A municipal drainage structure

Abstract

The utility model provides a kind of municipal drainage structure, including drainage pipeline, inspection well and groove, drainage pipeline is received and is arranged at the both sides of inspection well, groove bottom end is successively laid fine pond residue cushion layer and C20 concrete layer, the outer wall of drainage pipeline is provided with concrete protective housing, drainage pipeline is horizontally arranged on C20 concrete layer upper end, the lower end surface of concrete protective housing and the upper end surface of C20 concrete layer are in abutment, the both sides of drainage pipeline are filled with broken stone scrap heap, the side of concrete protective housing and broken stone scrap heap are in abutment, drainage pipeline and broken stone scrap upper end are laid fine pond residue backfill layer, and inspection well is provided with inspection well in upper end;The utility model's drainage structure system, through fine pond residue cushion layer, C20 concrete layer, concrete protective housing and broken stone scrap heap and so on multilayer structure, the stability of foundation and the protectivity of pipeline are strengthened, effectively prevent pipeline displacement and damage, improve the durability and drainage efficiency of overall structure.

Description

Technical Field

[0001] This utility model relates to the field of municipal drainage pipeline technology, and in particular to a municipal drainage pipeline structure. Background Technology

[0002] Municipal drainage systems are an important component of urban infrastructure, and their structural design directly affects drainage efficiency, construction quality, and ease of maintenance. Traditional drainage structures often suffer from the following problems: leakage is prone to occur at the connection between drainage pipes and inspection wells; improper trench foundation treatment leads to uneven settlement; construction is difficult when the groundwater level is high; insufficient pipe protection makes them susceptible to external damage; and the outlet is easily eroded, affecting its stability.

[0003] Although there have been some improvements in existing technologies, such as using concrete foundations and setting waterstops, problems such as complex construction, short-lasting waterproofing effect, and poor adaptability still exist. Utility Model Content

[0004] In view of the shortcomings and defects of the existing technology, this utility model provides a municipal drainage structure. To achieve the purpose of reasonable drainage pipe structure, good waterproof performance and strong adaptability, this utility model provides the following technical solution.

[0005] A municipal drainage structure includes a drainage pipe, an inspection well, and a trench. The drainage pipe is installed on both sides of the inspection well. The bottom of the trench is successively laid with a fine pond slag bedding layer and a C20 concrete layer. A concrete protective shell is installed on the outer wall of the drainage pipe. The drainage pipe is horizontally installed on the upper end of the C20 concrete layer. The lower end face of the concrete protective shell abuts against the upper end face of the C20 concrete layer. The two sides of the drainage pipe are filled with piles of crushed stone. The side of the concrete protective shell abuts against the piles of crushed stone. A fine pond slag backfill layer is laid on the upper end of the drainage pipe and the crushed stone. A manhole is installed on the upper end of the inspection well.

[0006] Compared with existing technologies, this practical drainage system enhances the stability of the foundation and the protection of the pipeline through a multi-layered structure consisting of a fine slag bedding layer, a C20 concrete layer, a concrete protective shell, and a pile of crushed stone. This effectively prevents pipeline displacement and damage, and improves the overall durability and drainage efficiency of the structure.

[0007] Furthermore, the manhole wall is provided with a spigot groove, the outer wall of the drainage pipe near the manhole is provided with a rubber waterstop, and the side wall of the spigot groove is provided with a mating groove. The drainage pipe is inserted and mated in the spigot groove, and the rubber waterstop is snapped into the mating groove.

[0008] Through the above improvements, the combination of the plug groove and the rubber waterstop structure achieves a flexible connection and efficient waterproofing between the drainage pipe and the inspection well, reduces the risk of leakage at the interface, and improves the sealing and reliability of the system.

[0009] Furthermore, a roadbed is laid at the opening of the trench, and a filling layer is filled between the roadbed and the fine pond slag backfill layer. The filling layer is backfilled with the original soil, and several support piers are set in the filling layer. The upper end of the support piers abuts against the lower end face of the roadbed.

[0010] Through the above improvements, the original soil backfill layer is filled between the road base and the fine slag backfill layer, and support piers are set up. Using the original soil as backfill material reduces costs, while the support piers provide additional support to prevent the road base from sinking, ensuring the smoothness and stability of the road surface and reducing the need for later maintenance.

