CN212294714U

CN212294714U - Basement precipitation well plugging device

Info

Publication number: CN212294714U
Application number: CN202020970587.XU
Authority: CN
Inventors: 郑启年; 甄朝阳; 黄亮; 侯珍珠
Original assignee: GUANGDONG JINHUIHUA GROUP CO Ltd
Current assignee: GUANGDONG JINHUIHUA GROUP CO Ltd
Priority date: 2020-06-01
Filing date: 2020-06-01
Publication date: 2021-01-05
Anticipated expiration: 2030-06-01

Abstract

A basement dewatering well plugging device comprises a wellhead cover plate arranged on a dewatering well, wherein a sleeve is fixed on the wellhead cover plate and penetrates through the wellhead cover plate up and down; a water plugging and seepage preventing mechanism is arranged in the sleeve; the water plugging and seepage preventing mechanism comprises a plugging mechanism and a seepage preventing structure, and the plugging mechanism is fixedly or detachably arranged in the sleeve and plugs the bottom of the sleeve; the anti-seepage structure comprises a first anti-seepage layer and a second anti-seepage layer which are sequentially arranged from bottom to top, and the upper part of the sleeve outside the second anti-seepage layer is plugged by a cover plate and concrete. The utility model provides a pair of basement precipitation well plugging device can accomplish the encapsulation of steel deck and pouring of concrete in the short time, can realize the target of quick shutoff precipitation well.

Description

Basement precipitation well plugging device

Technical Field

The utility model belongs to the technical field of precipitation well shutoff and specifically relates to a basement precipitation well plugging device.

Background

The dewatering well is a well which is dug for reducing the underground water level, and the pump is used for pumping the underground water after the dewatering well is dug so as to reduce the underground water level. The plugging construction technology of the foundation pit dewatering well is a key point in the whole foundation construction, the water stopping effect of the foundation pit dewatering well and the waterproof quality of foundation bottom plate concrete are directly influenced, so that the construction of a basement foundation is influenced, the challenges are brought to precipitation in the construction process of the basement concrete bottom plate and plugging of a wellhead after the precipitation is finished, and an effective wellhead plugging structure is required to be adopted. The existing wellhead plugging structure is not uniform, the types are various, the operation is inconvenient, the plugging speed is low, the integrity is poor, and the waterproof effect is not ideal.

1) And 30-40 basement dewatering wells of the existing general house building are provided, and some well mouth plugging structures are connected by bolts to be installed at multiple positions, so that the installation efficiency is low.

2) The mode that adopts complete shutoff precipitation well does not have the headspace, and low pressure water in the later stage precipitation well can rise, permeates the concrete layer upper strata, leads to the shutoff to become invalid.

3) In many patents, a steel sleeve (cylinder) is arranged above a dewatering well, but the outer wall of the sleeve is not subjected to waterproof and anti-corrosion treatment, the interior of the dewatering well is dark and moist, electrochemical corrosion is easy to generate on the outer wall of metal, the steel sleeve and even the whole anti-seepage structure are corroded after a long time, and the durability and the usability of the device are reduced.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a basement dewatering well plugging device, which is convenient to manufacture, low in manufacturing cost and convenient to construct and operate, constructors only need a few simple operations, the steel cover plate can be packaged and concrete can be poured in a short time, and the aim of quickly plugging a dewatering well can be achieved; in addition, the structural strength and the waterproof performance of the basement bottom plate can be improved, and the basement bottom plate is safe and effective.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

a basement dewatering well plugging device comprises a wellhead cover plate arranged on a dewatering well, wherein a sleeve is fixed on the wellhead cover plate and penetrates through the wellhead cover plate up and down; a water plugging and seepage preventing mechanism is arranged in the sleeve; the water plugging and seepage preventing mechanism comprises a plugging mechanism and a seepage preventing structure, and the plugging mechanism is fixedly or detachably arranged in the sleeve and plugs the bottom of the sleeve; the anti-seepage structure comprises a first anti-seepage layer and a second anti-seepage layer which are sequentially arranged from bottom to top, and the upper part of the sleeve outside the second anti-seepage layer is plugged by a cover plate and concrete.

The plugging mechanism comprises a supporting rod, a support bracket is arranged at the upper part of the supporting rod and is tightly clamped with the inner wall of the sleeve, and a plugging piece is arranged at the lower part of the supporting rod and plugs the orifice of the sleeve; or the plugging mechanism is a simple fixing plate which is fixedly connected with the sleeve.

