Key points of metal corrugated culvert structure design

Metal corrugated culvert, also known as corrugated culvert, refers to the threaded corrugated pipe used to lay the culvert under the highway and railway, which is made of corrugated metal sheet coil or corrugated steel plate. It is widely used in highway and railway culverts, passages, bridges, tunnels, temporary sidewalks, drainage pipelines and various mine roadway retaining wall support projects.

The metal bellows culvert adopts standardized design and centralized production, and the on-site installation of civil engineering and profiles can be implemented separately, reducing or completely abandoning conventional building materials, with a short construction period and far-reaching environmental significance. The structural stress of the metal corrugated pipe culvert is reasonable, the load distribution is uniform, and it has a certain anti-deformation ability, which can solve the problem of damage to the concrete structure of the bridge and the pipe culvert in the cold area (frost) in the north. Make the road surface without expansion joints, improve driving comfort; It is conducive to improving the "dislocation" phenomenon at the junction of soft soil foundation structure and embankment, and improving driving safety. The post-construction operation and maintenance cost of the corrugated pipe culvert is low, and the actual cost of the project is lower than that of bridges and culverts with similar spans.

With its unique advantages and strong adaptability, metal bellows culvert replaces traditional products, and the application prospect is very impressive.

Material Specifications: Refers to the inner diameter d or span s, the unit is mm.

Waveform Code: Refers to the processed waveform specification, the code is A F.

Product Code: Circumferential Corrugated Steel Round Pipe Code ACSP; Corrugated steel plate code CSPS.

Example 1: A circumferential corrugated steel round pipe with an inner diameter of 2000mm and a corrugated form code of D, denoted as: ACSP D2000.

Example 2: A corrugated steel plate with a span diameter of 60,000 mm and a corrugated steel plate with the wave code E is represented as: CSPS E6000.

**DetailsMaterial: Q235A: Origin: Domestic.

Nominal outer diameter DN1000 DN8000(mm).

Wall thickness 3 8 (mm) length 1000 (m).

Executive standard JT T710-2008 Thermal conductivity -(W (

Linear expansion coefficient -(1 k) Longitudinal retraction rate -(

Inner diameter 1000 8000 (mm).

If you still need to know more about recommending two companies, Lin Jia, Leyuan Beijia Eiffel**may be 0318-5820626 You can also search directly**.

Hebei Weiye corrugated pipe manufacturing **** Baishun brand steel corrugated pipe culvert is a culvert form formed by using corrugated pipe or corrugated plate through connection and assembly. Bellows are made of materials such as steel, aluminum, or plastic. It is used to replace high-quality highway building materials for round pipe culverts, cover culverts, arch culverts and small bridges.

For highway culverts, the uneven settlement of culverts is one of the main types of failure. The steel corrugated culvert pipe has round, oval, semicircular, etc., and the inlet and outlet can also be made into an oblique mouth according to the proportion of the slope, and the diameter range of the processing corrugated pipe is 3mm 7mm, and the thickness of the pipe wall is 3mm 7mm, which can meet the needs of the thick fill. Steel bellows culvert has the characteristics of short construction period, light weight, easy installation, good durability, low engineering cost, strong deformation resistance, and reduced maintenance cost after opening to traffic, from the analysis of the essential relationship between material and structure and function, the use of flexible, high-strength steel bellows culvert, not only has the ability to adapt to the deformation of the foundation and the foundation, can solve the culvert damage problem caused by the uneven settlement of the foundation, and the steel bellows culvert has excellent stress characteristics due to the existence of axial corrugations. The axial and radial distribution of the stress and strain caused by the load at the same time can disperse the stress concentration of the load to a greater extent and give better play to the advantages of the steel structure.

Especially in the alpine permafrost, soft soil, expansive soil, collapsible loess and other areas, it has obvious economic benefits.

What is the specific content of the key points of steel bellows culvert design, the following Zhongda Consulting will answer for you.

1. Structural Analysis:

1) This diagram assumes that both the bellows and the soil are elastomers.

2) Regardless of the friction between the soil column at the top of the culvert and the surrounding fill, the angle distribution method is used to calculate, and the semi-infinite elastomer theory is calculated.

3) Soil weight: According to the theory of soil column weight, the internal friction angle = 30°, and the soil capacity is 18kn m.

Second, the structure of the treatment:

1) The corrugated is a circular integral pipe, which is assembled by the whole pipe section and connected by flange bolts.

2) After the steel corrugated plate culvert pipe is processed, it must be treated with hot-dip galvanizing and other anti-corrosion treatments. If it is processed with galvanized steel sheet, it must be processed for a second time after processing.

3) The integral pipe connection flange is made of angle steel and steel plate, and the corrugated plate welding is made of butt welding joint. The fasteners adopt the standard fasteners in the national standard, and their strength and specifications should meet the mechanical requirements, and not lower than the pipe strength requirements. The gasket is matched with the fastener.

The bolts and nuts are hot-dip galvanized.

4) The pipe wall and supporting accessories are hot-dip galvanized, and the average thickness of the galvanized layer is more than 84um. After the culvert is transported to the construction site, the construction site is painted with asphalt on both sides.

5) The sealing material is a rubber sealing ring with good durability or a square asbestos packing sealing strip.