[0011] Furthermore, the sidewalls of the trench and the upper end of the C20 concrete layer are covered with non-woven geotextile.

[0012] Through the above improvements, non-woven geotextiles were laid on the trench sidewalls and C20 concrete layer, which enhanced the isolation and filtration between the soil and the structural layer, prevented soil particle loss, and improved the stability and impermeability of the foundation.

[0013] Furthermore, when the depth of the trench is less than 4m, the excavation slope is 1:0.75; when the depth of the trench is greater than or equal to 4m and less than or equal to 6m, a two-stage slope excavation is adopted, and a second platform is set on both sides of the trench, with the width of the second platform being 1.5m.

[0014] Through the above improvements, the excavation slope or two-stage slope structure can be reasonably set according to the trench depth, which not only ensures construction safety, but also reduces the amount of earthwork and improves construction efficiency and economy.

[0015] Furthermore, a number of drainage wells are provided on one side of the trench, with a spacing of 6m between the drainage wells. The opening of the drainage well is 0.5m above the ground. A drainage ditch is provided on the side of the drainage well away from the trench, and a connecting pipe is provided between the drainage well and the drainage ditch.

[0016] Through the above improvements, by setting up dewatering wells and drainage ditch systems, groundwater in the construction area can be effectively removed, the water level can be lowered, dry conditions can be provided for trench construction, and construction quality can be ensured.

[0017] Furthermore, when the depth of the trench is greater than or equal to 4m and less than or equal to 6m, the drainage well is set on the second platform and symmetrically arranged on both sides of the trench.

[0018] Through the above improvements, symmetrically arranging the drainage wells on the second platform in the case of deep trenches can further improve the drainage effect, enhance construction safety, and increase construction efficiency.

[0019] Furthermore, a retaining wall is provided at the outlet of the drainage pipe, and a mortar-grouted rubble masonry inclined towards the ground is provided on the front side of the retaining wall, the mortar-grouted rubble masonry being 50cm thick.

[0020] Through the above improvements, a retaining wall and masonry structure are installed at the outlet of the drainage pipe, which effectively reduces water erosion, protects the outlet structure, extends service life, and enhances the overall stability of the project.

[0021] Furthermore, a manhole cover is installed at the top of the manhole.

[0022] With the above improvements, manhole covers are installed at the top of the manholes to facilitate daily inspection and maintenance, while preventing foreign objects from falling in, ensuring smooth drainage and personnel safety.

[0023] Furthermore, a manhole cover is provided at the upper end of the manhole. The manhole cover is made of ductile iron and includes a base, a cover body, and a cover plate. The base is fixedly installed at the upper end of the manhole. The cover body is inserted and fitted onto the base. The cover plate has a protruding section. The cover body has an installation groove. The protruding section is hinged and fitted into the installation groove. A rubber strip is filled between the cover body and the cover plate. An opening groove is provided on the side of the cover body away from the installation groove.

[0024] Through the above improvements, the manhole cover is made of ductile iron, which has good durability; the manhole cover includes a base, a cover body and a cover plate, which are connected by hinges to facilitate opening and closing; the use of rubber strips to fill the manhole cover achieves anti-theft, noise reduction and sealing performance; the opening groove design makes it easy to open and improves maintenance convenience.

[0025] Furthermore, a sub-cover is provided inside the manhole cover. The sub-cover is also made of ductile iron material. The cover body extends toward the base to form a connecting frame, and the sub-cover is fitted onto the connecting frame.

