CN216041263U - Plugging device for steel cover plate of dewatering well - Google Patents

Abstract

The plugging device for the steel cover plate of the dewatering well comprises a steel sleeve and a steel cover plate; the steel sleeve comprises a steel sleeve circular pipe body, wherein two external horizontal wing rings are arranged on the outer side of the steel sleeve, an internal horizontal wing ring is arranged on the inner wall of the steel sleeve, a water stop strip is arranged at the joint of the steel sleeve and the internal horizontal wing ring, a plurality of screws are uniformly distributed on the internal horizontal wing ring in the circumferential direction, a steel cover plate circular plate body is provided, a first through hole is formed in the circumferential edge of the steel cover plate, a second through hole is formed in the middle of the steel cover plate circular plate body, a flow guide pipe is arranged at the position, corresponding to the second through hole, of the upper side of the steel cover plate, and a ball valve is arranged on the flow guide pipe; the steel cover plate is arranged on the built-in horizontal wing ring, and the first through holes and the screw rods are locked through nuts in a one-to-one correspondence mode. This device simple structure, the shutoff is effectual, accomplishes to backfill soil completion, the post-cast strip before accomplishing at the basement construction, continues to take groundwater out from the basement.

Description

Plugging device for steel cover plate of dewatering well

Technical Field

The utility model relates to a plugging device for a steel cover plate of a dewatering well.

Background

In the construction stage of the basement, in order to reduce the underground water level, the precipitation requirement is to reduce the underground water level to be at least 50 centimeters below the building base surface according to the design requirement. The dewatering well needs to continue pumping water and needs to reserve a part of dewatering well after the construction of the basement bottom plate is finished and before the backfilling of the basement and the unclosed post-pouring zone are finished, so that the problem of plugging of the dewatering well occurs.

The existing plugging methods of precipitation wells are two, one is that after precipitation is stopped, the concrete is mixed with plugging agent, quick-hardening cement, plugging king and the like and then the mixture is put into the precipitation well pipe, and the plugging is often ineffective because the water level rises quickly after precipitation is stopped and no air and water sealing measures are taken. The other kind is at the pre-buried flange steel ring of well head, and the pre-buried round screw member in steel ring top, and the later stage is installed on upper portion with the steel sheet, and the quality protection of screw rod is done like this, otherwise often can be because of the unable installation of screw rod corrosion or concrete pollution, and the effective thickness of raft board can't be guaranteed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a plugging device for a steel cover plate of a dewatering well, which has a simple structure and a good plugging effect, and continuously pumps underground water out of a basement before the construction of the basement is finished until backfill soil is finished and a post-cast strip is finished.

The plugging device for the steel cover plate of the dewatering well comprises a steel sleeve and a steel cover plate;

the steel sleeve is a vertically arranged round pipe body, two external horizontal wing rings which are arranged at intervals are welded on the circumferential outer side of the steel sleeve, an internal horizontal wing ring is welded on the circumferential inner wall of the steel sleeve, expansion water stop strips are circumferentially arranged on the upper side of the joint of the steel sleeve and the internal horizontal wing rings, a plurality of screws are circumferentially and uniformly distributed on the internal horizontal wing rings, and the threaded ends of the screws vertically extend upwards;

the steel cover plate is a horizontally arranged round plate body, the inner diameter of the steel cover plate is smaller than 5mm of the inner diameter of the steel sleeve, a first through hole matched with the screw rod is arranged at the circumferential edge of the steel cover plate, a second through hole is arranged in the middle of the steel cover plate, a vertically arranged flow guide pipe is arranged at the position, corresponding to the second through hole, of the upper side of the steel cover plate, and a ball valve is arranged on the flow guide pipe;

the steel cover plate is arranged on the built-in horizontal wing ring, and the first through holes are matched with the screw rods on the built-in horizontal wing ring in a one-to-one correspondence mode and locked through nuts.

For the sake of simple explanation, the plugging device for a dewatering well steel cover plate according to the present invention is simply referred to as the present device below.