The support comprises a support rod, a lining ring is sleeved on the support rod, the upper end of the support rod is limited through a first nut, a plurality of connecting rods are hinged to the outer side of the lining ring in the circumferential direction, the other end of each connecting rod is hinged to a foot block, and the foot blocks are clamped with grooves in the inner wall of the sleeve.

The plugging piece comprises a tray fixed at the bottom of the supporting rod, a rubber cushion block penetrates through the supporting rod, the lower end of the rubber cushion block is supported by the tray, and the upper end of the rubber cushion block is fixed through a gasket and a second nut.

The upper part of the rubber cushion block is inserted into the sleeve, the lower part of the rubber cushion block is positioned outside the sleeve, and the outer wall of the rubber cushion block protrudes forwards.

The wellhead cover plate is of a reinforced concrete structure, and the outer diameter of the wellhead cover plate is the same as that of the dewatering well; the center of the well mouth cover plate is provided with a through hole, the inner diameter of the through hole is matched with the outer diameter of the sleeve,

the casing is welded with a snap ring, the side wall of the snap ring is in an arc shape or a linear shape, the bottom surface of the snap ring is horizontal, and the casing is suspended at the through hole of the well head cover plate through the snap ring.

The middle-upper part of the sleeve is welded with shear nails which are uniformly distributed along the circumferential direction.

The first impermeable layer is made of epoxy resin, the height of the epoxy resin injected is not more than half of the height of the sleeve, the second impermeable layer is made of cement mortar, micro-expansion concrete or quick-hardening concrete, and the cement mortar, the micro-expansion concrete or the quick-hardening concrete is doped with an impermeable agent during mixing.

The utility model relates to a basement precipitation well plugging device has following technological effect:

1) placing a wellhead cover plate on the precipitation well, placing a steel sleeve on the wellhead cover plate, placing a plugging mechanism in the steel sleeve, locking the plugging mechanism by using a single nut, and finally pouring an impermeable layer; construction convenient operation, constructor only need several simple operations, can accomplish the encapsulation of steel cover plate and pouring of concrete in the short time, can realize the target of quick shutoff precipitation well, and is safe effective.

2) The concrete layer pouring construction around can be completed earlier through putting into well head apron, steel casing pipe in advance, reserves the rim of a cup of sleeve pipe position at last, waits to bury again after later stage precipitation well shutoff is accomplished, guarantees that precipitation well shutoff construction installation can not influence the thickness on former design basement bottom plate certain concrete placement layer for basement bottom plate fuses, does not have the bulge, and is whole very level and smooth.

3) Welding a shear nail outside the steel sleeve to enable the shear nail to be fused with surrounding concrete to form a whole; epoxy resin, cement mortar and the like are injected into the steel sleeve, no chemical reaction occurs between the epoxy resin and the cement mortar, the physical properties are compatible, and the infiltration resistance of the steel sleeve is improved. Through the combination of the inner shear nails and the outer shear nails and the impermeable layer, the structural strength and the waterproof performance of the basement bottom plate are ensured, and the durability of the device are improved.

4) The plugging mechanism is arranged, the rubber cushion block is used for plugging the bottom of the steel sleeve, so that when epoxy resin and cement mortar are injected, the influence on the dewatering well can be avoided, the sufficient space is reserved in the dewatering well, and the low-pressure water at the lower part is enabled to be provided with a sufficient storage space (if the injected material is directly used for landfill of the dewatering well, the low-pressure water level at the later stage can rise and damage a plugging piece and overflow the surface of a basement).

5) The lining support is detachably mounted, so that the support rod is fixed in the steel sleeve; plugging the bottom of the steel sleeve by using a rubber cushion block at the lower end of the steel sleeve; in the whole process, the plugging mechanisms can be detached, so that the plugging mechanisms can be detached before concrete in the cup mouth is not poured, and the plugging mechanisms can be extracted again when water is pumped out of the dewatering well midway, so that the water level is prevented from rising to overflow into a foundation pit.

Drawings

The invention will be further explained with reference to the following figures and examples:

fig. 1 is a schematic diagram of the middle casing of the present invention after installation.

Fig. 2 is a schematic view of the inner plugging mechanism of the sleeve of the present invention.

Fig. 3 is the utility model discloses the construction is pour the schematic diagram after accomplishing.

