Foundation pit dewatering well later-stage plugging structure

Abstract

The utility model provides a later plugging structure for a foundation pit dewatering well. The later plugging structure is used in cooperation with a dewatering pipe. And the dewatering pipe is inserted into the dewatering well. Comprising a sealing pipe and a plugging plate. The downcast pipe is sleeved with the sealing pipe, and the top of the downcast pipe is lower than the top of the sealing pipe. A connecting ring protrudes out of the outer wall of the top of the sealing pipe. The plugging plate is placed on the upper portion of the connecting ring and welded to the connecting ring. When the later plugging structure of the foundation pit dewatering well is used for plugging a well mouth, the sealing pipe is sleeved outside the dewatering pipe and is fixed; and then a bottom plate of the foundation pit can be poured outside the sealing pipe. And the sealing pipe is fixed in the bottom plate of the foundation pit. And then, concrete is poured into the sealing pipe, so that the sealing pipe is blocked by the concrete. And finally, the sealing plate is welded to the top of the sealing pipe, so that the opening of the sealing pipe can be better sealed.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit construction, in particular to a late-stage plugging structure for a foundation pit dewatering well. Background Art

[0002] In order to prevent groundwater from entering the foundation pit during foundation pit construction, precipitation measures are generally taken. Precipitation through precipitation wells is one of the methods. After the foundation pit construction is completed, the precipitation wells need to be sealed to isolate the groundwater from the inside of the foundation pit to prevent groundwater from entering the foundation pit. The sealing density of the precipitation wells determines the waterproof effect of the foundation pit. Therefore, an efficient and stable precipitation well sealing structure is urgently needed. Utility Model Content

[0003] The utility model aims to provide a late-stage plugging structure for a foundation pit dewatering well, which can well plug the dewatering well.

[0004] The embodiments of the present invention are implemented by the following technical solutions:

[0005] A late-stage plugging structure for a foundation pit dewatering well, used in conjunction with a dewatering pipe; the dewatering pipe is plugged into the dewatering well; it comprises a sealing pipe and a sealing plate; the sealing pipe is sleeved on the outside of the dewatering pipe and the top of the dewatering pipe is lower than the top of the sealing pipe; a connecting ring is protruding from the top outer wall of the sealing pipe; the sealing plate is placed on the upper part of the connecting ring and welded to the connecting ring.

[0006] Furthermore, a water stop ring is provided on the middle outer wall of the sealing tube; the water stop ring is ring-shaped.

[0007] Furthermore, an annular sealing strip is sleeved on the outside of the sealing tube; the sealing strip is attached to the outer wall of the sealing tube and the upper part of the water stop ring.

[0008] Furthermore, a waterproof layer is provided on the outside of the sealing tube; the waterproof layer is laid around the sealing tube and wrapped around the outer wall of the sealing tube.

[0009] Furthermore, the waterproof layer is a waterproof coiled material; the waterproof coiled material is connected to the outside of the sealing tube through a clamp.

[0010] Furthermore, the interior of the sealing tube is filled with micro-expansive concrete.

[0011] Furthermore, the sealing tube is externally cast with a foundation pit bottom plate, and the bottom surface of the foundation pit bottom plate is higher than the top surface height of the sealing tube; a sealing paste is provided on the top of the sealing plate; a waterproof mortar is provided around the sealing plate and between the foundation pit bottom plate; the tops of the waterproof mortar and the sealing paste are both flush with the foundation pit bottom plate.

[0012] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0013] When the late-stage plugging structure of the foundation pit dewatering well of the utility model is used to plug the wellhead, the sealing pipe is firstly sleeved on the outside of the dewatering pipe and the sealing pipe is fixed. Then the bottom plate of the foundation pit can be poured outside the sealing pipe. The sealing pipe is fixed inside the bottom plate of the foundation pit. Then, concrete is poured into the sealing pipe so that the concrete blocks the sealing pipe. Finally, the plugging plate is welded to the top of the sealing pipe to better block the opening of the sealing pipe.

