Quality requirements and development situation of plastic inspection well installation
Core tips: the quality requirements of the plastic inspection well are high, and the future situation is well developed with CPVC fiberglass composite power cable tube
Plastic inspection well is one of the common pipes in life, and its installation requires a combination of standards:
1. the installation quality of the wellbore needs to meet the following requirements:
The main control program, the general elevation of wellbore deviation allowed within the range of 10mm, detection methods can be found in every well center 1 points, then the level measurement; verticality deviation in wellbore at about 0.5 degrees, can be in the shaft 4 point level detection of walls.
The quality demand of 2. pit backfilling is as follows:
The main control program: pit density should be consistent with pipeline trench backfill density, each well 4, using steel free fall insertion method to detect;
General project: backfilling and tamping of the pit backfill according to the design of stratified symmetry, this point needs to be observed and verified in the field.
3. the quality inspection requirements for the installation of the shaft cover are as follows:
The main control program: elevation consistent protective cover seat covers and pavement, road rain water grate elevation of the allowable deviation is in the range of 0~10mm, with the level at 1 wells measurement center; no protective cover seat elevation error of 10mm, each well 1 point level detection.
General project: protective covers basic allowable thickness deviation is 10mm, with a ruler in measuring seat 4 points; the gap between the manhole cover with the well base is less than 5mm, in the cap seat symmetric 4 point measurement method; test road covers should be consistent with the slope, road, covers the center, in accordance with the road lined with Purdue CPVC FRP composite power cable pipe, and then measured; sewage inspection wells need to cover the need to cover, rubber sealing ring, which require a visual experience.
The excavation of 1. well is as if the quality requirements are as follows:
The main control program, no pit excavation. Even if the local natural foundation changes will also have remedial measures, the well bottom high allowable deviation of 10mm. It is usually measured at the wellbore center by a leveling instrument.
In general, the width of the bottom of the pit should not be less than the design requirements. Generally, 1 points on both sides of the pit are measured by a ruler. The slope of the well pit can not be steeper than the pipe side slope. The 1 points on each side of the well pit are measured by the slope scale.
2. the base quality of the inspection well should meet the following requirements:
The main control project, the general base elevation deviation allowable range is +15mm. It can be measured by a leveling instrument.
In general, the width of the width of the base is within +10mm. Each pit is marked 2 points and then measured with a ruler; the thickness of the base can tolerate a deviation of +10mm, which can be measured by a ruler at 1 points per pit.
3. the quality of the installation of the seat and pipe should meet the following requirements:
In the main control project, the height of the seat nozzle is allowed to have a +10mm deviation. Each level is detected at 1 points per level. The well seat is connected with the pipeline. Every interface rubber ring has no drop and no foreign bodies in the well. The inspection method is 1 points for each interface, and every interface is checked with reflector.
At present, it is known that the application field of the inspection well has been included in the following aspects:
Drainage well: mainly in the construction area and municipal road drainage pipe network, is also the most widely used area of Shanghai excellent well plastic inspection well.
Power well is often used in power cable communication network in urban and residential areas. At present, few plastic inspection wells are involved in this field.
Communication well: this kind of well is also often seen in the power cable network of urban district.
Gas well: the gas transmission pipe network in residential area can be seen, but there are special standards in this area, and the plastic inspection wells are also in contact with this field.
Valve well: the inspection well for the water supply pipe network in the urban district.
Fire wells: this kind of inspection well should be the most common and suitable for the development of plastic inspection wells.
From the above, we can see that the field of plastic inspection well is also in several aspects. So the future development prospect is very wide, which is lined with CPVC FRP composite power cable pipe.