How deep is the foundation for a 30 storey building?

Generally speaking, the building with about 30 floors should be more than 1 meter 5 deep, the foundation can play a stable role, the foundation refers to the soil or bunker that supports the foundation under the building, and does not belong to the part of the building, but he has a very important role in ensuring the durability of the building, the base has two types of natural foundation and artificial foundation, the natural foundation does not need to be manually reinforced, and the artificial foundation of the natural soil layer needs to be manually reinforced.

The foundations of the north and south buildings are different, generally at least 15 meters or more.

Foundation soils refer to the soil or rock mass that supports the foundation under the building. It is not an integral part of the building, but it plays a very important role in ensuring the durability of the building. There are two types of foundations: natural foundations and artificial foundations.

A natural foundation is a natural layer of soil that does not need to be reinforced by man. Artificial foundations need to be reinforced by people, and there are often stone chip cushions.

Sand cushion, mixed ash backfill and then tamping, etc.

Requirements: strength - the foundation should have sufficient bearing capacity;

Deformation - the settlement of the foundation needs to be controlled within a certain range, and secondly, the settlement difference of the foundation in different parts should not be too large, otherwise the upper part of the building will crack and deform;

Stability - the foundation must have the ability to prevent overturning and instability.

Stress – Appropriate pressure.

There are two types of foundations: natural foundations: natural soil layers that can be placed directly on the foundation without the need for treatment.

When the geological condition of the soil layer is good and the bearing capacity is strong, the natural foundation can be used;

Artificial foundation: The soil quality of the natural soil layer is too weak or the geological conditions are poor, and the foundation can only be built after artificial reinforcement or treatment.

And under the condition of poor geological conditions, such as slope, sand or silt geology, or although the texture of the soil layer is good, but the upper load is too large, in order to make the foundation have sufficient bearing capacity, it is necessary to adopt artificial reinforcement foundation, that is, artificial foundation.

The foundation depth of a two-story building is generally 1.5 meters.

If the foundation is very wide, it can also be buried shallower, but the depth should not be less than the outdoor ground, so as to play a protective role. The actual height should not be less than 1 15 of the height of the house on the ground, and the pile foundation should not be less than 1 18, and the pile length should not be calculated.

The depth and length of the foundation are determined by factors such as the height of the actual house, the structure of the house, the quality of the soil and the climate. If the house has a high number of floors and deep rock formations, the foundation must be laid very deep. If the house is low and the rock formation is shallow, the foundation can be relatively shallow.

Precautions for laying the foundation:In order to make the building safe and normal use without being damaged, the foundation is required to be not damaged under the load. The deformation of the soil layer that makes up the foundation due to expansion and contraction, compression, frost heave, collapsibility and other reasons should not be too large.

Therefore, when carrying out foundation design, it is necessary to consider:

1. The pressure per unit area of the bottom surface of the foundation is less than the allowable bearing capacity of the foundation.

2. The settlement value of the building is less than the allowable deformation value.

3. There is no danger of sliding the foundation.

The above content refers to Encyclopedia - Foundation.

The structure of the two-story building is simple and the load is small, and the owner does not need to talk about the answer to pile foundation piles, raft foundations, box foundations, etc.

However, without geological and hydrological data, it is impossible to be sure.

For example, if the main stratum of the building is rock, you only need to open a shallow groove; If it is pebble soil or solid old soil, you only need to dig through the depth of frozen soil to facilitate the depth of burying drainage pipes; But if it's silt and weak soil, you don't know how deep to dig in! Don't use piles at every turn, if you don't have to, it's a big waste. Therefore, it is necessary to understand the nature and condition of the soil layer in order to ensure safety and avoid wasting manpower and financial resources.

The depth of the foundation is related to the weight of the house and the soil quality of the foundation. The higher the house, the greater the weight and the higher the bearing capacity of the foundation soil is required, and in general, the lower the soil, the higher the bearing capacity and the deeper the foundation will be dug. However, it is not accurate to say that the depth of the foundation is directly proportional to the number of layers of cover.

There are many layers of different layers of soil foundation in the place where the building is built, and its formation age and bearing capacity are different, the bearing capacity of the rock layer is the highest, and the sand and stone layer is the highest.

If you want to build a 15-storey house, you must first roughly calculate the weight of the unit area of the house, and then ask a qualified geological exploration company to carry out exploration, and give the depth of the holding layer.

Thank you for the amount of help.

Look at what is used to make the foundation brick concrete 2 meters concrete concrete meters.

How deep is it, how deep is it, and the second floor is said to be on the second floor or the second floor below.

Summary. When designing the foundation, it is necessary to consider: The pressure per unit area of the bottom surface of the foundation is less than the allowable bearing capacity of the foundation.

The settlement value of the building is less than the allowable deformation value. There is no danger of slipping the foundation. Due to the different sizes of the buildings, the requirements for the strength of the foundation are also different, and the foundation design must consider the requirements of three aspects from the actual situation.

