What are the key points to pay attention to when constructing water supply and drainage pipelines in municipal projects?

With the continuous development of my country's social economy, the urbanization process of various provinces and cities in the country is also constantly advancing, and the urban population is also increasing. This not only brings unlimited power to the rapidly developing economy and society and opportunities, and at the same time, urban ecological environment problems have gradually surfaced. As one of the most important urban municipal infrastructures in the construction of modern cities, the water supply and drainage pipeline system can not only make an important contribution to the prevention and control of urban water pollution, but is also the backbone of urban flood control and drainage. Therefore, during the construction of municipal engineering water supply and drainage pipeline systems, how to ensure that they meet relevant specifications and technical requirements while also completing comprehensive and systematic quality control has become a must for relevant personnel currently engaged in this work. One of the important problems to be solved is that only by mastering and strictly implementing the technical points of construction of municipal water supply and drainage pipeline projects can construction quality and safety be guaranteed. The following is an introduction to the main points of attention in the construction of water supply and drainage pipelines in municipal projects brought by Zhongda Consulting for reference.

1 The role of urban water supply and drainage pipeline systems and the current situation of urban water supply and drainage pipeline systems in my country

Because urban water supply and drainage pipeline systems can not only make important contributions to the prevention and control of urban water pollution, It is also the backbone of urban flood control and drainage. A long time ago, some countries and regions in Europe and the United States have popularized complete urban water supply and drainage pipeline systems and urban sewage treatment plants. However, due to the late start of urban infrastructure construction in my country and its backward development, the water supply and drainage pipeline systems and urban sewage treatment plants in many cities Factory construction lags even further behind. During the flood season, many big cities turn into vast oceans. Many netizens call it "a city looking at the sea." In fact, this is just a very bitter joke. "If people don't give water a way out, water will be destroyed." "There is no way for people to live." Therefore, the serious water pollution and the current situation of flood control and drainage difficulties force us to step up the construction of urban water supply and drainage pipeline systems, because only by improving the urban water supply and drainage construction can we timely and effectively drain the city. Various types of sewage in the area (domestic sewage, industrial production wastewater, precipitation, etc.) prevent the city from being intruded by sewage and floods caused by heavy rains, thereby providing the people with a warm, comfortable and safe ecological environment for living, living and production.

2 Analysis of quality control points in the construction of municipal water supply and drainage pipelines

For any construction operation, the quality control link is an important symbol to weigh the quality level of the entire project. Therefore, quality control is also one of the crucial links in the construction of municipal engineering water supply and drainage pipeline systems. Municipal engineering water supply and drainage pipeline systems are an extremely complex and cumbersome comprehensive project for construction operations. The quality of each link Control is very important. Once quality problems occur in any link of construction, it will have a profound impact on the entire water supply and drainage pipeline system. Below we will discuss the following aspects of quality control points in the construction of municipal water supply and drainage pipelines: Analysis:

2.1 Trench excavation and support construction

Before trench excavation, the specific locations of existing underground cables, pipelines and other structures should first be determined. , and send the specific verification results and treatment plans to the relevant units or owners for confirmation to ensure the continuity of the excavation work; secondly, if the construction is in the rainy season or in areas with high groundwater levels, attention should be paid to timely adoption of drainage measures to ensure vigilance water level.

2.2 Pipe foundation production and construction

When making and constructing pipe foundations, you should first consider issues such as construction climate, soil maintenance, and concrete transportation. According to practical experience, it may be possible to pass Use certain piling measures to improve the strength of concrete, or add early strength agents. In short, the entire pipe base must reach a certain strength before the pipe can be installed.

2.3 Pipe installation and construction

First of all, before installing pipes in the project, you should check whether there is any possibility of penetration of the pipes (such as cracks, holes, etc.); The centerline and sideline data of the pipe base will be surveyed again to ensure that all parameters can meet national standards after the construction of the pipe.

2.4 Construction of inspection wells

When building inspection wells, first of all, attention should be paid to making the mortar full and the flow channel unobstructed. Secondly, attention should also be paid to whether the dimensions of the well wall meet national requirements. The bottom, well bottom and manhole cover must be operated strictly according to the elevation designed on the drawings, and we must try our best to prevent water seepage, water accumulation or backflow during water inspection.

2.5 Trench backfilling construction

Trench backfilling work must be completed after the above-mentioned work has been accepted. During construction, be sure to pay attention to the tops of buildings and drainage pipes. When there is a road surface, you must first pay attention to the layered compaction method when backfilling. Especially for silt, frozen soil and humus soil, remember not to backfill the soil at this time.

2.6 Prevention of water accumulation in pipelines

Research has found that most of the position deviation or water accumulation failures in the construction of water supply and drainage pipelines in municipal projects are caused by human factors during the design and measurement process. It is caused by three factors: errors, construction distortion, or water supply and drainage pipes avoiding existing buildings. What this brings us is that the water supply and drainage pipeline system needs to pay special attention to the retesting and protection of the handover piles in the early stage of construction. At the same time, special attention needs to be paid to the axis and longitudinal slope measurement and inspection of the trench and flat foundation during pipe construction. When the construction of water supply and drainage pipelines has to avoid existing buildings, relevant personnel should add connecting wells at appropriate locations. And control the connecting well turning angle to 135° or above.

3 Quality control points on common problems in the construction of water supply and drainage pipelines in municipal projects

Common problems during the construction of water supply and drainage pipeline systems in municipal projects are the deformation or sinking of inspection wells and the position of the pipelines Offset or water accumulation, etc. The main reason for such problems is that the construction was not carried out in strict accordance with the design parameters during construction, which led to the occurrence of such problems. Therefore, during construction, we must pay attention to strict control and repeated inspection of each link of construction. , prevent and eliminate problems. For the problems of pipeline position deviation and water accumulation, timely monitoring is required. During the construction process, protection and handover pile re-testing must be done, and special attention must be paid to the longitudinal slope measurement and trench inspection of the pipeline. If the water supply and drainage pipeline When construction needs to avoid existing buildings, relevant personnel need to set up connecting wells and control the angle of the connecting well corners. During the construction of water supply and drainage pipelines, technicians need to detect the inspection well in a timely manner and comprehensively inspect all its parts. Pay special attention to the wellhead position and other parameters to avoid deformation due to incomplete inspection.

The construction quality control of water supply and drainage pipelines in municipal projects has a direct impact on people’s production and life. In production, life and social construction, water supply and drainage are inseparable. If there are problems with water supply and drainage, it will inevitably affect people’s production and life. adversely affect their lives. The water supply and drainage structure is very complex and requires reasonable control of each part to ensure the construction quality of the water supply and drainage pipelines to the greatest extent.

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