CN217949109U

CN217949109U - Plugging device for dewatering well

Info

Publication number: CN217949109U
Application number: CN202221812386.2U
Authority: CN
Inventors: 王浩; 任西豪; 汪银伟
Original assignee: China Construction Seventh Engineering Division Corp Ltd
Current assignee: China Construction Seventh Engineering Division Corp Ltd
Priority date: 2022-07-14
Filing date: 2022-07-14
Publication date: 2022-12-02
Anticipated expiration: 2032-07-14

Abstract

The utility model discloses a plugging device for a dewatering well, which comprises a submersible pump and a steel pipe which are arranged in the dewatering well, and also comprises a sand and stone mixing layer, a first concrete layer, a polyurethane waterproof layer, a second concrete layer, a first steel plate, a third concrete layer and a second steel plate which are arranged in the dewatering well from bottom to top in sequence; the submersible pump is completely wrapped by the sand and stone mixing layer, a filter screen is wrapped at a water inlet of the submersible pump, the lower end of the steel pipe is connected with the submersible pump, and the upper end of the steel pipe is positioned in the third concrete layer and is provided with a plug; the first steel plate is sleeved on the steel pipe and is in full welding connection with the steel pipe and the well wall of the dewatering well, and the second steel plate is located at the well mouth of the dewatering well and is in full welding connection with the well wall of the dewatering well; the utility model discloses be provided with the immersible pump in the precipitation well, the accessible immersible pump is in time discharged the water in the precipitation well constantly, makes the utility model discloses can be in the precipitation well water level rise fast, the infiltration volume is under construction normally when great.

Description

Plugging device for dewatering well

Technical Field

The utility model relates to a precipitation well shutoff technical field specifically is a precipitation well plugging device.

Background

After the major structure capping or reach precipitation well shutoff requirement, need carry out precipitation well shutoff according to the design requirement.

The utility model discloses a chinese utility model with application number CN201520335551.3 discloses a precipitation well plugging device, including first seal assembly and second seal assembly, first seal assembly's lower extreme is provided with the tip, first seal assembly cover is put on the precipitation well, simultaneously the tip inserts in the soil around the precipitation well with first seal assembly anchor, a through hole has been seted up to first seal assembly's upper surface, the through hole is used for the delivery pipe to pass, precipitation well plugging device is still including a plug, the plug can insert in the through hole with the perforating hole sealed, second seal assembly is including a sleeve that link up from top to bottom, telescopic surface and precipitation well keep somewhere the sealed cooperation of mouth, sleeve lower part cover is outside at first seal assembly, and the telescopic lower part outside is fixed with the clamp plate, the tip of clamp plate outwards extends to in the soil of foundation ditch bed course below, the space packing between first seal assembly and the second seal assembly has the sealing layer. Above-mentioned precipitation well plugging device has simple structure, can effectively shutoff precipitation well, shutoff quality reliable and stable's advantage.

However, the above-mentioned plugging device for dewatering well has a problem that the construction is difficult when the water level in the dewatering well rises rapidly and the water seepage amount is large.

Disclosure of Invention

An object of the utility model is to provide a precipitation well plugging device aims at improving that current precipitation well plugging device water level in the precipitation well rises very fast, the problem of construction difficulty when the infiltration capacity is great.

The utility model discloses a realize like this:

a plugging device for a dewatering well comprises a submersible pump and a steel pipe which are arranged in the dewatering well, and further comprises a sand and stone mixing layer, a first concrete layer, a polyurethane waterproof layer, a second concrete layer, a first steel plate, a third concrete layer and a second steel plate which are sequentially arranged in the dewatering well from bottom to top; the submersible pump is completely wrapped by the sand and stone mixing layer, a filter screen is wrapped at a water inlet of the submersible pump, the steel pipe is vertically arranged, the lower end of the steel pipe is connected with the submersible pump, the upper end of the steel pipe is positioned in the third concrete layer, and a plug is arranged at the upper end of the steel pipe; no. two steel sheets are located the well head department of precipitation well, and link to each other with the wall of a well full weld of precipitation well.

