A sump local dewatering structure

Abstract

The application relates to a water collecting pit local precipitation structure and belongs to the technical field of precipitation construction. The water collecting pit local precipitation structure comprises a water collecting pit arranged at the bottom of a foundation pit, a water collecting outer pipe sunk to the lower side of the water collecting pit, a precipitation inner pipe inserted into the inner cavity of the water collecting outer pipe, a water guide flower pipe laid on the bottom surface of the water collecting pit and communicated with the inner cavity of the water collecting outer pipe, a concrete cushion layer laid on the inner side surface of the water collecting pit, and a precipitation pump for draining accumulated water in the precipitation inner pipe; the inner cavity of the water collecting outer pipe is filled with water passing material; the precipitation inner pipe is provided with a water guide part arranged in the inner cavity of the water collecting outer pipe and a precipitation part arranged on the upper side of the water collecting outer pipe, and the precipitation part is provided with a precipitation cavity for arranging the precipitation pump. The application has the effects of enhancing the precipitation capacity of the water collecting pit and rapidly reducing the accumulated water in the water collecting pit.

Description

Technical Field

[0001] This application relates to the field of dewatering construction, and in particular to a local dewatering structure for a sump pit. Background Technology

[0002] In recent years, with the continuous development of construction technology, the depth of building foundation pits has increased accordingly, and the groundwater level has also risen with the increase in pit depth. Effective dewatering measures can lower the groundwater level, reduce the soil moisture content, thereby enhancing the soil's bearing capacity and avoiding problems such as foundation pit collapse and ground settlement caused by groundwater buoyancy and seepage, greatly improving the safety and durability of building projects. As a common drainage method in building construction, the dewatering efficiency and sealing procedures of sump pits are key factors affecting the construction period.

[0003] Chinese utility model patent CN209669902U discloses a basic sump drainage system. This sump drainage method primarily utilizes a pre-installed steel pipe within a drainage pit at the bottom of the sump. The top of the steel pipe has a wing ring with drainage holes, and the lower pipe wall has seepage holes. A drainage pipe is inserted inside, and a filter layer is laid around it. When a small amount of surface water seeps out within the sump area, it enters the steel pipe through the seepage holes, and a self-priming pump is activated to pump the water to the outside of the sump.

[0004] Regarding the aforementioned technologies, due to the limited seepage rate of steel pipes, when a large amount of groundwater accumulates, the drainage pipes cannot promptly drain the water from the sump, causing subsequent construction to be impossible and affecting the construction period. Utility Model Content

[0005] In order to enhance the dewatering capacity of the sump and quickly reduce the water accumulation in the sump, this application provides a local dewatering structure for the sump.

[0006] The technical solution for a localized dewatering structure for a sump pit provided in this application is as follows: A localized dewatering structure for a sump pit includes a sump pit at the bottom of a foundation pit, an outer sump pipe submerged below the sump pit, a dewatering inner pipe with its bottom end inserted into the inner cavity of the outer sump pipe, a water-guiding pipe laid on the bottom surface of the sump pit and communicating with the inner cavity of the outer sump pipe, a concrete pad layer laid on the inner surface of the sump pit, and a dewatering pump for draining accumulated water from the inner dewatering pipe; the inner cavity of the outer sump pipe is filled with a water-permeable material; the inner dewatering pipe has a water-guiding section arranged in the inner cavity of the outer sump pipe and a dewatering section arranged on the upper side of the outer sump pipe, the dewatering section having a dewatering chamber for accommodating the dewatering pump.

[0007] By adopting the above technical solution, when the groundwater level rises below the foundation pit, the groundwater outside the outer collection pipe can enter the outer collection pipe through the guide pipe. The water level inside the outer collection pipe gradually rises and enters the dewatering chamber of the inner dewatering pipe. By starting the dewatering pump, the accumulated water in the inner dewatering pipe can be discharged, thus realizing the function of local dewatering of the sump. In particular, by setting up the guide pipe, the accumulated water at the bottom of the sump can be quickly guided into the outer collection pipe, improving the dewatering efficiency of the sump.

