Pressing method The most appropriate pressing method is usually ed based on geological conditions. For weak strata with a standard penetration test N value below 25, static load pressing can be used, that is, the "individual pressing method"; When the N value exceeds 25, use high-pressure water jet assisted pressing method or spiral drill assisted pressing method. Individual pressing method Equipment used: static pressure pile planting machine+power unit This construction method is suitable for soft formations with N values below 25. The pile material is separately pressed into the ground using the static load through the driving force of the static pressure pile planting machine. Water jet assisted pressing method Equipment used: static pressure pile planting machine+power unit+water knife tube drum+high-pressure water pump This construction method is suitable for harder formations with N values above 25. By spraying high-pressure water into the formation at the front end of the pile, the water pressure in the gaps between soil particles instantly increases, making it easier for soil particles to move and reducing the resistance at the pile end. At the same time, it can reduce the peripheral friction resistance and lock mouth resistance of the pile, and use a smaller pressing force for pressing. It can also prevent damage to the pile material. The amount of water sprayed can be adjusted according to the construction conditions to minimize the impact on the formation and achieve efficient pressure construction. Auger assisted pressing method Equipment used: static pressure pile planting machine+power unit+spiral drilling device This construction method utilizes the unique "core removal theory" created by the technical research institute in hard formations such as

Static pressure pile planting machine is a new environmentally friendly pile foundation construction equipment. The vibration, noise, and pollution caused by pile foundation construction in human infrastructure engineering have attracted attention from all sectors of society. Static pressure pile driver is a hydraulic pile driver that meets social needs without vibration and noise. It can be applied to various geological and environmental conditions and has been widely used around the world. Currently, pile materials available for construction include U-shaped Larsen steel sheet piles, Z-shaped steel sheet piles, steel pipe piles, concrete piles, etc. Can correspond to geological conditions, standard penetration test [1] for pebble layers and rock layers with N values of 0-500.

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