Arrange the pile foundation steel to make the pile foundation structure more solid. At the same time, it is possible to save a considerable amount of money when you do not have to buy more iron and steel materials to meet the requirements of a specific project.
What is a pile foundation?
The foundation is a part that helps to increase the stability and solidity of the gong. The size and construction process of this part requires very high precision. The foundation and the pile cap are known to be two very necessary parts. If one of these two parts is made wrong, the quality of the work will not be guaranteed.
The foundation tower is the part that connects the piles of the construction work with the correct technique and ensures certainty. The construction worker needs to build the foundation to distribute the load from the top to the bottom so that it is the most uniform. This will prevent future crashes.
Depending on the purpose of using the structure as well as the construction area, the foundation has many different shapes. May be triangular, rectangular, round, or conical. As long as it matches the pile, the durability of the foundation will be effectively promoted. It has the effect of evenly distributing the force from the whole building to the bottom. The connection between the foundation calyx is inseparable.
Dimensions of the nail plate
The length from the center of the foundation column to the edge of the platform must be greater than the diameter of the column or the average side length of the pile. The distance from the pile to the edge of the platform must be more than 150mm
The width of the bottom plate of the single-row, double-row pile foundation is more than twice the length of the side of the pile. The width of the foundation must also be equal to or more than 600mm .
The standard pile foundation with the length from the edge of the pile to the edge of the platform must be more than 150mm. The thickness of the pile foundation should be based on the requirements of the above structure to determine. This thickness will be calculated from the surface of the mattress, so it must be more than 300mm.
If the foundation calyx is tapered, the thickness of the edge of the base should not be less than 300mm.
The shape and size of the foundation calyx depends mainly on the area required to arrange the number of piles. At the same time, it must be based on the regulations on the minimum distance between the piles.
Based on geological conditions and structural characteristics of the work to calculate the long burial depth. For example, that building has a basement, storage, ...
To calculate the height of the base of the tower, it is necessary to have the necessary value to ensure the underground level of the piles in the tower.
Classification of nail stations
The foundation does not have a definite shape depending on the design of the building. Nail calyx is usually divided into 2 types, hard and soft. Besides, it can be classified according to different sizes. In order to choose the appropriate foundation, it is necessary to carefully calculate the strength of the construction. A way to find out the most effective way to build the foundation.
How to arrange steel structure for pile foundation to meet the requirements of standards of bearing capacity, be solid with an appropriate cost to meet the requirements from the executed construction drawings, to perform the requirements? following order:
Prepare surface
Geological survey is an extremely important first step that cannot be ignored. This step is carried out quite closely, so it helps the contractor to assess the construction environmental conditions. When a flat surface is prepared, the construction will be extremely convenient.
The types of piles used in the construction need to be carefully checked and selected. Unsatisfactory piles need to be removed and replaced with better piles.
Construction of concrete piles
Inspect the site to be constructed carefully. It must ensure that it meets all technical requirements as well as the safety of workers during construction. Determine where to press the pile.
Carefully check the construction machinery and equipment and install them according to the process and location of the design. The purpose is to ensure all the functions of the equipment and the safety of the people performing the construction.
Pile pressing process
Step 1: Survey the topography and geology to prepare the construction site. Then analyze and calculate the pile foundation for the most effective construction. Arrange the area to stack piles, replace the piles that do not meet the quality and technical requirements. Positioning and project foundation.
Step 2: Pressing concrete piles for the foundation of the house. Detail:
Pressing the first pile, crane erecting the vertical pile and pressing rack. Adjust the pile tip to the correct position as the design and adjust the vertical axis.
Connect and press the intermediate pile segments to the first pile. Then align the axis line so that it coincides with the first axis line and press.
After the last pile reaches the ground, the crane erects the pile core to capture the top of the pile. Continue pressing the pile to the same depth as the design. When pressing a pile, slide the press system on the base frame to the next pile pressing positions.
Step 3: Processing reinforcement includes: straightening, polishing, cutting, bending and joining reinforcement.
Step 4: Weld, tie the reinforcement into a mesh and create a frame.
Step 5: Pour concrete foundation for sure.
Regulations on errors
According to the regulations on error, the inclination of the pile should not exceed 1%. The high position of the bottom of the top of the pile head must have a certain error of over 75mm compared to the position of the design.
To work effectively, you need to keep a few things in mind:
The shape and size of the base of the calyx is highly dependent on the required area. It is necessary to comply with the regulations on spacing while arranging the number of piles in the foundation.
Burial depth depends on geological conditions. It is related to the structural features of the building such as adding a basement or swimming pool,...
The height of the radio depends on the calculation to decide. However, there must be the necessary value to ensure the clamping of the piles in the station.
If you want to hit the top of the pile to attach the reinforcement to the tower, you must consider the anchor length. Accordingly, for steel with burrs over 20cm and steel without burrs, it is over 30cm. When constructing roads or bridges, the distance from the edge of the platform to the edge of the outermost row of piles c ≥ 25cm. For civil works, c ≥ 10cm for civil works.
The distance from the center of the pile to the center of the pile near each other has L ≥ 3d for the friction pile. For poles, L ≥ 2d. Structural reinforcement can be used 12÷14 steel. At the same time, arrange it with a distance of 15÷25cm in both directions.
The foundation is an extremely important part to increase the durability of the construction. Therefore, you need to choose the most appropriate method of nail reinforcement.
