FRP-reinforced plastic (FRP) Manhole a .FRP reinforced plastic (FRP) Manhole specifications structure: start well, through wells, 90 ° elbow wells, three wells, four wells. Round fiberglass manholes by: Wells room, wellbore, the well shut neck, concrete pressure washers, covers. II. Specifications Model:. Φ400.Φ500.Φ600.Φ700.Φ1000 three. Features: 1, using split-weather construction assembly structure. 2, FRP manhole ring stiffness more than 1.5 times higher than HDPE plastic manhole. 3. Well seat FRP manhole can be any openings in the form of connection with the adhesive manifold connections saving accessories. 4, FRP Manhole using polymer resin as raw material, high strength, acid corrosion, life and architecture synchronization. 5. Shaft FRP manhole pipe connection with A and B tube socket connection (gap for tight fit), in the construction process, if the vehicle rolling onto the wellbore wellbore will naturally sink, will not cause damage. Four. FRP manhole construction process: FRP fiberglass plastic manholes construction requirements and considerations pits and manholes construction foundation pit excavation and pipe should also ditch excavation wells seat main line should be in the same pipeline trench axis . Pit slope consistent with the trench slope. When the excavation pit, not disturbed soil over the base dug; manholes should fill under the foundation approach based on local geological survey data and back calculated to determine the drag force, when no information can be implemented in accordance with the following provisions: 1. sand, rock gravel pit soil soil wells, laying 100mm coarse sand cushion; 2. soft soil soil pit wells, laying of 150mm thick gravel or gravel (diameter 5-40mm) road muck, after consolidating in the upper 50mm in shop sand cushion; 3. wet wells pit filling loess soil, and after the original soil compaction, dust laying 100-150mm cushion Panax, Panax dust compacted after laying 100mm coarse sand cushion. Shen mud pit room rain check wells should be chosen according to the specifications of the local excavation of silt chamber depth. Pit excavation should be chosen according to the specifications, consider well the main line holder bias factor, Pit-side bias should be flush with the pipe trench. High water table areas or construction during the rainy season, there should be drainage, lowering the water level of the measure. At high water table during the rainy season or in the pipeline (including manholes) installed (but not yet the irrigation test), should be taken to prevent the well body floating technical measures. Check the seat wells and piping installation sequence should start upstream section of pipe connected to the user to start the installation, with the well pipe → → → tube wells installed in the order, and gradually to the downstream branch pipe, dry pipe extension. Backfill backfill should drain line (including pipes and manholes) carried out after acceptance, and at the same time with the pipe trench backfill. Before backfilling sand bags available, drill rod, wooden base supporting the wells, bore fixed, and should be excluded in the excavation trench water. Backfill material: from the surface to the bottom of the tube base pipe trench backfill material within 0.5m above the top range of available gravel dust, gravel particle size of less than 40mm high (middle) calcium fly ash, coarse sand or trench excavation out good quality soil. Backfill shall not be used mud, garbage and permafrost, etc., but not entrained stones, bricks and other objects with water chestnut lumps. In the largest local permafrost depth greater than or equal 1.0m frozen layer is within the range of not less than 100mm sand fill in around the wellbore. Backfill should be symmetrical layered artificial backfill, which is consistent with the density of the pipe backfill, and shall make the wellbore displacement and tilt, non mechanical backfill. Staffing every three pairs, each day under normal circumstances can be installed about 20 manholes. Maintenance and repair pipes clear through the use of professional cleaning machinery should be implemented through clear water. Rain checks wells silt, sand cleaning, mechanical suction tools should be used to implement cleanup. Such as the use of artificial cleaning, should be dedicated Qingtao tools. Check the pipeline silt, the mirror should be visually checked, not go down detection. Note: For more details of the company will send professional and technical personnel on-site installation guide.