Water pumping structure of drainage well

Abstract

The utility model discloses a water pumping structure of an unwatering well, which comprises a foundation slab, a water pump and a water pump, the water collecting well is arranged on the lower layer of the foundation slab and is filled with a filter material; the sealing pipe is inserted into the foundation slab and the filter material of the water collecting well, a water stop ring is arranged on the side wall, extending into the foundation slab, of the sealing pipe and used for preventing water in the water collecting well from seeping outwards along a gap between the outer wall of the sealing pipe and the foundation slab, a plurality of through holes are formed in the side wall, extending into the filter material, of the sealing pipe, and the upper end of the sealing pipe extends out of the groove; through the arrangement, the drainage pump and the water pipe can be rapidly drawn out of the sealing pipe, and the sealing pipe with the small diameter and the foundation bottom plate with the reserved groove are rapidly and tightly plugged. Due to the fact that the diameter of the sealing pipe is small, water can be further prevented and leakage can be further prevented on the basis of the water stop ring in a waterproof layer return wrapping mode. According to the scheme, operation is convenient, construction is easy, the water suction pump does not need to be buried into the bottom during plugging, and materials are saved.

Description

Technical Field

[0001] The utility model relates to the field of building structure construction, in particular to a water pumping structure for a drainage well. Background Art

[0002] During the excavation of deep foundation pits, when the groundwater level is higher than the base of the proposed building, it is necessary to take measures to dewater or intercept the water in the foundation pit to drain the groundwater below the working surface of the foundation pit. After the dewatering work is completed, the dewatering well needs to be sealed later, otherwise the hollow structure of the dewatering well will affect the bearing capacity of the foundation. The sealing is generally done by pouring concrete and then sealing the reserved well pipe.

[0003] Existing foundation bottom plate drainage wells generally use sand pipes or steel casings that match the inner diameter of the drainage well for dewatering. During the dewatering process, a water pump is placed in the drainage well. However, this approach has the following problems:

[0004] (1) When the foundation slab is closed at a later stage, the waterproof layer may not be tightly sealed, resulting in the risk of water leakage.

[0005] (2) The diameter of the drainage well is too large, which makes it difficult to seal it on site. The quality of the sealing is difficult to ensure, which may easily cause the risk of bottom plate leakage in the future.

[0006] (3) When plugging the drainage well, water is pumped out while plugging, which makes the construction difficult. In addition, the pump cannot be removed after plugging, resulting in serious waste of resources.

[0007] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0008] The utility model aims to provide a water pumping structure for a dewatering well which can solve the above-mentioned problem.

[0009] In order to achieve the above object, the utility model provides a water pumping structure for a drainage well, comprising:

[0010] A foundation base plate with a groove on the top; a water collection well arranged in the lower layer of the foundation base plate and filled with filter material; a sealing pipe inserted into the filter material of the foundation base plate and the water collection well, the side wall of the sealing pipe extending into the foundation base plate is provided with a water stop ring for preventing the water in the water collection well from seeping out along the gap between the outer wall of the sealing pipe and the foundation base plate, the side wall extending into the filter material is provided with a plurality of through holes, the upper end of the sealing pipe extends out of the groove; and a self-priming pump, a suction pipe of which extends from the upper end of the sealing pipe for pumping water from the water collection well.

[0011] In one or more embodiments, the diameter of the water collection well is in the range of 300-600 mm, and the diameter of the sealing pipe is in the range of 60-140 mm.

[0012] In one or more embodiments, the sealing tube is wrapped with a filter screen on the outside, and another layer of filter screen is fixed on the inner wall, and the diameter of the pores of the filter screen is smaller than the diameter of the filter material.

[0013] In one or more embodiments, a waterproof layer is arranged between the water collection well and the foundation bottom plate to prevent water leakage in the water collection well. The waterproof layer is wrapped back to the lower side of the water stop ring, and a clamp is provided on the wrapped waterproof layer to seal the waterproof layer and prevent water leakage.

