CN218911481U - Raft foundation dewatering well plugging device - Google Patents
Raft foundation dewatering well plugging device Download PDFInfo
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- CN218911481U CN218911481U CN202222479096.7U CN202222479096U CN218911481U CN 218911481 U CN218911481 U CN 218911481U CN 202222479096 U CN202222479096 U CN 202222479096U CN 218911481 U CN218911481 U CN 218911481U
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Abstract
The utility model relates to the technical field of dewatering well construction and discloses a raft foundation dewatering well plugging device which comprises a variable-diameter sealing cap, a sealing bolt and a sealing plate, wherein the variable-diameter sealing cap comprises a drainage pipe and a connecting pipe for being in threaded connection with a steel pipe of the dewatering well, and the outer diameter of the drainage pipe is smaller than that of the connecting pipe; the sealing bolt is installed in the drain pipe, and the closing cap board welded connection is in the up end of drain pipe, and is filled with little expansion concrete between closing cap board and sealing bolt. By using triple water stopping measures of the sealing bolts, the micro-expansion concrete and the sealing cover plate, water flow is difficult to impact the micro-expansion concrete, the condensation effect of the micro-expansion concrete is guaranteed, the sealing effect is good, the effective sealing of a reserved dewatering well is realized, and the occurrence of water seepage phenomenon and potential safety hazards caused by water seepage are avoided.
Description
Technical Field
The utility model relates to the technical field of dewatering well construction, in particular to a raft foundation dewatering well plugging device.
Background
The raft foundation construction belongs to common construction of urban underground engineering, a precipitation well is reserved in the raft construction to continuously carry out precipitation, and how to plug the reserved precipitation well is a construction difficulty of the raft foundation construction.
The current common practice is to inject micro-expansion coagulation into the dewatering well steel pipe to block the water level, and then weld a steel plate at the end of the dewatering well steel pipe to block. When the dewatering well has larger water flow and larger water pressure, the construction difficulty is high, the micro-expansion concrete is easy to be flushed by the water flow, and micro-cracks are easy to be generated while the condensation of the micro-expansion concrete is influenced. In addition, the quality control requirement of later welded steel plate is higher, if steel plate welding quality is poor then there is very big seepage risk in precipitation well department, can't guarantee shutoff water-proof effects.
In summary, how to effectively block dewatering wells and avoid leakage is a problem to be solved by those skilled in the art.
Disclosure of Invention
Therefore, the utility model aims to provide the raft foundation dewatering well plugging device which is simple to operate, good in plugging effect and applicable to different dewatering conditions.
In order to achieve the above object, the present utility model provides the following technical solutions:
the raft foundation dewatering well plugging device comprises a variable-diameter sealing cap, a sealing bolt and a sealing plate, wherein the variable-diameter sealing cap comprises a drain pipe and a connecting pipe for being in threaded connection with a dewatering well steel pipe, and the outer diameter of the drain pipe is smaller than that of the connecting pipe;
the sealing bolt is installed in the drain pipe, the sealing cover plate is welded and connected to the upper end face of the drain pipe, and micro-expansion concrete is filled between the sealing cover plate and the sealing bolt.
Preferably, the inner peripheral surface of the drain pipe is provided with an internal thread, and the sealing bolt is in threaded connection with the drain pipe.
Preferably, the depth of the internal thread of the connecting pipe is greater than or equal to 1.5mm.
Preferably, waterproof paint layers are arranged between the sealing bolts and the micro-expansion concrete, and between the inner peripheral surface of the connecting pipe and the micro-expansion concrete.
Preferably, a first water stop ring is arranged outside the drain pipe, and the first water stop ring is positioned at the lower part of the drain pipe.
Preferably, a second water stop ring is arranged on the lower end face of the connecting pipe.
When the building construction reaches the bottom elevation, cutting and processing threads on the dewatering well steel pipe, connecting the variable-diameter sealing cap and the processed dewatering well steel pipe in a threaded connection mode, pouring a raft foundation, and carrying out subsequent dewatering operation by utilizing a drain pipe above the variable-diameter sealing cap; after the dewatering operation is finished, sealing the drain pipe by using a sealing bolt, and pouring micro-expansion concrete in the drain pipe; and after the micro-expansion concrete is coagulated, welding a sealing plate on the upper end surface of the drain pipe.
