What is post pouring tape after settlement? What is the difference between slab wall beams in the se

Pouring belt after settlement.

It is retained during the construction period, in order to resist the uneven settlement of the building and set up the post-pouring belt from the foundation, the width is 800-1000, the vertical vertical retention, the basement part should take waterproof measures, usually more than 40 days or according to the design requirements time, the use of a higher grade of concrete pouring, and strengthen the maintenance.

Plates, walls, and beams should be located in places with less stress in the post-pouring belt, and there is no difference in setting, but it is best to communicate up and down, and do not misplace.

The so-called post-settlement pouring belt refers to the post-construction pouring belt set up on the basement floor, roof and exterior wall in order to reduce the uneven settlement of the building. The post-settlement pouring belt is mainly used for the basement part, because the waterproof requirements of the basement generally do not have settlement joints, and the above-ground parts should be provided with settlement joints. After settlement, the pouring belt should be closed with a higher grade of micro-expansion concrete after the building settlement is relatively stable.

That is to say, in the post-pouring belt part, the reinforcement of the reinforcement is strengthened, and the increase is 30% of the number of reinforcement of the original beam, that is to say, it is equal to 130% of the original

The post-pouring belt is a post-pouring belt set up to solve the settlement difference between the main building and the podium of the high-rise building, which can only be poured after the main structure is finished and the settlement is basically stable.

The post-pouring belt temporarily divides the structure into several parts, and after the internal shrinkage of the components, the concrete of the construction joint is poured after a certain period of time, and the structure is connected into a whole zone. The pouring time of the post-pouring belt should be selected when the temperature is low.

It can be used to pour cement or cement mixed with a trace amount of aluminum powder concrete, and its strength grade should be one level higher than the strength of the component, so as to prevent cracks between the new and old concrete and the formation of weak parts. The location of the post-pouring belt should also consider the different consumption factors of the template and other measures.

Precautions. The pouring time of different types of post-pouring belt concrete is different: the telescopic post-pouring belt depends on the completion of the shrinkage of the first-poured part of the concrete, which is generally 60d after construction; After settlement, the pouring belt should be carried out after the settlement of the building is basically completed.

In some projects, the design unit has special requirements for the retention time of the post-pouring belt, and the concrete of the post-pouring belt should be poured according to the design requirements.

The concrete of the post-pouring belt must be prepared with non-shrinkage concrete, which can be prepared with expanded cement, or by adding admixtures with intumescent effect and ordinary cement, and the strength of the concrete should be increased by a grade, and its mix ratio is determined by the test.

According to the national standard: the definition of the post-pouring belt in Article 1 of the Construction Code for Concrete Structure Engineering is: in order to adapt to the influence of factors such as environmental temperature changes, concrete shrinkage, and uneven settlement of the structure, the concrete belt with a certain width and after a certain period of time is reserved in the beam, slab (including the foundation bottom plate), wall and other structures.

The so-called post-settlement pouring belt is set up to prevent uneven settlement between two buildings, and the concrete pouring of the post-settlement pouring belt can only be carried out after 7 days after the main body is poured and smashed.

It should be more than 40m in the middle of the raft foundation to leave a settlement post-pouring belt, in order to prevent the uneven settlement of the main structure (generally two units). Wait until the end of the secondary structure before pouring concrete.

If the design is sedimentationPost-pouring tapeIt is necessary to wait for the floor to reach 90% of the load before watering, if it is a telescopic pouring belt can generally be watered after 40 days. Before watering, the concrete on both sides of the post-pouring belt should be chiseled new, and then watered with a slightly expanded concrete that is one level higher than the original concrete.

The position and distance of the post-pouring belt are determined by design calculation, and its width is considered to be simple in construction and to avoid stress concentration, which is often 800 1200mm; When setting up a post-pouring belt in a part with waterproof requirements, a waterstop should be considered.

Structure; After setting up the post-pouring belt part, the consumption factors with different contents of the template and other measures should also be considered; The strength grade of the concrete filled at the post-pouring zone.

It must be one level higher than the original structure.

Sedimentation type. There are many subsidence cities in China. According to the geological environment where the land code or surface subsidence occurs, it can be divided into three modes:

1) Modern alluvial plain models, such as the Northeast Plain, North China Plain, and the middle and lower reaches of the Yangtze River Plain in China.

2) Delta.

Plain patterns, especially in modern alluvial delta plain areas, such as the Yangtze River Delta, belong to this type. Land subsidence in Changzhou, Wuxi, Suzhou, Jiaxing and Xiaoshan all occurred in this geological environment.

3) The faulted basin model can be divided into two types: offshore and inland. Offshore refers to coastal plains, such as Ningbo; The inland type is the lake alluvial plain, such as the land subsidence of Xi'an and Datong can be used as a representative.

Summary. The difference between the temperature post-pouring belt and the settlement post-pouring belt is that the function is different: the former can prevent the problem of tensile cracking, while the latter mainly solves the settlement problem of buildings and podiums and reduces the impact of temperature stress.