[0026] Through the above improvements, a sub-cover is installed inside the manhole cover, forming a double protective structure. This further prevents debris and sewage from entering the inspection well, improving the safety and hygiene of the system. At the same time, the sub-cover is made of ductile iron, which has strong durability. Attached Figure Description

[0027] Figure 1 This is a structural diagram of a municipal drainage ditch backfilling process (ditch depth less than 4m). Figure 2 This is a schematic diagram of a municipal drainage system during dewatering (the trench depth is less than 4m). Figure 3 This is a structural diagram of a municipal drainage ditch backfilling process (ditch depth greater than 4m). Figure 4 This is a schematic diagram of a municipal drainage system during dewatering (the trench depth is greater than 4m). Figure 5 This diagram illustrates the relationship between drainage pipes and inspection wells in a municipal drainage system. Figure 6 A cross-sectional structural diagram of a drainage pipe in a municipal drainage system; Figure 7 This is a diagram showing the installation positions of a municipal drainage system. Figure 8 A schematic diagram of a retaining wall in a municipal drainage system; Figure 9 A schematic diagram of the overall structure of a manhole cover for a municipal drainage system; Figure 10 This is a cross-sectional schematic diagram of a manhole cover for a municipal drainage system.

[0028] The components include: 1. Drainage pipes; 1.1 Concrete protective shell; 1.2 Rubber waterstop; 2. Inspection wells; 2.1 Manholes; 2.2 Insertion grooves; 2.3 Matching grooves; 3. Trench; 3.1 Fine pond slag bedding layer; 3.2 C20 concrete layer; 3.3 Crushed stone pile; 3.4 Fine pond slag backfill layer; 3.5 Road base layer; 3.6 Filling layer; 3.7 Support piers; 3.8 Non-woven geotextile; 4. Second platform; 5. Drainage well; 6. Drainage ditch; 7. Connecting pipes; 8. Retaining wall; 8.1 Mortar-grouted rubble masonry; 9. Manhole cover; 9.1 Base; 9.2 Cover body; 9.21 Installation groove; 9.22 Opening groove; 9.23 Connecting frame; 9.3 Cover plate; 9.31 Protruding section; 9.32 Rubber strip; 9.4 Sub-cover. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] like Figures 1 to 10 As shown, a municipal drainage structure includes a drainage pipe 1, an inspection well 2, and a trench 3. The drainage pipe 1 is installed on both sides of the inspection well 2. At the bottom of the trench 3, a fine pond slag bedding layer 3.1 and a C20 concrete layer 3.2 are laid in sequence. A concrete protective shell 1.1 is installed on the outer wall of the drainage pipe 1. The drainage pipe 1 is horizontally installed on the upper end of the C20 concrete layer 3.2. The lower end face of the concrete protective shell 1.1 abuts against the upper end face of the C20 concrete layer 3.2. The two sides of the drainage pipe 1 are filled with crushed stone piles 3.3. The side of the concrete protective shell 1.1 abuts against the crushed stone piles 3.3. A fine pond slag backfill layer 3.4 is laid on the upper end of the drainage pipe 1 and the crushed stone piles. A manhole 2.1 is installed at the upper end of the inspection well 2.

[0032] The manhole 2 has a spigot groove 2.2 on its wall, and the drainage pipe 1 has a rubber waterstop 1.2 on its outer wall near the manhole 2. The spigot groove 2.2 has a mating groove 2.3 on its side wall. The drainage pipe 1 is spigot-fitted into the spigot groove 2.2, and the rubber waterstop 1.2 is snapped into the mating groove 2.3. Through the mating structure of the spigot groove 2.2 and the rubber waterstop 1.2, a flexible connection and efficient waterproofing are achieved between the drainage pipe 1 and the manhole 2, reducing the risk of leakage at the interface and improving the sealing and reliability of the system.

[0033] A roadbed 3.5 is laid at the opening of trench 3. A filling layer 3.6 is filled between the roadbed 3.5 and the fine slag backfill layer 3.4. The filling layer 3.6 is backfilled with original soil, and several support piers 3.7 are set in the filling layer 3.6. The upper end of the support piers 3.7 abuts against the lower end of the roadbed 3.5. The original soil backfill layer between the roadbed 3.5 and the fine slag backfill layer 3.4 is filled with support piers 3.7. Using original soil as backfill material reduces costs, while the support piers 3.7 provide additional support to prevent the roadbed 3.5 from sinking, ensuring the smoothness and stability of the road surface and reducing the need for later maintenance.

[0034] Non-woven geotextile 3.8 is laid on the sidewalls of trench 3 and the upper end of C20 concrete layer 3.2. Laying non-woven geotextile 3.8 on the sidewalls of trench 3 and C20 concrete layer 3.2 enhances the isolation and filtration between the soil and the structural layer, prevents soil particle loss, and improves the stability and impermeability of the foundation.