[0014] The sealing tube is blocked due to the pouring of concrete inside the sealing tube. In order to better seal, a sealing plate is welded on the top of the sealing tube, thereby better ensuring the sealing effect. Since the connecting ring protrudes from the outer wall of the sealing tube, the sealing tube is welded to the sealing plate through the connecting ring. As a result, the sealing plate can be placed above the connecting ring and supported by the connecting ring during welding, so that the sealing plate can be better positioned during welding and is easy to operate. In addition, the wall thickness of the sealing tube is relatively small, which can better protect the tube wall and prevent the tube wall from being damaged during welding compared to the direct welding of the sealing plate to the tube wall of the sealing tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of the later-stage plugging structure of the foundation pit dewatering well of the utility model;

[0017] Figure 2 for Figure 1 Enlarged view of point a in the middle.

[0018] Icons: 1-downpipe, 2-sealing pipe, 3-sealing plate, 4-connecting ring, 5-waterstop ring, 6-sealing strip, 7-waterproof layer, 8-hoop, 9-foundation pit bottom plate, 10-sealing paste, 11-waterproof mortar. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Example:

[0021] like Figure 1 and Figure 2 As shown, the utility model provides a late-stage plugging structure of a foundation pit drainage well, which is used in conjunction with a drainage pipe 1. When the foundation pit is constructed below the groundwater level, groundwater easily enters the interior of the foundation pit, thereby affecting the construction. Therefore, a drainage well is designed. The drainage well is excavated downward and is located below the bottom surface of the foundation pit, so that groundwater is collected inside the drainage well. The accumulated water in the drainage well can be pumped out by a water pump to prevent groundwater from overflowing into the interior of the foundation pit. In order to avoid the collapse of the well wall of the drainage well, a pipe is generally inserted into the drainage well to protect the well wall. This pipe is the drainage pipe 1. The plugging structure includes a sealing pipe 2 and a plugging plate 3. The pipe mouth of the drainage pipe 1 is generally higher than the bottom surface of the foundation pit. After the ground of the foundation pit is completely arranged, concrete needs to be poured on the bottom surface of the foundation pit to form a foundation pit bottom plate 9. Before pouring, the sealing pipe 2 is sleeved on the outside of the drainage pipe 1 and the sealing pipe 2 is placed on the bottom surface of the foundation pit. After pouring concrete, the sealing pipe 2 is fixed inside the foundation pit bottom plate 9. The top of the downcomer 1 is lower than the top of the sealing pipe 2. A connecting ring 4 is protruding from the top outer wall of the sealing pipe 2. The shape of the connecting ring 4 is the same as that of the flange. The sealing plate 3 is placed on the upper part of the connecting ring 4 and welded to the connecting ring 4.

[0022] When the late-stage plugging structure of the foundation pit dewatering well of the utility model is used to plug the wellhead, the sealing pipe 2 is firstly put on the outside of the dewatering pipe 1 and the sealing pipe 2 is fixed. Then the bottom plate of the foundation pit can be poured outside the sealing pipe 2. So that the sealing pipe 2 is fixed inside the bottom plate of the foundation pit. Then, concrete is poured into the sealing pipe 2 so that the concrete blocks the sealing pipe 2. Finally, the plugging plate 3 is welded to the top of the sealing pipe 2 to better block the opening of the sealing pipe 2.

[0023] Due to the pouring of concrete inside the sealing tube 2, the sealing tube 2 is blocked. In order to better block, a blocking plate 3 is welded on the top of the sealing tube 2, thereby better ensuring the blocking effect. Since the connecting ring 4 protrudes from the outer wall of the sealing tube 2, the sealing tube 2 is welded to the blocking plate 3 through the connecting ring 4. As a result, the blocking plate 3 can be placed above the connecting ring 4 and supported by the connecting ring 4 during welding, so that the blocking plate 3 is better positioned during welding and easy to operate. In addition, the wall thickness of the sealing tube 2 is relatively small, which can better protect the wall of the tube compared to the direct welding of the blocking plate 3 to the wall of the sealing tube 2, thereby preventing the wall of the tube from being damaged during welding.

[0024] In the present embodiment, a water stop ring 5 is provided on the middle outer wall of the sealing pipe 2. The water stop ring 5 is ring-shaped. After the precipitation well is blocked, groundwater cannot penetrate into the foundation pit through the inside of the sealing pipe 2. However, groundwater may still penetrate through the gap between the outer wall of the sealing pipe 2 and the foundation pit bottom plate 9. If the outer wall of the sealing pipe 2 is flat, the distance that the seepage water passes through the outer wall of the sealing pipe 2 is short, and the probability of seepage is higher. After the water stop ring 5 is set, the seepage water needs to flow along the outer wall of the water stop ring 5 when passing through the outer wall of the sealing pipe 2, which extends the seepage path and requires multiple turns during seepage, thereby increasing the difficulty of seepage. In addition, the provision of the water stop ring 5 also makes the sealing pipe 2 more integrated with the foundation pit bottom plate 9, and the connection is more stable. The waterproof effect is better.

