What are the steps of the construction process of the side wall of the platform body front wall ?

The bridge is mainly composed of three parts: the substructure, the superstructure and the auxiliary structure, and the main construction sequence is also according to these three steps.

1. Substructure:

The first is the foundation, including the pier foundation and the abutment foundation, and the foundation form generally has two types: expanded foundation and pile foundation.

The abutment is generally divided into gravity and light abutments (including ribbed abutments, pile abutments, etc.), and the general construction sequence is:

Gravity type: abutment foundation - front and side walls - cap - supporting pad stone.

Light abutment: pile foundation - bearing cap - platform body - cap, ear back wall - support stepping stone.

Bridge piers are slightly different according to their different types, and for pile-type piers directly connected to pile foundation conditions (i.e., no bearing cap), its construction sequence is generally: pile foundation - pile tie beam (if pier is not high may not be) - pier body - pier tie beam (if pier is not high may not be) - cover beam - support stepping stone.

In the case of cushion cap, pile foundation - cushion cap - pier body - cap beam - supporting pad stone.

1. The platform body and pier column in the bridge are not the same part. The abutment body generally refers to the front wall and side wall part of the gravity or reinforced concrete light abutment; And pier stud generally refers to the cylindrical or square column that the column-type pier is used to support the cap beam. 2. The cap and cover beam are somewhat complicated and need to be explained separately to be clear

1) Cap beam: Cap beam is used to connect the superstructure of the bridge on the column pier; For pile-type abutments, the part used to connect the superstructure is generally called a cap beam (some people call this a cap, which is actually inaccurate); 2) Table cap: generally used on the U-shaped abutment.

The biggest difference between the cap and the cap beam is that the stress conditions are different, the cap beam bears bending shear and axial compression, and the force is similar to that of the rigid frame beam (there are cantilevers at both ends, and there are also those that are not cantilevered), so it is called "beam". And the cap is mainly under pressure. It is relatively easy to distinguish between the two to understand the difference between the two conditions.

To the top of the thin-walled pier, the connecting part with the superstructure is generally not called the cap beam, and it is customary to call the cap beam, and this cap beam is different from the cap beam that is subjected to bending and shear action in the span in the stress characteristics. Some people are accustomed to classifying the cap beam as only used for the abutment, not for the pier, but most people don't think so, I also tend to the cap beam can be on the abutment, or on the pier, as long as it meets the stress characteristics of the cap beam, it can be said so. In order to answer this question, I also thought about how to explain it more clearly.

Typing is also very hard, word for word. I'll attach an illustration to help you understand. Turn left|Turn right.

Both the side walls and the platform belong to the bridge substructure, not the bridge foundation. The function of the platform body is to support the superstructure, transmit force, and resist the earth pressure behind the platform. The function of the side wall is to retainer the soil behind the platform and on the side of the platform, or for the slope, and has nothing to do with the load transfer of the bridge superstructure.

The bridge is mainly composed of three parts: the substructure, the superstructure and the auxiliary structure, and the construction methods of each part of different bridge types are different.

First, the substructure:

1. Foundation. Including pier foundation and abutment foundation, the foundation form generally has two kinds of enlarged foundation and pile foundation.

2. an abutment. Generally, it is divided into gravity and light abutments (including ribbed abutments, pile abutments, etc.), and the general construction sequence is:

Gravity type: abutment foundation, front wall, side wall, table cap, support pad stone.

Light abutment: pile foundation - bearing cap - platform body - cap, ear back wall - support stepping stone.

3. a bridge pier. According to its different types are slightly different, for the pile-type pier directly connected to the pile foundation situation (i.e., no cushion cap), its construction sequence is generally:

There is no cushion cap. Pile foundation, pile tie beam (if the pier is not high, there may be none), pier body, pier tie beam (if the pier is not high, may not be), cap beam, support stone.

There is a cushion cap. Pile foundation, platform, pier body, cover beam, support pad stone.

Second, the superstructure.

The more suitable construction method of the bridge superstructure will vary with the different construction sites, and mainly depends on the length and span of the bridge, the type of bridge, the foundation conditions and the materials used.

1. Small-span bridges.

When the span of the bridge is less than about 40 meters, its superstructure can be constructed by means of toenails supported on the ground. In other construction methods, the beams can be prefabricated as a whole and then erected using jacking beams or cranes. If the bridge is of equal span, the sum of the increased cost due to the erection of the equipment and the reduced cost due to the short construction period in the latter construction method will be lower than the formwork production cost of the former construction method.

2. Long-span bridges.

Long-span bridges are often prestressed concrete bridges in the form of continuous beams or cantilever beams. Many of the previous construction methods have been developed into the construction methods of continuous beam bridges. If the distance between the formwork and the ground is small and the soil is hard, the superstructure of the bridge can use the bracket construction method.

However, this method of construction has become increasingly outdated. At present, the free cantilever method and the mobile formwork method are becoming more and more widely used and can save time and improve safety.

3. Subsidiary structure.

Including bridge deck system, lap plate, guardrail, expansion joint, etc.

Bridge deck continuity, bridge deck pavement, sidewalk slabs (if there is a sidewalk), bridge deck drainage, guardrails, expansion joints, abutment laps.

Look at the picture race for yourself.

There are front walls and side walls on the inside and side of the picture! The following is based on the width of the front liquid fiber ha! If you look at it yourself, you can find it by Hui Fang.

First of all, a problem is corrected: the vertical concrete structural pier above the cushion cap; Below the cap, if it is a pile foundation, it is a pile. Bridge piers and caps, as well as pile foundations, belong to the bridge substructure.

Take ordinary highway bridges as an example:

1. The superstructure is the bridge deck system, the load-bearing beam, the cap beam and the box girder you said belong to the superstructure.

2. Substructure: piers, caps, pile foundations.

3. In fact, there are also ancillary structures of the bridge: bridgehead lap plate, conical slope protection, bank revetment, diversion engineering, etc.

Attached is a picture for you:

Hope it works for you......

The pile foundation is a pile drilled by a drilling rig under the cap or pier column; Beam is a general term, there are box beams, T beams, solid beams, hollow slab beams and some heterosexual beams. The cover beam is generally used in the simply supported beam bridge, above the pier column, the beam plate is connected, and the gravity of the beam plate is assumed. The box girder is the empty beam plate in the middle, there is a transverse partition plate in the middle, and the abutment is the cover beam, ear back wall and other structures at the two ends of the bridge.