Construction method of adding check valve to channel lining

Abstract

This invention discloses a method for installing a check valve on a channel lining. It includes the following steps: cutting a rectangular hole at the location where the new check valve will be installed, with the shorter side of the hole longer than the diameter of the outer cylinder of the new check valve; installing a rectangular geomembrane repair plate, the shorter side of which is the same as the diagonal of the rectangular hole; inserting the shorter side of the rectangular geomembrane repair plate into the bottom of the rectangular hole along the diagonal, so that the rectangular geomembrane repair plate covers the rectangular hole; chiseling a tooling hole at the center of the rectangular geomembrane repair plate, the tooling hole matching the outer cylinder of the new check valve; inserting the outer cylinder of the new check valve into the tooling hole; and filling the gap between the outer cylinder of the new check valve and the rectangular hole with concrete. This invention achieves the goal of installing a check valve on an operating channel for the first time, effectively and promptly solving the problem of heave damage to the lining caused by high-pressure groundwater on the channel slope while the channel is operating normally without interrupting water supply.

Description

Technical Field

[0001] This invention relates to the field of channel construction technology, specifically to a method for installing check valves in channel lining. Background Technology

[0002] If the hydrogeological conditions along the main canal are complex and variable, and many sections of the canal are located in areas with high groundwater levels, it is necessary to install drainage check valves on the canal slope and bottom of the water-passing section to drain the groundwater under the structural layer, thereby reducing the uplift pressure of groundwater on the canal slope and bottom concrete lining, preventing the canal lining from heaving and being damaged due to excessively high groundwater levels, and ensuring the safe operation of the main canal.

[0003] like Figure 1 As shown, during the operation of the channel, due to changes in hydrogeology, the old check valve 0 designed during construction may become inadequate to meet the requirements, or the old check valve 0 installed in the concrete lining of the channel slope (or bottom) (including the lower part of the water surface 10) may fail due to component damage, causing groundwater 1 to be unable to be discharged by the old check valve 0, resulting in a rise in the groundwater level and causing uplift damage to the channel slope lining structure 2. Therefore, it is necessary to install a new check valve on the channel slope or bottom.

[0004] In existing technologies, there are no instances of adding check valves during channel operation. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention proposes a method for installing check valves on channel linings, achieving the goal of installing check valves on channels for the first time. This method enables the rapid installation of drainage check valves on channel linings, reducing the uplift pressure of groundwater on the concrete linings that form the channel slope and bottom, and preventing the channel lining from heaving and being damaged. It is particularly suitable for installing check valves on linings below the water level in the channel cross-section.

[0006] To achieve the above objectives, the present invention provides a method for installing a check valve in channel lining, which is characterized by the following steps:

[0007] S1) Determine the location for installing the new check valve on the lining structure surface of the channel slope or bottom, and cut a rectangular hole in the concrete layer at that location, with the shorter side of the rectangular hole being longer than the outer diameter of the new check valve.

[0008] S2) A rectangular geomembrane repair plate is provided, wherein the length of the short side of the rectangular geomembrane repair plate is the same as the length of the diagonal of the rectangular hole;

[0009] S3) Insert the short side of the rectangular geomembrane repair board into the bottom of the rectangular hole along the diagonal of the rectangular hole, so that the rectangular geomembrane repair board covers the rectangular hole;

[0010] S4) A tooling hole is drilled in the center of the rectangular geomembrane repair board, and the tooling hole matches the outer cylinder of the new check valve.

[0011] S5) Insert the outer cylinder of the new check valve into the tooling hole;

[0012] S6) The gap between the outer cylinder of the new check valve and the rectangular hole is filled with concrete.

[0013] Furthermore, in S1), when it is determined that the location for installing the new check valve is below the water surface, a water-blocking ring mechanism is set on the basis of the channel where the new check valve needs to be installed to form a convenient working area.

[0014] Furthermore, in S1), at the location of the rectangular hole, a perforated pipe is inserted toward the interior of the groundwater, and the diameter of the perforated pipe is larger than the diameter of the outer cylinder of the new check valve.

[0015] Furthermore, in S1), the lining structure also includes a geomembrane layer, which is located at the bottom of the concrete layer, the rectangular hole is located on the surface of the geomembrane layer, and the top surface of the perforated pipe is lower than the geomembrane layer.

