Rigid drainage pile and construction method thereof

Abstract

The invention discloses a rigid drainage pile and a construction method thereof. A precast watertight concrete tube and a precast water permeating concrete tube are respectively provided with a vertical first through hole and a vertical second through hole, wherein the first through hole and the second through hole are hermetically communicated; and the second through holes on adjacent precast water permeating concrete tubes are hermetically communicated with each other. As the second through holes on the water permeating concrete tube can filter underground water, form a vertical draining channel for pore water in a soil layer, can quickly scatter pressure of the pore water rapidly increased in the soil layer to lead the ground to be hard to be upheaved; the rigid drainage pile forms negative pressure through a vacuum pump and a suction pipe to pump underground water and generate vacuum, can quickly and forcibly reduce water content of the soft soil layer among piles and form effective stress in the stratum so as to form prepressing on the foundation and improve the strength of foundation soil; when the water content of the soil layer is reduced to be suitable for tamping, a pounder is used for tamping the ground surface to ensure that the soil layer of the foundation can be quickly consolidated, and the strength is quickly improved. The consolidated composite foundation has higher bearing capacity, but the cost for treating the foundation is lower.

Description

technical field [0001] The invention relates to a foundation reinforcing pile body and a construction method, in particular to a rigid drainage pile and a construction method. Background technique [0002] Rigid pile composite foundation has been applied for more than ten years (see "CFG pile method" in "Technical Specifications for Building Foundation Treatment" JGJ79-2002), it has long effective pile length, small deformation, and can fully mobilize the soil between piles and piles. The bearing capacity of the end soil, the bearing capacity of the composite foundation is high, and there are many advantages such as lower cost than the pile foundation, so it has been widely used. However, the rigid pile composite foundation has rapid deformation in the deep soft soil layer; most of the rigid piles are low-grade immersed pipe pouring or pressure pouring concrete piles, and construction in the soft soil layer is likely to cause a sudden increase in the pore water pressure in t...

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Problems solved by technology

However, the rigid pile composite foundation has rapid deformation in the deep soft soil layer; most of the rigid piles are low-grade immersed pipe pouring or pressure pouring cast-in-place concrete piles, and construction in the soft soil layer will easily cause the pore water pressure in the soil layer to increase suddenly and cause ground damage. The pile will be pulled out due to uplift, and the concrete of the pile body is prone to shrinkage and segregation. The installation of rigid piles not only has no improvement effect on the soft soil layer around the pile, but has a disturbing effect to reduce the side resistance of the pile and other defects. Therefore, in the soft soil foundation Less used

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