Bottom-sealed well casing
By installing a sealing wooden board at the bottom of the well pipe and connecting it to the concrete layer with anchoring steel bars, the problem of poor sealing at the bottom of the well pipe was solved, thus improving the stability of the well pipe and the water reduction effect.
Patent Information
- Application Number
- CN202520304105.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-02-24
AI Technical Summary
Well casing dewatering is ineffective, especially in geological conditions with confined water head and sand layers. Poor sealing at the bottom of the well casing leads to well casing tilting and sand inrush, affecting the effective dewatering depth and the dewatering effect of the foundation pit.
The well casing structure adopts a bottom-sealing structure, including a bottom section well casing, a capping wooden board, and anchoring steel bars. The anchoring steel bars are connected to the concrete layer inside the bottom section well casing to seal the bottom end of the well casing, enhance the sealing effect, and prevent the well casing from tilting and sand from flowing in.
It effectively prevents well casing tilting and sand inrush, ensures effective dewatering depth, improves the dewatering effect of the foundation pit, and avoids pump blockage.
Smart Images
Figure CN223824214U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of construction dewatering technology, specifically to a bottom-sealing well pipe. Background Technology
[0002] Well casing dewatering is widely used in water conservancy engineering construction, especially suitable for geological conditions with confined water head and sand layers.
[0003] Before open excavation, the groundwater level should be lowered to at least 0.5m below the excavation surface. Several dewatering wells should be drilled according to the dewatering depth and range to drain the foundation pit. The success of the dewatering well construction depends on the quality of the sealing of the bottom of the well pipe. If the bottom of the well is not sealed or if measures such as filling with filter material are not adopted, it is easy to cause the well pipe to tilt, sand to flow in, water pump to become clogging, the effective dewatering depth to decrease, and the dewatering effect of the foundation pit to be affected. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a bottom-sealing well casing, which solves the problem of poor water dewatering effect of well casings.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A bottom-sealing well casing, the bottom-sealing well casing comprising: a bottom section well casing, a sealing wooden board, and several anchoring steel bars;
[0007] The anchoring steel bar includes: a connecting section and an anchoring section; the connecting section is connected and fixed to the capping wooden board, the capping wooden board covers the bottom end of the bottom section of the well pipe, and the anchoring section is accommodated inside the bottom section of the well pipe;
[0008] A concrete layer is poured inside the bottom section of the well pipe, and the anchoring steel bars are embedded in the concrete layer.
[0009] Preferably, the connecting section is threaded, and the cover wood has mounting holes that correspond one-to-one with the anchoring steel bars. The diameter of the connecting section is less than the diameter of the mounting hole, which is less than the diameter of the anchoring section. The connecting section passes through the mounting hole and is threadedly connected to the nut.
[0010] Preferably, the anchoring steel bars are arranged in a circumferential array along the central axis of the cover wooden board.
[0011] Preferably, the sealing wood board is a round wood board with a thickness of 30mm and a diameter of 780mm.
[0012] Preferably, two wooden strips are fixed to the bottom surface of the cover board, and the two wooden strips form a limiting groove in the diameter direction of the cover board. The limiting groove is used to limit the rope used for hoisting.
[0013] Preferably, the width and height of the limiting groove are both 30mm.
[0014] Preferably, the anchoring steel bar is 250mm long and the connecting section is 50mm long.
[0015] Preferably, the concrete layer height is 300mm.
[0016] Preferably, the exposed portion of the sealing wood board is coated with an emulsified asphalt coating.
[0017] This utility model provides a bottom sealing well casing. Compared with the prior art, it has the following advantages:
[0018] In this utility model, a sealing board is installed at the bottom end of the bottom section well pipe. The sealing board is anchored to the concrete layer poured inside the bottom section well pipe by anchoring steel bars, which strengthens the sealing effect of the bottom section well pipe, effectively avoids the situation of well pipe tilting and sand inrush causing water pump blockage, and ensures the effective depth of dewatering and the dewatering effect of the foundation pit. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is an axial cross-sectional view of the bottom sealing well pipe in an embodiment of this utility model.
[0021] Figure 2 This is a bottom view of the sealing well pipe in an embodiment of this utility model.
[0022] The attached diagram is labeled as follows: 1. Bottom section well pipe; 2. Covering wooden board; 3. Anchoring steel bar; 4. Concrete layer; 5. Wooden strip; 6. Limiting groove. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0024] This application provides a bottom-sealing well casing, which solves the problem of poor water dewatering effect of well casing.
[0025] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.
