How is the powder spraying pile constructed? The difference between powder spraying pile and jet spr

Powder spraying pile and jet grouting pile are both commonly used foundation treatment methods in civil engineering, and they have some differences in construction principles and applications.

1.Construction Principle:

Powder spraying pile: Powder spraying pile is formed by mixing cement, lime and other materials with water to form a slurry, and the slurry is injected into the ground through a high-pressure pump to form a vertical or inclined pile body. The slurry solidifies in the ground to form a solid pile body, which is used to increase the bearing capacity and stability of the foundation.

Jet grouting pile: The jet grouting pile is formed by squeezing the soil into the hole by rotating the spray of high-pressure water and cement slurry while drilling in the ground. The pile body of the jet grouting pile is mainly composed of soil and cement slurry, which is used to improve the compactness and bearing capacity of the soil.

2.Construction Method:

Powder spraying pile: The construction of powder spraying pile requires the use of special spraying equipment to inject slurry into the ground to form a pile body. It is usually necessary to pre-drill or excavate the pit and spray it in the hole.

Jet grouting pile: I regret that the construction of jet grouting pile requires the use of a rotary grouting drilling rig, which squeezes the soil into a pile body by rotating the drill pipe and spraying water and cement slurry at the same time. The construction of the jet grouting pile does not need to be drilled in advance and can be carried out directly on the ground.

3.Applications:

Powder spraying pile: Powder spraying pile is suitable for all kinds of soil layers, especially for soft soil layers, silt layers and aquifers. It can be used for foundation treatment, underground engineering reinforcement, slope reinforcement, etc.

Jet grouting pile: Rotary grouting pile is suitable for all kinds of soil layers, especially for squeezable soil layers such as sand, silt and clay. It can be used for foundation treatment, underground engineering reinforcement, wall retaining construction, etc.

It should be noted that powder spraying pile and jet grouting pile are both a kind of foundation treatment method, and the specific choice of which method needs to be evaluated and selected according to the specific situation of the project, soil conditions and design requirements.

What is the specific content of the basic requirements of cement powder spraying pile, the following Zhongda consultation will answer for you.

1.The cement should be high-quality ordinary Portland cement, and the amount of cement must meet the design specifications.

2.Before construction, the test pile should be driven first, and the construction parameters such as air pressure, gas volume, adjusted ash spraying amount, stirring speed, and lifting speed should be mastered, and mechanical properties such as shear strength and unconfined compressive strength should be tested on the core sampling of the pile to verify whether it meets the design requirements.

3.Before starting, it should be debugged to check the operation of the pile driver and the smooth flow of the conveying pipe.

4.In order to ensure the verticality of the pile, the installation of the imitation demolition frame should be stable, and the main shaft of the drilling rig should be vertical.

5.When the forward rotating drill bit is pre-stirred and sinks to the design depth in the order of step-by-step acceleration in gears and drills to close to the design depth, it should be drilled slowly at low speed and drilled in situ for 1 2minIn order to keep the air supply channel in the middle of the drill pipe dry, compressed air should be continuously conveyed in the drill pipe from the pre-stirring sinking until the powder spraying.

6.When it is confirmed that the reinforcing material has been sprayed to the bottom of the hole, it can be reversed and lifted, and the lifting speed is that when it is lifted to the design ash stop elevation, it should be stirred slowly in situ for 1 2min

7.In order to ensure that the pile body is stirred evenly, the mixing head must be lowered to the design depth again. When lifting and stirring, its speed is controlled to the left and right.

8.The powder sending and lifting equipment must have an automatic metering device. In the process of powder spraying and stirring, we should pay attention to the operation of the powder sprayer and air compressor and the display of the pressure gauge at any time, and observe the vibration of the powder feeding hose.

If an abnormal situation is found, the pressure rises continuously or suddenly drops, the lifting should be stopped, stirred in situ, the cause of Yu Jingming should be investigated, and the fault should be eliminated. The air pressure in the ash tank is higher than that in the pipe when spraying to ensure normal powder feeding. During the construction process, the piping system is required to be kept dry, and the stagnant water in the gas-water separator is frequently removed to prevent moisture from entering the drill pipe and blocking the powder feeding pipeline.

9.During construction, the construction parameters of each pile should be recorded truthfully and accurately.

Hello, I am glad to answer for you, the powder spraying pile is not the same kind of pellet pile, the trapped Xiang powder spraying pile and the pellet pile are both types of pile foundations used in civil engineering, but Wang Bo they are not the same kind of pile. The construction methods, working principles and applicable occasions of powder spraying piles and pellet piles are different. Powder spraying pile is the use of high-pressure air to spray cement powder or other suitable solid particles into the ground to form a certain diameter and depth of spike pile.

Powder spraying pile is mainly used in soft soil foundation reinforcement, retaining structure, anti-soil retaining wall and other projects, with the advantages of convenient construction and high efficiency. Pellet pile is a pile body with a certain diameter and depth by using a drilling rig to drill holes in the ground and inject suitable granular materials. Pellet piles are suitable for all kinds of foundation treatment projects, such as reinforcing soft soil and sandy soil foundations, short piles with deep burial depth, etc.

The advantages of pellet pile are convenient construction, high efficiency, and wide range of application. Therefore, although powder sprayed piles and pellet piles are both types of pile foundations, their construction principles and scope of application are different and cannot be confused. Hope it can help you and have a happy life!