CN204825938U - Local precipitation device of foundation ditch - Google Patents

Abstract

The utility model proposes a local dewatering device for a foundation pit, comprising: a water storage pit located at the bottom of the foundation pit, a permeable cement well pipe located at the center of the water storage pit, and a steel pipe located on the upper part of the permeable cement well pipe; the diameter of the water storage pit Not less than 500 mm; the outer side of the steel pipe is welded with a water-stop ring; the top opening of the steel pipe is welded with a water-stop blind plate; the bottom of the permeable cement well pipe is equipped with a water pump; the gap between the water storage pit and the permeable cement well pipe is filled with a gravel layer ; Cushion concrete is provided on the upper part of the water storage pit and the gravel layer, and the outer side of the steel pipe. The beneficial effects of the utility model are as follows: by setting the dewatering device described in the utility model in the partial sump at the bottom of the foundation pit, it is possible to effectively solve the problems of the sump, such as elevators, which are partially located below the water level line, after the completion of large-scale dewatering. The drainage problem avoids the cumbersome construction of setting up multiple sumps around the foundation pit, shortens the construction time, and reduces the construction cost.

Description

A local dewatering device for a foundation pit

technical field

The utility model relates to the technical field of building construction engineering, in particular to a local dewatering device for foundation pits.

Background technique

The foundation pit is an earth pit excavated at the foundation design position according to the base level and foundation plane size. When excavating foundation pits in construction projects, if the groundwater level is relatively high and the base level is below the groundwater level, drainage methods need to be set up. The sump pit is a relatively simple way, which is suitable for basement depths less than 5 meters. At present, in the construction process of construction projects, after the bottom of the building foundation pit is dewatered in a large area, the sump pits such as elevators are often below the waterline. This kind of partial project has a short construction period. The scheme of setting up multiple sump pits has high construction cost and long construction time. Therefore, there is an urgent need for a simple and easy device with low construction cost to meet the short-term precipitation project.

Utility model content

The utility model provides a local dewatering device for foundation pits, which solves the problems of high construction cost and long construction time of the foundation pit dewatering devices in the prior art.

The technical scheme of the utility model is achieved in that:

A local dewatering device for a foundation pit, comprising: a water storage pit at the bottom of the foundation pit, a permeable cement well pipe at the center of the water storage pit, and a steel pipe at the upper part of the permeable cement well pipe; the water storage pit The diameter is not less than 500 mm; the outer side of the steel pipe is welded with a water stop ring; the top opening of the steel pipe is welded with a water stop blind plate; the bottom of the permeable cement well pipe is provided with a water pump; the water storage pit and the A gravel layer is filled between the permeable cement well pipes; cushion concrete is arranged on the upper part of the water storage pit and the gravel layer, and the outer side of the steel pipe.

Preferably, the diameters of the permeable cement well pipe and the steel pipe are both 300 mm.

Preferably, the water stop ring has a width of 50-70 mm and a thickness of 3 mm.

Preferably, the thickness of the water-stop blind plate is 5 mm.

Preferably, the permeable cement well pipe has a height of 800-1000 mm; the steel pipe has a height of 300-500 mm.

The working principle of the foundation pit local dewatering device described in the utility model is as follows:

The dewatering device is installed in a local sump at the bottom of the foundation pit (such as a sump below the waterline such as an elevator). After large-scale precipitation, the water in the sump enters through the cushion concrete and gravel layer In the permeable cement well pipe, when the water level in the dewatering device gradually rises to the water stop ring, under the action of the water stop ring, it no longer permeates upwards, but turns to both sides to infiltrate; the water in the permeable cement well pipe is pumped out by the water pump , Take out the water pump before the foundation floor concrete is poured.

