1. What is the construction sequence of the grooving project for the water supply pipeline laid by PEX Fittings Plastic underground?

Water supply pipelines are often laid underground, and the construction sequence of the water supply pipeline grooving project is: alignment construction and set-off-trench excavation, pipe stabilization, pipeline sockets, pressure test, pipeline disinfection, sterilization and cleaning, trench backfilling Wait.

  1. What is the purpose of the support point of the pipe trench and the key support point method?

The support points of the frame can reduce the amount of excavation and construction land occupation, and reduce relocation. The supporting point is composed of supporting plates, supporting bars and supporting columns. The supporting plate is close to the wall of the pipe trench, and the supporting column is fixed to the supporting plate. The supporting bar is built on the supporting column and then the force is transmitted to the supporting plate to stabilize the wall of the pipe trench.


  1. What are the ways of the cross section of the pipe trench? What are the elements of the method of selecting the cross section of the trench?

There are straight grooves, ladder grooves, mixed grooves and cooperative grooves for the cross section of the pipe trench. The cross section of the pipe trench is generally selected according to the type of soil, surface water conditions, on-site standards and construction methods, and in accordance with the basic requirements of the design plan. The cross-sectional specifications, length and buried depth of the pipeline are carried out. Appropriate selection of the excavation cross section of the pipe trench can create good conditions for the entire construction process afterwards, ensure the construction quality and safety of the project, and reduce the amount of foundation pit excavation.


  1. What are the basic solutions for PEX Ball Valve's pipeline? What are the available standards?

There are five types of foundation methods: ramification foundation cushion, rolling compaction, compaction and compaction, drainage pipe soil and grouting structure reinforcement. Branch base cushion: It is suitable for solving shallow weak farmland foundation, collapsible subgrade (only the panax notoginseng lime soil foundation cushion), swelling farmland foundation, and periodic frozen soil subgrade. Rolling compaction: generally used for gravel soil, cohesive soil with not too high moisture content and backfill soil subgrade. The dynamic compaction method should pay attention to the damage of its vibration to the surrounding buildings (within about 30m). Compaction and vibrating: suitable for solving gravel soil, sandy soil or part of clay soil with low particle content of clay drainage pipe soil: suitable for solving thick and thick saturated soft soil layers, but must have the load and time of top pressure, The thick peat soil layer should be treated with caution. Grouting structure reinforcement: suitable for solving gravel soil, cohesive soil, sand, collapsibility and other roadbeds, and it is very useful for solving roadbed safety accidents in completed engineering projects.