1, investigation of drainage pipe network
1. 1, endoscopic camera detection.
This detection method mainly uses the camera equipment installed inside the pipeline to conduct a comprehensive camera detection of its internal environment, and the professional makes a detailed evaluation and analysis of the detection results, thus making an accurate judgment on the current situation of the drainage pipeline. This is also the most advanced drainage pipe network survey method in the world at present. In Shanghai, Beijing, Guangzhou and other big cities in China, this technology has been used to reasonably transform pipelines, but its disadvantage is that there are some limitations in the use process.
1.2, road patrol
In general, the drainage pipes extend along expressway, so the problems in the drainage pipes can be detected on the road surface, but this method is not used in the detection of drainage pipes in big cities.
1.3, the maintenance unit was investigated.
Most domestic municipal drainage pipelines have special maintenance companies. A comprehensive understanding of the specific situation of municipal drainage pipelines can be achieved through visits and exchanges with employees of the company. Although this way is the lowest way to understand pipeline maintenance information, it has to be said that it is a feasible way.
2, municipal drainage pipeline reconstruction design points
2. 1, pipeline dredging and anti-seepage repair
The pipelines in some old cities have not been effectively cleaned and maintained for a long time, which makes a lot of domestic residues and sludge accumulate inside the pipelines. When designing the pipeline reconstruction, the staff must pay attention to the handling of this part of debris. In addition to effective removal, they should also replace those thinner pipes with pipes with larger sections, which can increase the water flow capacity of the pipes to some extent. In addition, under the influence of many factors such as road vehicles, the joints of pipelines are prone to dislocation, looseness and water leakage. When repairing this kind of pipeline, concrete should be poured again at the joint between the tank bottom and the inner wall of the pipeline to effectively enhance the anti-seepage ability of the pipeline.
2.2, the choice of pipeline reconstruction construction scheme
When selecting the pipeline scheme, we should pay attention to the following issues. First of all, the old pipeline should be replaced in the original position, because the old city is not only densely built, but also has a narrow road surface and a large traffic volume. When replacing the pipeline, the design scheme and construction sideline should be reasonably selected; Secondly, replacing the blocked pipeline can effectively avoid the occurrence of large-scale excavation and effectively reduce the engineering quantity, and the old pipeline can still be used before laying a new pipeline; Third, reinforce and repair the pipeline. This method is mainly suitable for the pipeline between two wells, and there is no need to dig the road surface during operation. In general, lining or paint will be used.
2.3, drainage structure transformation
During the reconstruction of drainage structures, the following problems should be paid attention to: First, the specific location of inspection wells should be determined, and drainage pipes should be arranged in other pipelines. In order to better avoid the impact of vehicles or other factors, it is best to lay the pipeline on non-motor vehicle lanes or sidewalks, or fully combine the specific conditions of the region to lay the pipeline in the green isolation belt, which will provide greater convenience for future construction; Secondly, when selecting materials for pipelines, we should vigorously promote all kinds of modern new materials, which can not only better surface the future leakage phenomenon, but also better meet the actual transformation needs of urban municipal drainage pipelines. At present, PE pipes and high-density polyethylene plastic pipes are the most common. These materials are not only difficult to be corroded, but also have the advantages of low flow resistance and long service life.
3. Strengthen the maintenance and management of pipe network.
3. 1. The government deepens reform and enterprises change their ideas.
First, clarify the management relationship between enterprises and the government. The government has gradually changed from the previous management mode to modern market management, creating a good environment for the maintenance and management of municipal facilities. Effective management and macro-control of municipal work from legal, administrative and economic aspects; Second, constantly establish and improve relevant rules and regulations and normative documents; Third, constantly improve the personnel management system, scientifically and rationally divert personnel, and actively mobilize the enthusiasm of all employees to better serve the management and maintenance of municipal facilities.
3.2, establish a legal management system to meet the needs of the market economy.
The relevant administrative departments of municipal drainage pipelines should give full play to the mandatory, authoritative and normative nature of existing laws and regulations in actual management, actively carry out various management activities, fully coordinate the cooperation between surprise rectification and daily inspection, scientifically and reasonably combine comprehensive law enforcement with independent law enforcement, and conduct strict inspections and fixed-post inspections on road setting, post setting and personnel setting. At the same time, they should reasonably combine persuasion and education with leaving the country, constantly deepen and refine various management work, and truly achieve municipal drainage. In addition, strict supervision and management of municipal drainage pipeline facilities, including effective supervision of administrative management and facilities management of maintenance units.
3.3. Establish a scientific maintenance and construction team.
In the actual operation process, major maintenance enterprises must strictly follow the relevant regulations and requirements to maximize the effect of maintenance management. They can set up a sewer emergency repair team and a sewer maintenance and construction team, with experienced and responsible backbone personnel to effectively control various diseases of sewers and better report the smooth flow of municipal drainage pipelines in the city. In short, in the renovation design of municipal drainage pipe network, we should try our best to give priority to prevention in advance, and don't wait for problems to think about how to remedy them, so the quality of the design scheme directly affects the final effect of the whole renovation project. In the actual implementation process, we will encounter all kinds of unexpected problems, so when making the design scheme, we must fully consider every detail, save money as much as possible, listen to the opinions of the citizens, and carry out the most scientific and reasonable reconstruction design of the urban drainage pipeline to effectively ensure the reliability and rationality of the design.
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