C.
If any problem is found in the inspection of materials with factory certificate, it shall be handled by the supplier after quality and technical appraisal; Materials with unqualified quality or without factory certificate are prohibited from being used in the project.
For jointly built or jointly built PVC pipeline groups in special sections, the top layer of the pipe hole at the top layer of the pipeline group is less than 0.15m from the ground and cannot be protected by steel pipe shall be wrapped.
when the above buried depth requirements cannot be met in special sections, when plastic pipes are used for laying, if the distance from the pipe top to the ground is greater than 0.3m, concrete cement (C15) shall be used The sealing thickness is 15 ~ 20cm.
After excavation, carefully check whether there are bricks, stones and other hard substances, other sundries and sludge at the bottom of the pipe trench and pit.
the specifications, procedures and quality of all equipment used in communication pipeline engineering shall meet the requirements of design documents and technical specifications, and the construction unit, together with the construction unit or the supervision unit, shall organize mobilization inspection before use.
the top surface in the manhole) The clear distance between pipes shall not be less than 0.3m.
D.
General provisions a.
On site inspection of plastic pipes and mobilization inspection record of PVC pipes III.
After entering the site, the storage, storage, fire protection and safety of communication plastic pipeline equipment shall meet the requirements of relevant standards; Collection and spot check: timely collect quality certificates such as equipment product certificate, production license and quality inspection report; Sampling inspection shall be carried out on the materials of the pipeline: the quantity is as follows (first, sampling inspection shall be carried out according to the requirements of the material bidding document of the construction unit, and the following table shall be implemented if there are no special provisions): equipment inspection standard 2.
Width requirements: the nozzle hole shall be arranged according to the requirements of excavation.
If the construction site conditions permit, the soil layer is solid, the groundwater level is lower than the trench bottom, and the excavation depth exceeds 3M, it shall be used Construction by grading method.
2.
B.
The buried depth of the pipeline shall be excavated according to the design requirements.
Any problem or unqualified equipment shall be handled in time; b.
access person (hand) The bottom of the pipe at the hole is away from the bottom plate surface of the manhole (hand) and the top of the pipe.
pipeline construction – earthwork excavation standard 1.
In case of special circumstances, the on-site visa shall prevail.
1、 Safety disclosure before pipeline construction safety disclosure form for pipeline construction (sample form) site safety inspection safety of roadside construction 2、 Equipment inspection 1.
A.
Whether the trench is flat, whether the foundation is flat and solid, and whether the width of the bottom pipe trench meets the requirements: width = sum of pipe outer diameter + pipe spacing + reserved space on both sides of the pipe.
Double Head Lifting Pin Anchor
It is away from the top surface in the manhole (i.e.
There shall be no upward bending pipe holes: no damage, blockage, sludge and sundries..
Excavation of pipeline trench: setting out and positioning shall be carried out before excavation of pipeline trench, and the slope shall meet the requirements “Zigzag” or “U” Font.
Inspection records shall be made for inspected equipment; c.
If the distance from the top of the pipeline to the ground is less than 0.3m, seamless galvanized steel pipe must be used for protection.
the pipe slope shall have a certain slope, which can be 3 ‰ ~ 4 ‰, and shall not be less than 2.5 ‰.
cement concrete with a sealing thickness of more than 30cm.
E.
