Introduction of Metal Corrugated Culvert

1 Overview

The company is the world’s best large galvanized corrugated pipe for sale supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.

Metal corrugated pipe is a typical space structure, with good ductility, high tensile, compressive, shear strength and other characteristics, and the structure of the member has a small cross section, light weight, and fast construction speed. Flexible and high The strong metal bellows culvert not only has the ability to adapt to the deformation of the foundation and foundation, but also can solve the problem of culvert damage caused by the uneven settlement of the foundation, and the metal bellows culvert has excellent stress characteristics due to the existence of axial corrugation , The axial and radial distribution of stress and strain caused by the load at the same time can spread the stress concentration of the load to a greater extent. And the cost is low, the design is simple, the construction period is short, the maintenance cost after construction is reduced, and the use of less material is beneficial to environmental protection. Especially in the areas of unfavorable engineering rock land such as permafrost, soft soil, expansive soil, collapsible loess, etc., the use of metal bellows structure to build culverts has advantages, so it has broad application prospects.

2 Use of metal bellows culverts at home and abroad

Metal corrugated culvert was first born in the United Kingdom (1784). In 1896, the United States took the lead in the feasibility study of corrugated plate channels and culverts, and it was first applied to culverts. The first corrugated culvert was applied to Scotland in 1913. I loved farmland irrigation in the neighborhood of Fort. In 1931, Australia first built an 8m car passageway. In 1990, the "Japanese Highway Design Code" formulated the technical specifications for bellows design. With the installation and use of bellows around the world, this structure has been proven. The versatility of the object in various use cases, and its life has exceeded the design life. When the Qinghai-Tibet Highway was built in the 1950s in the non-frozen spring section, the corrugated pipe culvert was used in emergency repair projects. It was discovered when it was excavated in the 1970s. The use condition is good. The section of Qingkang Highway (National Highway 214) Jiang (Luling) Qing (Shuihe) section is 291km in length and is located in the eastern part of the Qinghai-Tibet Plateau. , The average altitude is 4300m, the highest point of the route is 4824m above sea level, the annual average temperature is minus 4.2 C, the extreme minimum temperature is minus 48.0 C, and the annual freezing period is more than 180 days. The culvert was destroyed prematurely. Qinghai Province tried the φ3750px (inner diameter) steel galvanized corrugated pipe in the Jiangqing section of the G214 line implemented in 2000. It was successfully promoted to West (Ning) for a long time in 2001 and 2002. (Governance) Highway (Wu) Jiu (Governance) Section, Hua (Shixia) Da (Japan) Highway, Er (referring to Hara Mountain) Ga (Sea) Highway and other constructions Pipe culvert 8231.19m / 418 channels, diameter from 3750px to 1250px, fill height of culvert top increased from 2500px to 42500px, bellows wall thickness increased from 3mm to 5mm. In 200 years, the first survey and design institute of the railway organization Beijing Jiaotong University, China Pay first. The Highway Survey, Design and Research Institute conducted indoor and outdoor tests and theoretical studies on the four bellows test culverts built on the Qinghai-Tibet Railway. The results show that the design and construction requirements of the railway culverts are met, which provides a reliable theory for the application of bellows culverts to railway engineering basis.

3. Metal corrugated culvert advantages and scope of application

(1) Due to the standardized design and production of metal bellows culverts, the design is simple, the production cycle is short, and the construction period is short. On-site installation does not require the use of large equipment, which is mainly assembled construction (generally, the construction time of a culvert is within one working day). The exposed time of permafrost is shorter, and the amount of freeze-thaw is small, so it is especially suitable for permafrost areas.

(2) The metal bellows culvert is a flexible structure. The bellows has the excellent characteristics of lateral compensation displacement in the structure, which can give full play to the characteristics of strong tensile strength and superior deformation performance of the steel, and has greater resistance to deformation and settlement Capacity, especially suitable for soft soil, expansive soil, collapsible loess and other areas with low foundation bearing capacity and earthquake-prone areas.

(3) The construction of metal corrugated pipe culverts only needs to deal with the foundation and the import and export, reducing the amount of cement, block stone, flake or crushed stone, sand, etc., causing little damage to the environment, suitable for areas with fragile ecological environment Conducive to environmental protection.

(4) The construction of metal bellows culverts requires very little labor, so it is suitable for areas where labor is scarce.

(5) Metal corrugated pipe instead of reinforced concrete for culvert construction is helpful to solve the problem of damage to the concrete structure of the pipe and culvert in winter in the northern cold regions, and is suitable for plateau areas.

(6) Due to the use of standardized design and production, the design is simple, the production is not affected by the environment, the centralized factory production is carried out, and the production cycle is short, so it is suitable for engineering projects with high quality requirements and tight schedules.

 

Metal Corrugated Culvert

Type of metal building material

A corrugated iron church (or tin tabernacle) in Kilburn, London Typical corrugated galvanised iron appearance, with visible large flake type patterns. The galvanised sheet is viewed from below and is supported by a piece of angle iron (painted white).

