Bridge What is the difference between an abutment and a pier? 10

A bridge is a building that is erected on the water or in the air for easy passage, including abutments and piers. And the abutments, piers are just an integral part of the bridge.

Bridge qiáo name shape sound. From the wood, Joe sounds. Original meaning: bridge.

Bridges, water beams also. From the wood, Joe sounds. The one who did it. The single plank is called a bar. "Sayings".

Abutment qiáotái: A foundation structure located at both ends of the bridge that supports the superstructure of the bridge, and its function is to connect the bridge with the roadbed.

pier qiáodūn: the main support of the bridge, on which the superstructure of the bridge is located; It can be constructed of stone, steel, timber or concrete, and is built on a solid foundation below the silt at the bottom of the river.

The piers and abutments are the supporting structures of the bridge. The abutment is the supporting structure of the bridgehead at both ends of the bridge, and is the connection point between the road and the bridge, which is generally rigid. The pier is the intermediate supporting structure of the multi-span bridge between the abutments, which can be slightly flexible compared to the abutment

The abutment is the supporting structure of the connecting section between the two ends of the bridge and the highway, one is to bear the pressure of the bridge, and the other is to balance the earth pressure behind the platform. Abutments can basically be divided into the following categories: 1. Gravity abutment; 2. a light abutment; 3. a frame-type abutment; 4, combined abutment; 5. bearing the abutment.

The pier is the supporting structure in the middle of the bridge, which mainly bears the pressure of the bridge. Bridge piers can be mainly divided into the following categories: 1. Gravity piers; 2. a hollow pier; 3. a pile-type pier; 4. a column-type pier; 5. a flexible pier; 6. a thin-walled pier.

The abutment is the pillar of the bridge on the water, and the pier is the part under the water.

The abutment is the pier on the very edge.

A bridge pier generally refers to the intermediate support structure of a multi-span bridge, which is subject to the pressure of flowing water, the wind above the water surface, and the impact of possible ice loads, boats, rafts or drifting objects in addition to the load of the superstructure.

In addition to the structure that supports the bridge span structure, the abutment is also a structure connecting the embankment between the two banks; It must not only be able to retain the revetment, but also be able to withstand the additional lateral pressure generated by the backfill and the vehicle load on the fill.

The differences are as follows:

Abutment: A building located at both ends of the bridge to support the bridge superstructure and connect with the embankment. Its function is in addition to transferring the load of the bridge superstructure to the foundation.

It also has the effect of resisting the filling pressure behind the platform, stabilizing the bridgehead roadbed, and making the bridgehead line and the bridge line connected reliably and smoothly. The abutments are generally made of stone or plain concrete, while the light abutments are made of reinforced concrete.

Bridge piers: In bridges with two or more holes, except for the abutments that connect with the embankment at both ends, the rest of the intermediate support structures are called piers. Bridge piers are divided into solid piers, column piers, and row frame piers.

According to the plane shape, it can be divided into rectangular pier, tip pier, circular pier, etc. The materials of the construction piers can be wood, stone, concrete, reinforced concrete, steel, etc.

The abutment is arranged at both ends of the bridge, and in addition to supporting the bridge span structure, it is also a structure connecting the embankment between the two banks; It should not only be able to retain the revetment, but also bear the additional soil side pressure generated by the backfill and the vehicle load on the fill.

Therefore, the bridge pier abutment should not only have sufficient strength, stiffness and stability by itself, but also put forward certain requirements for the bearing capacity, settlement amount, frictional resistance between foundation and foundation, etc., to avoid the horizontal, vertical displacement and angular displacement of the whole structure of the bridge that are harmed under the above-mentioned load.

When using high abutments and high embankments, the technical safety and reliability should be carefully considered, as well as the long-term loss of occupying more land, and it is not appropriate to compress the length of the bridge simply by pursuing the saving of bridge engineering.

For example, mountain valley bridges should not be built with high abutments on steep slopes; Urban bridges are not easy to take soil and affect the city's appearance, and they often avoid high embankments and use approach bridges. The abutment of the arch bridge must bear the horizontal thrust of the arch foot, and the foundation requirements are higher, and the arch bridge is used to cross the V-shaped narrow valley, and the abutment is arranged on the rocky valley slope, which is conducive to bearing the thrust of the arch foot, and is often a better bridge arrangement.

The earth pressure behind the abutment and the weight of the subgrade fill around the foundation are bound to increase the stress and deformation in the foundation, so it is easy to cause the abutment to lean back and move forward, and the abutment built on the soft foundation should pay special attention.

