Pile sinking device and pile sinking method for prestressed centrifugal pipe piles by hydraulic method in middle excavation

Abstract

The invention discloses a pile sinking device for a middle digging hydraulic method pre-stressed centrifugal pipe pile (square pile). The pile sinking device comprises a main machine, a windlass, a bracket, a reaction frame, a power head, a soil sampling tank and a steel wire rope, wherein the windlass and the bracket are arranged on the main machine; the reaction frame, the soil sampling tank and the steel wire rope are arranged on the bracket; the power head is arranged inside the bracket; the lower side of the power head is connected with a soil sampling drilling rod; and the soil sampling drilling rod passes through the soil sampling tank, a piston rod and the centrifugal pipe pile (square pile) to the bottom of the device. The invention further provides a pile sinking method for the middle digging hydraulic method pre-stressed centrifugal pipe pile (square pile). The method comprises the following steps of: moving the main machine to a pile pressing position; making the main machine project into an inner tongue hole of the reaction frame through a tongue on the soil sampling tank; extending the piston rod to realize pile pressing; pressing the pile repeatedly, and separating the power head from the soil sampling drilling rod; connecting a second centrifugal pipe pile (square pile); and performing the steps once again. The pile sinking device has the advantages of safety, reliability, low cost, high efficiency, no noise, no pollution, no soil compression, no slurry, environmental friendliness and the like.

Description

technical field [0001] The invention relates to a mid-digging hydraulic prestressed centrifugal pipe pile sinking device and a pile sinking method, which are mainly used in civil and industrial infrastructure construction. The pipe pile supports the load of buildings and various large-scale equipment foundations, making the building Objects 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 piles mostly adopt hammering method and static pressure pile method, followed by drilling and taking soil 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, which is a highly ...

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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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