Rainy season urban road low-lying road surface sewage well overflow prevention and control facility

Abstract

The utility model relates to a kind of rain season urban road low-lying road surface sewage well overflow prevention facilities, solve the problem of rainwater and sewage unable to be completely shunted when urban rainwater and sewage pipe network is reconstructed by objective condition, sewage pipe network congestion in rainy season, urban road low-lying place sewage well lid water problem of spouting.This facility includes the sewage well of being arranged in the urban low-lying road surface, the sewage well includes well shaft, well shaft upper end is provided with closed pressure well lid, pressure well lid upper side is provided with ordinary well lid;The top side of the well shaft is provided with high-level drainage pipeline, the high-level drainage pipeline is connected with regulating reservoir, the regulating reservoir is set in the high ground of urban low-lying road surface side, regulating reservoir bottom is provided with lifting pump, the lifting pump is connected to downstream non-low-lying place sewage well by pressure pipeline.The utility model avoids low-lying road surface sewage to spout, while setting regulating reservoir, shunt and regulate the sewage in sewage well, and play the role of adjustment between fine and rain, relieve the pressure of sewage pipe network.

Description

Technical Field

[0001] This utility model belongs to the field of municipal engineering and relates to a sewage pipeline facility in water supply and drainage, and in particular to a sewage well overflow prevention facility for low-lying urban roads during the rainy season. Background Technology

[0002] With increased emphasis on environmental protection, national and local governments have successively introduced a series of policies for the renovation and construction of sewage pipe networks. During the renovation process, some older residential areas, due to terrain and existing buildings, cannot achieve complete separation of sewer systems. Some areas still use combined sewer systems with interception, resulting in some rainwater mixing into the sewage network during the rainy season. Furthermore, some combined sewer outlets have poorly designed overflow wells, allowing river water to backflow into the sewage network during periods of high river levels. This leads to untimely drainage from the sewage network and downstream sewage pumping stations, causing sewage treatment plants to operate under overload. Urban roads, constrained by terrain, inevitably have varying elevations. During periods of heavy rainfall and high river levels, the aforementioned sewage network congestion problems can cause sewage well covers to overflow in low-lying areas, and sewage treatment plants to struggle to process wastewater in a timely manner. Utility Model Content

[0003] The purpose of this utility model is to solve the problems of sewage pipe network congestion and overflowing sewage manhole covers in low-lying urban roads during the rainy season, which are caused by objective limitations during the renovation of urban rainwater and sewage pipe networks, making it impossible to completely separate rainwater and sewage. The present invention provides a sewage manhole overflow prevention facility for low-lying urban roads during the rainy season. It uses pressure manhole covers to prevent overflowing, and during periods of heavy rainfall, it uses a storage tank to regulate the sewage manholes in low-lying areas and directly delivers the sewage to downstream non-low-lying areas through pressure pipelines. An emergency pumping port is also provided to temporarily pump out sewage using tank trucks when necessary, which greatly alleviates the problem of sewage manhole overflow in low-lying urban roads during the rainy season.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a sewage well overflow prevention facility for low-lying urban roads during the rainy season, including a sewage well installed on the road surface in a low-lying area of ​​the city. The sewage well includes a well cylinder, a closed pressure well cover installed at the upper end of the well cylinder, and an ordinary well cover installed above the pressure well cover. A high-level drainage pipe is installed on the top side of the well cylinder, and the high-level drainage pipe is connected to a regulating tank. The regulating tank is located at a high elevation on the side of the road surface in a low-lying area of ​​the city. A lift pump is installed at the bottom of the regulating tank, and the lift pump is connected to a downstream sewage well in a non-low-lying area through a pressure pipe.

[0005] This device can be modified based on existing sewage wells. The upper part of the original sewage well shaft is chiseled and replaced with a reinforced precast shaft. The reinforced precast shaft is made of high-strength reinforced concrete, which has stronger compressive and crack resistance. The pressure-bearing capacity is further enhanced by a cast-in-place concrete encapsulation layer on the outside of the reinforced precast shaft. The manhole cover is a double-layer cover: the lower layer is a pressure cover bolted to the reinforced precast shaft, and the upper layer is a regular manhole cover flush with the road surface. This device is equipped with an elevated diversion pipeline connected to a storage tank. The storage tank can be set in other locations such as green belts or landscaping features on the side of the road. The height of the storage tank is not limited by the road surface elevation and can be higher than the overflow water level to ensure storage capacity. When the water level in the storage tank is low, the lift pump does not start. When the water level in the storage tank exceeds a set threshold, the lift pump starts (the threshold is set based on the height of the outlet end of the elevated diversion pipeline, which can be set to be 50-200cm lower than the outlet of the elevated diversion pipeline). The sewage in the storage tank is pressurized by a booster pump and transported directly to downstream sewage wells in non-low-lying areas via pressure pipelines. The storage tank maintains a high water level when the sewage network pressure is high; when rainfall decreases and the sewage network pressure is low, the water in the storage tank is drained. When downstream sewage wells in non-low-lying areas are overloaded, or when the water level in the storage tank approaches or exceeds the high-level diversion pipeline, tank trucks are used to urgently pump water from the storage tank's emergency discharge port, transporting it to a more distant sewage treatment plant with lower pressure, or discharging it into a river.