The sand and stone mixing layer adopts 3.

And the concrete of the first concrete layer, the second concrete layer and the third concrete layer is added with an expanding agent and an early strength agent.

The first concrete layer, the second concrete layer and the third concrete layer are all made of C40 concrete, and the anti-permeability grade of the concrete is P8 grade.

The first concrete layer, the second concrete layer and the third concrete layer are all made of C50 concrete, and the anti-permeability grade of the concrete is P10 grade.

The upper end of the steel pipe is welded with an inner wire connecting pipe, and the plug is installed in the inner wire connecting pipe in a threaded mode.

The distance between the upper end of the first concrete layer and the wellhead of the dewatering well is 300mm, the thicknesses of the polyurethane waterproof layer, the first steel plate and the second steel plate are 10mm, and the upper end face of the second steel plate is flush with the upper wellhead of the dewatering well.

Has the positive and beneficial effects that: 1. the utility model discloses be provided with the immersible pump in the precipitation well, accessible immersible pump is in time discharged the water in the precipitation well continuously, and it is right to have effectively reduced the water in the precipitation well the utility model discloses the influence of construction makes the utility model discloses can be in the precipitation well water level rise faster, the infiltration volume is normally under construction when great. 2. The utility model discloses be provided with three-layer concrete layer, and all add in each layer concrete layer's the concrete and have expanding agent and early coagulant, both improved the performance of concrete, accelerated the setting rate of concrete again, effectively improved each concrete layer's shutoff effect. 3. The polyurethane waterproof layer is arranged on the concrete layer of the lowest layer, and the polyurethane waterproof layer can effectively prevent water in the dewatering well from seeping out of the concrete layer of the lowest layer to influence the construction of a subsequent structure. 4. The utility model discloses be provided with two-layer steel deck, the steel deck links to each other with the wall of a well full weld of precipitation well, has not only improved the utility model discloses the fastness of setting has still further improved the utility model discloses a shutoff effect.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic view of the connection structure of the upper end of the steel pipe of the present invention;

fig. 3 is a schematic structural view of a first steel plate of the present invention;

FIG. 4 is a schematic structural view of a second steel plate according to the present invention;

fig. 5 is a flow chart of the construction process of the utility model.

In the figure, the following steps are shown: immersible pump 1, steel pipe 2, the mixed layer of grit 3, polyurethane waterproof layer 4, steel sheet 5, circular through-hole 501, no. two steel sheets 6, no. 7 concrete layers, no. two concrete layers 8, no. three concrete layers 9, end cap 10, internal thread connecting pipe 11.

Detailed Description

The following further description is made with reference to the accompanying drawings and specific examples:

as shown in fig. 1 and 2, the plugging device for the dewatering well comprises a submersible pump 1, a steel pipe 2, a sand mixing layer 3, a first concrete layer 7, a polyurethane waterproof layer 4, a second concrete layer 8, a first steel plate 5, a third concrete layer 9, a second steel plate 6, an inner wire connecting pipe 11 and a plug 10. Immersible pump 1 and steel pipe 2 all are arranged in the precipitation well, and immersible pump 1 is close to the shaft bottom setting of precipitation well, and immersible pump 1's water inlet parcel has the filter screen for it is blockked up to prevent that immersible pump 1 from drawing water the time mouth. The vertical setting of steel pipe 2, the lower extreme of steel pipe 2 links to each other with immersible pump 1, and the upper end of steel pipe 2 is arranged in No. three concrete layer 9, and the welding of the upper end of steel pipe 2 has internal thread connecting pipe 11, and when drawing water, internal thread connecting pipe 11 is connected with outer drainage pipe, and immersible pump 1 accessible steel pipe 2 and outer drainage pipe discharge the log raft in the precipitation well. When the steel pipe 2 needs to be plugged, the outer drainage pipe connected with the inner wire connecting pipe 11 is detached, and the plug 10 is installed on the inner wire connecting pipe 11.