[0008] Optionally, the water guide pipe has an inlet section arranged on the bottom surface of the water collection pit and an outlet section connected to the inlet section and inserted into the outer water collection pipe; the lower arc surface of the inlet section is evenly distributed with permeable holes penetrating the inner and outer surfaces.

[0009] By adopting the above technical solution, the permeable holes on the lower arc surface of the water-conducting flower pipe facilitate the rapid collection of surrounding overflowing groundwater, which is then directly discharged into the water collection pipe and discharged through a dewatering pump, thereby improving the water collection efficiency.

[0010] Optionally, the top of the outer water collection pipe has an annular gap located outside the inner rainwater pipe; the top surface of the outer water collection pipe is also provided with a first sealing part for sealing and covering the annular gap.

[0011] By adopting the above technical solution, the annular gap is sealed and covered by the first sealing part, preventing groundwater from overflowing from the annular gap and interfering with normal precipitation work, ensuring the stable progress of the precipitation process, and also facilitating the subsequent sealing construction process.

[0012] Optionally, the inner rainwater pipe is a steel pipe; the bottom of the inner rainwater pipe is circumferentially welded with reinforcing bars arranged in the concrete cushion layer.

[0013] By adopting the above technical solutions, using steel pipes as the inner pipes for rainwater can improve their structural strength and durability. Welding reinforcing bars in the circumferential direction inside the concrete cushion layer can enhance the connection stability between the inner pipes for rainwater and the concrete cushion layer, making the structure more stable and reliable.

[0014] Optionally, a waterproof layer is laid on the top surface of the concrete cushion layer, the waterproof layer having through holes for the arrangement of the inner rainwater pipe, the waterproof layer including a roll layer and a protective layer arranged on the upper side of the roll layer; a sealing structure is provided between the inner rainwater pipe and the waterproof layer.

[0015] By adopting the above technical solution, the rolled material layer can play a waterproof role. Laying a waterproof layer including the rolled material layer on the top surface of the concrete foundation can prevent water penetration, and the upper protective layer protects the rolled material layer and extends its service life. Setting a sealing structure between the inner dewatering pipe and the waterproof layer can further enhance the sealing performance, reduce the possibility of water seeping out from the joint between the two, and improve the waterproof performance of the local dewatering structure of the sump pit.

[0016] Optionally, the sealing structure includes a waterproof sleeve connected to the roll material layer and fitted onto the outer wall of the inner rainwater pipe, and a water-stop ring fixed to the outer wall of the inner rainwater pipe and arranged on the upper side of the waterproof sleeve.

[0017] By adopting the above technical solution, the waterproof sleeve in the sealing structure is connected to the roll material layer and sleeved on the outer wall of the inner rainwater pipe. The water-stop ring is fixed on the outer wall of the inner rainwater pipe and on the upper side of the waterproof sleeve, which further enhances the sealing between the inner rainwater pipe and the waterproof layer and prevents water from leaking from the connection between the two.

[0018] Optionally, the input end of the rainwater pump is connected to a pumping pipe, and the end of the pumping pipe is inserted into the water-passing material of the outer water collection pipe; a filter end cap is installed at the end of the pumping pipe.

[0019] By adopting the above technical solution, the end of the pumping pipe is inserted into the water-passing material of the outer water collection pipe, which helps to fix the pumping pipe, enhances the stability of the rainwater pump's drainage, makes the accumulated water drain more timely, and enhances the rainwater removal effect. The filter end cap can prevent impurities from entering the pumping pipe and affecting the pumping effect when the water is quickly discharged.

[0020] Optionally, the top of the inner rainwater pipe is also equipped with a cover steel plate for covering the upper opening of the inner rainwater pipe.