Therefore, the raft foundation dewatering well plugging device provided by the utility model uses the triple water stopping measures of the sealing bolt, the micro-expansion concrete and the sealing cover together, so that water flow is difficult to impact the micro-expansion concrete, the condensation effect of the micro-expansion concrete is ensured, the plugging effect is good, the effective plugging of the reserved dewatering well is realized, and the occurrence of water seepage phenomenon and potential safety hazard caused by water seepage are avoided.
Meanwhile, the raft foundation dewatering well plugging device provided by the utility model has the advantages of simple structure and convenience in operation, can be suitable for different dewatering conditions, such as the conditions of larger dewatering well water flow and larger water pressure, and has wide application range.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a specific embodiment of a raft foundation dewatering well plugging device provided by the utility model;
FIG. 2 is a schematic view of the assembly of the drain pipe and the sealing bolt in a top view;
fig. 3 is a partial enlarged view of fig. 1.
In fig. 1-3:
01 is a precipitation well steel pipe, 02 is a raft foundation, 1 is a variable diameter sealing cap, 2 is a sealing bolt, 21 is a counter bore, 3 is micro-expansion concrete, 4 is a sealing plate, 5 is a first water stop ring, 6 is a second water stop ring, and 7 is a welding seam.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model has the core of providing the raft foundation dewatering well plugging device which is simple to operate, good in plugging effect and applicable to different dewatering conditions.
Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of an embodiment of a raft foundation dewatering well plugging device provided by the present utility model; FIG. 2 is a schematic view of the assembly of the drain pipe and the sealing bolt in a top view; fig. 3 is a partial enlarged view of fig. 1.
The utility model provides a raft foundation dewatering well plugging device, which comprises a variable-diameter sealing cap 1, a sealing bolt 2 and a sealing cover plate 4, wherein the variable-diameter sealing cap 1 comprises a drain pipe and a connecting pipe for being in threaded connection with a dewatering well steel pipe 01, and the outer diameter of the drain pipe is smaller than that of the connecting pipe;
the sealing bolt 2 is installed in the drain pipe, the sealing cover plate 4 is welded and connected to the upper end face of the drain pipe, and micro-expansion concrete 3 is filled between the sealing cover plate 4 and the sealing bolt 2.
Referring to fig. 1, a variable diameter capping cap 1 includes a connecting pipe with a larger diameter for being screwed with a steel pipe 01 of a precipitation well, and a drain pipe with a smaller diameter for performing precipitation operation during raft foundation construction.
Preferably, the depth of the internal thread of the connection pipe may be set to be greater than or equal to 1.5mm to ensure tight connection of the connection pipe and the precipitation well steel pipe 01.
The specific thread depth of the internal thread of the connecting pipe is determined according to factors such as the diameter of the precipitation well steel pipe 01, the precipitation conditions and the like in actual construction, so that water is prevented from leaking from a gap between the connecting pipe and the precipitation well steel pipe 01.
The diameter of the connecting pipe is determined according to the diameter of the dewatering well steel pipe 01 in actual construction, and the diameter of the drain pipe can be determined according to the dewatering condition of a construction site; in order to extend the service life of the variable diameter cap 1, a galvanized steel pipe is generally used as the variable diameter cap 1.
The sealing bolt 2 is installed in the drain pipe, and in order to enable the sealing bolt 2 and the drain pipe to be tightly connected, preferably, the inner circumferential surface of the drain pipe can be provided with internal threads, the sealing bolt 2 is in threaded connection with the drain pipe, the connection strength is high, the connection result is simple, and the processing and the manufacturing are convenient.
Referring to fig. 2, the sealing bolt 2 is usually configured as a socket head bolt, and a socket head wrench is inserted into a counter bore 21 at the head of the sealing bolt 2 to screw the sealing bolt 2 into a drain pipe to seal the drain pipe.
The sealing cover plate 4 is welded and connected to the upper end face of the drain pipe, and in order to ensure the water stopping effect, the welding position of the sealing cover plate 4 and the drain pipe is required to be full and complete, and the welding seam 7 cannot be missed.
And micro-expansion concrete 3 is filled between the sealing bolt 2 and the cover plate 4, and the micro-expansion concrete 3 is used for blocking water flow from leaking along the inner peripheral surface of the drain pipe.
When the building construction reaches the bottom elevation, cutting and processing threads on the precipitation well steel pipe 01, connecting the variable-diameter sealing cap 1 and the processed precipitation well steel pipe 01 in a threaded connection mode, pouring a raft foundation 02, and carrying out subsequent precipitation operation by utilizing a drain pipe above the variable-diameter sealing cap 1; after the dewatering operation is finished, sealing the drain pipe by using the sealing bolt 2, and pouring micro-expansion concrete 3 in the drain pipe; after the micro-expansion concrete 3 is condensed, a sealing cover plate 4 is welded on the upper end surface of the drain pipe.
