Pile sinking device and pile sinking method for prestressed centrifugal pipe piles with mid-digging reverse pull method

Abstract

The invention discloses a device for sinking a pre-stressed centrifugal pipe pile (square pile) with an in-pile boring and reverse drawing method. The device comprises a host, a winch, a power head, a soil taking box, a pulley and a wire rope, wherein the winch is arranged on the host; the power head is arranged on the host; the lower part of the power head is connected with a soil taking drill stem; the lower end of the soil taking box is connected with a pile cap; the lower end of the pile cap is provided with a centrifugal pipe pile (square pile); and the soil taking drill stem penetrates through the soil taking box and the centrifugal pipe pile (square pile) to reach the bottom of the device. The invention also provides a method for sinking the pre-stressed centrifugal pipe pile (square pile) with the in-pile boring and reverse drawing method; and the method comprises the following steps of: firstly, moving the host to a pile pressing position; taking soil through the soil taking drill stem; meanwhile, pressing the pile through the pile cap; recovering the soil through the soil taking box while taking soil; pressing into a first pile and then connecting a second pile; and continuously performing said steps. The device and the method have the advantages of safety, reliability, low cost, high benefit, no noise, no pollution, no extruded soil, no mud, environmental 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 a mid-digging anti-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, so that 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 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 po...

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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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