[0021] By adopting the above technical solution, when the drainage of the sump is completed, the cover steel plate can be directly used to seal the top opening of the inner pipe of the rainwater, which facilitates construction and also has the function of preventing water from overflowing and seeping out, thus avoiding affecting the subsequent construction process and the stability of the project.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. A localized dewatering structure for a sump pit, which, through the combination of a sump pit, an outer sump pipe, an inner dewatering pipe, a water guide pipe, and a dewatering pump, can quickly drain the accumulated water in the sump pit area, reduce the amount of water accumulating in the pit, enhance the dewatering effect of the sump pit, and realize the function of localized dewatering in the sump pit; 2. The water guide pipe can collect all the water in the sump and guide it into the external sump pipe, realizing the effective collection and discharge of water in the sump, improving drainage efficiency, reducing the impact on construction, and ensuring the construction safety of the foundation pit. 3. The concrete cushion layer, waterproof layer, sealing structure, and first sealing part can prevent the infiltration of groundwater, enhance the waterproof performance of the overall dewatering structure, and further reduce the impact of moisture on the foundation pit structure and construction project. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the local dewatering structure of the sump pit in an embodiment of this application.

[0024] Figure 2 This is a schematic diagram showing the combination of the outer water collection pipe, the inner rainwater pipe, and the water guide pipe in the embodiments of this application.

[0025] Figure 3 This is a schematic diagram of the cooperation between the inner rainwater pipe and the outer water collection pipe in the embodiments of this application.

[0026] Figure 4 This is a cross-sectional structural diagram of the water guide pipe in an embodiment of this application.

[0027] Figure 5 This is a schematic diagram of the fit between the inner rainwater pipe and the cover steel plate in an embodiment of this application.

[0028] Explanation of reference numerals in the attached drawings: 1. Sump; 2. Outer sump pipe; 21. Water-passing material; 22. First sealing part; 3. Inner dewatering pipe; 31. Water guide section; 32. Dewatering section; 33. Dewatering chamber; 331. Installation platform; 34. Reinforcing steel bar; 4. Water guide flower pipe; 41. Inlet section; 42. Outlet section; 43. Water-permeable hole; 5. Concrete cushion layer; 51. First concrete cushion layer; 52. Second concrete cushion layer; 6. Waterproof layer; 61. Roll material layer; 611. Waterproof sleeve; 62. Protective layer; 7. Dewatering pump; 71. Pumping pipe; 72. Drainage pipe; 73. Filter end cap; 8. Water-stop ring; 9. Cover steel plate. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0030] This application discloses a localized dewatering structure for a sump pit. (Refer to...) Figure 1A local dewatering structure for a sump pit 1 includes a sump pit 1 located at the bottom of the foundation pit, an outer sump pipe 2 submerged below the sump pit 1, a dewatering inner pipe 3 with its bottom end inserted into the inner cavity of the outer sump pipe 2, a water-guiding pipe 4 laid on the bottom surface of the sump pit 1 and connected to the outer sump pipe 2, a concrete cushion layer 5 laid on the inner surface of the sump pit 1, and a dewatering pump 7 for draining the accumulated water in the dewatering inner pipe 3. When the groundwater level below the foundation pit rises, groundwater outside the outer sump pipe 2 can enter the outer sump pipe 2 through the water-guiding pipe 4. The water level in the outer sump pipe 2 gradually rises and enters the dewatering chamber 33 of the dewatering inner pipe 3. By activating the dewatering pump 7, the accumulated water in the dewatering inner pipe 3 can be drained, thereby realizing the function of local dewatering of the sump pit 1.

[0031] Reference Figure 1 The external water collection pipe 2 is a cement pipe for dewatering, and it is vertically arranged in the sand layer below the water collection pit 1. The inner cavity of the external water collection pipe 2 is filled with a water-passing material 21. In this embodiment, the water-passing material 21 is sand and gravel.