Sometimes only one aspect needs to be considered, and sometimes two or three of them need to be considered. If the above requirements are not met, it is necessary to make corresponding modifications to the foundation design scheme or carry out foundation treatment (physical or chemical technical treatment is adopted for the soil layer in the foundation, such as surface compaction, soil pile compaction, vibration, preloading, chemical reinforcement and in-situ mixing pile, etc.), so as to improve its structural properties and meet the requirements of the building for foundation design.

How deep should I dig the foundation of a 100-storey building?

Hello dear and happy to answer for you. The foundation of the 100-story building needs to be dug 12 meters. The depth of the foundation depends on the depth of the rock layer, and the high-rise building only needs to build the ground on the rock layer, which is generally not less than 1 15 meters of the height of the outer layer, almost about 12 meters.

The above is all the answers of the answer, I hope it can help you, and I wish you a happy life

It's by the sea in Shanghai.

The seaside should be dug deeper. If it is 100 meters of construction, the foundation of the foundation by the sea is at least 18 meters.

Not less than 1 15 meters of the height of the outer layer is fine, 15 to 18 meters is enough.

When designing the foundation, it is necessary to consider: The pressure per unit area of the bottom surface of the foundation is less than the allowable bearing capacity of the foundation. The settlement value of the building is less than the allowable deformation value.

There is no danger of slipping the foundation. Due to the different sizes of the buildings, the requirements for the strength of the foundation are also different, and the foundation design must consider the requirements of three aspects from the actual situation. Sometimes only one aspect needs to be considered, and sometimes two or three of them need to be considered.

If the above requirements are not met, it is necessary to make corresponding modifications to the foundation design scheme or carry out foundation treatment (physical or chemical technical treatment is adopted for the soil layer in the foundation, such as surface compaction, soil pile compaction, vibration, preloading, chemical reinforcement and in-situ mixing pile, etc.), so as to improve its structural properties and meet the requirements of the building for foundation design.

A pillar that is 7 meters long and 5 meters wide.

Hello dear and happy to answer for you. 7 meters long and 5 meters wide require 500x500mm (or 600x600mm) reinforced concrete columns.

7 meters long and 5 meters wide, then at least 500 500 mm (or 600 600 mm) reinforced concrete columns should be used.

Building a house in the countryside has become a very common phenomenon, but building a house is not an easy task, first of all, the foundation must be laid, only the foundation is firmly laid, and the construction of the house will save a lot of trouble, and the residence is safer and more secure. The depth and width of the foundation are also particular, so how deep is the foundation of a three-story building? Let's take a look.

The foundation of the three-story building should be dug below the old soil layer, and the overall bottom two shall not be less than 50cm; If conditions permit, dig as deep as possible, shallow foundation is not too firm, and it is not safe to live; In addition, if you choose a strip foundation, the width of the foundation of a three-story building in rural areas should not be less than 1 meter, and it is best to take rice; The burial depth must first reach the old soil layer, and it should be in the permafrost layer.

How to build the foundation of a three-story house in a rural area?

1. Explore the topography, geology and topography of the homestead.

For the construction of houses in rural areas, there are generally no survey tools, and the terrain is mainly surveyed by one's own naked eyes and the experience of living in the village for many years, in fact, the topography and geology of this terrain is an important basis for you to decide how deep the foundation of the house you build.

2. Dig a foundation trench.

Generally speaking, when digging a foundation trench, it is necessary to determine the geographical situation observed in your first step, but for a three-story building, you can dig a foundation of about 1.8 meters, which is completely enough to support your house.

3. Establish a foundation of cement reinforced concrete.

Once the trench has been dug, it's time to use solid rebar as the foundation for your house. The length and width of the reinforced concrete foundation, it also has certain regulations, especially the four corners and the middle place need to increase its area, to carry out the distribution of large forces. The exact situation depends on the size of the house you build yourself and a number of other factors.

Trembling band. Summary: Well, the above is about the introduction of the appropriate content of the three-story foundation, I hope to provide you with some help, I believe that in the future in the process of understanding the depth of the three-story foundation, friends will be more handy, get their own satisfactory answers.

The depth of the foundation is independent of the floor and should be calculated according to the bearing capacity of the foundation s c.

When the bearing capacity of the foundation is calculated to determine the area and depth of the foundation or the number of piles is determined according to the bearing capacity of a single pile, the load effect from the transmission of the load to the bottom surface of the foundation or cushion cap should be combined according to the normal service limit state, and the corresponding resistance limit adopts the modified characteristic value of the bearing capacity of the foundation or the characteristic value of the bearing capacity of the single pile.

i.e. s c, c is the limit of resistance or deformation; PK FA (wide tung foundation); QK RA (pile foundation). In this case, the eigenvalues fa and ra are the design values of resistance in the serviceability limit state.