[0025] In this embodiment, the outer part of the sealing tube 2 is also provided with an annular sealing strip 6. The sealing strip 6 is attached to the outer wall of the sealing tube 2 and the upper part of the water stop ring 5. The sealing strip 6 has better waterproof performance. If the seepage reaches the sealing strip 6, it can also be well waterproofed by the sealing strip 6.

[0026] In this embodiment, a waterproof layer 7 is also provided on the outside of the sealing tube 2. Figure 1 As shown, the waterproof layer 7 is laid around the sealing tube 2 and wrapped around the outer wall of the sealing tube 2. The waterproof layer 7 is a waterproof roll. The sealing tube 2 is waterproofed around the waterproof roll, so that it is difficult for groundwater to reach the sealing tube 2, and it is even more difficult to seep through the outer wall of the sealing tube 2. The waterproof roll is connected to the outside of the sealing tube 2 through a clamp 8. The clamp 8 can evenly apply a compressive force to the waterproof roll from all sides, so that the waterproof roll fits tightly to the sealing tube 2. So as to better ensure the waterproof effect.

[0027] In this embodiment, the interior of the sealing tube 2 is filled with micro-expansive concrete. The foundation pit bottom plate 9 is poured outside the sealing tube 2, and the bottom surface of the foundation pit bottom plate 9 is higher than the top surface height of the sealing tube 2. A sealing paste 10 is provided on the top of the sealing plate 3. A waterproof mortar 11 is provided between the surrounding of the sealing plate 3 and the foundation pit bottom plate 9. The tops of the waterproof mortar 11 and the sealing paste 10 are both flush with the foundation pit bottom plate 9. These measures can better ensure the sealing effect.

[0028] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A late-stage plugging structure for a foundation pit dewatering well, used in conjunction with a dewatering pipe (1); the dewatering pipe (1) is plugged into the dewatering well; characterized in that: It comprises a sealing pipe (2) and a sealing plate (3); the sealing pipe (2) is sleeved on the outside of the downcomer (1) and the top of the downcomer (1) is lower than the top of the sealing pipe (2); a connecting ring (4) is protruding from the top outer wall of the sealing pipe (2); the sealing plate (3) is placed on the upper part of the connecting ring (4) and welded to the connecting ring (4).

2. The late-stage plugging structure for foundation pit dewatering well according to claim 1 is characterized by: A water stop ring (5) is provided on the middle outer wall of the sealing tube (2); the water stop ring (5) is ring-shaped.

3. The late-stage plugging structure for foundation pit dewatering well according to claim 2 is characterized by: The outside of the sealing tube (2) is also sleeved with an annular sealing strip (6); the sealing strip (6) is attached to the outer wall of the sealing tube (2) and the upper part of the water stop ring (5).

4. The late-stage plugging structure for the foundation pit dewatering well according to claim 3 is characterized by: The outside of the sealing tube (2) is also provided with a waterproof layer (7); the waterproof layer (7) is laid around the sealing tube (2) and wrapped around the outer wall of the sealing tube (2).

5. The late-stage plugging structure for foundation pit dewatering well according to claim 4 is characterized in that: The waterproof layer (7) is a waterproof coiled material; the waterproof coiled material is connected to the outside of the sealing tube (2) via a clamp (8).

6. The late-stage plugging structure for the foundation pit dewatering well according to claim 5 is characterized by: The interior of the sealing tube (2) is filled with micro-expansive concrete.

7. The late-stage plugging structure for the foundation pit dewatering well according to claim 6 is characterized by: The sealing pipe (2) is externally cast with a foundation pit bottom plate (9), and the bottom surface of the foundation pit bottom plate (9) is higher than the top surface height of the sealing pipe (2); a sealing paste (10) is arranged on the top of the sealing plate (3); a waterproof mortar (11) is arranged around the sealing plate (3) and between the foundation pit bottom plate (9); the tops of the waterproof mortar (11) and the sealing paste (10) are both flush with the foundation pit bottom plate (9).

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