Seepage guiding and drainage device for preventing clogging

Abstract

The utility model provides an anti-clogging seepage guide drainage device, which relates to the technical field of hydraulic engineering, is mounted on a bottom plate, an inverted filter layer and a foundation are arranged below the bottom plate, the inverted filter layer is positioned between the bottom plate and the foundation, and the anti-clogging seepage guide drainage device is characterized by comprising a drainage pipe, an expansion water stop rubber ring and gravel materials; the drainage pipe is inserted into a drainage hole which is reserved when the bottom plate is poured and is provided with a mounting notch; the gravel material is filled in the drainage pipe; the lower part of the drainage pipe is communicated with the inverted filter layer below the bottom plate; the replaceable drainage pipe is adopted, dredging and inverted filter layer dredging work is carried out after the replaceable drainage pipe is detached in the overhaul period, the drainage pipe is prevented from being damaged in the dredging process, and the problems that drainage holes are too long, inverted filter materials are difficult to dredge and the like are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy projects, in particular to a seepage and drainage device for preventing siltation. Background Art

[0002] In the anti-seepage and drainage design of water conservancy and hydropower projects, the layout principle of "blocking above and draining below" is usually followed. Whether the uplift pressure at the bottom of hydraulic structures can be dissipated is very important to the overall stability of the structure.

[0003] In the prior art, in order to reduce the uplift pressure on the foundation of hydraulic structures, a filter is generally set under the bottom plate of the sluice stilling pool and the pump station inlet pool, and drainage holes are arranged on the bottom plate to discharge underground seepage water in time, lower the groundwater level around the building, reduce the seepage water pressure, and improve the overall stability of the building.

[0004] However, due to the low position of the drainage holes, the upward opening of the holes, and the thin thickness of the filter material in the holes, the high-viscosity mud in the water body is deposited in large quantities on the bottom plate after standing, enters and blocks the drainage holes. Over time, a certain thickness of micro-permeable silt layer will be deposited on the bottom plate of the water inlet front pool or the energy dissipation pool, and the silt is difficult to be cleaned after entering the anti-filtration layer, resulting in poor drainage of the drainage holes or loss of drainage function, increasing the base uplift pressure and the anti-floating instability of the building. The engineering management unit needs to drain, desilt and unclog the drainage holes from time to time according to the clogging of the drainage holes to ensure that the drainage holes are unobstructed, which consumes a lot of manpower and material resources.

[0005] Therefore, a seepage and drainage device for preventing siltation is proposed. Utility Model Content

[0006] 1. Technical issues to be solved

[0007] In view of the deficiencies in the prior art, the utility model provides a seepage and drainage device for preventing siltation, which solves the problem that drainage holes at the base of hydraulic structures are easily clogged.

[0008] (II) Technical solution

[0009] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0010] In the utility model, the seepage and drainage device is installed on the bottom plate, and a filter layer and a foundation are arranged below the bottom plate, and the filter layer is located between the bottom plate and the foundation. The utility model is characterized in that the seepage and drainage device comprises a drainage pipe, an expansion water-stopping rubber ring and gravel material;

[0011] The drainage pipe is inserted into the drainage hole with installation notches reserved when the bottom plate is cast;

[0012] The gravel material is filled in the drainage pipe, and the lower part of the drainage pipe is connected with the filter layer below the bottom plate through the drainage hole;

[0013] The expansion water-stopping rubber ring is arranged between the outer periphery of the drainage pipe and the installation notch.

[0014] Furthermore, the upper part of the drainage pipe is covered with a permeable cover plate, and a plurality of drainage sieve holes are provided on the permeable cover plate, and the porosity of the drainage sieve holes is greater than 40%.

[0015] Furthermore, the drainage pipe is a cylindrical component with an inner diameter of 30 to 60 cm, a column wall thickness of 8 to 10 cm, a lower portion inserted into the bottom plate to a depth greater than 20 cm, and an upper portion protruding from the bottom plate to a depth of 30 to 50 cm.

[0016] Furthermore, the upper hole diameter of the drainage hole is 10 to 20 mm larger than the outer diameter of the drainage pipe, and the lower hole diameter is matched with the inner diameter of the drainage pipe.

[0017] Furthermore, a plurality of drain pipes are provided.

[0018] Furthermore, the drainage pipe and the permeable cover plate are prefabricated reinforced concrete structures.

[0019] Furthermore, the gravel material grading is the same as or one level higher than the grading of the upper layer of the filter layer below the bottom plate.