[0014] In one or more embodiments, a waterproof protective layer is provided between the waterproof layer and the base bottom plate to protect the waterproof layer, and a basic cushion layer is provided between the waterproof layer and the water collection well.

[0015] In one or more embodiments, the top opening of the sealing tube is located above the bottom surface of the groove and below the top surface of the base bottom plate.

[0016] In one or more embodiments, the upper opening of the sealing tube is provided with a structure cooperating with a thread plug.

[0017] In one or more embodiments, the inner wall of the groove is roughened to increase the bonding strength of the cement surface.

[0018] In one or more embodiments, the bottom of the water pipe is close to the bottom of the sealing pipe, which facilitates the water pump to pump water from the bottom of the sealing pipe. The bottom of the sealing pipe is close to the bottom of the water collection well, which facilitates the liquid at the bottom of the water collection well to enter the sealing pipe through the opening on the sealing pipe.

[0019] The utility model provides a pumping structure for a drainage well. By setting a sealing pipe with a diameter much smaller than the inner diameter of the drainage well, reserving a groove on the foundation bottom plate, and placing the drainage pump outside the sealing pipe, the drainage pump and the water pipe can be quickly drawn out of the sealing pipe, and the sealing pipe with a smaller diameter and the foundation bottom plate with a reserved groove can be quickly and tightly sealed on site. Since the sealing pipe has a small diameter, it can be further waterproofed and leak-proofed on the basis of the water stop ring by returning the waterproof layer. This solution is easy to operate and simple to construct. When sealing, there is no need to bury the pump together, thus saving materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a water pumping structure of a dewatering well provided in an embodiment of the utility model.

[0021] Description of main reference numerals:

[0022] 1-foundation bottom plate, 11-groove, 2-water collection well, 3-filter material, 4-sealing pipe, 41-water stop ring, 42-through hole, 43-first filter screen, 5-self-priming pump, 51-suction pipe, 6-waterproof layer, 7-hoop, 8-waterproof protective layer, 9-foundation cushion layer. DETAILED DESCRIPTION

[0023] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0024] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0025] The existing foundation slab drainage well usually uses a sand pipe or steel casing with the same inner diameter as the drainage well for dewatering, and a water pump is placed in the drainage well to pump water. Due to the thicker pipe diameter, it takes a lot of time to seal the steel casing, and the steel casing filled with concrete needs to be further sealed by welding steel plates before pouring the foundation slab. The steps are complicated and on-site sealing is difficult, which can easily cause water leakage in the slab at a later stage. Since the sealing is slow, continuous pumping is required during the sealing process, which makes the construction difficult, and the water pump needs to be sealed in the steel pipe at the same time, resulting in serious waste of resources. When closing the raft, the waterproof layer has holes at the steel pipe, which leads to poor sealing and easy leakage.

[0026] This application makes plugging quick and convenient by reserving grooves and using small-diameter steel pipes. Small-diameter steel pipes require less fillers. After the steel pipes are filled, the steel pipes are further plugged by using a thread plugging method. After the steel pipes are plugged, it is only necessary to fill the reserved grooves to complete the entire plugging process. No additional pouring of the foundation slab is required. The plugging process is rapid, not easy to cause water leakage in the slab, and easy to operate. The ordinary water pump is replaced with a self-priming pump, which does not need to be sunk to the bottom of the pipe and can be placed outside the steel pipe to pump water. Due to the small diameter of the pipe, the plugging is rapid, and the self-priming pump does not need to be pumped at the same time during the plugging. Therefore, the plugging can be performed after the pump pipe is pulled out to reduce material waste. The waterproof layer is wrapped back under the water stop ring, and the waterproof layer is closed with a clamp to ensure waterproof performance. The water stop ring further prevents water leakage.