[0016] Furthermore, in S3), when the geomembrane layer is located at the bottom of the concrete layer, a shearing slit is cut on the geomembrane layer exposed in the rectangular hole, corresponding to the diagonal of the rectangular hole. The short side of the rectangular geomembrane repair board is inserted into the bottom of the geomembrane layer along the shearing slit, and the rectangular geomembrane repair board is covered by pushing, pulling and rotating.

[0017] Furthermore, in S3), the cut geomembrane layer is lifted up and a perforated pipe is inserted inward, and a gap is formed between the top surface of the perforated pipe and the geomembrane layer, and the rectangular geomembrane repair plate is inserted into the gap.

[0018] Furthermore, in S3), the rectangular geomembrane repair board is tightly bonded to the geomembrane layer using an adhesive.

[0019] Furthermore, in S1), the length of the short side of the rectangular hole is 2 to 15 cm greater than the diameter of the outer cylinder of the new check valve.

[0020] Furthermore, in S5), a water-swellable sealing rubber ring is installed between the outer cylinder of the new check valve and the tooling hole to ensure a sealed connection between the outer cylinder of the new check valve and the tooling hole.

[0021] Furthermore, in S5), the bottom end of the outer cylinder of the new check valve is also provided with a connecting pipe that communicates with groundwater, and both the connecting pipe and the outer cylinder can be inserted into the tooling hole.

[0022] The advantages of this invention are:

[0023] 1. This invention only requires cutting a rectangular hole in the concrete surface where the new check valve will be installed, inserting a rectangular geomembrane repair plate into the bottom of the rectangular hole to cover it, then chiseling a tooling hole in the rectangular geomembrane repair plate, inserting the outer cylinder of the new check valve into the tooling hole, and finally filling the gap between the outer cylinder of the new check valve and the rectangular hole with concrete. This process allows for the real-time installation of new check valves on the bottom of the canal, especially on the slope, without interrupting the normal operation of the canal. It features rapid installation, minimal disturbance to the original environment, and can effectively and promptly solve the problem of heave damage to the lining caused by high-pressure groundwater on the canal slope due to damage to the old check valve.

[0024] 2. In this invention, the short side length of the rectangular geomembrane repair board is designed to be consistent with the diagonal length of the rectangular hole. The short side of the rectangular geomembrane repair board is inserted into the bottom of the rectangular hole along the diagonal position of the rectangular hole. The rectangular geomembrane repair board is covered by pushing, pulling and rotating.

[0025] 3. When the lining structure in this invention includes a geomembrane layer, a shearing seam corresponding to the diagonal of the rectangular hole is cut on the geomembrane layer exposed in the rectangular hole, so that the underground high-pressure water gushes out from the shearing seam, and the short side of the rectangular geomembrane repair plate is inserted into the bottom layer of the geomembrane layer along the shearing seam.

[0026] 4. In this invention, a perforated pipe is inserted into the groundwater at the location of the rectangular hole (if the lining structure also includes a geomembrane layer, the sheared geomembrane layer is lifted up and the perforated pipe is inserted into the groundwater), which can effectively prevent sand and soil in the channel slope structure from flowing out through the rectangular hole, and effectively ensure the integrity and stability of the subbase of the lining structure.

[0027] This invention relates to a method for installing check valves on channel linings. For the first time, it achieves the goal of installing check valves on operating channels. It enables the installation of new check valves on the channel bottom, especially on the sloping surface, without interrupting normal water flow. It features rapid installation, minimal disturbance to the original environment, and can effectively and promptly solve the problem of bulging damage to the lining caused by high-pressure groundwater on the channel slope due to the damage of old check valves. Attached Figure Description

[0028] Figure 1 A schematic diagram of the existing check valve on the channel slope in use.