[0026] Example:
[0027] like Figure 1 , Figure 2 As shown, this utility model provides a bottom sealing well pipe, which includes: a bottom section well pipe 1, a sealing wooden board 2, and several anchoring steel bars 3;
[0028] The anchoring steel bar 3 includes a connecting section and an anchoring section; the connecting section is connected and fixed to the capping wooden board 2, the capping wooden board 2 covers the bottom end of the bottom section well pipe 1, and the anchoring section is accommodated inside the bottom section well pipe 1;
[0029] A concrete layer 4 is poured inside the bottom section well pipe 1, and the anchoring steel bars 3 are embedded inside the concrete layer 4, so that the cover wooden board 2 is tightly connected to the bottom section well pipe 1.
[0030] like Figure 1 , Figure 2 As shown, the connecting section is threaded, and the cover wood 2 has mounting holes that correspond one-to-one with the anchoring steel bars 3. The diameter of the connecting section is less than the diameter of the mounting hole and less than the diameter of the anchoring section. After the connecting section passes through the mounting hole, it is threadedly connected to the nut to achieve the connection and fixation between the connecting section and the cover wood 2.
[0031] like Figure 2 As shown, the anchoring steel bars 3 are arranged in a circular array along the central axis of the cover wooden board 2.
[0032] like Figure 2 As shown, the sealing wood board 2 is a round wood board with a thickness of 30mm and a diameter of 780mm.
[0033] like Figure 1 , Figure 2 As shown, two wooden strips 5 are fixed to the bottom surface of the cover board 2. The two wooden strips 5 form a limiting groove 6 in the diameter direction of the cover board 2. The limiting groove 6 is used to limit the rope used for hoisting and prevent the rope from slipping off the bottom of the cover board 2.
[0034] The width and height of the limiting slot 6 are both 30mm.
[0035] The anchoring steel bar 3 is 250mm long and the connecting section is 50mm long.
[0036] The concrete layer has a height of 300mm for the fourth layer.
[0037] The exposed portion of the cover wood board 2 is coated with an emulsified asphalt coating.
[0038] In summary, compared with the prior art, the present invention has the following beneficial effects:
[0039] In this embodiment of the utility model, a sealing board 2 is installed at the bottom end of the bottom section well pipe 1. The sealing board 2 is anchored to the concrete layer 4 poured inside the bottom section well pipe 1 by anchoring steel bars 3, which strengthens the sealing effect of the bottom section well pipe 1, effectively avoids the situation of well pipe tilting and sand inrush causing water pump blockage, and ensures the effective depth of dewatering and the dewatering effect of the foundation pit.
[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0041] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A bottom-sealing well casing, characterized in that, The bottom sealing well casing includes: a bottom section well casing (1), a sealing wooden board (2), and several anchoring steel bars (3); The anchoring steel bar (3) includes: a connecting section and an anchoring section; the connecting section is connected and fixed to the capping wooden board (2), the capping wooden board (2) covers the bottom end of the bottom section well pipe (1), and the anchoring section is accommodated inside the bottom section well pipe (1); A concrete layer (4) is poured inside the bottom section well pipe (1), and the anchoring steel bars (3) are embedded in the concrete layer (4).
2. The bottom sealing well casing as described in claim 1, characterized in that, The connecting section is threaded, and the cover wood (2) has mounting holes that correspond one-to-one with the anchoring steel bars (3). The diameter of the connecting section is less than the diameter of the mounting hole and less than the diameter of the anchoring section. After the connecting section passes through the mounting hole, it is threadedly connected to the nut.
3. The bottom sealing well casing as described in claim 1, characterized in that, The anchoring steel bars (3) are arranged in a circular array along the central axis of the cover board (2).
4. The bottom sealing well casing as described in claim 1, characterized in that, The cover board (2) is a round wooden board with a thickness of 30mm and a diameter of 780mm.
5. The bottom sealing well casing as described in claim 1, characterized in that, Two wooden strips (5) are fixed to the bottom surface of the cover board (2). The two wooden strips (5) form a limiting groove (6) in the diameter direction of the cover board (2). The limiting groove (6) is used to limit the rope used for hoisting.
6. The bottom sealing well casing as described in claim 5, characterized in that, The width and height of the limiting slot (6) are both 30mm.
7. The bottom sealing well casing as described in claim 1, characterized in that, The anchoring steel bar (3) is 250mm long and the connecting section is 50mm long.
8. The bottom sealing well casing as described in claim 1, characterized in that, The concrete layer (4) has a height of 300mm.
9. The bottom sealing well casing as described in any one of claims 1-8, characterized in that, The exposed portion of the cover wood board (2) is coated with an emulsified asphalt coating.