[0027] Embodiment 1:

[0028] like Figure 1As shown, the pumping structure of the drainage well according to the preferred embodiment of the utility model includes: a basic bottom plate 1, a groove 11 is opened on the top of which; a water collection well 2, which is arranged in the lower layer of the basic bottom plate 1 and is filled with filter material 3; a sealing pipe 4, which is inserted into the filter material 3 of the basic bottom plate 1 and the water collection well 2, and the side wall of the sealing pipe 4 extending into the basic bottom plate 1 is provided with a water stop ring 41, which is used to prevent the water in the water collection well from seeping out along the gap between the outer wall of the sealing pipe 4 and the basic bottom plate 1, and the side wall extending into the filter material 3 is provided with a plurality of through holes 42, and the upper end of the sealing pipe extends out of the groove 11; and a self-priming pump 5, whose suction pipe 51 extends from the upper end of the sealing pipe 4, for pumping water from the inside of the water collection well 3.

[0029] Specifically, since the foundation slab 11 is poured in advance and the groove 11 is reserved, when plugging, it is only necessary to fill the groove 11 to achieve the plugging of the sealing pipe 4, without the need for additional pouring of the foundation slab 1. The operation is convenient and fast, and it is not easy to leak. The function of the filter material 3 is to filter the liquid in the water collection well 2, fill the gap between the water collection well 2 and the sealing pipe 4, and fix the sealing pipe 4. The side wall of the sealing pipe 4 extending into the filter material 3 is provided with a plurality of through holes 42, and the liquid filtered by the filter material 3 enters the sealing pipe 4 through the through holes 42. The bottom of the sealing pipe 4 is located in the water collection well 2, the upper end seeps out of the groove 11, and the middle part is located in the foundation slab 1. The self-priming pump 5 is located outside the sealing pipe 4, and water can be pumped without the pump body being sunk into the well.

[0030] As an optional implementation, the diameter of the water collection well 2 is in the range of 300-600 mm, and the diameter of the sealing pipe 4 is in the range of 60-140 mm.

[0031] Specifically, the diameter of the sealing pipe 4 is smaller than the diameter of the existing sealing pipe, and much smaller than the diameter of the water collection well 2. By reducing the diameter of the sealing pipe 4, it is convenient to complete the plugging of the sealing pipe 4 more quickly during the landfill stage. When closing the sealing pipe 4, there is no need to use steel pipe welding, and a wire plug can be used directly for plugging.

[0032] As an optional implementation, the sealing tube 4 is wrapped with a first filter screen 43 on the outside, and a second filter screen 44 (not shown) is fixed to the inner wall. The diameters of the pores of the first filter screen 43 and the second filter screen 44 are smaller than the diameter of the filter material.

[0033] Specifically, the pore diameters of the first filter screen 43 and the second filter screen 44 are smaller than the diameter of the filter material, and are used to further filter the impurities that the filter material 3 filled in the water collection well 2 fails to filter, and intercept the filter material to prevent it from falling into the sealing tube 4 through the through holes on the sealing tube. As a preferred embodiment, the pore size of the second filter screen 44 is smaller than that of the first filter screen 43, and is used to further intercept the filter material to prevent the first filter screen 43 from being damaged and causing the filter material to enter the sealing tube. The first filter screen 43 is outside the sealing tube 4, and the second filter screen 44 is inside the sealing tube 4, with a distance of the side wall of the sealing tube 4 in between, to prevent the two layers of filter screens from being too close to each other, causing blockage and affecting each other's filtering effect. As a preferred embodiment, the second filter screen 44 and the inside of the sealing tube 4 are fixed by welding.

[0034] As an optional embodiment, a waterproof layer 6 is arranged between the water collection well 2 and the foundation slab 1 to prevent water leakage in the water collection well 2. The waterproof layer 6 is wrapped back to the lower side of the water stop ring 41. A clamp 7 is provided on the wrapped waterproof layer 6 to seal the waterproof layer 6 to prevent water leakage.

