Why does the current foundation, which can withstand a building several hundred meters high, not col

High-rise buildings can't just rely on load-bearing columns to increase their pressure. The technician came up with another solution, which was to add steel bars to the concrete, choosing steel bars with good hardness and compressive resistance in order to better withstand the weight. This is basically the case with construction sites now.

When we see them building houses, we see a lot of rebar. They are bundled into circles or squares with steel bars and then cement is added on top. In this way, the combination of the two will solve the problems of our workers.

From a mechanical point of view, a skyscraper fixed to the foundation resembles a cantilever embedded in the wall. Skyscrapers usually have basements. Some basement floors are located directly on the bedrock; Some floors have columns underneath that transfer the weight of the building to a layer of bedrock or hard soil.

Therefore, the strength and deformation control of the foundation of the high-rise building are reliably guaranteed, and the upper part of the high-rise building also has reliable strength and stiffness to resist the action of horizontal wind or ** force.

Horizontal lateral displacement or torsion can also occur in buildings under the action of horizontal forces. In order to control the lateral displacement and torsion of the structure within a certain range, it is key to improve the lateral displacement and torsional stiffness of the structure. The development of the structural system of skyscrapers is based on this idea.

The structural system of high-rise buildings has undergone the development process of support frame, flexural frame, shear wall, frame, core tube, outer frame tube, outer support tube, multi-pipe, core tube, boom, giant column system, etc.

Due to the cantilevered nature of skyscrapers, the effective width must increase with height. Strengthen the rigidity of the outer frame barrel structure and increase the effective width of the vertical cantilever arm. The core tube boom truss structure is adopted.

The effective width of a vertical cantilever increases with its stiffness. The result of these methods is that although the skyscrapers rise into the clouds, they remain as stable as rocks. The famous Guangzhou West Tower adopts a pipe-in-tube system of steel tube concrete columns, oblique grid outer cylinder and reinforced concrete inner cylinder.

A huge concrete block can be added to the top of the skyscraper so that its base can be connected to the walls of the building. In this way, even in windy weather, the skyscraper will move and shake under the concrete blocks, and the spring push and pull on the left and right sides will bring the building back to the center position, thus controlling the excessive shaking of the building.

Because the current foundation is particularly firm, and the current construction personnel are very solid, it is normal for such a foundation to withstand hundreds of meters of buildings without collapsing.

This is because the current foundation is tens of meters deep, and the current foundation is made of hard steel structure, so the building that can withstand tens of meters high will not collapse.

Now there is an increase in rubber in the foundation, which can effectively prevent earthquakes, and the building has also increased a lot of support to effectively prevent the consequences of **.

01 In modern skyscrapers, the foundation is often tens of meters underground. As long as the foundation can effectively transfer and disperse the load of the building, even on a soft soil foundation like Shanghai, it can greatly reduce the settlement of the foundation soil layer, eliminate uneven settlement, and make the building stand firm and immovable.

The building is brittle", "the building is crooked", "the building is cracked", ......People are no strangers to such online terms, and quality problems such as tilting or cracking of houses have become commonplace, and even buildings continue to sink at a rate of several centimeters per year. How can you tell if a building has such a safety hazard?

The buildings we see are really just part of the building—the part above the ground. What really supports the whole building is the foundation and foundation that we can't see. The foundation is the original rock and soil below the ground of the building, which is the result of the accumulation of weathering and sedimentation in the long geological history.

The foundation soil is generally layered, different soil layers have different compositions, ages, physical and mechanical properties, some soil layers are only a few centimeters thick, and some are more than ten meters thick. These soil layers have been basically formed under the action of their own gravity and will not undergo major deformation. However, if a house is built on the foundation, it is equivalent to applying an additional load to the soil layer, which will be compressed and deformed after compression, and the result is that the ground will begin to sink.

If the sinking speed and amount of settlement are different in different locations, the building will tilt and crack!

