The use of cement pipes in urban underground systems is essential. Because cement pipes are buried underground. Therefore, it is also necessary to pay attention to some problems when it is buried. If the buried pipe is deep, other aspects such as underground pressure will affect the cement pipe, and the same will be true if it is shallow. The editor of the cement pipe manufacturer below will popularize how to deal with the problem of pipeline depth in the planning of cement pipes.
Pipeline penetration method: In principle, when a cement pipeline is buried when it encounters the current pipeline or rainwater and sewage pipes are interspersed, the pipeline penetration method is used, which can reduce the buried depth of the pipeline and is not easy to block. An inspection well is set up at the pipe penetration point to allow another pipeline to pass through the well. The key is to ensure that the water passing area in the well is greater than or equal to the cross-sectional area of the pipe being passed. The size of the water passing area in the well can be set through the pipe inspection well. Size to control. The principle of pipe running is that small pipes run through large pipes, and current pipes run through planned pipes.
Set up trap tank method: Principle. This method uses a trap tank in the sewage discharge system to block the substances that are easily deposited in the sewage to prevent pipeline blockage caused by the decrease of the slope of the pipeline and the decrease of the flow rate. Then, the planned flow rate of the cement pipeline is reduced as appropriate. And planning slope value to achieve the intention of reducing the buried depth of the cement pipeline. In detailed planning, ordinary septic tanks can be used as retention ponds.
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 normalized. 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 planned flow velocity and the planned slope of the sewage pipeline after the anti-fouling treatment of the retention pond can be reduced by 20% to 30 compared with the value specified in the specification. %. This method is suitable for a residential area or a factory with a flat terrain and a long distance between the starting point (control point) of the pipeline and the access point of the municipal sewage pipe network.
Overflow well discharge method: Principle, the sewage is mainly discharged into the municipal sewage pipe through the overflow well, 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 discharged within 30 minutes. All stagnant water is confirmed. In order to reduce operating costs, a sewage booster pump can be started before daily peak water use to drain the water in overflow wells and upstream pipelines. In this way, the sewage can be prevented from staying in the pipeline for a long time and siltation can be formed, and the accumulated water pipe section is often 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. The slope of the cement pipeline below the overflow water level should not be too large. Small, it should be ensured that when the pipeline is evacuated, the water flow has a certain scouring strength to the pipeline. This method is applicable to the control points of cement pipelines that are close to the access points of the municipal cement pipeline network. If the first method is selected, the residential cement pipelines cannot be connected to the municipal pipeline network, and the small-scale residential districts or factories are also applicable together. For rainwater drainage systems. When used in a rainwater drainage system, rainwater is discharged through overflow wells. 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.