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Introduction to Static Pressure Pile Planting Machine

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.

Principle of static pressure pile planting machine
By clamping several piles that have already been pressed into the ground (completed piles) and using their pull-out resistance as a reaction force, the next pile is pressed into the ground using static load.

The Five Principles of Construction
Any construction project must start from the perspective of the public and achieve the basic principles of environmental protection, safety, speed, economy, and culture, forming a mutually coordinated and harmonious relationship. The pressing method strictly follows this principle under any construction conditions.

    Pressing method
    The most appropriate pressing method is usually selected 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 gravel, pebbles, or rock layers to reduce penetration resistance while drilling with a spiral drill, thereby achieving compaction operations. The "spiral drilling device" linked to the main body of the static pressure pile planting machine minimizes the drilling of the formation directly below the front end of the pile, while suppressing the occurrence of pressing into the ball root and penetrating the pile into the ground. Due to the small amount of soil discharged, it will not damage the surrounding strata and can quickly construct completed piles with strong support. This construction method can be applied to soft rocks such as mudstone, sandstone, granite, etc.

    Applicable scenarios

    Classified by project scope: Water cofferdam, urban pipe gallery construction, unsupported water surface construction, embankment protection, river deepening, road retaining walls, foundation pit support, water stop walls, construction in narrow spaces, ultra-low altitude operations, bridge pier reinforcement Classified by geological conditions: Based on the Standard Penetration Test (SPT). Steel sheet piles can be penetrated into hard strata with a converted N value below 500. Geology with N values above 500 also have construction achievements. Geological (construction) conditions such as isolated rocks, rock layers, and concrete can all correspond. Classified by pile material model: Larsen steel sheet piles (hot-rolled&cold-formed), Z-shaped steel sheet piles, cap shaped steel sheet piles (900mm), ultra close contact steel sheet piles (Zero Pile 600mm), steel pipe sheet piles, steel pipe piles, H-shaped steel sheet piles, concrete piles, PC walls, straight web steel sheet piles, etc.

    Rigorousness Pragmatism Innovation ——
    Dedicated to developing the self-propelled
    "static pressure pile driver"

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