[0035] The manhole 2.1 is equipped with a manhole cover 9 at the top, which facilitates daily inspection and maintenance, prevents foreign objects from falling in, and ensures smooth drainage and personnel safety.

[0036] A manhole cover 9 is installed at the upper end of the manhole 2.1. The manhole cover 9 is made of ductile iron, which has good durability. The manhole cover 9 includes a base 9.1, a cover body 9.2, and a cover plate 9.3. The base 9.1 is fixedly installed at the upper end of the manhole 2.1. The cover body 9.2 is inserted and fitted onto the base 9.1. The cover plate 9.3 has a protruding section 9.31. The cover body 9.2 has an installation groove 9.21. The protruding section 9.31 is hinged and fitted into the installation groove 9.21. The hinge connection facilitates the opening and closing of the manhole cover 9. The hinge uses a hinge-type casting as the hinge body and is equipped with a carbon steel pin and a stainless steel spring. An opening groove 9.22 is provided on the side of the cover body 9.2 away from the installation groove 9.21 to facilitate the opening of the manhole cover 9 and improve the convenience of maintenance.

[0037] A rubber strip 9.32 is filled between the cover body 9.2 and the cover plate 9.3. The rubber strip 9.32 is made of vulcanized chloroprene rubber strip 9.32, which greatly reduces the noise when the manhole cover 9 is closed and also improves the sealing performance when the manhole cover 9 is closed.

[0038] The manhole cover 9 also has a sub-cover 9.4 inside, which is also made of ductile iron material, making it highly durable. The cover body 9.2 extends towards the base 9.1 to form a connecting frame 9.23, and the sub-cover 9.4 is installed on the connecting frame 9.23. The sub-cover 9.4 inside the manhole cover 9 forms a double protective structure, further preventing debris and sewage from entering the inspection well 2, thus improving the safety and hygiene of the system.

[0039] A retaining wall 8 is installed at the outlet of the drainage pipe 1, and a masonry 8.1 inclined towards the ground is installed on the front side of the retaining wall 8. The thickness of the masonry 8.1 is 50cm. By setting the retaining wall 8 and the masonry 8.1 at the outlet of the drainage pipe 1, the water flow erosion is effectively reduced, the outlet structure is protected, the service life is extended, and the overall stability of the project is enhanced.

[0040] Example 1: When the depth of trench 3 is less than 4m, the excavation slope of the sidewall of trench 3 is 1:0.75. By reasonably setting an appropriate excavation slope according to the depth of trench 3, construction safety is ensured, earthwork volume is reduced, and construction efficiency and economy are improved.

[0041] Several drainage wells 5 are set on one side of the trench 3, with a spacing of 6m between the drainage wells 5. The opening of the drainage well 5 is 0.5m above the ground. A drainage ditch 6 is set on the side of the drainage well 5 away from the trench 3. A connecting pipe 7 is set between the drainage well 5 and the drainage ditch 6. By setting up the drainage well 5 and drainage ditch 6 system, the groundwater in the construction area is effectively removed, the water level is lowered, and dry conditions are provided for the construction of the trench 3, ensuring the construction quality.

[0042] Example 2: When the depth of trench 3 is greater than or equal to 4m and less than or equal to 6m, a two-stage slope excavation is adopted, that is, a second platform 4 is set on both sides of trench 3, and the width of the second platform 4 is 1.5m. The two-stage slope structure is reasonably set according to the depth of trench 3, which not only ensures construction safety, but also reduces the amount of earthwork, and improves construction efficiency and economy.

[0043] When the depth of trench 3 is greater than or equal to 4m and less than or equal to 6m, the drainage wells 5 are set on the second platform 4 and symmetrically set on both sides of trench 3. In the case of deep trench 3, symmetrically arranging the drainage wells 5 on the second platform 4 can further improve the drainage effect, enhance construction safety, and improve construction efficiency.