The roadbed near the abutment should be filled with permeable soil such as gravel, and the surface drainage should be strengthened to avoid rainwater seeping into the roadbed; Or set up a blind ditch to drain the infiltrated water as soon as possible. In severe cold areas, in order to prevent frost damage to the fill, the filler and construction quality should be more strictly required. These measures are essential to ensure the stability of the embankment and reduce the earth pressure behind the platform.

<> bridge structure composition.

Let's look at this animation directly.,The animation that our school teacher gave us in class.,Bridge structure composition.,You can understand it at a glance.。 To summarize briefly, the piers and abutments are both supporting structures of the bridge, the difference is that the abutments are located at the beginning and end ends of the bridge, which is equivalent to the beginning and end of the bridge; Whereas, a pier is a pier stud between the start and end points.

To put it simply, it is the pillar used for support under the bridge, which is the pier; Then the abutment is something like a foundation that joins the road (some bridges may not have an abutment, or are in the water), and the piers can be built on the abutment.

One is the plan, the other is the façade.

1. The difference between arch bridge abutment and beam bridge abutment: different structures and different shapes.

1. The structure is different: in terms of structural stress, the beam bridge is bent, and the arch bridge is not only bent but also compressed. Due to the different forces on the structure and the different appearances, the beam bridges are all straight, while the arch rings of the arch bridges are circular.

2. Different shapes: the arch bridge bears the stress of the main span by pushing the arch body to the ground at both ends of the bridge. Modern arch bridges are usually lightweight, open in structure.

Arch bridges are generally built on water areas with smaller spans, and the bridge body is arched, and there are generally several bridge holes, which play the function of flood discharge, and the weight in the middle of the bridge is transmitted to both ends of the bridge, and the weight at both ends is transmitted to the middle.

2. Connection: The bridge is generally composed of the superstructure, the substructure and the auxiliary structure, and the upper part refers to the main load-bearing structure and the bridge deck system; The substructure comprises abutments, piers and foundations; Ancillary structures refer to bridgehead laps, tapered slope protection, bank revetments, diversion projects, etc.

Embedded abutments.

The abutment body is buried in the slope in front of the platform, and there is no need to set up another wing wall, only the ear walls at both ends of the cap are connected to the road. Embedded abutment, the platform body is a masonry entity, the cap and ear wall are made of reinforced concrete, when the slope in front of the platform has proper protection from being washed out, the active earth pressure of the landslide filling can be considered.

Therefore, the number of buried abutment masonry is relatively small, but because the slide extends into the bridge hole, compressing the river channel, sometimes the bridge length needs to be increased. It is suitable for multi-span bridges with medium spans where the head of the bridge is shallow, the slope is less scoured, and the fill height is less than 10m. When the geological condition is good, the platform body can be hollowed out into an arch shape to save masonry and reduce its own weight.

The abutment is the end of the bridge。The abutments are located at both ends of the bridge and one end is connected with the embankment, and the embankment is prevented from slipping; The other end supports the end of the bridge span superstructure. In order to protect the abutment and embankment fill, some protective works are often done on both sides of the abutment.

The pier foundation is a structure that ensures the safety of the bridge pier and transmits the load to the foundation. Foundation engineering is a difficult part of the whole bridge construction, and it often needs to be carried out in water, so the problems encountered are also complex.

The name of the abutment partThe abutment is divided into gravity U-shaped platform, pile platform, reinforced concrete light abutment, etc. Abutment refers to the part of the bridgehead at both ends of the bridge that is connected to the roadbed on the bank slope. The bridge superstructure includes the structural system and the bridge deck system.

The structural system includes various types of main beams. The components of the abutment include a cap, a chest wall, a side wall (ear wall), a lap board, a platform body, and a foundation from top to bottom.

AbutmentIt is the end of the bridge. Abutment refers to the supporting superstructure located at both ends of the bridge and connected to the roadbed and the structure that bears the pressure of the fill side of the bridgehead. At the shore or at the end of the bridge hole is between the bridge and the embankment.

Supporting structures at the joints. It plays the role of supporting the superstructure and connecting the roads on both sides of the river, while also blocking the filling behind the abutment.

The role of the abutmentThe abutment is one of the five major components of the bridge structure, which belongs to a part of the bridge substructure, and is arranged at both ends of the bridge. In addition to the above functions, it is also connected with the embankment to resist the earth pressure of the embankment; Prevent landslides and collapses of embankment fills. The abutments are located at both ends of the bridge and the cap beams.

Below one end, it belongs to the substructure, which mainly bears the load of the bridge deck and the cap beam.

And transfer the excavation load to the foundation and the soil behind the platform.