermore, there are multiple rainwater pipelines. At the ends of every two adjacent installed rainwater pipelines, socket and spigot pipes are provided. The socket and spigot pipes include: the spigot of one rainwater pipeline and the socket of the adjacent other rainwater pipeline; a rubber ring is arranged between the spigot and the socket.
[0014] The rubber ring is used for sealing between two adjacent installed rainwater pipelines, preventing leakage of the rainwater pipeline, and improving the drainage performance of the rainwater pipeline.
[0015] Furthermore, the bottom of the outer pipe wall of the rainwater pipeline is flush with the bottom of the stone chip backfill layer; at the two joints between the outer pipe wall of the rainwater pipeline and the top of the stone chip backfill layer, the connection angles with the axis of the rainwater pipeline are 115 - 125°, preferably 120°. This support angle evenly disperses the structural pressure formed by the gravity of the rainwater pipeline into the backfill layer structures on both sides of the pipeline, so as to prevent the pipeline at the backfill layer position from being damaged due to excessive local pressure.
[0016] Furthermore, the distance between the top of the undisturbed soil backfill layer and the top of the outer pipe wall of the rainwater pipeline is 490 - 510 mm, preferably 500 mm. By setting a sufficient burial depth, the structural installation stability of the rainwater pipeline is improved.
[0017] Furthermore, the slopes on both sides of the trapezoidal structure of the cross-section are 1:0.33. By designing the slope, the stability of the overall excavation and backfill structure is improved.
[0018] Furthermore, the base layer, the stone chip backfill layer, and the undisturbed soil backfill layer are all compacted structures. The stability of the rainwater pipeline excavation structure is improved.
[0019] Preferably, the compaction degree of the base layer ≥ 90%, the compaction degree of the stone chip backfill layer ≥ 93%, and the compaction degree of the undisturbed soil backfill layer ≥ 93%.
[0020] Furthermore, the height difference between the undisturbed soil backfill layers on both sides of the rainwater pipeline is not greater than 0.3 meters.
[0021] Preferably, the backfill of the original soil on both sides of the rainwater pipe is carried out simultaneously. For the range within 50 cm above the top of the outer pipe wall of the rainwater pipe, heavy compaction equipment is not used to avoid damaging the rainwater pipe. A walk-behind vibratory roller or a walk-behind vibrating rammer can be used to achieve the required compactness.
[0022] Further, the insertion direction of the socket and the spigot is consistent with the water flow direction.
[0023] Further, the dimensions of the rainwater pipe and the thickness dimensions of the stone chip backfill layer and the original soil backfill layer correspond to any one of the following (as shown in Table 1):
[0024] Inner diameter of the rainwater pipe φ300 mm, wall thickness of the rainwater pipe 30 mm, thickness of the stone chip backfill layer 100 mm, thickness of the original soil backfill layer 90 mm;
[0025] Inner diameter of the rainwater pipe φ500 mm, wall thickness of the rainwater pipe 50 mm, thickness of the stone chip backfill layer 100 mm, thickness of the original soil backfill layer 150 mm;
[0026] Inner diameter of the rainwater pipe φ600 mm, wall thickness of the rainwater pipe 60 mm, thickness of the stone chip backfill layer 100 mm, thickness of the original soil backfill layer 180 mm;
[0027] Inner diameter of the rainwater pipe φ800 mm, wall thickness of the rainwater pipe 80 mm, thickness of the stone chip backfill layer 150 mm, thickness of the original soil backfill layer 240 mm;
[0028] Inner diameter of the rainwater pipe φ1000 mm, wall thickness of the rainwater pipe 100 mm, thickness of the stone chip backfill layer 200 mm, thickness of the original soil backfill layer 300 mm;
[0029] Inner diameter of the rainwater pipe φ1200 mm, wall thickness of the rainwater pipe 120 mm, thickness of the stone chip backfill layer 250 mm, thickness of the original soil backfill layer 360 mm;
[0030] Inner diameter of the rainwater pipe φ1500 mm, wall thickness of the rainwater pipe 150 mm, thickness of the stone chip backfill layer 300 mm, thickness of the original soil backfill layer 450 mm.