Fig. 4 is a schematic view of the middle plugging mechanism of the present invention.

Fig. 5 is a front view of the middle support rod of the present invention.

Fig. 6 is a schematic view of the middle susceptor bracket of the present invention.

Fig. 7 is a main sectional view of the middle rubber cushion block of the present invention.

Fig. 8 is a front cross-sectional view of the gasket of the present invention.

In the figure: the anti-seepage device comprises a dewatering well 1, a well head cover plate 2, a sleeve 3, a groove 4, a waterproof layer 5, a shear nail 6, a concrete cushion layer 7, a reinforced concrete bottom plate 8, a cover plate 9, a rubber gasket 10, a foot block 11, a support rod 12, a tray 13, a rubber cushion block 14, a gasket 15, a second nut 16, a lining ring 17, a first nut 18, a first anti-seepage layer 19, concrete 20, a connecting rod 21, a rotating shaft 22, a clamping ring 23 and a second anti-seepage layer 24.

Detailed Description

As shown in figure 1, the plugging device for the basement dewatering well comprises a well head cover plate 2, wherein the well head cover plate 2 is of a reinforced concrete structure. The outer diameter of the wellhead cover plate 2 is the same as that of the dewatering well 1 (the diameter of the cover plate can be at most slightly smaller than that of the wellhead, after the cover plate is covered, cement mortar is needed to be smeared on gaps to block water seepage channels, the water seepage channels can only be smeared under the manhole when the diameter is larger, smearing is not good, smearing quality is not seen by eyes, smearing is good when the diameter is the same or slightly smaller), a through hole is reserved in the center of the wellhead cover plate 2, and the diameter of the through hole is slightly larger than that of the sleeve 3. The sleeve 3 is steel casing pipe structure, and lower extreme has welded snap ring 23 in the sleeve 3 outer wall, and the outer wall of snap ring 23 is flowing arcuation or threadiness (be favorable to laminating, linking up of steel sleeve and apron face corner), and the bottom surface level of snap ring 23, snap ring 23 hoop weld on steel sleeve 3, and when the sleeve 3 penetrated the through-hole of well head apron 2, sleeve 3 supported and kept the vertical state with well head apron 2 terminal surface through snap ring 23.

As shown in fig. 1, the shear nails 6 are welded at the middle-upper part of the casing 3, and are uniformly distributed along the circumferential direction at moderate intervals to strengthen the integrity of the casing 3 and the surrounding concrete.

As shown in fig. 3, a water plugging and seepage preventing mechanism is installed inside the casing 3, and the water plugging and seepage preventing mechanism comprises a plugging mechanism and a seepage preventing structure, wherein the plugging mechanism is fixedly or detachably installed in the casing 3 and plugs the bottom of the casing 3, so that the invasion of underground water can be prevented preliminarily; the anti-seepage structure comprises a first anti-seepage layer 19 and a second anti-seepage layer 24 which are sequentially arranged from bottom to top, and the upper part of the sleeve 3 outside the second anti-seepage layer 24 is sealed by a cover plate 9 and concrete 20. The seepage-proofing structure can completely isolate water from permeating.

Specifically, as shown in fig. 2-3, the plugging mechanism comprises a support rod 12, a support bracket is arranged at the upper part of the support rod 12, the support bracket is tightly clamped with the inner wall of the casing 3, and the support bracket supports the whole plugging mechanism to prevent the plugging mechanism from falling into the well; the lower part of the support rod 12 is provided with a plugging piece which plugs the pipe orifice of the sleeve 3 to prevent the invasion of groundwater.

As shown in fig. 2 and 4-6, the susceptor bracket includes a bushing ring 17, and the bushing ring 17 is sleeved on the support rod 12 and can slide up and down along the support rod 12. At least three connecting rods 21 are circumferentially arranged on the outer side of the bushing ring 17, one end of each connecting rod 21 is hinged with the bushing ring 17 through a rotating shaft 22, the other end of each connecting rod 21 is hinged with the corresponding foot block 11 through the rotating shaft 22, and the foot blocks 11 are clamped in the corresponding grooves 4 in the inner wall of the sleeve 3. When the installation is carried out, the foot blocks 11 are correspondingly clamped into the grooves 4, then the lining ring 17 is moved downwards, the lining ring 17 applies force downwards through the connecting rod 21 to gradually jack the foot blocks 11 tightly, then the first nut 18 is screwed downwards, and the lining ring 17 is limited to move upwards through the first nut 18, so that the purpose of jacking tightly is achieved.