[0029] Figure 2 This is a schematic diagram of the rectangular hole cut into the concrete layer in this invention;

[0030] Figure 3 This is a schematic diagram of the rectangular geomembrane repair plate used in this invention;

[0031] Figure 4 This is a schematic diagram of the structure of inserting a perforated tube into a rectangular hole in this invention;

[0032] Figure 5 This is a schematic diagram of the structure of the concrete layer and the geomembrane layer in this invention;

[0033] Figure 6 This is a schematic diagram of the structure of the rectangular geomembrane repair plate inserted into the shear joint of the geomembrane layer in this invention;

[0034] Figure 7 This is a schematic diagram of the rectangular geomembrane repair plate after being pulled back in this invention;

[0035] Figure 8 This is a schematic diagram of the structure of the rectangular geomembrane repair plate after rotation in this invention;

[0036] Figure 9 This is a schematic diagram of the planar structure of the rectangular hole in this invention;

[0037] Figure 10 This is a schematic diagram of the structure of the new check valve after replacement in this invention;

[0038] In the diagram: 0. Old check valve, 1. Groundwater, 2. Lining structure, 3. Rectangular hole, 4. Rectangular geomembrane repair board, 5. Drilled perforated pipe, 6. New check valve, 7. Water-swellable sealing rubber ring, 8. Concrete, 9. Tooling hole, 10. Water surface, 11. Gap, 12. Water-blocking ring mechanism.

[0039] Lining structure 2 includes: concrete layer 2-1, geomembrane layer 2-2, and shear joint 2-3;

[0040] The new check valve 6 includes: an outer cylinder body 6-1 and a connecting pipe body 6-2. Detailed Implementation

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0043] The present invention discloses a method for installing a check valve in a channel lining, comprising the following steps:

[0044] S1) Determine the location for installing the new check valve 6 on the surface of the lining structure 2 on the channel slope or bottom, and cut a rectangular hole 3 in the concrete layer 2-1 at that location, with the shorter side length of the rectangular hole 3 being greater than the diameter of the outer cylinder 6-1 of the new check valve 6.

[0045] Centered on the determined installation location, such as Figure 2 As shown, a rectangular frame is drawn on the concrete layer 2-1, and a rectangular hole 3 is cut along the frame, the length of which is greater than the diameter of the outer cylinder 6-1 where the new check valve 6 needs to be installed.

[0046] When the original check valve 0 needs to be replaced with a new check valve 6, the original check valve 0 that needs to be replaced is removed. Using the circular hole of the original check valve 0 as the center, a rectangular hole 3 is cut out of the concrete layer 2-1 with a short side length greater than the diameter of the outer cylinder 6-1 of the new check valve 6.

[0047] Specifically, when it is determined that the location for installing the new check valve 6 is below the water surface 10, a water-blocking ring mechanism 12 is set on the basis of the channel where the new check valve 6 needs to be installed to form a convenient working area.

[0048] Under normal circumstances, the new check valve 6 used to discharge groundwater 1 is installed below the water level of the channel. Therefore, when installing the new check valve 6, a water-blocking ring mechanism 12 is installed on the channel where the new check valve 6 needs to be installed.

[0049] Preferably, the length of the short side of the rectangular hole 3 is greater than the diameter of the outer cylinder 6-1 of the new check valve 6 by 2 to 15 cm.

[0050] Preferably, at the location of the rectangular hole 3, a perforated pipe 5 is wedged into the groundwater 1, and the diameter of the perforated pipe 5 is larger than the diameter of the outer cylinder 6-1 of the new check valve 6, such as... Figure 4 As shown. The perforated pipe 5 has several leakage and seepage holes on its wall. The perforated pipe 5 can effectively prevent sand and soil in the channel slope structure from flowing out through the rectangular holes 3, effectively ensuring the integrity and stability of the subbase of the lining structure 2.

[0051] Preferably, the lining structure 2 further includes a geomembrane layer 2-2, which is located at the bottom of the concrete layer 2-1, the rectangular hole 3 is located on the surface of the geomembrane layer 2-2, and the top surface of the perforated pipe 5 is lower than the geomembrane layer 2-2.

[0052] When cutting a rectangular hole 3 in the concrete layer 2-1 with a short side length greater than the diameter of the outer cylinder 6-1 of the new check valve 6, it is necessary to clean up the concrete debris to expose the geomembrane layer 2-2 laid underneath it.

[0053] S2) A rectangular geomembrane repair plate 4 is provided, wherein the length of the shorter side of the rectangular geomembrane repair plate 4 is the same as the length of the diagonal of the rectangular hole 3, such as Figure 3 As shown.

[0054] Preferably, the rectangular hole 3 is set as a square hole, and the corresponding rectangular geomembrane repair plate 4 is a square plate.

[0055] S3) Insert the short side of the rectangular geomembrane repair board 4 into the bottom layer of the rectangular hole 3 along the diagonal position of the rectangular hole 3, so that the rectangular geomembrane repair board 4 covers the rectangular hole 3.

