Synchronous precipitation plugging structure

Abstract

This utility model belongs to the field of dewatering well sealing technology, and particularly to a synchronous dewatering sealing structure, including a foundation pit body. A steel sleeve is installed at the bottom of the foundation pit body, and the bottom of the steel sleeve extends below the foundation pit body. This synchronous dewatering sealing structure absorbs residual groundwater within the steel sleeve by filling it with a first layer of sand and gravel. Then, a layer of crushed stone is filled on top of the first sand and gravel layer, and the first sand and gravel layer is compacted to ensure the tightness of the filling inside the steel sleeve. A filter layer is then filled to further filter the groundwater that has seeped into the steel sleeve, allowing the sediment in the groundwater to be better retained below the foundation pit. Finally, a second layer of sand and gravel and a concrete layer are sequentially filled into the extended sleeve to seal it. This design ensures both the tightness of the soil and water within the dewatering well and the tight filling and sealing of the dewatering well, improving the structural stability of the foundation pit and the buildings above it.

Description

Technical Field

[0001] This utility model relates to the field of dewatering well sealing technology, specifically to a synchronous dewatering sealing structure. Background Technology

[0002] In the early stages of construction, a foundation pit needs to be excavated. Due to the depth of the pit, groundwater can seep into it, affecting construction. To ensure a dry construction environment inside the pit, dewatering wells need to be drilled at the bottom. Water pumps are placed in these wells to extract the groundwater. As the pit and the building above are constructed, the area around the dewatering wells needs to be extended and sealed to prevent groundwater from entering the pit. After the construction is completed, the inside and top of the dewatering wells need to be filled and sealed to prevent groundwater from overflowing. Therefore, perfecting the sealing structure of the synchronous dewatering wells is an essential part of the foundation pit construction process.

[0003] Patent CN220414298U discloses a dewatering well sealing structure, comprising: a steel sleeve, suitable for vertical installation on a base plate and connected to groundwater; an inflatable bladder, installed inside the steel sleeve and sealed to the inner wall of the steel sleeve; a sealing element, wrapped around the periphery of the inflatable bladder and sealed to the inner wall of the steel sleeve; a concrete layer, filling the steel sleeve and located above the inflatable bladder; and a sealing cap, sealing the top of the steel sleeve. This design solves the problem of poor sealing performance in existing dewatering well sealing structures, which affects the sealing effect. However, the aforementioned sealing structure, which fills the steel sleeve with an inflatable bladder, has several drawbacks. First, it is difficult to absorb groundwater that subsequently seeps into the steel sleeve, causing groundwater to accumulate and compress the inflatable bladder, potentially damaging it. Second, the inflatable bladder itself has low density and is a monolithic structure, resulting in poor pressure resistance. If leakage occurs, it can easily lead to soil erosion at the location of the inflatable bladder, affecting the overall stability of the foundation pit and the buildings above. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a synchronous precipitation sealing structure, which solves the current problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a synchronous precipitation sealing structure, comprising a foundation pit body, a steel sleeve installed at the bottom of the foundation pit body, the bottom of the steel sleeve extending to the bottom of the foundation pit body, the top of the steel sleeve extending to the interior of the foundation pit body, an extension sleeve snapped onto the top of the steel sleeve, a sealing ring welded to the top of the extension sleeve, a sealing plate snapped onto the top of the sealing ring, a first sand and gravel layer filling the bottom of the inner side of the steel sleeve, a crushed stone layer filling the inner side of the steel sleeve and above the first sand and gravel layer, a filter layer installed on the top of the crushed stone layer and at the bottom of the inner side of the extension sleeve, a second sand and gravel layer filling the interior of the extension sleeve and above the filter layer, a concrete layer filling the interior of the extension sleeve and above the second sand and gravel layer, and a dry cement layer filling the top of the concrete layer and above the sealing ring.

[0006] As a preferred embodiment of this utility model, the outer side of the lower half of the steel sleeve is provided with water-permeable holes evenly distributed from top to bottom, and the outer side of the steel sleeve is filled with filter sand.

[0007] As a preferred embodiment of this utility model, a connecting ring is welded to the bottom of the extension sleeve, and the connecting ring is snapped into the inside of the steel sleeve.

[0008] As a preferred embodiment of this utility model, the thickness of the top of the connecting collar is greater than that of the extension sleeve, the filter layer is composed of sandbags filled with dry sand, the overall structure of the filter layer is closely fitted with the interior of the extension sleeve, and the bottom of the filter layer is fitted with the top of the connecting collar.

[0009] As a preferred embodiment of this utility model, the sealing plate has a T-shaped cross-section, the side of the sealing plate is tightly fitted with the inner side of the sealing ring, and the bottom of the sealing plate is tightly fitted with the top of the dry cement layer.

[0010] In a preferred embodiment of this invention, the connection between the concrete layer and the second aggregate layer is a mutual permeation connection, and the dry cement layer is filled after the concrete layer has solidified.

