Concrete foundation slab restoring method for preformed water collecting well for higher underground hydraulic pressure

Abstract

The invention discloses a concrete foundation slab restoring method for a preformed water collecting well for higher underground hydraulic pressure, and relates to the technical field of building construction. The method comprises the following construction steps: (1) fabricating a water lowering pipe, wherein the lower section of the water lowering pipe is coated with a filter screen and a bottom filter screen is arranged at the bottom end of the water lowering pipe; (2) placing the water lowering pipe into the water collecting well, placing a water pumping pipe into the water lowering pipe for water pumping, pumping out the water lowering pipe filled with underground water, and performing flash set concrete pouring to the foundation slab in the water collecting well except the water lowering pipe, and performing continuous water lowering during pouring; (3) when the poured concrete achieves certain strength, stopping water lowering, withdrawing the water pumping pipe of the pump, and plugging the water lowering pipe by adopting a concrete cylinder, a coarse sand packing layer and a rubber water-seal piston from up to down; (4) performing flash set concrete pouring to the upper section of the rubber water-seal piston in the water lowering pipe. During concrete foundation slab restoring process for the preformed water collecting well, the method can efficiently solve the problems of construction difficulty and incapability of ensuring the restoring quality caused by over high underground hydraulic pressure.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a method for restoring a concrete foundation floor at a reserved water collection well. Background technique [0002] In the construction of high-rise buildings, when the groundwater pressure is high, it is necessary to leave a water collection well on the foundation floor, and set a downwater pipe in the well, put the water pump suction pipe into the downwater pipe for pumping, and reduce the groundwater level through centralized pumping. Purpose. [0003] When the dewatering equipment needs to be removed after the foundation construction is completed, the water collection well should be treated and the wellhead foundation floor of the water collection well should be restored. The general recovery method is: after the precipitation stops, the downwater pipe is pulled out, gravel is buried in the collection well (including the location of the original downwater pip...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for restoring the concrete foundation floor at the reserved water collection well with relatively high groundwater pressure, which effectively solves the problems caused by excessive groundwater pressure during the restoration process of the foundation floor at the reserved water collection well with relatively high groundwater pressure. Difficulties in construction and restoration quality cannot be guaranteed

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