Intubation negative pressure air jet deep well dewatering device

Abstract

The invention discloses a pipe-inserting negative pressure air jet deep-well dewatering device. The pipe-inserting negative pressure air jet deep-well dewatering device comprises a negative pressure system, a positive pressure system and a deep well structure, wherein the negative pressure system is provided with a vacuum sub water pipe; the positive pressure system is provided with a sub air pipe; the deep well structure consists of a sand well, a filter pipe and a clay wellhead; the sub air pipe of the positive pressure system penetrates through the connector of the vacuum sub water pipe of the negative pressure system and extends into the vacuum sub water pipe; the vacuum sub water pipe is connected with the filter pipe; and at least one connector is arranged on the vacuum sub water pipe. According to the pipe-inserting negative pressure air jet deep-well dewatering device disclosed by the invention, the deep well structure consisting of the sand well, the filter pipe and the clay wellhead is adopted, and a well pipe is omitted, so that the layered dewatering and excavating of a deep foundation pit are facilitated; normal operation of an excavator is not affected; and the pipe-inserting negative pressure air jet deep-well dewatering device has the advantages of high working efficiency, easy construction and good dewatering effect.

Description

technical field [0001] The invention relates to the technical field of foundation pit dewatering in civil engineering, and is used for dewatering with a depth greater than ten meters [0002] foundation pit, especially an intubated negative pressure air jet deep well dewatering device. Background technique [0003] Deep foundation pit excavation is an important construction procedure for modern large-scale underground structures. The lowering of the groundwater level in the foundation pit is also called groundwater control. The higher the groundwater level in the construction environment, the deeper the depth required for the foundation, and the more difficult the construction will be. [0004] In the prior art, the dewatering of the foundation pit is carried out by setting a dewatering well point in the foundation pit. First, a deep well is drilled, and a well pipe with the same length as the well depth is installed in the deep well, and gravel is filled between the inner ...

AI Technical Summary

Problems solved by technology

The existing problem is that since the earthwork excavation of deep foundation pits is carried out in layers, that is, before the excavation of each layer of earthwork, the phreatic level in the foundation pit of the layer height must be lowered below the level of the bottom of the layer. Excavators carry out earthwork excavation. Because there are many dewatering well points in the foundation pit, the normal operation of the excavator is hindered. The phenomenon that the excavator overwhelms the well pipe, knocks it crooked, or cuts the well pipe frequently occurs. , leading to the scrapping of the dewatering well points. Since the excavation of deep foundation pits carried out in layers has not been completed, the dewatering of the foundation pits still needs to continue, so deep wells can only be drilled in the foundation pits, and dewatering well points are set up in the foundation pits for the second time, resulting in manpower, Waste of resources and time

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