[0006] Preferably, the regulating reservoir is located in the green belt or landscape facility on the side of the road in a low-lying area of ​​the city. The regulating reservoir is buried in the soil or the upper platform is exposed on the soil. The top height of the regulating reservoir is not lower than the pressure well cover and not lower than the flood water level.

[0007] Preferably, the top of the storage tank is provided with an emergency drainage port, and a tanker truck parking platform is provided on the side of the emergency drainage port on the top of the storage tank.

[0008] Preferably, a first water level gauge is installed at the top of the sewage well, a second water level gauge is installed at the top of the regulating tank, and a control valve is installed on the elevated diversion pipe, which is bidirectionally controlled by the first and second water level gauges. When the first water level gauge detects that the water level in the sewage well is higher than that in the elevated diversion pipe, the control valve is opened; when the second water level gauge detects that the water level in the regulating tank is higher than that in the elevated diversion pipe, the control valve is closed to prevent backflow.

[0009] Preferably, the well casing includes the original well casing and a reinforced prefabricated well casing set on top of the original well casing, wherein bolts for fixing the pressure well cover are pre-embedded in the reinforced prefabricated well casing.

[0010] Preferably, a concrete encapsulation layer is provided on the outer circumference of the reinforced precast well shaft and the outer circumference of the top of the original well shaft. The height of the concrete encapsulation layer is more than 1.8 times the height of the reinforced precast well shaft, and the thickness of the concrete encapsulation layer is not less than 400 mm.

[0011] Preferably, the upper surface of the concrete encapsulation layer is flush with the upper surface of the reinforced precast shaft.

[0012] Preferably, the ordinary manhole cover is flush with the road surface in the low-lying area of ​​the city, and the ordinary manhole cover is provided with a cover ring that is embedded in the road surface in the low-lying area of ​​the city, and an adjustment pad is provided below the cover ring.

[0013] This utility model uses a closed pressure manhole cover in low-lying sections of urban roads, so that the sewage well in this section can act as a closed pipe when under high load, preventing sewage from overflowing. At the same time, the reinforced well cylinder and the encapsulation structure ensure structural safety and prevent cracking. A storage tank is set on the side of the low-lying section where it is not limited by the road surface elevation, so as to divert and store the sewage in the sewage well and play a regulating role between sunny and rainy weather, thereby relieving the pressure on the sewage pipe network. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the overall facility structure of this utility model.

[0016] Figure 2 This is a schematic diagram of a sewage well structure according to the present invention.

[0017] In the diagram: 1. Sewage well, 2. Double-layer manhole cover, 3. Road surface in a low-lying area of ​​the city, 4. First water level gauge, 5. High-level diversion pipeline, 6. Control valve, 7. Storage tank, 8. Second water level gauge, 9. Emergency pumping outlet, 10. Landscape facility, 11. Booster pump, 12. Pressure pipeline, 13. Original manhole, 14. Reinforced precast manhole, 15. Concrete encapsulation layer, 16. Pressure manhole cover, 17. Ordinary manhole cover. Detailed Implementation

[0018] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0019] Example: A sewage well overflow prevention facility for low-lying urban roads during the rainy season. This facility is a modification of the existing sewage well 1 on the existing low-lying urban road surface 3. The sewage well 1 includes a well cylinder with a double-layered cover at the top, including a sealed pressure cover 16 and a regular cover 17 above the pressure cover. The regular cover 17 is flush with the urban low-lying road surface 3 and has a cover ring embedded in the road surface. An adjusting pad is installed below the cover ring to prevent uneven settlement. A high-level drainage pipe 5 is installed on the top side of the well cylinder, and the high-level drainage pipe 5 is connected to a storage tank 7. The storage tank is located on higher ground on the side of the urban low-lying road surface. In this example, the storage tank 7 is located in a higher landscape facility on the side of the road, and the height of the storage tank is not limited by the road surface elevation. The top height of the storage tank 7 is not lower than the pressure cover and not lower than the flood level. An emergency drainage port 9 is provided at the top of the regulating tank 7, and a tanker truck parking platform is provided on the side of the emergency drainage port at the top of the regulating tank. A booster pump 11 is provided at the bottom of the regulating tank 7, and the booster pump is connected to a sewage well in a non-low-lying area downstream through a pressure pipeline 12. A first water level gauge 4 is provided at the top of the sewage well 1, and a second water level gauge 8 is provided at the top of the regulating tank. The high-level diversion pipeline is equipped with a control valve 6 that is bidirectionally controlled by the first water level gauge and the second water level gauge.

