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Base pit dewatering and water saving device and construction method thereof

A technology of water-saving devices and construction methods, applied in protection devices, infrastructure engineering, excavation, etc., can solve problems such as waste of water resources, poor precipitation effect, etc., and achieve the effects of cost saving, good precipitation continuity, and shortened construction period

Inactive Publication Date: 2011-04-06
CSCEC CITY CONSTR DEV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a foundation pit dewatering and water saving device and its construction method, to solve the technical problems of serious waste of water resources and poor dewatering effect in the existing dewatering construction method

Method used

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  • Base pit dewatering and water saving device and construction method thereof
  • Base pit dewatering and water saving device and construction method thereof
  • Base pit dewatering and water saving device and construction method thereof

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Embodiment Construction

[0039] Examples see figure 1 , figure 2 As shown, in this foundation pit dewatering and water saving device, a well pit 17 (800mm deep, 600mm wide, and 60° slope) is dug downward in the middle of the foundation pit 16 of the floor structure, and 200mm thick sand and pebbles 6 are filled in the well pit. A 600mm high ￠300mm sand-free pipe 5 is placed vertically on the sand and pebbles, sand pebbles are filled between the surroundings of the sand-free pipe and the pit, the top of the sand-free pipe is higher than the top of the well pit, and the water pump 4 is placed in the sand-free pipe. The top surface of the well pit around the sand-free pipe 5 and the side wall of the foundation pit of the floor structure are poured with foundation cushion concrete 11, and the elevation of the top of the sand-free pipe 5 is flush with the elevation of the foundation cushion concrete; the downwater conduit 1 is pre-buried in the sand-free pipe 5. In the bottom plate of the foundation pit ...

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Abstract

The invention relates to a base pit dewatering and water saving device and a construction method thereof. The middle part of the base pit of a baseboard structure is provided with a well pit; the well pit is internally and vertically provided with a no-sand tube; pebbly sand is filled between the bottom and periphery of the no-sand tube; the top of the no-sand tube is higher than the top surface of the well pit; a water pump is arranged in the no-sand tube; blinding layer concrete is poured at the top surface of the well pit which is at the periphery of the no-sand tube and the side wall of the base pit of the baseboard structure; and the top elevation of the no-sand tube is flush with the elevation of a blinding layer; a dewatering conduit is pre-buried in a base pit baseboard right above the no-sand tube, a waterproof layer is paved on the blinding layer concrete, a layer of waterproof and protective concrete is poured on the waterproof layer, and the base pit baseboards are poured above the waterproof and protective concrete and at the periphery of the dewatering conduit. The method of the invention has lower investment, saved cost and less amount of dewatering amount, thereby reducing the loss of underground water and protecting water resource; and the method can be adopted for a project in which the well point dewatering method is not ideal for dewatering or a project in which the underground water is near the base pit elevation.

Description

technical field [0001] The invention relates to a device and a construction method for dewatering foundation pits in construction engineering. Background technique [0002] For a long time, most foundation pits use well point precipitation, which causes serious waste of water resources. In order to protect groundwater resources, the Beijing Municipal Party Committee issued the "Measures for the Management of Precipitation in Construction Projects in Beijing". The "measures" require all kinds of newly started projects to limit the construction precipitation, and the method of curtain water isolation should be adopted to isolate groundwater from entering the construction area. In addition, today's urban construction land is scarce, and the surrounding buildings are closely spaced. In order to ensure safety, most of them can only adopt the method of curtain water isolation. Therefore, the curtain water barrier will be the main method for future project precipitation construct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D19/20E02D19/16E02D17/02E02D31/02
Inventor 史凤莉赵福明姜旭张志军王学武俞锋刘扬王磊
Owner CSCEC CITY CONSTR DEV
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