Middle-stirring inverse-pulling method based pre-stressed centrifugal tubular pile sinking device, and pile sinking method

Abstract

The invention discloses a middle-stirring inverse-pulling method based pre-stressed centrifugal tubular pile sinking device, comprising a host machine, and a winch, a power unit, a plurality of pulleys, a steel wire rope and an excavating rod which are arranged on the host machine, wherein the power unit is arranged on the host machine; one pulley is arranged at the upper end of the power unit, the lower end of the power unit is connected with the excavating rod; the lower end of the power unit is connected with a pile cap; both sides of the lower end of the pile cap are respectively with the pulleys; the lower end of the pile cap is provided with a centrifugal tubular pile; the excavating rod runs through the centrifugal tubular pile and reaches the bottom of the device; and the lower end of the excavating rod is provided with an expanding unit. The invention further provides a middle-stirring inverse-pulling method based pre-stressed centrifugal tubular pile sinking method, comprising the following steps of: stirring and loosening a bottom soil layer by the expanding unit at the lower end of the excavating rod and then downwards and reversely pulling the centrifugal tubular pile by the steel wire rope so as to compress the centrifugal tubular pile on the loosening soil layer and reduce the resistance of the soil layer, so as to sink the pile. The device and method have the following characteristics of safety, reliability, low cost, high benefit, no noise, no pollution, no extruded soil, no mud, environment friendliness and the like.

Description

technical field [0001] The invention relates to a prestressed centrifugal pipe pile sinking device and a pile sinking method of the middle-stirring and reverse-pull method. It is mainly used in civil and industrial infrastructure construction. The pipe pile supports the load of buildings and various large-scale equipment foundations. Buildings and structures are built higher, so the depth of the pile driven into the soil and the diameter of the pile directly affect the bearing capacity of the pile. Background technique [0002] The pile sinking device and the pile sinking method of existing prestressed centrifugal pipe pile (square pile) are mostly to adopt hammering method and static pressure pile method, followed by drilling soil and pressing method and bored pile method. 1. Hammering method: When the diameter of the pile is large and there are no residents around, the hammering method can be used, but there is a lot of noise, black smoke and vibration during hammering, wh...

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Problems solved by technology

3. Drilling and soil pressing method: that is, first use soil extraction equipment to make a hole on the original floor, and then press the pile into the hole. This method can be used in the northern region, because the water content in the soil is less, and the hole It can be formed, but in the Yangtze River Delta region in the south, the water content in the soil is high, the pilot hole cannot be formed, and the pile cannot be driven (pressed) in, and the pile is also prone to misalignment

When the piles are long, it is difficult to carry out drilling and soil extraction. At present, the deepest soil extraction can only reach about 30 meters; 4. Another pile foundation is the bored pile method: this method is to drill a hole on the ground with the pile driver , and then pouring reinforced concrete in the hole to form a pile method has the advantages of high cost, long construction period, and difficult quality assurance, and a large amount of mud is produced in the bored pile. It is difficult to dispose of the mud, and a large amount of mud is disposed of in rivers and lakes. , in the sea, in the sewers, large and small rivers, and sewers are blocked by mud. The government spends a lot to clean up the sewers and river mud every year, causing great pollution. , High-speed rail foundation piles, that is, when the bearing capacity is large, only the bored pile method can be used without compacting the soil

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