[0020] Furthermore, the nominal hardness of the expansion waterproof rubber ring is 30 (± 4) IRHD.

[0021] Furthermore, a support plate is provided inside the drain pipe, a plurality of seepage holes are opened on the support plate, the support plate and the permeable cover plate are connected by a connecting piece, and the support plate is slidably connected to the drain pipe.

[0022] Furthermore, a handle is provided on a side of the water-permeable cover plate away from the supporting plate.

[0023] (III) Beneficial effects

[0024] The utility model provides a seepage and drainage device for preventing siltation. Compared with the prior art, it has the following beneficial effects:

[0025] By installing a detachable drainage pipe in the drainage hole of the stilling pool or the front pool bottom plate, the drainage hole can be effectively prevented from being blocked by the silt layer formed by sediment deposition. The drainage pipe is filled with graded gravel to extend the anti-filtration drainage channel, which can prevent fine particles in the water flow on the bottom plate from directly entering through the drainage pipe and accumulating in the anti-filtration layer under the bottom plate, thereby extending the service life of the drainage pipe;

[0026] A replaceable drain pipe is used, which can be dismantled during maintenance to carry out silt removal and filter layer dredging work, thus avoiding damage to the drain pipe during silt removal and solving the problem of difficulty in dredging the filter material due to too long drain holes. The utility model has the advantages of simple structure, convenient construction and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a structural schematic diagram of a seepage and drainage device for preventing siltation during installation;

[0029] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0030] Figure 3 for Figure 1 A schematic structural diagram of another embodiment of a middle drainage pipe;

[0031] Figure 4 for Figure 3 A three-dimensional diagram of the middle drain pipe and the permeable cover when installed;

[0032] Figure 5 for Figure 4 Schematic diagram of the structure;

[0033] Figure 6 for Figure 5 Cross-section view of AA.

[0034] Reference numerals:

[0035] 1. Drain pipe; 2. Permeable cover plate; 21. Handle; 22. Connector; 23. Support plate; 3. Expandable water-stop rubber ring; 4. Gravel; 5. Bottom plate; 6. Drain hole; 7. Filter layer; 8. Foundation. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] The embodiment of the present application solves the problem that the drainage holes at the base of hydraulic structures are easily clogged by providing a seepage and drainage device for preventing siltation, thereby facilitating the reduction of the uplift pressure at the base of hydraulic structures.

[0038] The technical solution in the embodiment of the present application is to solve the above technical problems, and the overall idea is as follows:

[0039] When designing the solution, the main consideration is that the existing solutions have high time and labor costs, and how to use existing materials to improve the drainage device to reduce time and labor costs. Based on the above considerations, the inventor has studied a large number of existing engineering cases and found that after a long period of water storage and water discharge, the silt layer in the energy dissipation pool and the water inlet pool can reach a balanced thickness of erosion and siltation for water conservancy projects such as pump stations or culverts that are operating normally. This thickness is generally within the dynamic range of 10cm to 40cm, which causes the drainage holes to be easily blocked by silt, the anti-filter material near the drainage holes to be difficult to clear, and the drainage pipes to be damaged during the silt removal process. In view of the cause of its occurrence, an anti-blocking seepage drainage device is designed. By raising the elevation of the upper orifice of the drainage hole, the orifice is higher than the silt deposition layer. At the same time, the drainage pipe can be disassembled during the maintenance period to clean the anti-filter material inside the bottom plate, which solves the problems of the drainage holes being easily blocked by silt, the anti-filter material near the drainage holes to be difficult to clear, and the drainage pipes to be damaged during the silt removal process, thereby reducing time and labor costs.

[0040] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0041] Example:

[0042] like Figure 1-Figure 2 As shown, a seepage and drainage device for preventing siltation is arranged in a culvert stilling pool or a pump station water inlet fore pool and installed on a bottom plate 5. A filter layer 7 and a foundation 8 are arranged below the bottom plate 5. The filter layer 7 is located between the bottom plate 5 and the foundation 8. The seepage and drainage device includes a drainage pipe 1, an expansion water-stop rubber ring 3 and gravel material 4.

[0043] The drainage pipe 1 is inserted into the drainage hole 6 with installation notches reserved when the bottom plate 5 is cast;

[0044] The gravel material 4 is filled in the drainage pipe 1, and the lower part of the drainage pipe 1 is connected to the filter layer 7 below the bottom plate 5 through the drainage hole 6;

[0045] The expansion waterproof rubber ring 3 is arranged between the outer periphery of the drainage pipe 1 and the installation notch.

