Power pipeline installation pipe pillow sequence~

In the laying construction of power pipelines, the correct installation of pipe pillows is one of the key links to ensure the safe and stable operation of pipelines. Pipe pillows can not only effectively support the weight of pipelines and prevent excessive deformation of pipelines due to their own weight or external loads, but also ensure the straightness of the pipeline axis and reduce the stress at the interface. Below, we will introduce the correct installation sequence of pipe pillows in power pipeline installation and related precautions in detail, especially taking the selected AD pipelines and their supporting pipe pillows as an example to illustrate.

First of all, the preparation work before construction is essential. Construction personnel need to carefully check whether the AD pipeline pipe pillows to be installed are intact, whether there are cracks, breakages and other defects, and ensure that their specifications and models match the design requirements and the supporting AD power pipelines. At the same time, clean up the debris, stones, etc. on the pipeline laying path, and level the bottom of the trench. If there are requirements in the design, the base needs to be tamped or laid with corresponding cushions to provide a solid and flat foundation for the installation of the pipe pillow.

Next is the laying of the pipeline and the initial positioning of the pipe pillow. Gently put the AD power pipeline into the trench according to the design laying direction and slope. Pay attention to avoid the collision between the pipeline and the trench wall or the hard object at the bottom of the trench, resulting in pipeline damage. Then, according to the spacing of the pipe pillows specified in the design drawings, the installation position of the pipe pillows is roughly determined at the bottom of the pipeline. Usually, the spacing of the pipe pillows will be determined comprehensively according to factors such as pipeline diameter, pipe characteristics and engineering geological conditions to ensure the uniform stress of the pipeline.

The pipe pillow is then installed. The pipe pillow is placed under the pipe in sequence according to the determined position. For the integral pipe pillow, it is directly sleeved on the pipe and ensure that it is perpendicular to the pipe axis; for the separate pipe pillow, the lower part of the pipe pillow needs to be placed accurately in the predetermined position, and then the pipe is carefully placed in the groove of the pipe pillow, and then the upper part of the pipe pillow is covered and preliminarily fixed. During the installation process, it is necessary to ensure that each pipe pillow is in the correct position and fits tightly with the pipe, and there must be no hanging or loosening.

After the installation is completed, the pipe pillow needs to be carefully adjusted and fixed. Check whether the axis of the pipe pillow is consistent with the pipe axis, and whether the spacing between the pipe pillows is uniform in line with the design requirements. If the deviation is found, it should be adjusted in time. For the pipe pillow that needs to be fixed, the design prescribed methods can be adopted, such as the use of bolted connections, concrete pouring and fixing, etc., to ensure that the pipe pillow will not be displaced during the subsequent backfill soil and pipeline operation. Special emphasis is placed on ensuring that the outer wall of the pipe and the inner wall of the pipe pillow are in full contact when adjusting the cooperation between the AD power pipeline and the pipe pillow, so as to achieve the best support effect.

Finally, the overall inspection and backfill preparation are carried out. Comprehensive inspection of the installation quality of all pipe pillows, including location, spacing, fixing, and flatness of the pipeline, etc. After confirming that it is correct, the groove backfill operation can be carried out. The backfill should be layered and tamped to avoid impact on the installed pipe pillow and pipeline.

In short, the installation of power pipeline pipe pillows in strict accordance with the standard order is the basis for ensuring the long-term safe and stable operation of the power pipeline system in AD. Construction personnel should fully understand and master the main points of each step to ensure the quality of the project. Through the above steps, the installation of pipe pillows in AD power pipelines can be completed in an orderly, efficient and high-quality manner, laying a solid foundation for the safe operation of the entire power pipeline network. In actual operation, it is necessary to combine the specific engineering requirements and product instructions to ensure that every link is accurate. Choosing high-quality products like AD pipelines and strictly following the specifications for construction is the key to ensuring the safe, stable and long-term operation of the power pipeline system.