[0044] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A municipal drainage structure, characterised in that: The system includes a drainage pipe (1), an inspection well (2), and a trench (3). The drainage pipe (1) is installed on both sides of the inspection well (2). The bottom of the trench (3) is successively laid with a fine pond slag bedding layer (3.1) and a C20 concrete layer (3.2). A concrete protective shell (1.1) is installed on the outer wall of the drainage pipe (1). The drainage pipe (1) is horizontally installed on the upper end of the C20 concrete layer (3.2). The lower end of the concrete protective shell (1.1) abuts against the upper end of the C20 concrete layer (3.2). The two sides of the drainage pipe (1) are filled with piles of crushed stone (3.3). The side of the concrete protective shell (1.1) abuts against the piles of crushed stone (3.3). A fine pond slag backfill layer (3.4) is laid on the upper end of the drainage pipe (1) and the crushed stone. A manhole (2.1) is installed on the upper end of the inspection well (2).

2. A municipal drainage structure according to claim 1, wherein: The manhole (2) is provided with a spigot groove (2.2) on its wall. The drainage pipe (1) is provided with a rubber waterstop (1.2) on its outer wall near the manhole (2). The spigot groove (2.2) is provided with a mating groove (2.3) on its side wall. The drainage pipe (1) is spigot-fitted into the spigot groove (2.2), and the rubber waterstop (1.2) is snapped into the mating groove (2.3).

3. A municipal drainage structure according to claim 1, wherein: A roadbed (3.5) is laid at the opening of the trench (3). A filling layer (3.6) is filled between the roadbed (3.5) and the fine pond slag backfill layer (3.4). The filling layer (3.6) is backfilled with the original soil, and several support piers (3.7) are set in the filling layer (3.6). The upper end of the support pier (3.7) abuts against the lower end face of the roadbed (3.5).

4. A municipal drainage structure according to claim 1, wherein: Non-woven geotextile (3.8) is laid on the sidewalls of the trench (3) and the upper end of the C20 concrete layer (3.2).

5. A municipal drainage structure according to claim 1, wherein: When the depth of the trench (3) is less than 4m, the excavation slope is 1:0.75; when the depth of the trench (3) is greater than or equal to 4m and less than or equal to 6m, a two-stage slope excavation is adopted, and a second platform (4) is set on both sides of the trench (3), and the width of the second platform (4) is 1.5m.

6. A municipal drainage structure according to claim 5, wherein: A number of drainage wells (5) are provided on one side of the trench (3). The distance between the drainage wells (5) is 6m. The opening of the drainage well (5) is 0.5m above the ground. A drainage ditch (6) is provided on the side of the drainage well (5) away from the trench (3). A connecting pipe (7) is provided between the drainage well (5) and the drainage ditch (6).

7. A municipal drainage structure according to claim 6, wherein: When the depth of the trench (3) is greater than or equal to 4m and less than or equal to 6m, the drainage well (5) is set on the second platform (4) and symmetrically arranged on both sides of the trench (3).

8. A municipal drainage structure according to claim 1, wherein: A retaining wall (8) is provided at the outlet of the drainage pipe (1), and a masonry stone (8.1) inclined towards the ground is provided on the front side of the retaining wall (8), the masonry stone (8.1) being 50cm thick.

9. A municipal drainage structure according to claim 1, wherein: The manhole (2.1) is provided with a manhole cover (9) at its upper end. The manhole cover (9) is made of ductile iron. The manhole cover (9) includes a base (9.1), a cover body (9.2), and a cover plate (9.3). The base (9.1) is fixedly installed at the upper end of the manhole (2.1). The cover body (9.2) is inserted into the base (9.1). The cover plate (9.3) is provided with a protruding section (9.31). The cover body (9.2) is provided with an installation groove (9.21). The protruding section (9.31) is hinged in the installation groove (9.21). The cover body (9.2) and the cover plate (9.3) are filled with a rubber strip (9.32). The side of the cover body (9.2) away from the installation groove (9.21) is provided with an opening groove (9.22).

10. A municipal drainage structure according to claim 9, wherein: The manhole cover (9) is also provided with a sub-cover (9.4), which is also made of ductile iron. The cover body (9.2) extends toward the base (9.1) to form a connecting frame (9.23), and the sub-cover (9.4) is fitted onto the connecting frame (9.23).

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