What is the difference between the temperature post-pouring belt and the settlement post-pouring belt?

The difference between the temperature post-pouring belt and the sinking and post-pouring belt is different: the former can be used to prevent the problem of tensile cracking, while the latter mainly solves the settlement problem of buildings and podiums and reduces the impact of temperature stress.

The pouring time is different: the former should be poured after the main structure is finished or stabilized, while the latter should be poured at low temperature.

Post-pouring refers to the setting of cracks in the concrete in order to prevent the heat of hydration and the stress deformation of the steel bar in the large-volume concrete. It is to water the whole concrete after it is stabilized and then watered with a higher grade concrete. The reinforcing belt is generally set in the ultra-long structure, the weak part of the structure is arranged, and at the same time, the expansion agent is added to the concrete, and the concrete on both sides of the reinforcing belt is squeezed to offset the cracks caused by the large shrinkage and deformation of the overly long vertical structure.

Therefore, the pouring of the large and strong belt concrete in the trapping cavity is poured together with other concrete in the same part of the round source.

Summary. Hello dear, the method of distinguishing between the telescopic post-pouring belt and the settlement post-pouring belt is as follows: 1. The telescopic post-pouring belt is set up to prevent the concrete from changing and shrinking due to temperature change and shrinkage due to excessive construction area (generally it can be poured 60 days after the concrete is formed on both sides).

2. The post-pouring belt of settlement is mainly set up to solve the settlement difference between the main building of high-rise buildings and the podium (it can only be poured after the main structure is finished and the settlement is basically stable).

Hello dear, the method of distinguishing between the telescopic post-pouring belt and the settlement post-pouring belt is as follows: 1. The telescopic post-pouring belt is set up to prevent the refueling concrete from changing and shrinking due to the change and shrinkage of the temperature bending slag due to the excessive construction area (generally it can be poured 60 days after the concrete is formed on both sides). 2. The post-pouring belt of settlement is mainly set up to solve the settlement difference between the main building and the podium of high-rise buildings (it can be poured and buried only after the main structure is finished and the settlement is basically stable).

What type of post-pouring belt must be specifically determined according to the type of project, the engineering part, the on-site construction situation and the structural stress. The disconnection or penetration of the rebar of the post-poured belt lies in the type of post-pouring belt joint. For the pouring belt after settlement, it is better to penetrate the steel bar; For the post-shrinkage pouring belt, it is better to disconnect the reinforcing bar; If the steel bar is not opened, the concrete shrinkage near the hail of the steel bar will be constrained, and the tensile force of the steel bar will lead to cracking, thereby reducing the ability of the structure to resist temperature changes.

Summary. Hello dear, it is possible to set the pouring belt on the laminated plate after settlement.

Ok thanks.

Hello dear, it is possible to set the pouring belt on the laminated plate after settlement.

The post-pouring belt is a post-pouring belt that is set from the foundation in order to resist the uneven settlement of the building during the construction period; The width difference is 800-1000, the vertical vertical is retained, and the lower part of the floor rent should be waterproofed; Generally, more than 40 days or according to the design requirements, the bird is poured with a higher grade of concrete, and the maintenance is strengthened. Plates, walls, and beams should be located in places with less stress in the post-pouring belt, and there is no difference in the setting, but it is best to connect up and down, and do not misplace.

According to the requirements of the design or construction specification, a temporary construction joint is left at the corresponding position of the foundation bottom plate, wall and beam, the structure is temporarily divided into several parts, and after the internal shrinkage of the component, the concrete of the construction joint is poured after a certain period of time, and the structure is connected into a whole.

Function: 1. Solve the settlement difference. 2. Reduce the influence of temperature shrinkage.

Construction joints: joints left in the sections of each construction unit due to the needs of the construction organization. The construction joint is not a real "joint", it is only because the post-poured concrete exceeds the initial setting time, and there is a joint surface between the concrete poured first, and the joint surface is called the construction joint.

Settlement joint: between the various parts of the superstructure, due to the large difference in the number of layers, or the difference in the use of load; Or because of the large difference in the compressibility of the foundation, in a word, when the uneven settlement of the foundation may occur, it is necessary to set a joint to divide the structure into several parts, and the beam cover makes the settlement of each part of it relatively uniform, so as to avoid additional stress in the structure, and the joint is called "settlement joint".

Expansion joint: If the plane size of the building is too long, due to thermal expansion and cold contraction, it may lead to excessive temperature stress in the structure, and it is necessary to set up joints at a certain length of the structure to divide the building into several parts, which is the temperature joint. For different structural systems, the distance between expansion joints is different.

The construction joint is the construction rubber joint produced by another pause in the concrete pouring process. It has no fixed location, as long as it is within the scope of the retention allowed by the specification. Its treatment is relatively simple, only need to repair the mortar at the joint, where the vibrating and compacting is enough.

Post-pouring tape is the result of the design layout of the building. Generally, the design designates the retention position. There are strict requirements for the treatment of the post-pouring belt, and the pouring time, concrete number, and reinforcing bar retention must be constructed in accordance with the requirements of the specification.