CN205296346U - Sewer line air supply precipitation structure - Google Patents

Abstract

The utility model discloses an air supply and dewatering structure for a sewage pipeline, which comprises a sewage pipeline, the length direction of the sewage pipeline is taken as the front and rear direction, and several inspection wells are arranged at intervals in the front and rear direction of the sewage pipeline; There is a blower; along the length of the sewage pipeline, there is a dewatering well every 20 meters. The average diameter of the dewatering well is 500 mm and the depth is 20 meters; surface. The utility model is simple in structure, easy to use, can create a safe and healthy air environment in the sewage pipeline, and lower the water level of the groundwater in the sewage pipeline, so that construction personnel can clean up the dirt in the well, find and mark the leakage point and block the pipeline. Create conditions for leaky construction.

Description

Sewage pipe air supply and precipitation structure

technical field

The utility model relates to the technical field of construction, in particular to a waterproof and leak-remedial project of municipal underground pipe networks.

Background technique

The urban sewage pipe network includes sewage pipes buried underground. There are several inspection wells at intervals along the length of the sewage pipes. Adjacent inspection wells are generally separated by hundreds of meters (such as 500 meters).

After long-term use of sewage pipes, a large amount of dirt is easy to deposit in them, and the pipes may be partially cracked. Sewage pipes are generally connected by multi-section pipes, and the joints of pipes are also prone to poor sealing after long-term use. In the case of a high urban groundwater level, groundwater will seep into the sewage pipes through damaged pipes and poorly sealed pipe joints. On the one hand, groundwater is wasted, and on the other hand, the workload of sewage treatment plants is greatly increased. Cause waste of manpower and material resources. Due to the limited processing capacity of the sewage treatment plant, in rainy weather or peak periods of residential water use, the sewage that cannot be treated in time will overflow to the road along the inspection well and other parts after being mixed with groundwater, affecting normal traffic in the city. The sewage in some sewage pipes will also pollute groundwater through leakage points, causing adverse effects on the environment.

At present, for the treatment of pipeline leakage water, the easy-to-think method is to line the sewage pipeline with HDPE pipe or stainless steel pipe to prevent leakage. The disadvantages of this method are:

1. High cost. HDPE pipes and stainless steel pipes have higher costs and higher construction costs.

2. After lining the pipeline, it means that the original sewage pipeline is abandoned, resulting in waste of resources; and the diameter of the lining pipe must be smaller than the diameter of the original sewage pipeline, resulting in the actual diameter of the sewage pipeline shrinking, which does not conform to the design of the original sewage pipeline Require.

3. There is no protection for the sewage pipeline, and it cannot cope with the damage caused by the stress change of the stratum structure to the sewage pipeline.

If the inherent thinking of the inner liner is discarded, and the groundbreaking method of internal plugging and external grouting is used for construction, the above shortcomings can be overcome. However, the method of internal plugging and external grouting needs to improve the air condition in the sewage pipe and dewater the surrounding area of the sewage pipe. Therefore, the technical field needs a simple and practical sewage pipeline air supply and precipitation structure.

Utility model content

The purpose of the utility model is to provide an air supply and dewatering structure for sewage pipelines, which can effectively supply air to the sewage pipelines and reduce the water level of groundwater at the sewage pipelines.

In order to achieve the above object, the sewage pipeline air supply and dewatering structure of the present utility model includes a sewage pipeline, and the length direction of the sewage pipeline is the front and rear direction, and the sewage pipeline is provided with several inspection wells at intervals in the front and rear direction; the wellhead of the inspection well is Provided with blower;

Along the length of the sewage pipeline, there is a dewatering well every 20 meters. The average diameter of the dewatering well is 500 mm and the depth is 20 meters. A submersible sewage pump is installed at the bottom of the dewatering well, and the outlet pipe of the submersible sewage pump leads to the surface along the dewatering well.

The outlet pipe of the submersible sewage pump communicates with the municipal rainwater pipe network through a connecting water pipe.

The air inlet of the air blower is set upward and higher than the wellhead of the inspection well; the air outlet of the air blower is downward and located in the inspection well; the air inlet of the air blower is provided with a filter screen.

The utility model has the following advantages:

The utility model is simple in structure, easy to use, can create a safe and healthy air environment in the sewage pipeline, and lower the water level of the groundwater in the sewage pipeline, so that construction personnel can clean up the dirt in the well, find and mark the leakage point and block the pipeline. Create conditions for leaky construction.