As shown in fig. 2 and 7-8, the blocking member includes a tray 13, a rubber pad 14 and a gasket 15.

The tray 13 is circular and is fixedly connected with the support rod 12 and is positioned at the bottom of the support rod 12.

The rubber cushion block 14 comprises a cylindrical upper part and a round cake-shaped lower part, wherein the maximum outer diameter of the round cake-shaped lower part is 2 mm-5 mm larger than the inner diameter of the sleeve 3, and the diameter of the cylindrical upper part is the same as the inner diameter of the sleeve 3. A round hole is reserved in the center of the rubber cushion block 14, and the diameter of the round hole is slightly larger than the outer diameter of the support rod 12. The rubber pad 14 is placed on the tray 13 at the bottom end of the support rod 12 through the support rod 12 via a circular hole. The rubber cushion block 14 is hard in material, corrosion resistant and small in deformation when stressed.

The gasket 15 is cylindrical, a through hole is reserved in the center, the diameter of the through hole is slightly larger than that of the supporting rod 12, the gasket 15 penetrates through the supporting rod 12 through the through hole and is placed on the rubber cushion block 14, and the gasket is fixed on the supporting rod through the second nut 16, so that the rubber cushion block 14 is guaranteed not to deform integrally in the process of being inserted into the sleeve 3.

As shown in fig. 3, the first impermeable layer 19 is epoxy resin, the second impermeable layer is cement mortar, micro-expansive concrete or fast hardening concrete, the height of the epoxy resin is not more than half of the height of the casing 3 (the epoxy resin mainly blocks the gaps below and around, and is waterproof and air-proof, so that much work is not needed, and much waste is made, so that the maximum amount is half), and the cement mortar, the micro-expansive concrete or the fast hardening concrete is mixed with the impermeable agent during mixing.

A basement precipitation well plugging device comprises the following steps:

step 1), placing a well cover plate 2: the well head cover plate 2 needs to be manufactured in a factory in advance, transported to a construction site in batches, and constructed and placed in the well head cover plate 2. After the installation is finished, waterproof paint is coated on the inner wall of the central through hole of the well cover plate 2.

Step 2), installing the sleeve 3: the snap ring 23 on the sleeve 3 and the shear pin 6 are welded in advance; and then coating waterproof paint on the part of the sleeve 3 below the snap ring 23 and the bottom surface of the sleeve 3, and finally inserting the sleeve 3 into the middle hole of the wellhead cover plate 2 for placing, so as to ensure that the sleeve 3 is basically free of deflection, and then coating the waterproof paint on the joint of the sleeve 3 and the wellhead cover plate 2 and the snap ring 23, thereby preventing the formation of a channel for water fine infiltration.

Description of the drawings: in the steps 1) to 2), the installation of the well head cover plate 2 and the casing 3 can be assembled and fixed in advance in a factory, or can be directly installed on a construction site without assembling.

Step 3), concrete layer pouring construction: the pouring construction of each corresponding concrete layer is carried out according to the basement bottom plate foundation concrete pouring construction design drawing, and the pouring construction mainly comprises the construction of a concrete cushion 7, a waterproof layer 5 and a reinforced concrete bottom plate 8, as shown in figure 2. When the reinforced concrete bottom plate 8 is constructed, a cup mouth at the position of the sleeve 3 is reserved, and the water is filled after the later stage dewatering well 1 is plugged.

Step 4), installing a plugging mechanism in the sleeve 3: the rubber cushion block 14 and the gasket 15 are sequentially passed through the support rod 12 and then tightened by the second nut 16. After the support rods are assembled, waterproof paint is coated on the end face of the tray 13 at the bottom end of the support rod 12 to prevent the corrosion of underground water. Then, the support rod 12 is inserted into the sleeve 3 by being lifted up until the lower portion of the rubber mat 14 is exposed out of the sleeve 3 in a pie shape as shown in fig. 2. Then, the support bracket is sleeved, the foot blocks 11 are aligned with the respective grooves 4, the first nuts 18 are fastened and are continuously screwed, and the connecting rods 21 are forced to transmit force to the foot blocks 11 along with the descending of the backing rings 17 until the foot blocks 11 are completely and stably embedded in the grooves 4.

