Technical Discussion and Practice of continuous pipeline construction with opening holes ** : In modern urban construction and infrastructure maintenance, the role of pipeline system is becoming more and more important. Whether it is water supply, drainage, gas supply or other types of pipelines, ensuring their reliability and continuity is the key to ensuring the normal operation of the city. However, in many cases, the maintenance and renovation of the pipeline have to be carried out in the state of continuous flow, which puts forward the technical challenge of the construction of continuous flow of the pipeline. This paper will discuss the relevant technology, construction method and practical application in this field.

First, the necessity of continuous pipeline construction

The operation of the pipeline system is usually continuous, especially in the fields of water supply and gas supply, and the service of the user is not interrupted. Therefore, when it is necessary to open pipe holes, install valves, connect new pipes and other operations, it is necessary to adopt the method of non-stop construction. This can minimize the impact on users, avoid service interruption caused by construction, and ensure the normal operation of urban life.

2. Technical requirements and challenges

The construction of continuous pipeline drilling involves a number of technical requirements, including but not limited to:

1. ** Stability **: When carrying out non-stop construction, it is necessary to ensure the operator. Especially in the construction of high pressure pipeline and flammable and explosive gas pipeline, risk management is particularly important.

2. ** Sealing **: The sealing of the pipeline must be maintained after opening the hole to prevent the leakage of the medium and ensure the stability of the construction site and the surrounding environment.

3. ** Operation efficiency **: Due to the limitation of construction time, construction personnel need to complete the operation in a short time, which requires the efficiency of construction methods and tools.

4. ** Technical proficiency **: Construction personnel need to undergo strict training and master relevant technologies to cope with various emergencies.

In the face of these technical challenges, the construction unit needs to develop a detailed construction plan, and carry out site investigation and evaluation to ensure the smooth progress of construction.

Iii. Construction method

There are a variety of methods for continuous pipeline construction, and the following are several common construction techniques:

#### 1. Hot melt connection

Hot melt connection is a common plastic pipe connection method. The hot melt machine is used to heat the connection part of the pipeline so that the surface is melted, and then the connection is quickly connected to form a firm connection after cooling. This method is suitable for small caliber plastic pipes, but in the case of continuous transmission, special attention needs to be paid to the control of heat sources, so as not to affect the normal operation of the pipeline.

#### 2. Mechanical cutting method

Mechanical cutting method is an effective solution for the opening construction of metal pipes. Through the cutting equipment, precise cutting is performed under continuous transmission, while the temporary sealing device is used to prevent media leakage. This method requires a high skill level of the construction personnel to ensure stability and accuracy during the cutting process.

#### 3. Cold cooking

The cold method is mainly suitable for the opening of small diameter pipes. The tool is used to drill holes on the outside of the pipe, using a cold method to avoid heat affected areas and prevent the deformation of the pipe. The advantages of this method are simple operation and short construction time, which is suitable for emergency maintenance and small scale transformation.

#### 4. Prefabricated joint method

The prefabricated joint method is an effective method in the construction of continuous flow. The construction unit can complete the prefabrication of the pipe in the factory in advance, and then install it on site. This method improves the construction efficiency and reduces the complexity of site construction.

Iv. Case study

In the renovation project of water supply pipeline in a city, due to the old and serious leakage phenomenon of the urban water supply network, it was decided to renew part of the pipeline. However, considering the water needs of urban residents, the project team decided to adopt the method of continuous construction.

The project team conducted a detailed site survey before construction, evaluated the material, pressure, flow and other parameters of the pipeline, and formulated a detailed construction plan. In the construction process, the mechanical cutting method is used to open the pipeline, and the flow is controlled by temporary valves to ensure the stability of water supply during construction.

Through reasonable scheduling and efficient construction, the project team completed the opening and connection of the pipeline within the specified time, which greatly reduced the impact on the daily water consumption of residents. The successful implementation of the project provides valuable experience for subsequent pipeline renovation.

5. Precautions in construction

In the construction of pipeline perforation and continuous transmission, the following points are particularly important:

1. ** Prior evaluation **: Before construction, it is necessary to conduct a comprehensive evaluation of the material, pressure, flow, etc., of the pipeline to provide data support for construction.

2. ** Risk management **: During the construction process, it is necessary to monitor the pressure and flow of the pipeline in real time to ensure that anomalies can be handled in time.

3. ** Personnel training **: Construction personnel must be fully trained, master the relevant operational skills and emergency handling ability, in order to deal with the unexpected situation that may occur in the construction process.

4. ** Construction records **: Detailed records should be made during the construction process, including construction time, methods, personnel, equipment, etc., in order to facilitate subsequent inspection and rectification.

### Conclusion

Pipeline construction is a complex and technically demanding job, which involves many aspects of knowledge and skills. In the construction and maintenance of urban infrastructure, the effective use of this construction method can improve work efficiency, but also can greatly reduce the impact on users. Through continuous technological innovation and practical experience accumulation, the future pipeline construction will be more stable and efficient, and provide a more solid foundation for the development of the city.