What are the advantages of road rail dual purpose bridges compared with general bridges?

Only one row of railway piers was needed to reduce costs. The appearance is also more spectacular than that of a single use, and it occupies less water area, which is beneficial to the activities of the boat.

For bridges or extra-large bridges with complex foundation engineering and high pier cost.

In order to reduce the cost and shorten the construction period, a bridge shared by road and railway can be considered to be built at the same time, which is called a road and railway bridge.

When planning the road-rail dual-purpose bridge, the design width of the highway bridge deck is related to the road transportation volume. In general, if the railway is a single track, the road is two lanes (sometimes three lanes). For double-decker bridges, if the railway is a double lane, the highway design should be no less than four lanes.

The significance of the completion of China's first cross-sea road and railway bridge:

With the development of science and technology, cross-sea road-rail bridges have also been built. During the National Day, China's first cross-sea road and railway dual-purpose bridge is located in Pingtan City, Fujian.

The strait was opened to traffic for the first time, and this time the dual-purpose bridge was opened to traffic, and China's scientific and technological development has entered a new era and a new level.

Fujian Pingtan Strait Cross-Sea Road and Railway Bridge, which is China's first road and rail bridge. The structure of the bridge is divided into two levels. The upper bridge is used for highways, and the upper bridge is a six-lane road with a speed of 100 km/h.

The six-lane highway is very spacious and also solves the problem of traffic congestion.

The lower level is designed as a two-track railway with a speed of 200 kilometers per hour. It is not easy to realize the construction of such a double-decker and dual-purpose railway, because it needs to have a very stable structure to take into account the load-bearing problem of the bridge. Another great thing about this road-rail dual-purpose railway in the Pingtan Strait in Fujian Province is that the bridge is cross-sea, which has higher requirements for the stability of the bridge structure.

If it's across the sea, it's very good.

A dual-purpose highway bridge is a kind of bridge that can be used for vehicles and trains at the same time, also known as road-rail dual-purpose bridges or railway-highway dual-purpose bridges.

The information required for the construction of road bridges includes:

1. Design documents, including design plans, construction drawings, etc.;

2. Material certification, including material certification of the main components of the bridge, such as steel, concrete, etc.;

3. Technical specifications, including design specifications, construction specifications, etc.;

4. EIA report, highway dual-purpose bridges need to carry out environmental impact assessment, and EIA reports need to be provided;

5. The construction plan should include detailed construction process, construction arrangement, construction methods, etc., to ensure construction safety and quality;

6. Supervision documents, including supervision plans, supervision plans, supervision reports, etc.;

7. Safety assessment report, highway dual-purpose bridges should be subject to safety assessment, and safety assessment reports need to be provided;

8. Completion acceptance documents, including completion acceptance report, completion atlas, etc.;

9. Bridge maintenance planning, it is necessary to formulate a maintenance plan for the bridge to ensure the long-term stable operation of the bridge.

The main functions of dual-purpose highway bridges are:

1. Improve the efficiency of road traffic, highway dual-purpose bridges can be dry to allow highways and railways to share the same bridge, avoiding the construction of two independent bridges in the same section of railways and highways, Zheng Wei saves resources and land, and also improves the traffic efficiency of railways and highways;

2. Reduce the construction cost, the dual-purpose highway bridge can reduce the construction cost of the bridge, because the highway and the railway use the same bridge, reducing the construction of materials and human resources;

3. To protect the environment, dual-purpose bridges can avoid damaging the ecological environment and reducing environmental pollution in order to build independent railway and highway bridges;

4. Promote regional development, highway dual-purpose bridges can accelerate the development of the regional economy, promote inter-regional connections and development, and improve regional service capacity and traffic efficiency.

To sum up, the dual-purpose highway bridge is an important type of bridge that can effectively improve the efficiency of road and railway traffic, reduce construction costs, protect the environment, and promote regional development.

Legal basis]:

Article 21 of the Regulations of the People's Republic of China on Highway Safety Protection.

If the dredging operation is carried out within 500 meters of the upstream and downstream of the river spanned by the highway bridge in accordance with the law, it shall meet the safety requirements of the highway and bridge, and the safety can only be carried out after the highway management agency confirms the safety.

1. All road-rail bridges:

Wuhan Tianxingzhou Yangtze River Bridge.

Jiujiang Yangtze River Bridge.

Huanggang Yangtze River Bridge (under construction).

Wuhu Yangtze River Bridge.

The following are just railway bridges.

Anqing Yangtze River Bridge (under construction).

Nanjing Dashengguan Yangtze River Bridge.

Yiwan Railway Yichang Yangtze River Bridge.

Wanzhou Yangtze River Bridge.

Yichang Zhicheng Yangtze River Bridge.

This question needs to be contributed by netizens from all over the world.

I'm going to contribute a Songpu Bridge in Shanghai, located in the upper reaches of the Huangpu River, built in the era, with two lanes on the upper deck (one back and forth) and the lower one for the Jinshan branch line (single-track railway).

First, the nature is different.

1. Highway bridges: system.

It is a highway that crosses waters, valleys and all traffic in Bai.

Planning, design, and structuring of the DU channel

DAO construction, maintenance, repair and other work.

2. Railway bridge: It is a structure for highways to cross waters, valleys and all traffic channels.

Second, the characteristics are different.

1. Highway bridges: Highway bridges can be built together with other engineering buildings. Some highway bridges are built together with railway bridges, such as Wuhan Yangtze River Bridge and Nanjing Yangtze River Bridge, which are dual-purpose bridges for railways and highways, with the highway on the upper level and the railway on the lower level.

Some highway bridges are erected on the top of the sluice and dam, becoming a bridge and gate dual-purpose bridge. Some highway bridges are equipped with oil pipelines or gas pipelines, which become highway bridges that are also used for oil and gas pipelines.

2. Railway bridges: railway bridges have large loads, large impact forces, high traffic density, and high standards that can resist natural disasters, especially the structure requires certain vertical transverse stiffness and dynamic performance.

Difference bai:

The main thing is the load to consider.

DU is not the same.

The railway is important to be alive in the zhi train, dao

Highway considering steam 20, super 20, hanging special 120, etc., the width of the bridge surface of the railway bridge is usually not as wide as the highway and the city.

Railway bridges generally have standard spans, but the pile length is different, and highway bridges do not have standard spans, which generally depend on the actual situation.

Permanent action Bishuxun is the load action that has been acting on the bridge, such as the dead load of the bridge; Variable action refers to the load action that will change during use, such as vehicle load, crowd load, wind load Accidental action refers to the load that may or may not appear, such as **. The load combination of the highway takes into account the two types of limit states of bearing capacity and normal operation, while the railway bridge regrets that the beam is still in the load combination according to the previous allowable stress method.