[0020] This pollution control facility is based on the renovation of the original sewage well. The sewage well includes the original well shaft 13 and a reinforced precast well shaft 14 located on top of the original well shaft. Bolts for fixing the pressure well cover 16 are pre-embedded in the reinforced precast well shaft. A concrete encapsulation layer 15 is provided around the outer circumference of the reinforced precast well shaft and the outer circumference of the top of the original well shaft. The concrete encapsulation layer 15 is made of C30 concrete. In this example, the inner diameter of the original well shaft 13 and the reinforced precast well shaft 14 is the same, both 700mm. The wall thickness of the original well shaft 13 is 240mm, and the wall thickness of the reinforced precast well shaft 14 is 300mm, with a height of 300mm. The height of the concrete encapsulation layer 15 is 800mm, and the thickness of the concrete encapsulation layer is 500mm. The upper surface of the concrete encapsulation layer 15 is flush with the upper surface of the reinforced precast well shaft 14. A high-level drainage pipe is located on one side of the top of the original well shaft.

Claims

1. A rain season urban road low-lying road surface sewage well overflow prevention and control facility, comprising a sewage well arranged on a low-lying road surface of a city, characterized in that: The sewage well includes a well shaft with a closed pressure well cover at the top and a regular well cover above the pressure well cover. A high-level drainage pipe is installed on the top side of the well shaft, and the high-level drainage pipe is connected to a storage tank. The storage tank is located on a high ground on the side of the road in a low-lying area of ​​the city. A lift pump is installed at the bottom of the storage tank, and the lift pump is connected to a sewage well in a non-low-lying area downstream through a pressure pipe.

2. The rain season urban road low-lying road surface sewage well overflow prevention and control facility according to claim 1, characterized in that: The storage tank is located in the green belt or landscape facility on the side of the road in the low-lying area of ​​the city. The storage tank is buried in the soil or the upper platform is exposed on the soil. The top height of the storage tank is not lower than the pressure well cover and not lower than the flood water level.

3. The rain season urban road low-lying road surface sewage well overflow prevention and control facility according to claim 1, characterized in that: An emergency drainage port is provided at the top of the storage tank, and a tanker truck parking platform is provided on the side of the emergency drainage port at the top of the storage tank.

4. The rain season urban road low-lying road surface sewage well overflow prevention and control facility according to claim 1, characterized in that: The top of the sewage well is equipped with a first water level gauge, the top of the regulating tank is equipped with a second water level gauge, and the high-level diversion pipe is equipped with a control valve that is bidirectionally controlled by the first water level gauge and the second water level gauge.

5. The rain season urban road low-lying road surface sewage well overflow prevention and control facility according to claim 1, characterized in that: The well casing includes the original well casing and a reinforced prefabricated well casing set on top of the original well casing. The reinforced prefabricated well casing has bolts embedded in it to fix the pressure well cover.

6. The rain season urban road low-lying road surface sewage well overflow prevention and control facility according to claim 5, characterized in that: A concrete encapsulation layer is provided around the outer perimeter of the reinforced precast well shaft and around the outer perimeter of the top of the original well shaft. The height of the concrete encapsulation layer is more than 1.8 times the height of the reinforced precast well shaft, and the thickness of the concrete encapsulation layer is not less than 400 mm.

7. The rain season urban road low-lying road surface sewage well overflow prevention and control facility according to claim 6, characterized in that: The upper surface of the concrete encapsulation layer is flush with the upper surface of the reinforced precast shaft.

8. The rain season urban road low-lying road surface sewage well overflow prevention and control facility according to claim 1, characterized in that: The ordinary manhole cover is flush with the road surface in the low-lying area of ​​the city. The ordinary manhole cover is provided with a cover ring that is embedded in the road surface in the low-lying area of ​​the city, and an adjustment pad is provided below the cover ring.

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