[0031] Further, the dimensions of the rainwater pipe and the distance dimension from the bottom of the base layer to the side of the outer pipe wall of the rainwater pipe correspond to any one of the following (as shown in Table 1):
[0032] Inner diameter of the rainwater pipe φ300 mm, wall thickness of the rainwater pipe 30 mm, distance from the bottom of the base layer to the side of the outer pipe wall of the rainwater pipe 400 mm;
[0033] The inner diameter of the rainwater pipe is φ500mm, the wall thickness of the rainwater pipe is 50mm, and the distance from the bottom of the foundation layer to the outer wall side of the rainwater pipe is 400mm;
[0034] The inner diameter of the rainwater pipe is φ600mm, the wall thickness of the rainwater pipe is 60mm, and the distance from the bottom of the foundation layer to the outer wall side of the rainwater pipe is 500mm;
[0035] The inner diameter of the rainwater pipe is φ800mm, the wall thickness of the rainwater pipe is 80mm, and the distance from the bottom of the foundation layer to the outer wall side of the rainwater pipe is 500mm;
[0036] The inner diameter of the rainwater pipe is φ1000mm, the wall thickness of the rainwater pipe is 100mm, and the distance from the bottom of the foundation layer to the outer wall side of the rainwater pipe is 500mm;
[0037] The inner diameter of the rainwater pipe is φ1200mm, the wall thickness of the rainwater pipe is 120mm, and the distance from the bottom of the foundation layer to the outer wall side of the rainwater pipe is 600mm;
[0038] The inner diameter of the rainwater pipe is φ1500mm, the wall thickness of the rainwater pipe is 150mm, and the distance from the bottom of the foundation layer to the outer wall side of the rainwater pipe is 600mm.
[0039] Table 1
[0040]
[0041] Compared with the prior art, the beneficial effects of the rainwater pipe excavation and backfilling structure of the present utility model are as follows:
[0042] The rainwater pipe excavation and backfilling structure provided by the present utility model has a simple and reasonable structure, strong integrity, improves the strength and stability of the rainwater pipe excavation structure, improves the anti-leakage ability of the rainwater pipe, ensures the stability and drainage performance of the rainwater pipe, and reduces the occurrence of damage; using the original road surface milling material for the construction of the foundation layer simplifies the process, reduces the cost, and reduces the discharge of construction waste, reduces pollution, and protects the environment. Brief Description of the Drawings
[0043] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:
[0044] Figure 1 is a cross-sectional schematic diagram of a rainwater pipe excavation and backfilling structure of the present utility model;
[0045] Figure 2Schematic diagram of the socket and spigot installation structure of the socket and spigot pipe in the embodiment of the present utility model.
[0046] The markings in the attached drawings are shown as:
[0047] 1, base layer; 2, stone chip backfill layer; 3, undisturbed soil backfill layer; 4, rainwater pipe; 5, socket; 6, spigot; 7, rubber ring. Detailed implementation manners
[0048] Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art. It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. Hereinafter, the present utility model will be described in detail with reference to the drawings and in conjunction with the embodiments.
[0049] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and 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 therefore should not be construed as a limitation of the present utility model.
[0050] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the term "connection" should be understood in a broad sense. For example, it 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 connection 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.
[0051] The following will specifically describe the embodiments of the present utility model with reference to the drawings:
[0052] The embodiment of the present utility model provides a rainwater pipe excavation and backfill structure, as shown in Figure 1 shown, which is arranged below the roadbed and has a trapezoidal structure with a narrower bottom and a wider top. It includes: a base layer 1, a stone chip backfill layer 2, and an undisturbed soil backfill layer 3 arranged in sequence from bottom to top. A rainwater pipe 4 is erected above the base layer 1, and the rainwater pipe 4 is embedded in the stone chip backfill layer 2 and the undisturbed soil backfill layer 3; when backfilling the rainwater pipe with backfill materials, a layered backfill measure is adopted to ensure the stability and drainage performance of the rainwater pipe 4.
[0053] The top height of the undisturbed soil backfill layer 3 is higher than the top height of the outer pipe wall of the rainwater pipe 4;
[0054] The base layer 1 is paved with the original road surface milled material. The original road surface milled material is an asphalt and gravel mixture scraped off from the original damaged asphalt sand road surface by a milling machine. The original road surface milled material is used as the backfill material of the original road surface for the cushion foundation, reducing the discharge of construction waste, saving costs, reducing pollution, and protecting the environment.
[0055] In this embodiment, the dimensions of the rainwater pipe 4 correspond to the thickness dimensions of the stone chip backfill layer 2 and the undisturbed soil backfill layer 3 as follows:
[0056] The inner diameter of the rainwater pipe is φ500mm, the wall thickness of the rainwater pipe is 50mm, the thickness of the stone chip backfill layer is 100mm, and the thickness of the undisturbed soil backfill layer is 150mm.
[0057] The dimensions of the rainwater pipe correspond to the distance dimension from the bottom of the base layer to the side of the outer pipe wall of the rainwater pipe as follows:
[0058] The inner diameter of the rainwater pipe is φ500mm, the wall thickness of the rainwater pipe is 50mm, and the distance from the bottom of the base layer to the side of the outer pipe wall of the rainwater pipe is 400mm.
