Construction device and construction method for tube pile in dense sand stratum

Abstract

The invention relates to a construction device and a construction method for a tube pile in a dense sand stratum. The construction device for the tube pile in the dense sand stratum comprises a firstclay layer, a sand soil layer and a second clay layer, wherein a construction platform is arranged above the first clay layer; a static pile press machine is arranged at the upper end of the construction platform and is linked with the tube pile; a water tank is placed at the upper end of the first clay layer; a water pump is fixedly connected to the outer side of the water tank and communicates with a water delivery pipe; and a water jet pipe communicates to one end, far away from the water tank, of the water delivery pipe. According to the construction device and the construction method forthe tube pile in the dense sand stratum provided by the invention, during construction, the tube pile and the static pile press machine are fixed, the static pile press machine is started, and when the static pile press machine is linked with the tube pile and the lower end of the tube pile is located at the upper end of the sand soil layer, the water jet pipe is placed in a cavity of the tube pile, the water pump is started so as to be linked with the water delivery pipe, the water jet pipe starts to spray water in the sand soil layer, the sand soil layer can be liquefied after the water content in the sand soil layer is increased, and the resistance during pile sinking can be reduced and even disappeared, so that the tube pile can be ensured to be smoothly sunk in the sand soil layer.

Description

technical field [0001] The invention relates to the technical field of building pile foundation construction, in particular to construction equipment and a construction method for pipe piles in dense sand layers. Background technique [0002] Prefabricated pipe piles are widely used in the pile foundation of high-rise buildings. At present, the construction of pipe piles generally adopts the static pressure method, that is, the weight of the pile machine itself and the counterweight are used to overcome the resistance of pile sinking so that the pipe piles sink into the design elevation. [0003] The resistance of pipe pile sinking is the sum of pile side resistance and pile end resistance. When constructing pipe piles in sandy soil layer, the pile sinking resistance is mainly produced by pile end resistance, especially when there is a relatively dense sandy soil layer. , the resistance at the pile tip increases sharply, the pipe pile cannot continue to sink, and it is prone...

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Problems solved by technology

(Introduction hole construction: that is, at the pile position, use a long auger drill pipe with a diameter 50-100mm smaller than the pile diameter to drill into the soil layer, and then extract the drilled loose soil layer to form a borehole, and then the static pressure pile machine is used in the introduction hole. The disadvantages of hole construction: 1. Generally, the sand layer is an aquifer. When the hole is led in the sand la

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