Step 5), waterproof measure treatment: then, a certain amount of epoxy resin is injected into the casing 3, the injection amount is not more than half of the height of the casing 3, and cement mortar doped with the anti-seepage agent is poured until the casing 3 is filled. Standing for a period of time, and sealing when the strength of the cement mortar meets the design requirement. The cover plate 9 is covered, and a rubber gasket 10 is firstly arranged on the top surface of the sleeve 3 before the cover plate 9 is covered.

Step 6), pouring concrete at the cup rim: concrete 20 is poured above the cover plate 9 to fill the cup mouth and form a whole with the surrounding concrete bottom plate.

Claims

1. The utility model provides a basement precipitation well plugging device which characterized in that: the device comprises a wellhead cover plate (2) arranged on a dewatering well (1), wherein a sleeve (3) is fixed on the wellhead cover plate (2), and the sleeve (3) vertically penetrates through the wellhead cover plate (2); a water plugging and seepage preventing mechanism is arranged in the sleeve (3); the water plugging and seepage preventing mechanism comprises a plugging mechanism and a seepage preventing structure, the plugging mechanism is fixedly or detachably arranged in the sleeve (3) and plugs the bottom of the sleeve (3); the anti-seepage structure comprises a first anti-seepage layer (19) and a second anti-seepage layer (24) which are sequentially arranged from bottom to top, and the upper part of the sleeve (3) outside the second anti-seepage layer (24) is plugged by a cover plate (9) and concrete (20).

2. The plugging device for the basement dewatering well according to claim 1, characterized in that: the plugging mechanism comprises a supporting rod (12), a susceptor support is arranged at the upper part of the supporting rod (12), the susceptor support is tightly clamped with the inner wall of the sleeve (3), and a plugging piece is arranged at the lower part of the supporting rod (12) and plugs the pipe orifice of the sleeve (3); or the plugging mechanism is a simple fixing plate which is fixedly connected with the sleeve (3).

3. The plugging device for the basement dewatering well according to claim 2, characterized in that: the support comprises a lining ring (17), the lining ring (17) is sleeved on the support rod (12), the upper end of the lining ring (17) is limited through a first nut (18), a plurality of connecting rods (21) are hinged to the outer side of the lining ring (17) in the circumferential direction, the other end of each connecting rod (21) is hinged to a foot block (11), and the foot blocks (11) are clamped with grooves (4) in the inner wall of the sleeve (3).

4. The plugging device for the basement dewatering well according to claim 2, characterized in that: the plugging piece comprises a tray (13) fixed to the bottom of the supporting rod (12), a rubber cushion block (14) penetrates through the supporting rod (12), the lower end of the rubber cushion block is supported by the tray (13), and the upper end of the rubber cushion block is fixed through a gasket (15) and a second nut (16).

5. The plugging device for the basement dewatering well according to claim 4, wherein the plugging device comprises: the upper part of the rubber cushion block (14) is inserted into the sleeve (3), and the lower part of the rubber cushion block (14) is positioned outside the sleeve (3) and the outer wall of the rubber cushion block protrudes forwards.

6. The plugging device for the basement dewatering well according to claim 1, characterized in that: the wellhead cover plate (2) is of a reinforced concrete structure, and the outer diameter of the wellhead cover plate (2) is the same as that of the dewatering well (1); the center of the well head cover plate (2) is provided with a through hole, and the inner diameter of the through hole is matched with the outer diameter of the sleeve (3).

7. The plugging device for the basement dewatering well according to claim 1, characterized in that: the outer portion of the sleeve (3) is welded with a clamping ring (23), the side wall of the clamping ring (23) is in an arc shape or a linear shape, the bottom surface of the clamping ring is horizontal, and the sleeve (3) is suspended at a through hole of the well head cover plate (2) through the clamping ring (23).

8. The plugging device for the basement dewatering well according to claim 1, characterized in that: shear nails (6) are welded at the middle-upper part of the sleeve (3), and the shear nails (6) are uniformly distributed along the annular direction.

9. The plugging device for the basement dewatering well according to claim 1, characterized in that: the first impermeable layer (19) is made of epoxy resin, the height of the epoxy resin injected is not more than half of the height of the sleeve (3), the second impermeable layer (24) is made of cement mortar, micro-expansion concrete or fast-hardening concrete, and the cement mortar, the micro-expansion concrete or the fast-hardening concrete is doped with an impermeable agent during mixing.