Corrugated galvanised iron (CGI) or steel, colloquially corrugated iron (near universal), wriggly tin (taken from UK military slang), pailing (in Caribbean English), corrugated sheet metal (in North America), zinc (in Cyprus and Nigeria) or custom orb / corro sheet (Australia) is a building material composed of sheets of hot-dip galvanised mild steel, cold-rolled to produce a linear ridged pattern in them. Although it is still popularly called "iron" in the UK, the material used is actually steel (which is iron alloyed with carbon for strength, commonly 0.3% carbon), and only the surviving vintage sheets may actually be made up of 100% iron. The corrugations increase the bending strength of the sheet in the direction perpendicular to the corrugations, but not parallel to them, because the steel must be stretched to bend perpendicular to the corrugations. Normally each sheet is manufactured longer in its strong direction.

CGI is lightweight and easily transported. It was and still is widely used especially in rural and military buildings such as sheds and water tanks. Its unique properties were used in the development of countries such as Australia from the 1840s, and it is still helping developing countries today.

History

[

edit

]

Early manual corrugated iron roller. On display at Kapunda museum, South Australia Contemporary use of corrugated galvanised iron in architecture (Australia)

Henry Robinson Palmer, architect and engineer to the London Dock Company, was granted a patent in 1829 for "indented or corrugated metallic sheets".[1] It was originally made from wrought iron produced by puddling. It proved to be light, strong, corrosion-resistant, and easily transported, and particularly lent itself to prefabricated structures and improvisation by semi-skilled workers. It soon became a common construction material in rural areas in the United States, Argentina, Spain, New Zealand and Australia and later India, and in Australia and Argentina also became (and remains) a common roofing material even in urban areas. In Australia and New Zealand particularly it has become part of the cultural identity,[2][3][4] and fashionable architectural use has become common.[5] CGI is also widely used as building material in African slums and informal settlements.

For roofing purposes, the sheets are laid somewhat like tiles, with a lateral overlap of one and half corrugations, and a vertical overlap of about 150 millimetres (5.9 in), to provide for waterproofing. CGI is also a common construction material for industrial buildings throughout the world.

Wrought iron CGI was gradually replaced by mild steel from around the 1890s, and iron CGI is no longer obtainable, but the common name has not been changed. Galvanised sheets with simple corrugations are also being gradually displaced by 55% Al-Zn coated steel[6] or coil-painted sheets with complex profiles. CGI remains common.

Corrugation today

[

Want more information on large steel culverts prices? Feel free to contact us.

edit

]

Today the corrugation process is carried out using the process of roll forming. This modern process is highly automated to achieve high productivity and low costs associated with labour. In the corrugation process sheet metal is pulled off huge rolls and through rolling dies that form the corrugation. After the sheet metal passes through the rollers it is automatically sheared off at a desired length. The traditional shape of corrugated material is the round wavy style, but different dies form a variety of shapes and sizes. Industrial buildings are often built with and covered by trapezoidal sheet metal.[7]

Many materials today undergo the corrugation process. The most common materials for corrugated iron are ferrous alloys (e.g. stainless steels), aluminium and copper. Regular ferrous alloys are the most common due to price and availability. Common sizes of corrugated material can range from a very thin 30 gauge (0.012 inches, 0.3 mm) to a relatively thick 6 gauge (0.1943 inches, 5 mm). Thicker or thinner gauges may also be produced.

Other materials such as thermoplastic and fiberglass-reinforced plastic sheets are also produced with corrugations. Clear or translucent products can allow light to penetrate below.

Pitch and depth

[

edit

]

Citroën HY van with body made of iron sheet. A stack of new iron sheets

The corrugations are described in terms of pitch (the distance between two crests) and depth (the height from the top of a crest to the bottom of a trough). It is important for the pitch and depth to be quite uniform, in order for the sheets to be easily stackable for transport, and to overlap neatly when joining two sheets. Pitches have ranged from 25 mm (1 inch) to 125 mm (5 inches).

It was once common for CGI used for vertical walls to have a shorter pitch and depth than roofing CGI. This shorter pitched material was sometimes called "rippled" instead of "corrugated". However nowadays, nearly all CGI produced has the same pitch of 3 inches (76 mm).

A design of corrugated galvanised steel sheets "Proster 21", used as formwork, has 21 millimetre deep V-shaped pits.

Corrugated galvanised iron roof.

Corrosion

[

edit

]

Rusted corrugated steel roof

Although galvanising inhibits the corrosion of steel, rusting is inevitable, especially in marine areas–where the salt water encourages rust–and areas where the local rainfall is acidic. Corroded corrugated steel roofs can nevertheless last for many years, particularly if the sheets are protected by a layer of paint.

See also

[

edit

]

References

[

edit

]

For more information, please visit metal corrugated culverts.