But don't worry, the engineers have come up with a great solution, which is to strengthen the foundation. The foundation is a load-bearing structure that is in contact with the foundation at the bottom of the building, and its role is to transfer the upper load of the building to the foundation. If you compare a house to a tree trunk, the foundation is like the roots of a tree, which are deeply rooted in the soil of the foundation and ensure the stability of the superstructure.

Common foundation forms include pile foundation, independent foundation, strip foundation, raft foundation, box foundation, etc., which are used to adapt to buildings with different structural forms. The foundation can take on the load of the upper building and transfer it to the hard soil layer deep in the foundation. The bearing capacity of the hard soil layer is high, not easy to deform, and at the same time, the uneven settlement of different load positions can be eliminated by adjusting the stress area and length of the foundation.

In modern skyscrapers, the foundation is often tens of meters underground. With a total height of 632 meters, nearly 1,000 bored piles have been driven underground, each with a length of more than 80 meters. As long as the foundation can effectively transfer and disperse the load of the building, even on a soft soil foundation like Shanghai, it can greatly reduce the settlement of the foundation soil layer, eliminate uneven settlement, and make the building stand firm and immovable.

If the design of some buildings is not reasonable, or the construction quality is not up to standard, tragedy such as "building cracking" may occur.

Because of the height of the building, the foundation can be stabilized with depth.

Mainly because the foundation is deep, these buildings are generally made of deep foundation pits, and those foundation pits can even reach dozens of meters, so the foundation of the building is very stable.

Because the foundation must be built firmly, and the foundation is also strong, the upper floors can be built to dozens of floors.

Because the foundations of these buildings are particularly deep, they are particularly safe.

For buildings in modern cities, the technology of the building is getting better and better, and the floor height of the building is getting higher and higher, so we will find that many floors have reached a height of several hundred meters, and this number continues to rise, so it is very surprising, but so many high-rise buildings we find that they seem to be very stable, and do not seem to make the foundation crumbling because of the height of the floor. So what is the reason why these high-rise buildings have such a high floor height and still not collapse?

The load-bearing method of this new building is very scientific, and generally when building a high-rise building, a deep pit will be dug in the ground before laying the foundation, and the deeper the foundation is buried, the more stable the house after the building is finally built. Generally speaking, if the house is relatively high, the depth of the foundation is also guaranteed, so a few hundred meters of high-rise buildings will generally build a deep foundation first, so as to ensure the stability of the building.

Generally, relatively low houses will set up load-bearing walls and some load-bearing beams and columns, etc., the raw materials of these things are generally cement, and now when building high-rise buildings, they will also choose to withstand this kind of thing, and the higher the floor, the more important the setting of the load-bearing columns is, first of all, the load-bearing columns themselves cannot be too thick, otherwise it will affect the furnishings of the building in the building, and the load-bearing columns that are too thick will make the space inside the building narrow, so in the setting of the load-bearing columns, these buildings will instead adopt other methods, In order to ensure that the indoor commercial space is sufficient, the building has a certain stability, after all, if the load-bearing column itself is too thick and too heavy, it may have a certain impact on the foundation, but will destroy the stability of the foundation.

In addition to the fact that a tall building is obviously not able to put all the pressure on the load-bearing columns, these technicians also thought of other methods, that is, to add steel bars to the concrete when building the building, so that it can bear more weight, and we will also see workers on the construction site to tie the steel bars into a circle or square and pour cement from the steel bars, so as to increase the degree of stability.

However, some particularly high floors are generally not set to a certain extent, and other methods are usually used to maintain the stability of the building, such as working on the structure of the building itself, so that the building itself presents a more stable structure, which can make the existence of the building itself more stable.

The building has a very stable foundation, and there are very professional workers to build it layer by layer, and the walls are very firmly fixed between the walls, so they will not collapse.

Because at the time of construction, the foundation was very stable, which led to the fact that such a tall building would not collapse.

Why can a building that is hundreds of meters tall stand tall? The engineer tells the truth, and that's called wisdom.

Because the building uses the rule of the triangle when building the building, and the triangle has stability, then the building will definitely not fall.

Frame shear wall structure.