[0046] By providing a detachable drainage pipe 1 in the drainage hole 6 of the bottom plate 5 of the stilling pool or the water inlet front pool, the drainage hole 6 can be effectively prevented from being blocked by a silt layer formed by sediment deposition. The drainage pipe 1 is filled with graded gravel material 4 to extend the reverse filtration drainage channel, and fine particles in the water flow on the bottom plate 5 can be prevented from directly entering through the drainage pipe 1 and accumulating in the reverse filtration layer 7 at the bottom of the bottom plate 5, thereby extending the service life of the drainage pipe 1.

[0047] A replaceable drainage pipe 1 is adopted, which is disassembled during the maintenance period for dredging and unblocking of the filter layer 7, thereby avoiding damage to the drainage pipe 1 during the dredging process and solving the problem of difficulty in unblocking the filter material due to the overlong drainage hole 6. The utility model has the advantages of simple structure, convenient construction and high reliability.

[0048] The upper part of the drainage pipe 1 is covered with a water-permeable cover plate 2, and a plurality of drainage sieve holes are arranged on the water-permeable cover plate 2, and the porosity of the drainage sieve holes is greater than 40%.

[0049] By providing a water-permeable cover plate 2 on which a plurality of drainage sieve holes are arranged, the water-permeable cover plate 2 is used to preliminarily filter impurities contained in water passing through the drainage pipe 1, thereby reducing the replacement frequency of the drainage pipe 1.

[0050] The drainage pipe 1 is a cylindrical component with an inner diameter of 30 to 60 cm and a column wall thickness of 8 to 10 cm. The depth of the lower portion entering the bottom plate 5 is greater than 20 cm, and the upper portion is 30 to 50 cm higher than the bottom plate 5. The overall height is determined according to the mud content of the incoming water.

[0051] The upper aperture of the drainage hole 6 is 10-20 mm larger than the outer diameter of the drainage pipe 1 and is used for installing the expansion water-stop rubber ring 3 . The lower aperture is adapted to the inner diameter of the drainage pipe 1 .

[0052] The drainage pipe 1 is provided in plurality.

[0053] It should be noted that the total number of drainage holes 6 should meet the need for sufficient drainage. In principle, the total drainage area of ​​the drainage holes 6 is larger than the total area of ​​the drainage holes conventionally arranged on the bottom plate 5 .

[0054] The drainage pipe 1 and the permeable cover plate 2 are prefabricated reinforced concrete structures, the strength of the concrete is at least one grade higher than the strength of the bottom plate 5, and the strength grade of the concrete is higher than C30.

[0055] The grading of the gravel material 4 is the same as or one level higher than the grading of the upper layer of the filter layer 7 below the bottom plate 5 .

[0056] The nominal hardness of the expansion waterproof rubber ring 3 is 30 (± 4) IRHD.

[0057] When the flow cross-section is small, an array arrangement is adopted. When the flow cross-section is large, a plum blossom arrangement is adopted, thereby effectively reducing the water blocking area and facilitating the seepage and drainage work of hydraulic structures.

[0058] like Figure 3-Figure 6 As shown, a supporting plate 23 is provided inside the drain pipe 1 , and a plurality of seepage holes are opened on the supporting plate 23 . The supporting plate 23 and the permeable cover plate 2 are connected via a connecting piece 22 , and the supporting plate 23 is slidably connected to the drain pipe 1 .

[0059] By setting the supporting plate 23, the gravel material 4 placed in the drain pipe 1 is located between the supporting plate 23 and the permeable cover plate 2. When cleaning the drain pipe 1, there is no need to disassemble the drain pipe 1. It is only necessary to take the permeable cover plate 2 to drive the supporting plate 23 to slide along the inside of the drain pipe 1, thereby discharging the gravel material 4 inside the drain pipe 1 and replacing the gravel material 4 to achieve cleaning of the drain pipe 1.

[0060] A handle 21 is provided on one side of the water-permeable cover plate 2 away from the supporting plate 23 , and the handle 21 can facilitate pulling of the water-permeable cover plate 2 .

