Qitai River drainage pipe, cast iron drainage pipe, bridge drainage pipe, PVC drainage pipe, shipped nationwide

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　　Qitai River drainage pipe, cast iron drainage pipe, bridge drainage pipe, PVC drainage pipe, shipped nationwide

　　What are the reasons for damage or poor drainage of drainage holes in bridge engineering, and how can they be prevented? Reason analysis: ① The material selection of the drainage pipe is unreasonable and prone to damage. ② Insufficient number, aperture, and length of drainage pipes, insufficient or omitted installation, resulting in poor drainage on the bridge deck. ③ The distribution of drainage pipes is unreasonable, which affects the drainage effect. ④ The elevation of the drainage pipe is unreasonable, causing poor water flow or easy blockage at the inlet and outlet. ⑤ The waterproof treatment around the drainage pipe is not in place, and the bridge deck around the pipe mouth is leaking water.

　　① The selection of drainage pipes should consider durability and sturdiness, and it is advisable to use cast iron pipes as drainage pipes. ② Strictly follow the requirements of the shooting range to install the drainage pipe, and the aperture should meet the requirements, without omission, shortage or reduction of aperture. At the same time, it should be noted that the protruding part of the bridge deck has sufficient length and downward inclination angle to prevent water flow from scouring and corroding the beam. ③ Reasonably determine the location of drainage pipes based on the longitudinal and transverse slopes of the bridge deck. The low-lying sections of the bridge deck should be densely arranged, and drainage pipes should be installed at the bridge to prevent water accumulation in the low-lying areas of the bridge deck. ④ When laying horizontal drainage pipes, strict layout should be carried out to accurately control the elevation of the pipe mouth and prevent blockage and impact on the appearance of the bridge deck caused by water flow obstruction and water accumulation due to excessively high pipe mouth or excessively low pipe mouth. Strictly control the construction of the catchment area around the pipe opening, which should not be higher than the surrounding bridge deck. A gentle groove should be formed to ensure smooth collection of water flow around the pipe opening. ⑤ The construction of the waterproof layer at the bottom of the pipe requires strict control, the installation of the drainage pipe should be firm, the surrounding concrete should be dense, and it should be tightly combined with the drainage pipe without any voids or looseness.

　　The drawing of the bridge drainage pipe is a very important part of the production process of the bridge drainage pipe. Unless it is a conventional model specification, the customer can directly specify the size and the manufacturer can produce it directly, or they all have the supply. But for those bridge drainage pipes with special specifications and sizes, they must be strictly customized according to the drawings. So what are the necessary data on the bridge drainage pipe drawings? The height, inner diameter size of the horn mouth, inner diameter size of the small mouth, wall thickness, corner curvature, etc. should all be explained in detail.

　　The setting of rainwater holes and downspouts on the bridge deck should be as strict as on the roof, but they are easily overlooked in both design and construction. The common problems are mainly manifested in the following points: the water collection port is small and cannot discharge the water in a timely manner; The elevation of the water intake is higher than the surrounding height, causing water accumulation; The water inlet is higher than the surface of the cement concrete, and the surrounding concrete is not dense, causing water leakage around the pipe; The water outlet pipe is too short, resulting in urinary eaves phenomenon. This leads to damage to the concrete around the water intake and the outer side of the edge beam. With the rapid development of economy and technology and the changing demands of people, market competition has become more intense. With the development of the economy and the significant increase in transportation volume, there is an increasing demand for cast iron drainage pipes for bridges on highways, roads, and bridges. Common cast iron drainage pipes for bridges can be divided into two types: circular and rectangular, with vastly different specifications. Manufacturers will design, select, and customize according to the drawings, and the wall thickness, size, and weight will be produced in accordance with national standards

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