[0032] Reference Figure 2 and Figure 3 The inner rainwater pipe 3 is made of steel. The outer diameter of the inner rainwater pipe 3 is smaller than the inner diameter of the outer water collection pipe 2, so that after the bottom end of the inner rainwater pipe 3 is inserted into the outer water collection pipe 2, the top of the outer water collection pipe 2 has an annular gap located outside the inner rainwater pipe 3. The inner rainwater pipe 3 and the outer water collection pipe 2 are arranged coaxially. The inner rainwater pipe 3 includes a water guiding section 31 arranged inside the outer water collection pipe 2 and a rainwater section 32 arranged on the upper side of the outer water collection pipe 2. The rainwater section 32 has a rainwater chamber 33 for accommodating the rainwater pump 7.

[0033] Reference Figure 3 To reduce the probability of groundwater leakage through the annular gap between the inner rainwater pipe 3 and the outer water collection pipe 2, a first sealing part 22 is provided on the top surface of the outer water collection pipe 2 to seal the annular gap. The first sealing part 22 is an annular sealing part and is made of silicone weather-resistant sealant.

[0034] Reference Figure 2 and Figure 3 To enhance the installation strength of the inner rainwater pipe 3 within the sump 1, reinforcing steel bars 34, arranged within the concrete cushion layer 5, are welded circumferentially to the bottom of the inner rainwater pipe 3. In this embodiment, there are eight reinforcing steel bars 34, which are arranged horizontally and evenly circumferentially on the outer wall of the inner rainwater pipe 3.

[0035] Reference Figure 2 and Figure 4The water guide pipe 4 is a metal pipe. The water guide pipe 4 includes an inlet section 41 located on the bottom surface of the water collection pit 1 and an outlet section 42 connected to the inlet section 41 and inserted into the outer water collection pipe 2. The inlet section 41 is horizontally arranged, and its lower arc surface is evenly distributed with water-permeable holes 43 penetrating both the inner and outer surfaces. The outlet section 42 is vertically arranged and seals through the first sealing part 22. In this embodiment, there are eight water guide pipes 4, which are evenly arranged circumferentially around the axis of the outer water collection pipe 2.

[0036] Reference Figure 1 and Figure 2 The concrete cushion layer 5 is made of permeable concrete and includes a first concrete cushion layer 51 laid on the bottom surface of the sump 1 and a second concrete cushion layer 52 laid on the inner wall of the sump 1. A waterproof layer 6 is also laid on the inner surface of the concrete cushion layer 5. The waterproof layer 6 has through holes for arranging the inner drainage pipe 3. The waterproof layer 6 includes a roll material layer 61 and a protective layer 62 disposed on the upper side of the roll material layer 61. In this embodiment, the roll material layer 61 is made of waterproof roll material, and the protective layer 62 is lightweight concrete used to fix the roll material layer 61 to the concrete cushion layer 5.

[0037] Reference Figure 2 A sealing structure is provided between the inner rainwater pipe 3 and the waterproof layer 6. The sealing structure includes a waterproof sleeve 611 connected to the roll material layer 61 and fitted over the outer wall of the inner rainwater pipe 3, and a water-stop ring 8 fixed to the outer wall of the inner rainwater pipe 3 and positioned on the upper side of the waterproof sleeve 611. The waterproof sleeve 611 is made of waterproof roll material, and its inner wall is bonded to the outer wall of the inner rainwater pipe 3 with waterproof adhesive. The height of the waterproof sleeve 611 is not less than 250 mm.

[0038] Reference Figure 2 An installation platform 331 is fixed inside the precipitation chamber 33 and welded to the inner wall of the inner precipitation pipe 3. A precipitation pump 7 is installed on the installation platform 331. The input end of the precipitation pump 7 is connected to a pumping pipe 71, the end of which is inserted into the water-passing material 21 of the outer water collection pipe 2, allowing the precipitation pump 7 to pump out and discharge the accumulated water in the outer water collection pipe 2. The output end of the precipitation pump 7 is connected to a drain pipe 72, the outlet end of which extends outside the foundation pit. A filter end cap 73 is also installed at the end of the pumping pipe 71 to reduce the probability of sand and gravel in the outer water collection pipe 2 clogging the precipitation pump 7.