[0061] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0062] 1. By providing a detachable drainage pipe 1 in the drainage hole 6 of the bottom plate 5 of the stilling pool or the water inlet front pool, the drainage hole 6 can be effectively prevented from being blocked by the silt layer formed by sediment deposition. The drainage pipe 1 is filled with graded gravel 4 to extend the reverse filtration drainage channel, which can prevent fine particles in the water flow on the bottom plate 5 from directly entering through the drainage pipe 1 and accumulating in the reverse filtration layer 7 at the bottom of the bottom plate 5, thereby extending the service life of the drainage pipe 1;

[0063] A replaceable drainage pipe 1 is adopted, which is disassembled during the maintenance period for dredging and unblocking of the filter layer 7, thereby avoiding damage to the drainage pipe 1 during the dredging process and solving the problem of difficulty in unblocking the filter material due to the overlong drainage hole 6. The utility model has the advantages of simple structure, convenient construction and high reliability.

[0064] 2. By providing a permeable cover plate 2 with a plurality of drainage sieve holes, the permeable cover plate 2 is used to preliminarily filter impurities contained in the water passing through the drainage pipe 1, thereby reducing the replacement frequency of the drainage pipe 1.

[0065] 3. By setting the supporting plate 23, the gravel material 4 placed in the drain pipe 1 is located between the supporting plate 23 and the permeable cover plate 2. When cleaning the drain pipe 1, there is no need to disassemble the drain pipe 1. It is only necessary to take the permeable cover plate 2 to drive the supporting plate 23 to slide along the inside of the drain pipe 1, thereby discharging the gravel material 4 inside the drain pipe 1 and replacing the gravel material 4 to achieve cleaning of the drain pipe 1.

[0066] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0067] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A seepage and drainage device for preventing siltation, installed on a bottom plate (5), a filter layer (7) and a foundation (8) are arranged below the bottom plate (5), and the filter layer (7) is located between the bottom plate (5) and the foundation (8), characterized in that: The seepage and drainage device comprises a drainage pipe (1), an expansion water-stopping rubber ring (3) and gravel (4); The drainage pipe (1) is inserted into a drainage hole (6) with an installation notch reserved when the base plate (5) is cast; The gravel material (4) is filled in the drainage pipe (1), and the lower part of the drainage pipe (1) is connected to the filter layer (7) below the bottom plate (5) through the drainage hole (6); The expansion water-stopping rubber ring (3) is arranged between the outer periphery of the drainage pipe (1) and the installation notch.

2. A seepage and drainage device for preventing siltation according to claim 1, characterized in that: The upper part of the drainage pipe (1) is covered with a water-permeable cover plate (2), and the water-permeable cover plate (2) is provided with a plurality of drainage sieve holes, and the porosity of the drainage sieve holes is greater than 40%.

3. A seepage and drainage device for preventing siltation as claimed in claim 2, characterized in that: The drainage pipe (1) is a cylindrical component with an inner diameter of 30 to 60 cm and a column wall thickness of 8 to 10 cm. The depth of the lower portion inserted into the bottom plate (5) is greater than 20 cm, and the upper portion is 30 to 50 cm higher than the bottom plate (5).

4. A seepage and drainage device for preventing siltation as claimed in claim 3, characterized in that: The upper hole diameter of the drainage hole (6) is 10 to 20 mm larger than the outer diameter of the drainage pipe (1), and the lower hole diameter is matched with the inner diameter of the drainage pipe (1).

5. A seepage and drainage device for preventing siltation as claimed in claim 4, characterized in that: The drainage pipe (1) is provided in plurality.

6. A seepage and drainage device for preventing siltation as claimed in claim 5, characterized in that: The drainage pipe (1) and the permeable cover plate (2) are prefabricated reinforced concrete structures.

7. A seepage and drainage device for preventing siltation according to claim 6, characterized in that: The grading of the gravel material (4) is the same as or one level higher than the grading of the upper layer of the filter layer (7) below the bottom plate (5).

8. A seepage and drainage device for preventing siltation as claimed in claim 7, characterized in that: The nominal hardness of the expansion waterproof rubber ring (3) is 30 (±4) IRHD.

9. A seepage and drainage device for preventing siltation according to any one of claims 2 to 8, characterized in that: A support plate (23) is provided inside the drainage pipe (1), a plurality of seepage holes are provided on the support plate (23), the support plate (23) and the permeable cover plate (2) are connected via a connecting piece (22), and the support plate (23) is slidably connected to the drainage pipe (1).

10. A seepage and drainage device for preventing siltation according to claim 9, characterized in that: A handle (21) is provided on one side of the water-permeable cover plate (2) away from the supporting plate (23).

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