As shown in fig. 1, the sandstone mixed layer 3, the first concrete layer 7, the polyurethane waterproof layer 4, the second concrete layer 8, the first steel plate 5, the third concrete layer 9 and the second steel plate 6 are sequentially arranged in the precipitation well from bottom to top. The sand and stone mixing layer 3 adopts 3. The distance between the upper end of the first concrete layer 7 and the wellhead of the dewatering well is 300mm, the thicknesses of the polyurethane waterproof layer 4, the first steel plate 5 and the second steel plate 6 are 10mm, and the upper end face of the second steel plate 6 is flush with the wellhead of the dewatering well. The polyurethane waterproof layer 4 can effectively prevent water in the dewatering well from seeping out of the first concrete layer 7 to influence the construction of a subsequent structure. All add the expanding agent in the concrete of concrete layer 7, no. two concrete layers 8 and No. three concrete layers 9, through adding the expanding agent for ordinary concrete becomes the micro-expansive concrete, makes the concrete can rely on the effect of expanding agent and take place certain inflation during the hydration, thereby has compensatied the shrink of concrete, has reduced the concrete crack, has improved the performance of concrete, helps improving each concrete layer's shutoff effect. In addition, early strength agents are added into the concrete of the first concrete layer 7, the second concrete layer 8 and the third concrete layer 9, and can improve the early strength of the concrete, accelerate the hydration speed of cement in the concrete and shorten the setting time of the concrete. Therefore, the early strength agent is added into each concrete layer, so that each concrete layer can be condensed more quickly, and the plugging effect of each concrete layer is further improved. What kind of concrete is used for first concrete layer 7, second concrete layer 8 and third concrete layer 9 can be determined according to design requirements. C40 concrete with an impermeability grade of P8 and C50 concrete with an impermeability grade of P10 are more commonly used.

As shown in fig. 1, fig. 3, fig. 4, a steel sheet 5 and No. two steel sheets 6 are discoid, and its diameter all is the same with the internal diameter of precipitation well, are provided with the circular through-hole 501 that is used for the cover to establish steel pipe 2 on the steel sheet 5, during installation steel sheet 5, steel sheet 5 locates on steel pipe 2 through its circular through-hole 501 cover, and links to each other with the wall of a well full weld of steel pipe 2 and precipitation well, and No. two steel sheets 6 are located the well head department of precipitation well, and link to each other with the wall of a well full weld of precipitation well.

The utility model discloses a construction process: as shown in fig. 1 and 5, a submersible pump 1 and a steel pipe 2 are placed in the dewatering well, an external drainage pipe is connected, the submersible pump 1 is started, and water in the dewatering well is continuously drained. And (3) quickly filling the mixture of the gravel and the sand into the well, filling the mixture 0.4m above the upper end of the submersible pump 1 and tamping the mixture to form a gravel mixed layer 3. And (3) quickly filling the concrete doped with the expanding agent and the early strength agent into the dewatering well, vibrating, and filling the concrete to a position 300mm away from the wellhead of the dewatering well to finish the first concrete layer 7. And continuously pumping water, and stopping pumping after the concrete layer I7 is concreted. And a polyurethane waterproof layer 4 is laid on the first concrete layer 7, and the thickness of the polyurethane waterproof layer 4 is 10mm. And after the polyurethane waterproof layer 4 is laid, filling concrete doped with an expanding agent and an early strength agent into the upper end of the polyurethane waterproof layer 4 to finish a second concrete layer 8. The first steel plate 5 is sleeved on the steel pipe 2 through the circular through hole 501 and is placed on the second concrete layer 8, and the first steel plate 5 is in full-welding connection with the steel pipe 2 and the well wall of the dewatering well. And removing an outer drainage pipe and a power wire, plugging the steel pipe 2 by using a plug 10, then filling concrete doped with an expanding agent and an early strength agent, completing a third concrete layer 9, wherein the upper end of the third concrete layer 9 is 10mm away from a wellhead for placing a second steel plate 6, and fully welding and connecting the second steel plate 6 with the well wall of the wellhead of the dewatering well, namely completing the construction of the whole plugging device.