[0011] As a preferred embodiment of this utility model, the steel sleeve and the extension sleeve have the same outer diameter and are both installed perpendicularly to the bottom surface of the foundation pit body.

[0012] Compared with the prior art, this utility model provides a synchronous precipitation sealing structure, which has the following beneficial effects:

[0013] 1. This synchronous dewatering sealing structure absorbs residual groundwater within the steel sleeve by filling it with a first layer of sand and gravel. A layer of crushed stone is then added on top of the first layer of sand and gravel, and the first layer is compacted to ensure the tightness of the filling inside the steel sleeve. A filter layer is then added to further filter the groundwater that has seeped into the steel sleeve, allowing the sediment in the groundwater to be better retained below the foundation pit, improving the water and soil tightness below the pit. Subsequently, a second layer of sand and gravel and a concrete layer are sequentially filled into the extension sleeve to seal it. This design ensures both the water and soil tightness within the dewatering well and the tight filling and sealing of the dewatering well, improving the structural stability of the foundation pit and the buildings above.

[0014] 2. This synchronous dewatering sealing structure, through the design of the filter layer, can slow down the upward infiltration rate of groundwater, providing time for the concrete layer to solidify. On the other hand, the filter layer can further filter the groundwater inside the steel sleeve, ensuring that the sediment in the groundwater is retained inside the steel sleeve, thereby improving the tightness of the bottom structure of the dewatering well. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the steel sleeve and the extension sleeve of this utility model;

[0017] Figure 3 This utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0018] Figure 4 This is an enlarged schematic diagram of the structure near the sealing plate of this utility model.

[0019] In the diagram: 1. Main body of the foundation pit; 2. Steel sleeve; 21. Water permeable hole; 3. Extension sleeve; 31. Connecting collar; 4. Sealing collar; 5. Sealing plate; 6. Filter sand and gravel; 7. First sand and gravel layer; 8. Crushed stone layer; 9. Filter layer; 10. Second sand and gravel layer; 11. Concrete layer; 12. Dry cement layer. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1

[0022] Please see Figure 1-4 In this implementation scheme: the synchronous precipitation sealing structure includes a foundation pit body 1, a steel sleeve 2 installed at the bottom of the foundation pit body 1, the bottom of the steel sleeve 2 extending to the bottom of the foundation pit body 1, the top of the steel sleeve 2 extending to the interior of the foundation pit body 1, an extension sleeve 3 snapped onto the top of the steel sleeve 2, a sealing ring 4 welded onto the top of the extension sleeve 3, a sealing plate 5 snapped onto the top of the sealing ring 4, a first sand and gravel layer 7 filled at the bottom inside the steel sleeve 2, a crushed stone layer 8 filled inside the steel sleeve 2 and above the first sand and gravel layer 7, a filter layer 9 installed on the top of the crushed stone layer 8 and at the bottom inside the extension sleeve 3, a second sand and gravel layer 10 filled inside the extension sleeve 3 and above the filter layer 9, a concrete layer 11 filled inside the extension sleeve 3 and above the second sand and gravel layer 10, and a dry cement layer 12 filled above the concrete layer 11 and above the sealing ring 4.

[0023] Groundwater seeps into the steel sleeve 2 and is pumped away by an external water pump. As the foundation pit is constructed, an extension sleeve 3 and a sealing ring 4 are installed on top of the steel sleeve 2. When sealing the dewatering wells after the foundation pit is completed, a first layer of sand and gravel 7 is first filled into the steel sleeve 2 to absorb the remaining groundwater. Then, a layer of crushed stone 8 is filled on top of the first layer of sand and gravel 7, and the first layer of sand and gravel 7 is compacted to ensure the tightness of the filling inside the steel sleeve 2. Finally, a filter layer 9 is filled to further filter the groundwater that has seeped into the steel sleeve 2, making the groundwater... The silt in the water can be better retained below the foundation pit, improving the water and soil tightness below the foundation pit. Then, the second sand and gravel layer 10 and the concrete layer 11 are filled into the extension sleeve 3 in sequence to seal the extension sleeve 3. After the concrete layer 11 dries and solidifies, the dry cement layer 12 is filled to improve the tightness of the dewatering well sealing. Finally, the sealing plate 5 is sealed above the sealing ring 4 to complete the sealing work of the dewatering well. This design can not only ensure the water and soil tightness in the dewatering well, but also tightly fill and seal the dewatering well, improving the structural stability of the foundation pit and the building above it.

[0024] In a preferred embodiment, the lower half of the steel sleeve 2 has evenly distributed permeable holes 21 on its outer side, arranged from top to bottom. The outer side of the steel sleeve 2 is filled with filter sand 6. After the dewatering well is excavated, filter sand 6 is first filled around the bottom of the dewatering well, and then the steel sleeve 2 is inserted into the well, so that the filter sand 6 encloses the lower half of the steel sleeve 2. Groundwater that seeps into the steel sleeve 2 in this way will first be filtered by the filter sand 6, retaining the sediment components of the groundwater outside the dewatering well, thus preventing severe soil erosion around the dewatering well and affecting the stability of the foundation pit bottom.

