A method for treating precipitation in waterproof construction of underground building pit body

Abstract

The invention discloses an underground building pit body waterproof construction precipitation treating method and relates to the field of underground building waterproofness. The method includes the following steps that a, a precipitation pit is formed in the shaft bottom of a pit body, and a water suction pump is arranged in the precipitation pit; b, a cover plate is arranged on the precipitation pit, a sleeve or hole is reserved in the center of the cover plate, and a cable of the water suction pump and a drain pipe penetrate out of the sleeve or hole; a waterproof layer at the bottom of the pit body is laid on a closing opening around the sleeve or hole; c, before the underground building pit body is poured, the cover plate and the water suction pump are removed; d, graded sand and stone are laid in the precipitation pit; e, concrete is poured into the precipitation pit to the plane of the shaft bottom of the pit body; f, a waterproof layer on the top of the precipitation pit is laid and is in lap joint with the waterproof layer at the bottom of the pit body; g, the pit body structure concrete is poured. The problems that in the prior art, accumulated water in a pit body cannot be completely reduced at a construction site, and therefore waterproof layers cannot be constructed on the basal plane at the bottom of the pit body are solved effectively.

Description

technical field [0001] The invention relates to an underground building waterproofing technology, in particular to a method for treating precipitation in underground building pit body waterproofing construction. Background technique [0002] Foundation pit dewatering has always been the focus of underground engineering construction. There are many methods of foundation pit dewatering, including open ditch plus water collection well dewatering, light well point dewatering, etc., but the above dewatering methods are not enough to completely eliminate water collection wells, elevator shafts, bearings, etc. The internal water accumulation of structures below the cushion level such as platform foundation wells, and due to uncontrollable site conditions, basement surface water tends to accumulate in low places. Affected by stagnant water, the conditions of the base layer of waterproof construction cannot meet the requirements of the base layer with no clear water to ensure the con...

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Problems solved by technology

Affected by stagnant water, the conditions of the base layer of waterproof construction cannot meet the requirements of the base layer with no clear water to ensure the construction quality of the waterproof layer. It may be that the humidity of the base layer is too high (or even clear water) to cause the waterproof coating layer to fail to form a film, and the lap joint of the waterproof coil is not reliable At the same time, the accumulation of water causes segregation, poor compactness, and thickness of the protective layer of steel bars to fail to meet the design requirements in the structural concrete of the water collection well, elevator shaft, and platform foundation well during pouring, resulting in corrosion of steel bars and carbonization of concrete. Threat structure security

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