The construction method of the device comprises the following steps:

(1) prefabricating a steel sleeve and a corresponding steel cover plate according to the wellhead size of the dewatering well;

(2) welding two external horizontal wing rings which are arranged at intervals up and down on the circumferential outer side of the steel sleeve, and then welding an internal horizontal wing ring on the circumferential inner wall of the steel sleeve;

(3) an expansion water stop strip is arranged on the upper side of the connection part of the steel sleeve and the built-in horizontal wing ring in the circumferential direction;

(4) sleeving a steel pipe at the wellhead of the dewatering well for positioning, pouring concrete on the circumferential outer side of the steel sleeve to complete fixation, and then installing an upwards extending screw rod around the circumferential direction of the built-in horizontal wing ring;

(5) punching a first through hole at the circumferential edge of the steel cover plate for matching with a screw rod on a built-in horizontal wing ring, punching a second through hole in the middle area of the steel cover plate, and installing a flow guide pipe with a ball valve switch at the second through hole;

(6) placing the steel cover plate on the built-in horizontal wing ring, enabling the first through hole to be matched with a screw rod on the built-in horizontal wing ring and locking the first through hole through a nut;

(7) planting steel bars on the upper side of the steel cover plate and pouring concrete to expose the flow guide pipe orifice;

(8) and after the engineering is completely finished, pouring concrete to the guide pipe opening and other rest parts of the dewatering well, and finally enabling the guide pipe opening and the rest parts of the dewatering well to be flush with the ground at the edge of the dewatering well.

The device has the advantages that: this device simple structure, the shutoff is effectual, accomplishes to backfill soil completion, the post-cast strip before accomplishing at the basement construction, continues to take groundwater out from the basement. When the well is sealed, the water pump can be moved out of the well, and the thickness of the concrete of the foundation bottom plate is ensured. The horizontal wing rings on the inner side and the outer side of the steel sleeve block the upward seepage path of underground water vapor on the inner side and the outer side of the sleeve, and can play a role in double-insurance water stopping. The water at the local part which is not tight meets the expansion water stop strip, and the water stop strip can play a role in stopping water. The ball valve water conservancy diversion is reserved on steel apron upper portion, opens the ball valve switch when fastening screw seals the apron, reduces water pressure, improves the shut-in well quality, and the water that simultaneously can also go out with the honeycomb duct is used for basement to wash etc.. And the construction method has simple steps and convenient construction, and is suitable for popularization.

Drawings

Fig. 1 is a schematic structural diagram of a steel bushing in the device.

Fig. 2 is a schematic structural diagram of a steel cover plate in the device.

Fig. 3 is a schematic view of the assembled structure of the device.

Detailed Description

Referring to fig. 1-3, the plugging device for the steel cover plate 2 of the dewatering well comprises a steel sleeve 1 and the steel cover plate 2;

the steel sleeve 1 is a vertically-arranged round pipe body, two external horizontal wing rings 11 which are arranged at intervals up and down are welded on the circumferential outer side of the steel sleeve 1, an internal horizontal wing ring 12 is welded on the circumferential inner wall of the steel sleeve 1, an expansion water stop strip 3 is circumferentially arranged on the upper side of the joint of the steel sleeve 1 and the internal horizontal wing ring 12, a plurality of screw rods 4 are circumferentially and uniformly distributed on the internal horizontal wing ring 12, and the thread ends of the screw rods 4 vertically extend upwards;

the steel cover plate 2 is a horizontally arranged round plate body, the inner diameter of the steel cover plate 2 is 5mm smaller than that of the steel sleeve 1, a first through hole 21 matched with the screw rod 4 is formed in the circumferential edge of the steel cover plate 2, a second through hole 22 is formed in the middle of the steel cover plate 2, a guide pipe 5 which is vertically arranged is arranged at the position, corresponding to the second through hole 22, of the upper side of the steel cover plate 2, and a ball valve 6 is arranged on the guide pipe 5;

the steel cover plate 2 is arranged on the built-in horizontal wing ring 12, and the first through holes 21 are correspondingly matched with the screw rods 4 on the built-in horizontal wing ring 12 one by one and locked through nuts 7.