[0025] In a preferred embodiment, a connecting ring 31 is welded to the bottom of the extension sleeve 3. The connecting ring 31 is snapped into the inside of the steel sleeve 2 to improve the tightness of the connection between the extension sleeve 3 and the steel sleeve 2.

[0026] Example 2

[0027] Please see Figure 1-4 In this embodiment: the thickness of the top of the connecting collar 31 is greater than that of the extension sleeve 3. The filter layer 9 is composed of sandbags filled with dry sand. The overall structure of the filter layer 9 is closely fitted with the interior of the extension sleeve 3, and the bottom of the filter layer 9 is fitted with the top of the connecting collar 31. Over time, groundwater will gradually seep upward. The design of the filter layer 9 can slow down the upward seepage of groundwater, providing time for the concrete layer 11 to solidify. On the other hand, the filter layer 9 can further filter the groundwater in the steel sleeve 2, ensuring that the sediment in the groundwater remains in the steel sleeve 2, thereby improving the tightness of the bottom structure of the dewatering well.

[0028] In a preferred embodiment, the sealing plate 5 has a T-shaped cross-section, the side of the sealing plate 5 is tightly fitted with the inner side of the sealing ring 4, and the bottom of the sealing plate 5 is tightly fitted with the top of the dry cement layer 12, thereby improving the sealing effect of the top of the extension sleeve 3.

[0029] In a preferred embodiment, the connection between the concrete layer 11 and the second aggregate layer 10 is a mutual permeation connection, and the dry cement layer 12 is filled after the concrete layer 11 has solidified. This ensures the rapid solidification of the concrete layer 11, and the bonding between the dry cement layer 12 and the concrete layer 11 improves the overall structural tightness.

[0030] As a preferred embodiment, the steel sleeve 2 and the extension sleeve 3 have the same outer diameter and are both installed vertically to the bottom surface of the foundation pit body 1, thereby ensuring the orderly infiltration of groundwater during the foundation pit construction process and improving the flatness of the bottom structure of the foundation pit.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A synchronous dewatering sealing structure, comprising the main body of the foundation pit (1), characterized in that: A steel sleeve (2) is installed at the bottom of the foundation pit body (1). The bottom of the steel sleeve (2) extends to the bottom of the foundation pit body (1), and the top of the steel sleeve (2) extends into the interior of the foundation pit body (1). An extension sleeve (3) is snapped onto the top of the steel sleeve (2). A sealing ring (4) is welded to the top of the extension sleeve (3), and a sealing plate (5) is snapped onto the top of the sealing ring (4). The bottom of the inner side of the steel sleeve (2) is filled with a first layer of sand and gravel (7). A crushed stone layer (8) is filled inside and above the first sand and gravel layer (7). A filter layer (9) is installed on the top of the crushed stone layer (8) and at the bottom of the inner side of the extension sleeve (3). A second sand and gravel layer (10) is filled inside the extension sleeve (3) and above the filter layer (9). A concrete layer (11) is filled inside the extension sleeve (3) and above the second sand and gravel layer (10). A dry cement layer (12) is filled above the concrete layer (11) and above the sealing ring (4).

2. The synchronous precipitation blocking structure according to claim 1, characterized in that: The lower half of the steel sleeve (2) has water-permeable holes (21) evenly distributed from top to bottom on the outer side, and the outer side of the steel sleeve (2) is filled with filter sand (6).

3. The synchronous precipitation blocking structure according to claim 1, characterized in that: The bottom of the extension sleeve (3) is welded with a connecting collar (31), which is snapped into the inside of the steel sleeve (2).

4. The synchronous precipitation blocking structure according to claim 3, characterized in that: The thickness of the top of the connecting collar (31) is greater than that of the extension sleeve (3). The filter layer (9) is composed of sandbags filled with dry sand. The overall structure of the filter layer (9) is closely fitted with the interior of the extension sleeve (3), and the bottom of the filter layer (9) is fitted with the top of the connecting collar (31).

5. The synchronous precipitation blocking structure according to claim 1, characterized in that: The sealing plate (5) has a T-shaped cross-section. The side of the sealing plate (5) is tightly fitted with the inner side of the sealing ring (4), and the bottom of the sealing plate (5) is tightly fitted with the top of the dry cement layer (12).

6. The synchronous precipitation blocking structure according to claim 1, characterized in that: The connection between the concrete layer (11) and the second sand and gravel layer (10) is a mutual permeable connection, and the dry cement layer (12) is filled after the concrete layer (11) has solidified.

7. The synchronous precipitation blocking structure according to claim 1, characterized in that: The steel sleeve (2) and the extension sleeve (3) have the same outer diameter and are installed perpendicular to the bottom surface of the foundation pit body (1).

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