Answers]: b, c, e

2021 textbook p278

This question examines culvert engineering. The engineering cost of the steel corrugated pipe culvert is lower than that of the bridge culvert of the same span, and the construction period is short.

Steel corrugated pipe culvert refers to the threaded bellows pipe for culverts buried in highways and railways, which is made of corrugated metal sheet coils or made of semi-circular corrugated steel sheets, which is widely used in culverts (pipes) in highways, railways, bridges, passages, retaining walls and various mines, roadway retaining wall support and other projects.

The main advantages of steel bellows culvert:

1) It has a strong ability to adapt to the deformation of the foundation, and has low requirements for the bearing capacity and flatness of the foundation, and the actual cost of the project is lower than that of bridges and culverts with similar spans.

2) The construction period is short, mainly for assembly construction. Standardized design and production are adopted, with simple design and short production cycle. The production is not affected by the environment, and centralized factory production can be carried out, which is conducive to reducing costs and controlling quality.

3) On-site installation does not require construction of large-scale equipment, and the installation is convenient. It is more suitable for projects such as lack of human resources or high risk, plateau and hypoxic areas.

4) It reduces the amount of water condensation, block stone or gravel, sand, etc., and is more suitable for areas with lack of sand and gravel resources or remote areas with long transportation distances such as cement and steel; The environmental implications are far-reaching.

5) It is beneficial to improve the uneven settlement of special foundation structures such as permafrost, soft soil, expansive soil, collapsible loess, etc., improve the performance of highway service, and reduce the cost of post-construction maintenance.

6) Solve the problem of damage to the concrete structure of bridges and culverts in cold areas and frozen soil areas in the north (frost heave and thaw settlement).

7) It is conducive to improving the "dislocation" phenomenon at the junction of soft soil foundation structure and embankment, improving the comfort and safety of driving, and reducing the cost of post-construction operation and maintenance.

8) The corrugated pipe has high rigid strength, reasonable structural stress, uniform load distribution, and certain anti-deformation ability. Structurally, it has the property of transversely compensating for displacement.

9) The wall of the steel bellows culvert adopts the form of corrugation, which increases the surface area of the culvert in contact with the atmosphere, and the corrugated shape increases the friction coefficient of the inner surface of the tube, so that the atmospheric rheological turbulence enhances the heat exchange performance of the two-person tube. On the other hand, the bellows has a more obvious effect of transverse compensating displacement, and the effect of transverse compensating displacement becomes stronger with the decrease of diameter. Therefore, the steel bellows culvert has little disturbance to the foundation, no water seepage, and short construction period, which is conducive to maintaining the hydrothermal balance of permafrost.

Bellows culvert, also known as metal corrugated culvert or steel corrugated culvert, refers to the culvert buried in the highway and railway with threaded bellows, it is made of corrugated metal sheet coil or made of semi-circular corrugated steel sheet circular bellows, widely used in highways, railways, bridges, passages, retaining walls and various mines, roadway retaining wall support and other projects in the culvert (pipe).

Compared with reinforced concrete pipe culverts, corrugated pipe culverts have the advantages of thin pipe sections, light weight, easy transportation and storage, simple construction technology, fast assembly and short construction period.

When building bellows, it can be assembled into any length at will according to the need, and if necessary, the pipe section can also be dismantled and moved to other places for construction, and the advantages of the bellows culvert are more significant in areas lacking sand and gravel materials or areas with low foundation bearing capacity.

Bellows culvert has long been widely used in foreign highways, railways and housing construction projects, some developed countries not only have factories to manufacture corrugated pipe sections, but also some countries have issued design and construction specifications or procedures for corrugated pipe culverts. Before the liberation of China, the highway and railway departments also used bellows pipe joints imported from abroad. At present, China has a factory specializing in the production of corrugated pipe culverts, in view of the many advantages of this kind of pipe culverts, China's steel production has been in the forefront of the world, and the prospects for the promotion and application of corrugated pipe culverts in China are very broad.

High strength, due to its unique corrugated structure, it is more than 15 times greater than the compressive strength of cement pipes of the same caliber.

It is easy to transport, and the weight of the corrugated pipe culvert is only 1 10 to 1 5 of the cement pipe of the same caliber, even if there is no transportation equipment in a narrow place, it can be transported manually.

Long service life, steel bellows culvert is made of steel pipe hot-dip galvanized, so the service life is long, the life is 80-100 years, when used in a particularly corrosive environment, the use of steel bellows with bitumen attached layer on the inner and outer surfaces, can be improved by about 20 years on the basis of the original service life.

Convenient construction: the bellows culvert is connected by sleeve or flange, and the length can be customized according to the need, even non-skilled workers can operate, and the construction can be completed in a short time with a small amount of manual operation, which is fast and convenient.

Excellent economy:

The connection method is simple, which can shorten the construction period.

Culverts in highway engineering are generally made of reinforced concrete. Now the use of metal corrugated culvert instead of reinforced concrete concrete for culvert construction in the country a new technology, metal corrugated culvert with its stable performance, easy installation, favorable environmental protection, low cost and other advantages of fiber reduction quickly in the highway construction instead of reinforced concrete construction culvert, the development prospect is very broad, the car bridge burns broadly.