The utility model discloses a theory of operation: the utility model discloses be provided with immersible pump 1 in the precipitation well, in the work progress, if the water level rises very fast in the precipitation well, the infiltration volume is great, and accessible immersible pump 1 is in time discharged the water in the precipitation well continuously, and it is right to have effectively reduced the water in the precipitation well the utility model discloses the influence of construction makes the utility model discloses can be in the precipitation well water level rise very fast, the infiltration volume is normally under construction when great. The utility model discloses from bottom to top is provided with three-layer concrete layer, and is provided with polyurethane waterproof layer 4 on concrete layer 7 of lower floor, and when concrete layer 7 of lower floor was under construction, accessible immersible pump 1 was continuous takes out the water in the precipitation well, can not influence the construction of concrete layer 7 of lower floor. The polyurethane waterproof layer 4 can effectively prevent water in the dewatering well from seeping out of the first concrete layer 7 at the lowest layer to influence the construction of a subsequent structure. The expansive agent and the early coagulant are added into the concrete of the three concrete layers, so that the performance of the concrete is improved, the coagulation speed of the concrete is accelerated, and the plugging effect of each concrete layer is effectively improved. Furthermore, the utility model discloses still be provided with two-layer steel deck, the steel deck links to each other with the wall of a well full weld of precipitation well, has not only improved the utility model discloses the fastness that sets up has still further improved the utility model discloses a shutoff effect.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A plugging device for a dewatering well comprises a submersible pump (1) and a steel pipe (2) which are arranged in the dewatering well, and is characterized by further comprising a sand and stone mixing layer (3), a first concrete layer (7), a polyurethane waterproof layer (4), a second concrete layer (8), a first steel plate (5), a third concrete layer (9) and a second steel plate (6) which are sequentially arranged in the dewatering well from bottom to top; the submersible pump (1) is completely wrapped by the sand and stone mixed layer (3), a filter screen is wrapped at a water inlet of the submersible pump (1), the steel pipe (2) is vertically arranged, the lower end of the steel pipe (2) is connected with the submersible pump (1), the upper end of the steel pipe (2) is positioned in the third concrete layer (9), and a plug (10) is arranged at the upper end of the steel pipe (2); a steel sheet (5) cover is located on steel pipe (2), and links to each other with the wall of a well full weld of steel pipe (2) and precipitation well, no. two steel sheet (6) are located the well head department of precipitation well, and link to each other with the wall of a well full weld of precipitation well.

2. The plugging device for dewatering well according to claim 1, characterized in that the sand mixing layer (3) is 3.

3. The plugging device for dewatering well according to claim 1, characterized in that an expanding agent and an early strength agent are added in the concrete of the first concrete layer (7), the second concrete layer (8) and the third concrete layer (9).

4. The plugging device for dewatering well according to claim 3, characterized in that the first concrete layer (7), the second concrete layer (8) and the third concrete layer (9) are all made of C40 concrete, and the anti-seepage grade is P8 grade.

5. The plugging device for dewatering well according to claim 3, wherein the first concrete layer (7), the second concrete layer (8) and the third concrete layer (9) are all made of C50 concrete, and the impermeability grade is P10 grade.

6. Plugging device for dewatering wells according to claim 1, characterized in that an inner wire connecting pipe (11) is welded on the upper end of the steel pipe (2), and the plug (10) is threadedly mounted in the inner wire connecting pipe (11).

7. The plugging device for the dewatering well according to any one of claims 1 to 6, wherein the distance between the upper end of the first concrete layer (7) and the wellhead of the dewatering well is 300mm, the thicknesses of the polyurethane waterproof layer (4), the first steel plate (5) and the second steel plate (6) are 10mm, and the upper end face of the second steel plate (6) is flush with the wellhead of the dewatering well.