[0039] Reference Figure 1 and Figure 5 After the foundation pit construction is completed, the dewatering pump 7 needs to be removed from the dewatering chamber 33 first, and then the sump pit 1 needs to be buried. The local dewatering structure of the sump pit 1 is also equipped with a cover steel plate 9 for covering the upper opening of the inner dewatering pipe 3. The cover steel plate 9 is welded and fixed to the top of the inner dewatering pipe 3.

[0040] Combination Figures 1 to 5 The implementation principle of this application embodiment is as follows: when the groundwater level on the lower side of the foundation pit rises, the groundwater on the bottom side of the sump pit 1 can be quickly introduced into the outer sump pipe 2 through the water guide pipe 4, and rise together with the water level in the outer sump pipe 2 into the dewatering chamber 33 of the inner dewatering pipe 3. Then, the water in the inner dewatering pipe 3 is discharged by the dewatering pump 7, thereby realizing the function of quickly reducing the water accumulation in the sump pit.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A sump local dewatering structure, characterized by, The system includes a sump pit (1) at the bottom of the foundation pit, an outer sump pipe (2) submerged in the lower side of the sump pit (1), a dewatering inner pipe (3) with its bottom end inserted into the inner cavity of the outer sump pipe (2), a water guide pipe (4) laid on the bottom surface of the sump pit (1) and connected to the outer sump pipe (2), a concrete pad layer (5) laid on the inner surface of the sump pit (1), and a dewatering pump (7) for draining the accumulated water in the dewatering inner pipe (3); the inner cavity of the outer sump pipe (2) is filled with a water-permeable material (21); the dewatering inner pipe (3) has a water guide part (31) arranged in the inner cavity of the outer sump pipe (2) and a dewatering part (32) arranged on the upper side of the outer sump pipe (2), and the dewatering part (32) has a dewatering chamber (33) for accommodating the dewatering pump (7).

2. A sump localised dewatering structure according to claim 1, wherein, The water guide pipe (4) has an inlet section (41) arranged on the bottom surface of the water collection pit (1) and an outlet section (42) connected to the inlet section (41) and inserted into the water collection outer pipe (2); the lower arc surface of the inlet section (41) is evenly distributed with water-permeable holes (43) penetrating the inner and outer surfaces.

3. The local dewatering structure for a water collection pit according to claim 2, characterized in that, The top of the water collection outer pipe (2) has an annular gap located outside the rainwater inner pipe (3); the top surface of the water collection outer pipe (2) is also provided with a first sealing part (22) for sealing and covering the annular gap.

4. The local dewatering structure for a water collection pit according to claim 1, characterized in that, The inner rainwater pipe (3) is a steel pipe; the bottom of the inner rainwater pipe (3) is welded with reinforcing steel bars (34) arranged in the concrete cushion layer (5).

5. The local dewatering structure for a water collection pit according to claim 1, characterized in that, A waterproof layer (6) is laid on the top surface of the concrete cushion layer (5). The waterproof layer (6) has a through hole for arranging the inner rainwater pipe (3). The waterproof layer (6) includes a roll layer (61) and a protective layer (62) arranged on the upper side of the roll layer (61). A sealing structure is provided between the inner rainwater pipe (3) and the waterproof layer (6).

6. The local dewatering structure for a water collection pit according to claim 5, characterized in that, The sealing structure includes a waterproof sleeve (611) connected to the roll layer (61) and sleeved on the outer wall of the inner rainwater pipe (3) and a water-stop ring (8) fixed to the outer wall of the inner rainwater pipe (3) and arranged on the upper side of the waterproof sleeve (611).

7. The local dewatering structure for a water collection pit according to claim 1, characterized in that, The input end of the rainwater pump (7) is connected to a pumping pipe (71), and the end of the pumping pipe (71) is inserted into the water-passing material (21) of the water collection pipe (2); a filter end cap (73) is installed at the end of the pumping pipe (71).

8. The local dewatering structure for a water collection pit according to claim 1, characterized in that, The top of the inner rainwater pipe (3) is also equipped with a cover steel plate (9) for covering the upper opening of the inner rainwater pipe (3).

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