1, the characteristics of municipal sewage pipe network engineering
(1) are mostly located beside urban buildings, close to both sides of roads, and there are many pedestrians coming and going. (2) The underground pipelines are intertwined, and there are many sundries and obstacles on the ground, which requires efficient cooperation. (3) Because the sewage is basically discharged by itself, the requirements for the sewage pipe network are correspondingly high. (4) The trench of sewage pipe network is deep, which will be influenced by many external factors. (5) There are many harmful substances in urban sewage. If it leaks, it will threaten urban water use. Therefore, the sealing requirements for sewage pipes are relatively strict. (6) In most cases, the sewage pipe network project is called extending the original sidewalk or setting it at the lower part of the sidewalk. The purpose of this is to effectively prevent the ground from sinking, so in the process of specific construction, the requirements for backfill soil are also very strict.
2. Problems existing in the construction of municipal sewage pipe network
In the process of sewage pipe network construction, it will be affected by various uncertain factors, which will lead to the decline of construction quality, which is very unfavorable to ensure the construction of municipal sewage pipe network. We must make a detailed analysis, analyze the problems and reasons in time, and then formulate effective measures to solve them, so as to fully ensure the quality of sewage pipe network construction to the maximum extent, thus providing a good guarantee for people's lifestyle and living conditions. In the concrete construction process of municipal sewage pipe network, because the construction features are located on both sides of urban roads, which are very complicated and close to many buildings, there are many people coming and going, which correspondingly affects the construction of municipal sewage pipe network and ultimately affects the quality of the whole project construction.
Under normal circumstances, the sewage pipe network is set under the road, the line is relatively long, and the obstacles on the ground are also very complicated, so it is impossible to carry out all-round cleaning work well and affect the construction. In addition, the complexity of underground pipelines also increases the workload of construction personnel; Because sewage is generally discharged by gravity, the requirements for sewage pipe network are extremely strict. Usually, the construction technology can't reach the corresponding goal, which will not only increase the workload of construction workers, but also lead to the lag of construction progress.
3, municipal sewage pipe network engineering construction and management
3. 1, pipeline selection
Before the formal construction, the pipeline should be optimized according to the actual situation. For a long time, most sewage pipe networks in China have been constructed with reinforced concrete pipes. Objectively speaking, the main advantages of this kind of pipe are strong plasticity and low cost, but the effect is poor in practical application. In the process of continuous implementation of social development, all kinds of new pipes appearing in the market today, such as glass fiber reinforced plastic sand-filled pipes and HDPE wound pipes, are mainly made of high-density polyethylene.
3.2, preliminary preparation
Before construction, it is necessary to conduct a comprehensive analysis and investigation of the actual situation of the construction site, and design and formulate the corresponding construction procedures strictly according to the final results. First, the municipal underground pipe network is complex, which has the criticism of affecting the whole body, so before construction, it is necessary to formulate an effective plan in combination with the actual situation; Second, the construction of municipal sewage pipe network will affect the surrounding traffic and communication systems. In this case, it is necessary for corresponding technicians to increase the intensity and scope of research to prevent various unfavorable factors from happening to the maximum extent.
3.3, trench excavation
In the process of sewage pipe network construction, trench excavation is a very important item, and its construction quality is directly related to the installation quality of the pipeline. First of all, trench excavation should be carried out scientifically and reasonably according to the specific parts of trench layout to avoid mistakes. Secondly, in the process of toy construction with excavator, a soil layer with a thickness of 15 ~ 20 cm should be reserved for manual excavation to prevent the trench from being affected. Finally, in the specific construction process, the center line and elevation should be checked with compass, level meter and other instruments to ensure that the construction is fully implemented within the controllable range to the maximum extent.
3.4, pipeline installation
Generally, there are two kinds of pipe installation. In the construction of double-walled corrugated pipe, the installation and construction are mainly carried out according to the principle from downstream to upstream, and the corresponding protection rings are placed. In addition, lubricants are applied to the interface. In the specific installation process, it is necessary to constantly optimize and solve any problems in time to ensure that the center line of the pipeline is always consistent with the center line. In view of the cement pipe construction, it is mainly necessary to hoist the pipe into the groove first, and reserve a 10mm expansion joint between the pipes, and adjust the parts of the pipe in time according to the center line to ensure that the center line of the pipe is always consistent with the center line. The construction of sewage pipelines is basically carried out underground. Therefore, in the construction process, the pipeline must have excellent durability, must bear all the pressure from the ground, in addition, it must also ensure strong corrosion resistance and frost resistance in complex construction environment.
3.5, closed water test
In the process of municipal sewage pipe network construction, after the pipeline is buried, necessary tests must be carried out to fully ensure the smoothness and safety of the pipeline. If there is a problem, it is necessary to analyze the reasons in time and formulate practical preventive measures. In other words, a closed water test is needed. In the specific testing process, the focus should be on the "obstruction" of water flow. When designing the pipeline scientifically and reasonably, the water flow in the pipeline must be smooth. In addition, the safety of the pipeline must be paid full attention to, and all inspections must be carried out, especially for the interface parts of the pipeline, to ensure that no water will leak. In a word, the sewage pipe network project is the key part of all public works in the city at present, and it is also the basis to ensure the safe and orderly operation of various functions in the city. The quality of sewage pipe network construction is directly related to the life of the whole city residents. More importantly, it is also closely related to the image and environment of the city and is the key to municipal engineering. Therefore, the research of this paper is very meaningful.
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