[0059] There are multiple rainwater pipes 4, and socket and spigot pipes are provided at the ends of each two adjacent installed rainwater pipes 4. See Figure 2 As shown, the socket and spigot pipe includes: the spigot 5 of one rainwater pipe and the socket 6 of the adjacent other rainwater pipe; the insertion direction of the spigot 5 and the socket 6 is the same as the water flow direction.
[0060] A rubber ring 7 is provided between the spigot 5 and the socket 6. The rubber ring 7 is used for sealing between two adjacent installed rainwater pipes 4, preventing the rainwater pipes 4 from leaking, and improving the drainage performance of the rainwater pipes 4.
[0061] The bottom of the outer pipe wall of the rainwater pipe 4 is flush with the bottom of the stone chip backfill layer 2; at the two joints between the outer pipe wall of the rainwater pipe 4 and the top of the stone chip backfill layer 2, the connection angle with the axis of the rainwater pipe 4 is 120°. This support angle evenly disperses the structural pressure formed by the gravity of the rainwater pipe 4 into the backfill layer structures on both sides of the pipe, so as to prevent the pipe in the backfill layer position from being damaged due to excessive local pressure.
[0062] The distance between the top of the undisturbed soil backfill layer 3 and the top of the outer pipe wall of the rainwater pipe 4 is 500mm. By setting a sufficient burial depth, the structural installation stability of the rainwater pipe 4 is improved.
[0063] The slopes on both sides of the trapezoidal structure of the cross-section are 1:0.33. By designing the slope, the stability of the overall excavation and backfill structure is improved.
[0064] The base layer 1, the stone chip backfill layer 2, and the undisturbed soil backfill layer 3 are all compacted structures. The compaction degree of the base layer 1 is ≥90%, the compaction degree of the stone chip backfill layer 2 is ≥93%, and the compaction degree of the undisturbed soil backfill layer 3 is ≥93%. This improves the stability of the rainwater pipeline excavation structure.
[0065] The height difference of the undisturbed soil backfill layer 3 on both sides of the rainwater pipeline 4 is not greater than 0.3 m. The undisturbed soil on both sides of the rainwater pipeline 4 is backfilled simultaneously. Within 50 cm above the top of the outer pipe wall of the rainwater pipeline 4, heavy compaction equipment is not used to avoid damaging the rainwater pipeline 4. A walk-behind vibratory roller or a walk-behind vibrating rammer is used to make the compactness meet the requirements.
[0066] In the engineering construction application of this embodiment, preferably, the ground stacking load of the rainwater pipeline 4 is not greater than 10 KN / m 2 , when mechanical excavation is used, 20 cm thick undisturbed soil in the undisturbed soil backfill layer 3 is reserved and manually cleaned in the trench. Overexcavation is not allowed. If there is overexcavation, stone chips are used for replacement filling.
[0067] When there is groundwater, reliable dewatering measures are adopted to lower the groundwater level to not less than 0.5 m below the bottom of the trench to achieve dry-trench construction.
[0068] After the excavation of the trench reaches the design elevation, trench inspection is carried out. During the construction process, prevent water from entering the trench and causing the pipeline to float.
[0069] After the pipeline is placed, backfill and compaction are carried out in a timely manner.
[0070] The rainwater pipeline excavation and backfill structure provided by this embodiment has a simple and reasonable structure, strong integrity, improves the strength and stability of the rainwater pipeline excavation structure, improves the anti-leakage ability of the rainwater pipeline, ensures the stability and drainage performance of the rainwater pipeline, reduces the occurrence of damage; uses the original road surface milling material for the construction of the base layer, simplifies the process, reduces the cost, and reduces the discharge of construction waste, reduces pollution, and protects the environment.
[0071] So far, the technical solution of the present invention has been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or replacements to the relevant technical features, and the technical solutions after these changes or replacements will all fall within the protection scope of the present invention.
[0072] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model; for those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A rainwater pipe excavation and backfilling structure, characterized in that: It is arranged below the roadbed, and has a trapezoidal structure with a narrow bottom and a wide top in cross section, including: a foundation layer, a stone chip backfill layer, and an original soil backfill layer arranged in sequence from bottom to top, a rainwater pipe is arranged above the foundation layer, and the rainwater pipe is embedded in the stone chip backfill layer and the original soil backfill layer; The top height of the original soil backfill layer is higher than the top height of the outer pipe wall of the rainwater pipe; The base layer is paved with stone chips and / or original road surface milling materials.
2. The rainwater pipe excavation and backfilling structure according to claim 1 is characterized in that: There are multiple rainwater pipes, and the ends of every two adjacently installed rainwater pipes are provided with a spigot pipe, and the spigot pipe comprises: a spigot of one rainwater pipe and a spigot of another adjacent rainwater pipe; a rubber ring is provided between the spigot and the spigot.