The beneficial effects of the utility model are:

By arranging the dewatering device described in the utility model in the partial sump at the bottom of the foundation pit, it can effectively solve the drainage problem of the sump, such as elevators, which are partially below the water level line after the large-scale dewatering is completed, avoiding the problem of water drainage in the sump in the foundation pit. The cumbersome construction of setting up multiple sump pits around shortens the construction time and reduces the construction cost.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the structural representation of the local dewatering device of the foundation pit described in the utility model;

In the picture:

1. Water storage pit, 2. Permeable cement well pipe, 3. Steel pipe, 4. Water stop ring, 5. Water stop blind plate, 6. Cushion concrete, 7. Water pump, 8. Gravel layer.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As can be seen from the embodiment shown in Figure 1, a local dewatering device for a foundation pit according to the utility model includes: a water storage pit 1 at the bottom of the foundation pit, a permeable cement well pipe 2 at the center of the water storage pit 1, and The steel pipe 3 located on the upper part of the permeable cement well pipe 2; the diameter of the water storage pit 1 is not less than 500 mm; the outer side of the steel pipe 3 is welded with a water stop ring 4; the top opening of the steel pipe 3 is welded with a water stop blind plate 5; the permeable cement well pipe A water pump 7 is provided at the bottom of 2; a gravel layer 8 is filled between the water storage pit 1 and the permeable cement well pipe 2; a cushion concrete 6 is provided on the upper part of the water storage pit 1 and the gravel layer 8, and the outer side of the steel pipe 3.

The diameters of the above-mentioned permeable cement well pipe 2 and the steel pipe 3 are both 300 mm. The height of the permeable cement well pipe 2 is 800-1000 mm; the height of the steel pipe 3 is 300-500 mm.

The width of the above-mentioned water stop ring 4 is 50-70 millimeters, and its thickness is 3 millimeters. The thickness of the above-mentioned water-stop blind plate 5 is 5 millimeters.

The working principle of the above-mentioned local dewatering device for the foundation pit is as follows:

The dewatering device is installed in a local sump at the bottom of the foundation pit (such as a sump below the waterline such as an elevator). 8 enters the permeable cement well pipe 2, and when the water level in the dewatering device gradually rises to the water stop ring 4, under the action of the water stop ring 4, it no longer permeates upwards, but turns to both sides to infiltrate; through the water pump 7, the permeable The accumulated water in the cement well pipe 2 is drawn out, and the water pump 7 is taken out before the foundation floor concrete is poured.

In summary, the utility model can effectively solve the problems of elevators and other sumps that are partially located below the water level line after a large area of precipitation is completed by arranging the dewatering device described in the utility model in the partial sump at the bottom of the foundation pit. The drainage problem avoids the cumbersome construction of setting up multiple sumps around the foundation pit, shortens the construction time, and reduces the construction cost.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (5)

1. A local dewatering device for a foundation pit is characterized in that it comprises: a water storage pit (1) positioned at the bottom of the foundation pit, a permeable cement well pipe (2) positioned at the center of the water storage pit (1), and a The steel pipe (3) on the upper part of the permeable cement well pipe (2); the diameter of the water storage pit (1) is not less than 500 millimeters; the outer side of the steel pipe (3) is welded with a water stop ring (4); the steel pipe The top opening of (3) is welded with a water-stop blind plate (5); the bottom of the permeable cement well pipe (2) is provided with a water pump (7); the water storage pit (1) and the permeable cement well pipe ( 2) The gravel layer (8) is filled in between; the upper part of the water storage pit (1) and the gravel layer (8), and the outer side of the steel pipe (3) are provided with cushion concrete (6). 2. A local dewatering device for a foundation pit according to claim 1, characterized in that the diameters of the permeable cement well pipe (2) and the steel pipe (3) are both 300 mm. 3. A local dewatering device for foundation pit according to claim 2, characterized in that, the width of the water stop ring (4) is 50-70 mm, and its thickness is 3 mm. 4. A local dewatering device for a foundation pit according to claim 2, characterized in that the thickness of the water-stop blind plate (5) is 5 millimeters. 5. A local dewatering device for foundation pit according to claim 1, characterized in that, the height of the permeable cement well pipe (2) is 800-1000 mm; the height of the steel pipe (3) is 300-500 mm mm.