In this embodiment, sealing bolt 2, micro-expansion concrete 3 and closing cap board 4 triple sealing measures are used to plug precipitation well steel pipe 01 for rivers are difficult to form the impact to micro-expansion concrete 3, have guaranteed micro-expansion concrete 3's setting effect, and the shutoff effect is good, has realized the effective shutoff to reserving precipitation well, has avoided the emergence of infiltration phenomenon and the potential safety hazard that the infiltration brought.
Meanwhile, the raft foundation dewatering well plugging device is simple in structure, convenient to operate, applicable to different dewatering conditions, and wide in application range, and is suitable for the conditions of large dewatering well water flow and large water pressure.
In order to secure the coagulation effect of the micro-expansive concrete 3, it is preferable that a waterproof paint layer is provided between the sealing bolt 2 and the micro-expansive concrete 3, and between the inner circumferential surface of the connection pipe and the micro-expansive concrete 3.
The material and thickness of the waterproof paint layer are determined according to the actual construction requirements with reference to the prior art, and are not described herein.
After the sealing bolt 2 is installed, waterproof paint is coated on the upper end face of the sealing bolt 2 and the inner peripheral face of the connecting pipe to form a waterproof paint layer, and after the waterproof paint layer is dried, micro-expansion concrete 3 is poured into the connecting pipe.
On the basis of the above embodiment, the drain pipe may be provided with a first water stop ring 5 outside, the first water stop ring 5 being located at a lower portion of the drain pipe so as to prevent leakage of moisture along an outer circumferential surface of the drain pipe by the first water stop ring 5.
The specific material, shape and size of the first water stop ring 5 are determined according to the actual construction requirements with reference to the prior art, and will not be described herein.
Preferably, the lower end surface of the connection pipe may be provided with a second water stop ring 6 to prevent water from leaking along the outer circumferential surface of the connection pipe by the second water stop ring 6.
The material, shape and size of the second water stop ring 6 refer to the first water stop ring 5, and are not described herein,
it should be noted that, the first and second water stop rings 5 and 6 in the present application are only used to distinguish the difference in position, and are not limited to the sequence.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The raft foundation dewatering well plugging device provided by the utility model is described in detail above. The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.
Claims (6)
1. The raft foundation dewatering well plugging device is characterized by comprising a variable-diameter sealing cap (1), a sealing bolt (2) and a sealing plate (4), wherein the variable-diameter sealing cap (1) comprises a drainage pipe and a connecting pipe for being in threaded connection with a dewatering well steel pipe (01), and the outer diameter of the drainage pipe is smaller than that of the connecting pipe;
the sealing bolt (2) is installed in the drain pipe, the sealing cover plate (4) is welded and connected to the upper end face of the drain pipe, and micro-expansion concrete (3) is filled between the sealing cover plate (4) and the sealing bolt (2).
2. The raft foundation dewatering well plugging device according to claim 1, wherein the inner peripheral surface of the drainage pipe is provided with internal threads, and the sealing bolt (2) is in threaded connection with the drainage pipe.
3. The raft foundation dewatering well plugging device of claim 1, wherein the depth of the internal threads of the connection pipe is greater than or equal to 1.5mm.
4. The raft foundation dewatering well plugging device according to claim 1, wherein waterproof paint layers are arranged between the sealing bolts (2) and the micro-expansive concrete (3) and between the inner peripheral surface of the connecting pipe and the micro-expansive concrete (3).
5. Raft foundation dewatering well plugging device according to any one of claims 1-4, wherein a first water stop ring (5) is arranged outside the drainage pipe, the first water stop ring (5) being located in the lower part of the drainage pipe.
6. Raft foundation dewatering well plugging device according to any one of claims 1-4, wherein the lower end surface of the connection pipe is provided with a second water stop ring (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222479096.7U CN218911481U (en) | 2022-09-19 | 2022-09-19 | Raft foundation dewatering well plugging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222479096.7U CN218911481U (en) | 2022-09-19 | 2022-09-19 | Raft foundation dewatering well plugging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218911481U true CN218911481U (en) | 2023-04-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222479096.7U Active CN218911481U (en) | 2022-09-19 | 2022-09-19 | Raft foundation dewatering well plugging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218911481U (en) |
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2022
- 2022-09-19 CN CN202222479096.7U patent/CN218911481U/en active Active
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