1. Set up a retention pond method
Principle: In this method, a retention pond is used in the sewage discharge system to block the substances that are simply deposited in the sewage, in order to prevent pipeline blockage caused by the decrease of the slope of the pipeline and the decrease of the flow velocity. The value of degree is used to reduce the buried depth of the cement pipeline. In detailed planning, a general septic tank can be used as a retention pond. Because the trapping pond mainly blocks the easy sediment in the sewage and does not need anaerobic fermentation to purify the sewage, the volume of the sewage part can be 1/3 of the normal septic tank when the capacity is calculated, and the volume of the entire trapping tank is about normal 1/2 of the septic tank. When planning the sewage pipeline, the slope of the pipeline in front of the retention pond cannot be reduced. The value of the minimum planned flow velocity and the minimum planned slope of the sewage pipeline after the siltation prevention treatment of the retention pond can be reduced by a hundred percent compared with the minimum value specified in the standard. 20-30%. This method is applicable to residential districts or factory areas where the terrain is flat and the starting point (control point) of the pipeline is far from the access point of the municipal sewage pipe network.
2. Overflow well discharge method
Principle: The sewage is discharged into the municipal sewage pipe through the overflow well first, and the pump is used as a supplement to remove the accumulated water in the overflow well and the upstream sewage pipe. The flow rate should be determined by draining all the accumulated water within 30 minutes. In order to reduce operating costs, a sewage pump can be started before daily peak water use to drain the water in overflow wells and upstream pipelines. In this way, it can prevent sewage from staying in the pipeline for a long time and form siltation, and often the flushing pipe section is washed away, which is beneficial to the ventilation of the pipeline and the removal of harmful gases in the pipeline. When planning a cement pipeline system, the slope of the cement pipeline above the overflow water level should be minimized to reduce the length of the water accumulation pipe section and the amount of water accumulated in the drainage system, and the slope of the cement pipeline below the overflow water level cannot be too large. Small, should ensure that the water flow has a certain scouring strength to the pipeline when the pipeline is idle. This method is applicable to the control point of the cement pipeline that is closer to the access point of the municipal cement pipeline network. The first method is still unable to make the residential cement pipeline connect to the municipal pipeline network, and the residential district or factory area with a small plan is also applicable. For rainwater drainage systems. When used in the rainwater drainage system, rainwater is discharged through overflow wells, and the rainwater pump is opened only after each rain and when the pipeline needs to be dredged and protected, so as to remove the accumulated water in the pipeline.
3. Pipeline penetration
Principle: When the cement pipeline is buried when it encounters the current pipeline or the storm sewer is interspersed, the pipeline penetration method is used, which can reduce the depth of the pipeline and is not easy to block. The principle of this method is shown in Figure 2.A check well is set at the pipe crossing to allow another pipe to pass through the well.The key is to ensure that the water passing area (the area of the shadow in the figure) in the well is greater than or equal to that of the pipe being penetrated. The cross-sectional area and the size of the water passing area in the well can be controlled by the size of the through-hole inspection well. The principle of pipe running is that small pipes run through large pipes, and current pipes run through planned pipes.
1. According to the standard construction, clean the mouth, chisel, grout, grout, joint, and compact. The foundation should also be done well, after the interface should pay attention to maintenance, and later care is also critical.
2. Plug the bitumen with bitumen, apply a layer of asphalt on its surface, and then wrap it with linoleum within a certain width of the seam opening, and then apply a layer of asphalt. The highway culvert is basically handled this way.
3, depending on whether you are a mouth pipe or a flat mouth pipe, to ensure that there is no water leakage, the same foundation must be done well. You can pour the concrete cushion first and then install the pipe. The butt joints are flat. The socket pipe should be filled with a proper amount of mortar at the lower mouth of the pipe to ensure that the width around the mouth is common. Plug seams to block the seams and close the pipe tightly. The pipe is sealed with a seal at the seam of the pipe, which is a standard operation. As long as the construction is strictly performed according to the construction operation standard, leakage can be reduced. In order to be 100% watertight, it is necessary to choose a flexible interface, that is, a rubber strip rubber ring interface for the cement pipe. The rubber ring is acquired from the supplier when the cement pipe can be purchased.
After the above article, we trust that we can also learn about several landfill methods for cement pipes. Although there are many types of pipes, cement pipes are still the mainstream products on the market today. In order to rely on technological progress and innovation, the cement pipe industry will inevitably develop new types of cement pipes, which will better promote the pace of urban construction and increase the development prospects of the cement pipe industry.