Concrete piles are made of concrete (including ordinary reinforced concrete and prestressed concrete). With the advantages of saving wood and steel, durability, low cost, etc., it has been widely used in the foundation engineering of hydraulic buildings, industrial buildings, civil buildings and bridges, as well as the anti sliding or water separation of slope and foundation pit support.
The cross sections of piles are square, rectangular, circular and annular. Square section piles and annular section piles are commonly used. The side length of the square section pile and the outer diameter of the circular section pile are 20-60 cm. The length of the pile can reach 40 meters, with a pile cap at the upper end and a pile tip at the lower end. The fabrication process of concrete piles is basically the same as that of concrete poles.
Classification According to bearing characteristics
1. Friction pile
1) Friction pile - most of the load is borne by the friction force of the soil around the pile, while the pile tip resistance can be ignored
2) End bearing friction pile - pile whose load is mainly borne by pile shaft friction
2. End bearing pile
1) End bearing pile - most of the load is borne by the pile tip bearing force, while the pile side resistance can be ignored
2) Friction end bearing pile - pile whose load is mainly borne by pile end resistance
Classification by construction method
1. Steel pile
2. Stake
3. Precast concrete pile
4. Cast in place pile: pipe sinking cast-in-place pile, bored cast-in-place pile
5. Digging pile: manual digging pile, mechanical digging pile
Classification by setting effect
1. Non squeezing pile: such as bored (punching or digging) cast-in-place pile and prefabricated pile driven after drilling, since the soil in the hole is removed during the setting process, the soil around the pile will not be squeezed and may move into the pile hole, reducing the shear strength of the soil and reducing the pile side friction. Non squeezing soil is generally cast in situ, including manual hole digging pile, punching (drilling) cast-in-place pile, etc. Manual hole digging pile, with reinforcement, is a reinforced concrete pile that is manually excavated and poured on site. The diameter of manual hole digging pile is generally thicker, and the diameter of the thin pile is more than 800 mm. It can bear the main structure with less floors and greater pressure, and is widely used. The pile cap is set above the pile, and then the pile cap beam is tied and connected to make the force of each pile evenly distributed to support the whole building.
2. Partial compaction pile: impact bored cast-in-place pile, H-shaped steel pile, open steel pipe pile and open prestressed concrete pipe pile. In the process of pile setting, the soil around the pile is slightly squeezed, but the strength, load and deformation properties of the soil change little.
3. Soil squeezing pile: solid precast pile, pipe pile with closed lower end, wood pile and cast-in-place pile with immersed pipe must crowd out a large amount of soil at the pile location during hammering and vibration penetration, which will seriously disturb and destroy the soil structure and have a great impact on the strength and deformation properties of the soil. Soil squeezing includes cast-in-place pipe sinking piles (cast-in-place, pipe sinking methods include static pressure, vibration, hammering, etc.), precast piles (ordinary reinforced concrete, prestressed concrete).
Pinghu Huafeng Cement Products Factory is a large enterprise engaged in cement products for a long time Cement brick The manufacturer specializes in producing cement pipes, U-grooves, square piles, cement piles, road bricks Cement grass planting brick 、 Cement tile Concrete square piles, solid square piles, cement sewer pipes, concrete cement pipes, curbstones, curbstones, and other cement products, welcome new and old customers to consult and negotiate! //www.jxhfslzp.com Service hotline: 130-9562-2833 (Manager Yu)