3. The rainwater pipe excavation and backfilling structure according to claim 1 is characterized in that: The bottom of the outer pipe wall of the rainwater pipe is flush with the bottom of the stone chip backfill layer; the two intersections of the outer pipe wall of the rainwater pipe and the top of the stone chip backfill layer have a connection angle of 115-125° with the axis of the rainwater pipe.
4. The rainwater pipe excavation and backfilling structure according to claim 1, characterized in that: The distance between the top of the original soil backfill layer and the top of the outer pipe wall of the rainwater pipe is 490-510 mm.
5. The rainwater pipe excavation and backfilling structure according to claim 1, characterized in that: The slopes on both sides of the trapezoidal structure of the cross section are 1:0.
33.
6. The rainwater pipe excavation and backfilling structure according to claim 1, characterized in that: The foundation layer, stone chip backfill layer and original soil backfill layer are all compacted structures.
7. The rainwater pipe excavation and backfilling structure according to claim 1, characterized in that: The height difference of the original soil backfill layer on both sides of the rainwater pipe is not more than 0.3 meters.
8. The rainwater pipe excavation and backfilling structure according to claim 2, characterized in that: The insertion direction of the socket and the socket is consistent with the water flow direction.
9. The rainwater pipe excavation and backfilling structure according to claim 1, characterized in that: The size of the rainwater pipe and the thickness of the stone chip backfill layer and the original soil backfill layer correspond to any of the following: The inner diameter of the rainwater pipe is φ300mm, the wall thickness of the rainwater pipe is 30mm, the thickness of the stone chip backfill layer is 100mm, and the thickness of the original soil backfill layer is 90mm; The inner diameter of the rainwater pipe is φ500mm, the wall thickness of the rainwater pipe is 50mm, the thickness of the stone chip backfill layer is 100mm, and the thickness of the original soil backfill layer is 150mm; The inner diameter of the rainwater pipe is φ600mm, the wall thickness of the rainwater pipe is 60mm, the thickness of the stone chip backfill layer is 100mm, and the thickness of the original soil backfill layer is 180mm; The inner diameter of the rainwater pipe is φ800mm, the wall thickness of the rainwater pipe is 80mm, the thickness of the stone chip backfill layer is 150mm, and the thickness of the original soil backfill layer is 240mm; The inner diameter of the rainwater pipe is φ1000mm, the wall thickness of the rainwater pipe is 100mm, the thickness of the stone chip backfill layer is 200mm, and the thickness of the original soil backfill layer is 300mm; The inner diameter of the rainwater pipe is φ1200mm, the wall thickness of the rainwater pipe is 120mm, the thickness of the stone chip backfill layer is 250mm, and the thickness of the original soil backfill layer is 360mm; The inner diameter of the rainwater pipe is φ1500mm, the wall thickness of the rainwater pipe is 150mm, the thickness of the stone chip backfill layer is 300mm, and the thickness of the original soil backfill layer is 450mm.
10. The rainwater pipe excavation and backfilling structure according to claim 1, characterized in that: The size of the rainwater pipe and the distance from the bottom of the base layer to the side of the outer pipe wall of the rainwater pipe correspond to any of the following: The inner diameter of the rainwater pipe is φ300mm, the wall thickness of the rainwater pipe is 30mm, and the distance from the bottom of the foundation layer to the side of the outer pipe wall of the rainwater pipe is 400mm; The inner diameter of the rainwater pipe is φ500mm, the wall thickness of the rainwater pipe is 50mm, and the distance from the bottom of the foundation layer to the side of the outer pipe wall of the rainwater pipe is 400mm; The inner diameter of the rainwater pipe is φ600mm, the wall thickness of the rainwater pipe is 60mm, and the distance from the bottom of the foundation layer to the side of the outer pipe wall of the rainwater pipe is 500mm; The inner diameter of the rainwater pipe is φ800mm, the wall thickness of the rainwater pipe is 80mm, and the distance from the bottom of the foundation layer to the side of the outer pipe wall of the rainwater pipe is 500mm; The inner diameter of the rainwater pipe is φ1000mm, the wall thickness of the rainwater pipe is 100mm, and the distance from the bottom of the foundation layer to the side of the outer pipe wall of the rainwater pipe is 500mm; The inner diameter of the rainwater pipe is φ1200mm, the wall thickness of the rainwater pipe is 120mm, and the distance from the bottom of the foundation layer to the side of the outer pipe wall of the rainwater pipe is 600mm; The inner diameter of the rainwater pipe is φ1500mm, the wall thickness of the rainwater pipe is 150mm, and the distance from the bottom of the foundation layer to the side of the outer pipe wall of the rainwater pipe is 600mm.