The construction method of the device comprises the following steps:

(1) prefabricating a steel sleeve 1 and a corresponding steel cover plate 2 according to the wellhead size of the dewatering well;

(2) welding two external horizontal wing rings 11 which are arranged at intervals up and down on the circumferential outer side of the steel sleeve 1, and then welding one internal horizontal wing ring 12 on the circumferential inner wall of the steel sleeve 1;

(3) an expansion water stop strip 3 is circumferentially arranged on the upper side of the joint of the steel sleeve 1 and the built-in horizontal wing ring 12;

(4) sleeving a steel pipe at the wellhead of the dewatering well for positioning, pouring concrete on the circumferential outer side of the steel sleeve 1 to complete fixation, and then installing an upwards extending screw rod 4 around the circumferential direction of a built-in horizontal wing ring 12;

(5) punching a first through hole 21 at the circumferential edge of the steel cover plate 2 for matching with a screw rod 4 on a built-in horizontal wing ring 12, punching a second through hole 22 in the middle area of the steel cover plate 2, and installing a flow guide pipe 5 with a ball valve 6 switch at the second through hole 22;

(6) placing the steel cover plate 2 on the built-in horizontal wing ring 12, enabling the first through hole 21 to be matched with the screw rod 4 on the built-in horizontal wing ring 12 and locking the screw rod through the nut 7;

(7) planting steel bars on the upper side of the steel cover plate 2 and pouring concrete to expose the opening of the guide pipe 5;

(8) and after the project is completely finished, pouring concrete to the opening of the guide pipe 5 and other rest parts of the dewatering well, and finally enabling the concrete to be flush with the ground at the edge of the dewatering well.

The device has the advantages that: this device simple structure, the shutoff is effectual, accomplishes to backfill soil completion, the post-cast strip before accomplishing at the basement construction, continues to take groundwater out from the basement. When the well is sealed, the water pump can be moved out of the well, and the thickness of the concrete of the foundation bottom plate is ensured. The horizontal wing rings on the inner side and the outer side of the steel sleeve 1 block the upward seepage path of underground water vapor on the inner side and the outer side of the sleeve, and can play a role in double-insurance water stopping. The water at the local part which is not tight meets the expansion water stop strip 3, and the water stop strip 3 plays a role in stopping water. The ball valve 6 water conservancy diversion is reserved on 2 upper portions of steel apron, opens the ball valve 6 switch when fastening screw 4 seals the apron, reduces water pressure, improves the shut-in quality, can also be used for basement to wash etc. with the water that honeycomb duct 5 goes out simultaneously. And the construction method has simple steps and convenient construction, and is suitable for popularization.

Claims (1)

1. Precipitation well steel cover plate plugging device, its characterized in that: comprises a steel sleeve and a steel cover plate;

the steel sleeve is a vertically arranged round pipe body, two external horizontal wing rings which are arranged at intervals are welded on the circumferential outer side of the steel sleeve, an internal horizontal wing ring is welded on the circumferential inner wall of the steel sleeve, expansion water stop strips are circumferentially arranged on the upper side of the joint of the steel sleeve and the internal horizontal wing rings, a plurality of screws are circumferentially and uniformly distributed on the internal horizontal wing rings, and the threaded ends of the screws vertically extend upwards;

the steel cover plate is a horizontally arranged round plate body, the inner diameter of the steel cover plate is smaller than 5mm of the inner diameter of the steel sleeve, a first through hole matched with the screw rod is arranged at the circumferential edge of the steel cover plate, a second through hole is arranged in the middle of the steel cover plate, a vertically arranged flow guide pipe is arranged at the position, corresponding to the second through hole, of the upper side of the steel cover plate, and a ball valve is arranged on the flow guide pipe;

the steel cover plate is arranged on the built-in horizontal wing ring, and the first through holes are matched with the screw rods on the built-in horizontal wing ring in a one-to-one correspondence mode and locked through nuts.

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