Four-hole grid tube stock, the full four-hole grid PVC pipe

Four-hole grid tube four-hole grid tube, four-hole pipe, perforated square tube is a new type of solid wall port side of the porous structure of a combination of plastic pipe. Four square hole of the same size composition. Symbol "SS" stands for "grid tube four-hole grid tube, four-hole pipe, perforated square tubes have SVSY48 * 4, SVSY42 * 4, SVSY33 * 4, SVSY28 * 4 four specifications. Construction may, in accordance within the aperture Select the size of the different place different diameter optical, electrical and cable - Four grid tube, section chief position should manhole four-hole square tubes, perforated square pipe length and bending 1. Communication plastic pipe may be. In the a straight route, the segment length should not exceed 200m, on the highway, the section length of not more than 300m, and the length of each segment should be equal. 2. The laying of each pipeline should be straight when the road curved or in case of need Raoyue When other pipes, pipe bending section straight pipe length should be less than the maximum allowable segment length. curved bend radius 3. bend the pipe shall not be less than 10m, center of the pipe bend angle should be as large as possible. with a length of tubing should not have anti- bending (ie "S" shaped curve), or the central angle of the bent portion of bent pipes less than 90 ° (ie "U" shaped bend) - Four grid tube, four-hole square tube, square tube of porous base should according to the following provisions: 1. In areas with good soil, dug trenches after the ditch should be compacted sand or fine soil backfill 50mm 2. In soil less fortunate areas, should be done after the concrete foundation dug trenches. , based on the first 50mm sand or fine soil backfill. 3. In the soil is rocky areas, should backfill sand or fine soil after 200mm dug trenches. 4. In soil as backfill or soil unstable regions, should make concrete foundation steel plate. 5. After the poor soil, high water table, flow of sand or silt areas, should be carried out trenches dug foundation reinforcement, concrete pipes and encapsulated 1. pipe into the building or human (hand) hole when close to buildings or people (hand) hole should be not less than 2m length of reinforced concrete foundation and encapsulation. After four-hole grid tube, four-hole pipe, square pipe laying perforated completion should Several Issues Note: 1. In the general area, 300mm above the plastic tube group should be added at the heart of caution tape 2. In particular, 300mm at the top of the plastic tube group should be added to the concrete slab or general protection 3. Brick in the plastic pipe. should be within the range of around 20cm sift fine soil compaction, soil compaction house divided than 20cm available. prohibited the use of stones, sediment or other backfill materials. 4. In the course of laying the pipeline should enter a manhole spout tight seal block 5. When the plastic pipe without burial, aging and protective measures should be taken against mechanical damage.