[0035] Specifically, the sealing tube 4 protrudes out of the plane of the waterproof layer 6, destroying the integrity of the originally integrated waterproof layer 6. In order to prevent the liquid from leaking from the gap between the waterproof layer 6 and the sealing tube 4, the waterproof layer 6 needs to be wrapped back, that is, the waterproof layer 6 is tightly attached to the side wall of the sealing tube 4, and is closed with a clamp 7 to prevent water leakage. The waterproof layer 6 is wrapped back to the lower side of the water stop ring 41, and the water stop ring 41 can further prevent the liquid from leaking outward through the gap between the base bottom plate 1 and the sealing tube 4.

[0036] As an optional implementation, a waterproof protective layer 8 is provided between the waterproof layer 6 and the base bottom plate 1 to protect the waterproof layer 6 , and a base cushion layer 9 is provided between the waterproof layer 6 and the water collection well 2 .

[0037] Specifically, the waterproof protective layer 8 is used to prevent the waterproof layer 6 from being damaged during the pouring of the foundation slab 1. After the foundation cushion layer 9 is poured, the waterproof layer 6 is pasted on the foundation cushion layer 9, and then the waterproof protective layer 8 is poured. The foundation cushion layer 9 can provide a working surface for waterproof construction.

[0038] As an optional implementation, the top opening of the sealing tube 4 is located above the bottom surface of the groove 11 and below the top surface of the base bottom plate 1 .

[0039] Specifically, the top opening of the sealing pipe 4 is located below the top surface of the foundation bottom plate 1, so that after the sealing pipe 4 is sealed, the reserved groove 11 can be poured to achieve complete sealing of the sealing pipe 4, and the operation is convenient and fast.

[0040] As an optional implementation, the upper opening of the sealing tube 4 is adapted to fit with a thread plug.

[0041] Specifically, the sealing tube 4 is provided with a structure that cooperates with a screw plug. When the raft is closed later, the sealing tube 4 is first closed with a screw plug, and then the groove 11 is poured. The screw plugging is faster and more convenient than the welding steel plate and other methods in the prior art, but it is only applicable to the sealing tube 4 with a small diameter. As a preferred embodiment, the structure that cooperates with the screw plug on the upper opening of the sealing tube 4 is a pipe clamp.

[0042] As an optional implementation, the inner wall of the groove 11 is roughened to increase the bonding strength of the cement surface.

[0043] Specifically, the inner wall of the groove 11 is roughened, so that when the foundation slab 1 is closed later, the newly poured concrete and the pre-cast side wall of the groove 11 can be more closely combined to prevent liquid from leaking from the gap between the new and old concrete.

[0044] As an optional embodiment, the bottom of the water pipe is close to the bottom of the sealing pipe 4, which is convenient for the water pump to pump water from the bottom of the sealing pipe 4. The bottom of the sealing pipe 4 is close to the bottom of the water collection well 2, which is convenient for the liquid at the bottom of the water collection well 2 to enter the sealing pipe 4 through the opening on the sealing pipe 4.

[0045] Specifically, the opening at the bottom of the water suction pipe 51 extends into the bottom of the sealing pipe 4 , and the bottom of the sealing pipe 4 is close to the bottom of the water collection well 2 , so that the water pump can fully pump out the accumulated water in the water collection well 2 .

[0046] Embodiment 2:

[0047] Taking a certain project as an example, the specific construction process of the drainage well plugging construction node of the utility model is introduced below:

[0048] The water collection well of this project has a well depth of 1000mm, a diameter of 400mm, and a sealing pipe diameter of 100mm.

[0049] Step 1: Drill holes at intervals of 50 mm in the wall of the lower half of the sealing pipe and insert it into the water collection well; fill the water collection well with filter material to fix the sealing pipe; lay a basic cushion layer above the wellhead filled with filter material; lay a waterproof layer on the flattened basic cushion layer and wrap the waterproof layer back onto the outer wall of the sealing pipe; lay a waterproof protective layer on the waterproof layer, with the top of the wrapped waterproof layer higher than the waterproof protective layer. During this process, the self-priming pump extends into the bottom of the sealing pipe to continuously pump out the accumulated water in the water collection well.

