河北衡水枣强玻璃钢工业园 Address: Zaoqiang FRP Industrial Park, Hengshui , Hebei
13931811637 Mobile: 13931811637
李经理 Contact: Manager Li
firstname.lastname@example.org Email: email@example.com
FRP pipe laying
First, the bottom of the ditch of the glass fiber reinforced plastic pipe is uneven, and there are sharp hard objects such as hard soil blocks and stones that obstruct the pipeline.
Generally speaking, pipe trenches in low-lying areas are mechanically excavated. Due to the low terrain, the bottom of the pipe trench is wet or watered, and there is a high possibility of hard objects, mainly hard objects such as gravel, bricks, and obstacle pipelines. In particular, there is a large amount of water on the pipe trench. When these hard objects exist below the water surface, it is not easy to find. After the glass fiber reinforced plastic pipe is directly backfilled after the installation on the water surface, the glass fiber reinforced plastic pipe is directly pressed on the hard object. Maybe it will not be damaged due to the looseness of the backfill soil in a short time. The internal pressure of the pipe and the internal liquid flow cause micro-vibration of the pipeline. With the increase of time, the point load caused by the hard object on the glass fiber reinforced plastic pipe becomes larger and larger, and the point where the glass fiber reinforced plastic is affected by the hard object will be damaged. In addition, the unevenness of the bottom of the trench will cause uneven force on the pipeline. When backfilling, stress concentration will occur in the raised place. Damage to pipes or cause unnecessary wear. This wear is more severe when there is pulsating pressure in the piping system.
Second, a lot of water in the trench and collapse of the trench.
Ground engineering construction usually catches up with the rainy season. Due to the low-lying terrain of the construction site, there is a large amount of water in the trench after excavation, and the deepest site can reach more than 1.0m. Due to the light weight of the high-pressure glass steel pipe, after the pipeline is installed in the trench, it all floats on the water. Due to the buoyancy of water, it is difficult to press the glass fiber reinforced plastic pipe into the bottom of the ditch with soil during backfilling, which causes the buried depth of the pipe to fail to meet the design requirements. In addition, because there is too much water in the ditch, it is difficult to grasp the flatness of the ditch bottom, nor can it be seen whether there are obstacles such as pipelines and gravel at the bottom of the ditch, and it is difficult to ensure the construction quality of FRP pipes. Water accumulation in the pipe trench in low-lying areas can easily lead to the collapse of the pipe trench, and the massive earthwork that collapses will often directly hit the glass fiber reinforced plastic pipe line and smash the pipeline.
Third, the impact of hard objects such as stones and mechanical backfill in the trench backfill.
The backfill soil in low-lying areas is relatively wet, and even some of them are basically in the state of mud. During the backfill process, if the mud is mixed with hard objects such as stones, it is difficult to find. These stones are buried in the bottom of the ditch and directly connected to the glass fiber reinforced plastic pipe. Contact will cause great harm to FRP pipes. It is also possible that during the backfilling process, the glass steel pipe line was directly damaged by the impact of gravity due to the large stones. During mechanical backfilling, the soil from the full bucket is backfilled directly into the trench from a high place, and the pipeline will be damaged due to the large impact force.
Fourth, other factors, such as irregular operation of construction personnel.
During construction, due to the harsh construction environment in the low-lying area, the construction personnel did not operate in accordance with the specifications. For example, when the pipeline is connected, the muddy water in the threaded section is not wiped clean, the screwing depth is not sufficient, and water, mud and other debris in the pipeline. In addition, construction personnel throw tools at will, which is particularly prone to smashing FRP pipes. These details are hidden dangers in the construction of high-pressure fiberglass pipes.