Draining and recharging device for weathered rock fissure water and construction method thereof

Abstract

The invention discloses a draining and recharging device for weathered rock fissure water and a construction method thereof, and belongs to the field of deep foundation pit underground water treatment technology construction. The draining and recharging device comprises a foundation pit, weathered rock is arranged in the foundation pit, a mounting cavity is formed in the weathered rock, a water collecting tank is mounted in the mounting cavity, a floating ball piece is mounted in the water collecting tank, a vacuum pump and a water suction pump are mounted on the water collecting tank, and the vacuum pump and the water suction pump both communicate with the water collecting tank; the vacuum pump is suitable for pumping fissure water in the weathered rock into the water collecting tank, a drainage ditch is formed between the water collecting tank and the inner wall of the foundation pit, and the water suction pump is suitable for communicating the drainage ditch with the water collecting tank through a water pipe.According to the draining and recharging device for the weathered rock fissure water and the construction method thereof, the technical problems that when the foundation pit is arranged on a weathered rock stratum in a coastal area, the foundation pit is prone to deformation, a supporting structure is unstable, pit bottom inrush occurs, and the fissure water in the weathered rock needs to be pumped out are solved, the structure is simple, the cost is low, manual operation is greatly reduced, and the draining and recharging effects are good.

Description

technical field [0001] The invention belongs to the field of building waterproofing, and in particular relates to a device for pumping and recharging fissure water in weathered rocks and a construction method thereof. Background technique [0002] In many coastal Jiangsu and Zhejiang regions of my country, the groundwater level is relatively high, and it is inevitable to draw down the groundwater during the construction of the foundation pit. These areas often have complex hydrogeological distribution, especially in areas with sandy layers and weathered rock foundations, where there may be underconsolidated soil in some layers, and precipitation in foundation pits can easily cause compression deformation of the strata. When designing the dewatering and dewatering of the foundation pit, we must carefully consider it. Because the dewatering effect of the foundation pit and the control of groundwater will directly affect the construction and safety of the foundation pit, which...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: setting foundation pits in the weathered rock formations in the coastal areas will easily lead to deformation of the foundation pits and instability of the support structure, resulting in surges at the bottom of the pits, and it is necessary to pump out the fissure water in the weathered rocks

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