The interval between the precipitation wells is 20 meters, which not only ensures that the groundwater level near the sewage pipe between the two precipitation wells can be effectively reduced (if the interval is too long, the groundwater level at the middle point of the two precipitation wells cannot be effectively reduced ), taking into account the construction efficiency (if the interval between the precipitation wells is too short, the construction efficiency will decrease). The average diameter of the precipitation wells is 500 mm and the depth is 20 meters, which is not only convenient for construction, but also can ensure the precipitation effect.

During the air supply process, the sundries in the ground air will be blocked by the filter and will not be sent into the sewage pipe through the inspection well. On the one hand, the blower is protected, and on the other hand, it is also prevented from entering the sewage pipe for underground construction. Operation is inconvenient.

Description of drawings

Fig. 1 is a vertical sectional schematic view of the utility model;

Fig. 2 is a schematic top view of the air blower.

detailed description

As shown in Figure 1 and Figure 2, the sewage pipeline air supply and dewatering structure of the present utility model comprises a sewage pipeline 1, with the length direction of the sewage pipeline 1 as the front and rear direction, the sewage pipeline 1 is provided with several inspection wells 2 at intervals in the front and rear direction ; The wellhead of the inspection well 2 is provided with a blower 3;

Along the sewer pipe 1 length direction, every 20 meters is provided with a dewatering well 4, and the average diameter of the dewatering well 4 is 500 millimeters and 20 meters deep; The precipitation well 4 leads to the surface.

The outlet pipe 6 of the submersible sewage pump 5 is connected to the municipal rainwater pipe network 8 through the connecting water pipe 7, so that the groundwater around the sewage pipe 1 is pumped out and sent to the rainwater pipe network 8, so as to avoid draining water to the surface to the vicinity of the sewage pipe network Pollution is formed on the ground, and water on the road is prevented from hindering traffic or construction.

The air inlet 9 of the blower 3 is set upward and higher than the wellhead of the inspection well 2; the air outlet 10 of the blower 3 is downward and located in the inspection well 2; the air inlet 9 of the blower 3 is provided with a filter screen 11. The blower 3 is preferably an axial flow fan.

When in use, the air blower 3 is turned on, and the fresh air on the ground is sent into the sewage pipeline 1 through the inspection well 2, so as to improve the air condition in the sewage pipeline 1, thereby creating a safe air environment for the staff to work in the well. Turn on the submersible sewage pump 5, send the groundwater at the sewage pipeline 1 along the dewatering well 4, and finally send it into the municipal rainwater pipe network 8, thereby reducing the groundwater level at the sewage pipeline 1, so that the groundwater no longer submerges the sewage pipeline 1. Carry out plugging operation in sewage pipeline 1 to create conditions (if the seepage point is leaking all the time, will bring difficulty to plugging operation). The extracted groundwater is sent into the municipal rainwater pipe network 8 to prevent the water from being drained to the surface to pollute the ground near the sewage pipe network, and to prevent road accumulation from hindering traffic or construction. During the air supply process, the sundries in the air on the ground will be blocked by the filter screen 11, and will not be sent into the sewage pipe 1 through the inspection well 2. On the one hand, the air blower 3 is protected, and on the other hand, sundries are prevented from entering the sewage pipe. 1 brings inconvenience to the construction operation in the well.

Claims (3)

1. The sewage pipeline air supply and dewatering structure, including the sewage pipeline, takes the length direction of the sewage pipeline as the front and rear direction, and the sewage pipeline is provided with several inspection wells at intervals in the front and rear direction; it is characterized in that: the wellhead of the inspection well is provided with Blower; Along the length of the sewage pipeline, there is a dewatering well every 20 meters. The average diameter of the dewatering well is 500 mm and the depth is 20 meters. A submersible sewage pump is installed at the bottom of the dewatering well, and the outlet pipe of the submersible sewage pump leads to the surface along the dewatering well. 2. The sewage pipeline air supply and dewatering structure according to claim 1, characterized in that: the outlet pipe of the submersible sewage pump communicates with the municipal rainwater pipe network through a connecting water pipe. 3. The sewage pipe air supply and precipitation structure according to claim 1 or 2, characterized in that: the air inlet of the blower is set upward and higher than the wellhead of the inspection well; the air outlet of the blower is downward and located in the inspection well In the well; the air inlet of the blower is provided with a filter screen.