Deep foundation pit super pressure suction combined vacuum dewatering system and construction method thereof

Abstract

The invention relates to a deep foundation pit super pressure suction combined vacuum dewatering system, and relates to the technical field of vacuum dewatering systems. The deep foundation pit super pressure suction combined vacuum dewatering system comprises a filter pipe, wherein a plurality of filter holes are formed in the filter pipe; a water pumping mechanism is arranged in the filter pipe; the water pumping mechanism comprises a water pumping pipe and a submersible pump; a connecting mechanism is arranged at one end of the filter pipe, and the other end of the filter pipe is coaxially connected with a sealing pipe; a sealing cover is connected to the sealing pipe through a flange; the water pumping pipe penetrates through the sealing cover; the connecting mechanism comprises a bottom frame, a plurality of connecting pieces and a mounting base; the bottom frame is connected to the end part of the filter pipe; the connecting pieces are arranged at equal intervals along the circumference of the bottom frame; the mounting base is used for being connected with the submersible pump; and the connecting pieces are used for being clamped with the mounting base. The deep foundation pit super pressure suction combined vacuum dewatering system has the effect of reducing the probability of breakage of the water pumping pipe caused by vibration of the submersible pump.

Description

technical field [0001] The present application relates to the technical field of vacuum dewatering systems, in particular to a super pressure-suction combined vacuum dewatering system for deep foundation pits and a construction method thereof. Background technique [0002] Before the excavation of the foundation pit, it is necessary to measure the groundwater level at the preset location of the foundation pit. When the groundwater level in the soil layer is higher than the preset bottom height of the foundation pit to be excavated, accidents such as groundwater leakage or loosening of the soil layer are likely to occur during the excavation process, and the groundwater level needs to be lowered. The foundation pit dewatering system is used to reduce the groundwater level in the soil layer where the foundation pit is to be dug, and is widely used. [0003] The relevant foundation pit dewatering system includes a filter pipe, which is a circular metal pipe with multiple filte...

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Problems solved by technology

[0004] The above-mentioned existing technical solutions have the following defects: the suction pipe plays the role of connecting the submersible pump, and there is a chance of vibration during the working process of the submersible pump. The suction pipe is subject to stress, which is prone to breakage or cracks, and then the submersible pump and pumping The water pipe disconnected and fell into the deep well, affecting the construction

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