[0050] Step 2: Pull out the self-priming pump and weld the sealing steel plate at the sealing pipe mouth; close the waterproof layer; pour the foundation slab and leave a 300*200mm groove.

[0051] Step 3: Open the closed waterproof layer; remove the sealing steel plate, insert the self-priming pump to continue pumping water; install the pipe clamp on the top of the sealing pipe, install the water stop ring on the pipe wall inside the foundation bottom plate, and add a clamp to the waterproof layer under the water stop ring.

[0052] Step 4: Roughen the surface around the groove to facilitate the close combination of the newly poured concrete and the groove; pull out the self-priming pump; fill the sealing pipe with micro-expansive concrete; after filling with concrete, plug the sealing pipe mouth with a thread plug that matches the pipe clamp; finally, fill the groove with micro-expansive concrete to complete the sealing.

[0053] The foregoing description of specific exemplary embodiments of the utility model is for the purpose of illustration and illustration. These descriptions are not intended to limit the utility model to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the utility model and various different options and changes. The scope of the utility model is intended to be defined by the claims and their equivalents.

Claims

1. A pumping structure for a dewatering well, characterized in that: include: A base plate, the top of which is provided with a groove; A water collection well, which is arranged in the lower layer of the foundation slab and filled with filter material; A sealing pipe is inserted into the base bottom plate and the filter material of the water collection well. The side wall of the sealing pipe extending into the base bottom plate is provided with a water stop ring to prevent the water in the water collection well from leaking outward along the gap between the outer wall of the sealing pipe and the base bottom plate. The side wall extending into the filter material is provided with a plurality of through holes. The upper end of the sealing pipe extends out of the groove; and A self-priming pump, whose water suction pipe extends from the upper end of the sealing pipe, is used to pump water from the inside of the water collection well.

2. The pumping structure for a dewatering well according to claim 1, characterized in that: The diameter of the water collection well ranges from 300 to 600 mm, and the diameter of the sealing pipe ranges from 60 to 140 mm.

3. The pumping structure for a dewatering well according to claim 1, characterized in that: The sealing tube is wrapped with a filter screen on the outside, and another layer of filter screen is fixed on the inner wall. The diameter of the pores of the filter screen is smaller than the diameter of the filter material.

4. The pumping structure for a dewatering well according to claim 1, characterized in that: A waterproof layer is arranged between the water collection well and the foundation bottom plate to prevent water leakage in the water collection well. The waterproof layer is wrapped back to the lower side of the water stop ring, and a clamp is provided on the wrapped waterproof layer to seal the waterproof layer and prevent water leakage.

5. The water pumping structure for a dewatering well according to claim 4, characterized in that: A waterproof protective layer is arranged between the waterproof layer and the base bottom plate to protect the waterproof layer, and a base cushion layer is arranged between the waterproof layer and the water collection well.

6. The water pumping structure for a dewatering well according to claim 1, characterized in that: The top opening of the sealing tube is located above the bottom surface of the groove and below the top surface of the base bottom plate.

7. The water pumping structure for a dewatering well according to claim 1, characterized in that: The upper opening of the sealing tube is matched with the thread plug.

8. The water pumping structure for a dewatering well according to claim 1, characterized in that: The inner wall of the groove is roughened to increase the bonding force of the cement surface.

9. The water pumping structure for a dewatering well according to claim 1, characterized in that: The bottom of the suction pipe is close to the bottom of the sealing pipe, which is convenient for the water pump to pump water from the bottom of the sealing pipe. The bottom of the sealing pipe is close to the bottom of the water collection well, which is convenient for the liquid at the bottom of the water collection well to enter the sealing pipe through the opening on the sealing pipe.

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