Two Cases for Large-Span Corrugated Steel Plate Structure

large-Span Horseshoe Shaped Corrugated Structure Plate Bridge

This project located in a tourist area in Handan city, Hebei province. The specification of this bridge as below

Span: 15.3m

Height: 10.6m

Corrugation: 380*140mm

Steel Plate Thickness: 9.0mm

Bridge Width: 9m

The cross-section of the structure is horseshoe-shaped, with specification of narrow at the top and wide at the bottom, it has unique advantages for passage engineering, but the force of the arch toe is relatively unfavorable, requiring strict force analysis and special structural measures.

10m Diameter Multi-Plate People Tunnel

In Guangdong has a township road-179, the road width is 5m, the original design is to set a middle bridge with 25meter length, the net width under the bridge is about 9m, the township road is changed to pass under the bridge, then change the road width to 7m. The township road is an important passage connecting three larger natural villages (with a permanent population of about 18,000). The local people reported that the original design road change could not meet the local travel requirements. After many consultations with the local government, for long-term considerations, a channel with a diameter of not less than 1-8*5.5m should be added to the original road, and it is recommended to choose a plan, with a shorter construction period and complete the construction as soon as possible, to maximize to minimize the resistance of local people and maintain social stability, it was decided to adopt a 10m diameter steel pipe channel scheme after comprehensive consideration.

The angle between the steel corrugated pipe channel and the route is 42°, the culvert length is 120.68m (including the steel corrugated pipe at the entrance of the tunnel). The entrance and exit of the culvert are bamboo-cut + eight-character walls, and the culvert serves as drainage. In order to reduce the length of the culvert and increase the brightness in the cave, The subgrade slope rate was adjusted according to the review opinions of the plan. The primary slope rate was adjusted from 1:1.5 to 1:1, and the secondary slope was adjusted from 1:1.75 to 1:1.5, and the secondary platform was cancelled. The steel-plastic grille is added in the subgrade to minimize the length of the culvert while ensuring the overall stability of the subgrade.

For the calculation of the bellows, the ultimate load method is used to calculate the structure, and the soil weight is calculated according to the theory of soil column weight. The live load does not consider the friction between the top soil column and the surrounding fill. The angle distribution method is used for calculation, semi-infinite elastic body Theoretical accounting.

The wall thickness of the corrugated steel culvert is designed in sections according to the different filling heights. The wall thickness chooses 8mm at of the hole and the lower filling party, and the wall thickness choose 10mm at the party of the middle filling.

The corrugated size of steel corrugated pipe is 400×150mm. The culvert pipe adopts the installation method of outer ring and inner ring, and the inner and outer rings are assembly by 6 corrugated plates.

New Application of Corrugated Steel Structure – Shed Tunnel for Against Wind & Snow in The Wind District of Mayitas

In northern China (especially Xin’Jiang, Qing’Hai, and Tibet), avalanches,snowstorms,and other disasters often occur due to climatic reasons,which is a huge danger to road traffic safety. The harm of wind and snow to highway traffic is mainly to reduce visibility and cause snow cover on the road. The road maintenance department and the traffic management department need to invest a lot of power and money every year to prevent snow damage and ensure traffic safety. The corrugated steel shed is a device that can be used to prevent snow cover on the highway in some certain extent. It plays a vital role in road safety.

Xinjiang’s Tacheng area has good air quality, beautiful scenery, and unique humanities. It has always been a tourist destination that people long for. It should take 201 provincial road To get in and out of Tacheng area, and there is a Mayitas wind zone with a length of 40 kilometers on this road. The annual average winds greater than or equal to 8 are more than 150 days, up to 180 days, and the maximum wind speed is 40 Meters / second. Once it encounters a snowy day, the wind blows snowflakes and blocks the view. The snow formed by the wind blows snow up to 7-8 meters, which makes the road traffic closed and brings great inconvenience to people.

The corrugated steel structure shed is located on the section 201 provincial road from section Er’min to section Tie’Chang’Gou, which is the strongest wind. Its surface like a tunnel, which height 8.4meter, width 13meter and totally length 300meter. Mainly body is by 118PCS of cement column, wind break wall and corrugated steel structure , It is reinforced concrete frame structure, can withstand 12 strong winds, the main body life is 50 years. At the same time, a 330-meter snow net and a 510-meter snowboard were built around the shed.

This is the first snowstorm project in Xinjiang to be used on highways to study the effects of shed tunnels on the management of Mayitas snowstorm disasters. After observing the effects of a winter from 2018 to 2019, the shed tunnel project will be promoted in the entire section of the Mayitas wind-blown snow section, which will completely solve the problem that hinders the masses from traveling in winter.

Internal Structure of Shed

The road corrugated steel plate shed can resist wind and snow disasters, avalanches and other disasters, ensure the protection of highway capacity when disasters occur, and effectively solve the problem of snow disasters on highway vehicles. It has the advantages of simple structure, convenient manufacturing and construction, low cost, fast construction speed, and superior mechanical properties. can be widely used in highway protection projects in heavy snow disaster sections, and can effectively solve the related problems existing in the highways prone to snow disaster. will certainly have a great leading role in the development of highway disaster prevention.

Flowered Corrugated Steel Pipe’s Application in Drainage of Highway’s Sub-grade

In China’s southern areas, there are lots of precipitation and sandy land along rivers, and the long-term erosion and scouring of rainwater will seriously affect the load-bearing effect of roadbed and the reliable service life of road.

The traditional road drainage system is to dig diversion ditches at roadside, but the diversion ditches will take away a lot of roadbed soil under rain erosion. It not only increases the maintenance cost, but also seriously affects the safe service life of the road.

Therefore, increse the reliability of roadbed and reducce the impact of preciptation on roadbed, improve and strengthen the foundation pavement is an urgent problem to be solved at present.

Flowered Corrugated steel Pipe is a kind of seepage drainage pipe which can increase the drainage efficiency of road surface, reduce the water content of roadbed, and reduce the erosion of roadbed by water

In order to ensure the stability of the subgrade, meet the design and operation requirement, The corrugated steel pipe body is scattered with water seepage holes, mainly in the way of seepage collection water, and nearby discharged from the subgrade, reduce the subgrade underground water level, make the subgrade in a dry state.

Comparision of Service Life of Corrugated Steel Pipe with Different Anticorrosion Methods

Metal with Galvanized Coating
AreasCorrosion AmountService LifeCalculation Method
Heavy Industrial Area21.126Service Life = (Galvanized Content/Corrosion Amount)*90%
Coastal Area9.557
Suburban Area5.3102
Urban Area13.241
Galvanized Content=600g/㎡ (84μm)
Additional Service Life of Non-metallic Coating and Lining (CSPI)
CoatingSide Touch WaterSide Touch Soil
Additional Life (Years)Maximum Abrasion gradeAdditional Life (Years)
Bitumen Coating2 – 20225 – 50
Bitumen Coating + Lining10 – 30325 – 50
Polymer Coating25 – 100350 – 100
Polymer Coating + Lining30 – 100350 – 100
The Bottom Arch is Coated with Polymeric Asphalt15 – 403
The Bottom Arch is Lined with Concrete or Plastic25 – 754