When building the foundation, the engineer will conduct a geological investigation related to the foundation, and determine that there is no problem when it can be built, the foundation of the general building can be tens of meters deep, only in this way, the building will be more stable, the building will be built high, take China Zun as an example, the foundation is 40 meters deep, and there are eight floors in the basement, which is equivalent to a small high-rise. In the foundation of 40 meters, the engineer will drive piles, that is, the load-bearing column, the load-bearing column is composed of giant steel columns, each load-bearing is huge, but this is far from enough, concrete must be poured, the capacity of the concrete is 10,000 cm 3, the thickness of the bottom plate alone is meters, the foundation adopts the unique structure of the frame shear wall, after the foundation is built, it can withstand the pressure of tens of thousands of tons and the invasion of disasters.

Finally, for the construction of super high-rise buildings, the most important thing is the foundation, if the foundation is not strong, the building will be easy to collapse.

。In recent years, skyscrapers have risen from the ground to meet people's eyes, once Saudi Arabia spent a huge amount of money to build "the world's tallest" and attracted the world's attention, in fact, China's construction of high-rise buildings is also worthy of them.

First of all, the foundation is connected with the whole building, if the building is tilted, the surrounding soil layer will protect the foundation, will not move, so the building can not move, the foundation is mainly dependent on the surrounding environment, it is reinforced.

The foundation under the 500-meter-high building is large enough and deep enough to take root firmly in the ground, and strong enough to support the weight of the entire building, so that the entire building will not collapse easily.

Over the years, we in China have been building their own skyscrapers, for which foreigners often call us "infrastructure madness", in fact, this is a kind of praise and admiration for our Chinese architecture, and the buildings built in China are also very famous in the world, such as the Central Building in Shanghai, which is the tallest building in China (632 meters) and one of the tallest buildings in the world, and the tallest building in Beijing under construction, "China Zun" (528 meters), The name can reflect the majesty and dignity of this building, in fact, there are many high-rise buildings like this in China, I will not list them one by one, but for us people, we have always been curious about a question, that is, a building is more than 500 meters high, and the foundation under it is powerful? How does it bear the weight of the entire building? After reading the knowledge.

We all know that building a house is a laborious, time-consuming and expensive project, especially the construction of skyscrapers, which is an investment of tens of billions of dollars and a construction period of several years. But the construction of skyscrapers also represents the country's architectural level, which can play a great role in the world, and there is no lack of practicality, so many countries will build their own skyscrapers. But building a skyscraper is a very complex project, first of all, the foundation of the building, and we all know that in order to build a high, the foundation has to be dug deep.

When building the foundation of the building, the engineer will first investigate the geology of the foundation, and determine that there is no major problem with the soil quality when the construction can be started, the foundation of the general skyscraper can go deep into the depth of dozens of meters underground, and only in this way can the foundation of the building be more stable, the building can be built high, take the tallest building in Beijing "China Zun" as an example, the foundation of the whole building is 40 meters deep underground, and the basement alone has eight floors, which is equivalent to the small high-rise where we usually live. In the 40-meter-deep foundation, the engineer will begin to drive piles, that is, the load-bearing column, the load-bearing column of China Zun is composed of four giant steel columns of 34 meters * 32 meters, the load-bearing of each steel column is very huge, but this is not enough, it is necessary to pour concrete to the steel column and the foundation floor, it is understood that the capacity of the foundation of China Zun concrete has reached 10,000 cubic meters, and the thickness of a base plate alone has reached meters, and the entire foundation adopts a frame shear wall structure, after the foundation is completed, Able to withstand the pressure of the building's tens of thousands of tons of structural weight and various natural disasters.

Finally, the principal summed up, in fact, for the construction of skyscrapers, the most critical place should be the foundation, if the foundation is not firm, then the building is easy to collapse, and the foundation in addition to bearing the weight of the building, but also to bear the force of the building's lateral swing and the force generated, so the wind resistance and seismic properties of the skyscraper are very high, and the seismic level can reach the highest 8 degrees, so if we see a skyscraper, we don't have to worry about the building collapsing at all, Because it has a very solid foundation underneath.