Is there a good way to calculate the weight of the reinforcement cage of the underground diaphragm w

1. Calculation method:

There are two kinds of underground diaphragm wall reinforcement cages, one is a double-groove reinforcement cage with steel plates at both ends, and the other is a slotted reinforcement cage. Directly calculate the length of the steel bar, the length, width and thickness of the steel plate. Then multiply by the theoretical weight.

2. A brief introduction to the underground diaphragm wall:

Diaphragm wall excavation technology originated in Europe. It is developed according to the method of drilling wells and oil drilling using mud and underwater pouring concrete, in 1950 in Milan, Italy, the first use of wall protection mud underground diaphragm wall construction, in the 20th century 50 60s The technology was promoted in the western developed countries and the former Soviet Union, becoming an effective technology in underground engineering and deep foundation construction.

Underground diaphragm wall is a kind of trench digging machinery on the ground of foundation engineering, along the perimeter axis of deep excavation project, under the condition of mud wall protection, excavate a narrow deep groove, after the groove is cleared, the reinforcement cage is hoisted in the groove, and then the conduit method is used to pour underwater concrete to build a unit groove section, so that it is carried out section by section, and a continuous reinforced concrete wall is built in the underground, as a water interception, seepage, load-bearing, water retaining structure. The characteristics of this method are: the construction vibration is small, the wall stiffness is large, the integrity is good, the construction speed is fast, the earth and stone can be saved, it can be used for the construction of deep foundation pit support and reverse construction in dense building groups, and can be used in various geological conditions, including sandy soil layer, gravel layer construction below the particle size of 50mm.

It is suitable for the construction of basements, underground shopping malls, parking lots, underground oil depots, retaining walls, deep foundations of high-rise buildings, reverse construction envelope structures, deep pools and pits of industrial buildings; Shafts, etc.

The reinforcement calculation of diaphragm underground walls includes main reinforcement, distribution reinforcement, tension reinforcement, casing reinforcement, etc. It is necessary to calculate its single root length, the number of roots, and in the calculation of the engineering quantity, the engineering quantity is equal to its single length multiplied by the number of roots multiplied by its theoretical weight. Theoretical weights can be found on the Internet.

The main reinforcement, horizontal reinforcement and truss reinforcement can be added together.

Do you count what is the weight of the rebar or what? Or is it carrying capacity?

Draw a hoisting drawing, and then measure directly on the drawing. Draw to scale.

There is no fixed formula, but you can list an algebraic formula by the diagram to calculate.

Unclear question, what is the spacing of diaphragm wall reinforcement? to be sure.

Diaphragm Wall Panel Trench, Slury Trench, Slury Wall, Continuous Diaphragm Wall, Cut-Off Wall, excavation technology originated in Europe and was developed based on the method of drilling wells and pouring concrete under water using mud and water for oil drilling. In 1950, the trembling ruler was first used in Milan, Italy, for the construction of the underground diaphragm wall with mud retaining wall, and in the 50s and 60s of the 20th century, this technology was widely promoted in the western developed countries and the former Soviet Union, and became an effective technology in the construction of underground engineering and deep foundations.

The reinforcement cage stirrups of beams and columns shall not be welded to the longitudinal reinforcement, because the longitudinal reinforcement is the calculated stressed reinforcement, and some points that generate local stress shall not be created to affect the normal transmission of the internal force of the reinforcement;

In order to ensure that the reinforcement cage (bumps and hits the ground) enters the pile hole and does not cause stirrup spacing to be disordered, it is advisable to use full welding. And construction has become a habit.

There is no clear text in the above norms, there is no textual basis, only reasoning. After a long period of practice, I believe that there will be clear regulations in the future.

What are the requirements of the diaphragm wall construction code.

1. The single-layer continuous wall should be directly used for the waterproof grade engineering wall plate, and the single wall right should be used for the engineering wall, and the high-polymer mud wall protection material should be used.

2. The wall thickness should be 600mm

3. The wall protection mud and mix ratio should be selected according to the qualitative conditions, and the mix ratio of water, salt or chemical pollution mud should be adjusted.

4. The allowable deviation of the flatness of the wall surface of the renovation of the unit groove section should be 50mm5, and the groove should be cleaned and replaced before pouring concrete, and the sediment thickness should be in loomm, and the mud skin and sundries on the joint surface should be cleaned up.

6. The reinforcement cage should be soaked in mud, and the thickness of the protective layer of the reinforcement should be 70mm