[0056] It is best to set the rectangular hole 3 as a square. Of course, the rectangular geomembrane repair plate 4 inserted into the rectangular hole 3 is a corresponding square plate. Inserting, pulling back and rotating the square plate is less effort and simpler and more convenient.

[0057] Specifically, when a geomembrane layer 2-2 exists and the geomembrane layer 2-2 is located at the bottom of the concrete layer 2-1, a shearing slit 2-3 corresponding to the diagonal of the rectangular hole 3 is cut on the geomembrane layer 2-2 exposed in the rectangular hole 3. The rectangular geomembrane repair plate 4 is inserted into the bottom of the geomembrane layer 2-2 along the short side of the shearing slit 2-3. The rectangular geomembrane repair plate 4 is then covered by pushing, pulling, and rotating to make the rectangular geomembrane repair plate 4 cover the rectangular hole 3.

[0058] like Figure 5 As shown, two shear seams 2-3 are cut on the geomembrane layer 2-2 exposed in the rectangular hole 3, corresponding to the diagonal of the rectangular hole 3. If the groundwater level 1 is high, high-pressure water will gush out from the shear seams 2-3.

[0059] The cut geomembrane layer 2-2 is lifted up, and a perforated tube 5 is inserted inward, forming a gap 11 between the top surface of the perforated tube 5 and the geomembrane layer 2-2. The rectangular geomembrane repair plate 4 is inserted into the gap 11. Figure 4 As shown.

[0060] like Figures 5-6 As shown, Figure 3 The short side of the rectangular geomembrane repair plate 4 shown is inserted into one of the shear joints 2-3 on the geomembrane layer 2-2 and enters the gap 11 between the perforated pipe 5 and the geomembrane layer 2-2.

[0061] In this step, the shear joints 2-3 can be cut to their opposite corners (longest). The short side of the rectangular geomembrane repair board 4 can be inserted into the bottom layer of the geomembrane layer 2-2 in one of the two shear joints 2-3, depending on the construction direction and difficulty. Alternatively, only one of the shear joints 2-3 can be cut to its opposite corner for the insertion of the rectangular geomembrane repair board 4.

[0062] After inserting the rectangular geomembrane repair plate 4 into the bottom layer of the rectangular hole 3 through the shear joint 2-3, the rectangular geomembrane repair plate 4 is pulled back and rotated (as shown in the image). Figure 7 As shown), so that it covers and blocks the rectangular hole 3 (as shown). Figure 8 (As shown).

[0063] Preferably, the rectangular geomembrane repair plate 4 is tightly bonded to the geomembrane layer 2-2 using an adhesive.

[0064] S4) A tooling hole 9 is drilled in the center of the rectangular geomembrane repair plate 4, and the tooling hole 9 matches the outer cylinder 6-1 of the new check valve 6.

[0065] like Figure 9 As shown, at the center of the rectangular geomembrane repair plate 4 that covers the rectangular hole 3, a tooling hole 9 is provided to insert the outer cylinder 6-1 of the new check valve 6. The outer cylinder 6-1 of the new check valve 6 is inserted into the tooling hole 9, and the geomembrane layer 2-2 is bonded to the outer cylinder 6-1 of the new check valve 6 using adhesive.

[0066] S5) Insert the outer cylinder 6-1 of the new check valve 6 into the tooling hole 9.

[0067] like Figure 10 As shown, a water-swellable sealing rubber ring 7 is installed between the outer cylinder 6-1 of the new check valve 6 and the tooling hole 9 to ensure a sealed connection between the outer cylinder 6-1 of the new check valve 6 and the tooling hole 9.

[0068] In S5), the bottom end of the outer cylinder 6-1 of the new check valve 6 is also provided with a connecting pipe 6-2 that communicates with the groundwater. Both the connecting pipe 6-2 and the outer cylinder 6-1 can pass through the tooling hole 9.

[0069] If the lining structure 2 constituting the channel does not use a geomembrane layer 2-2, the rectangular geomembrane repair plate 4 can be directly inserted into its rear through the rectangular hole 3, and then the rectangular hole 3 can be directly covered by pushing, pulling and rotating. Then, a tooling hole 9 is dug in the center of the rectangular geomembrane repair plate 4, and the outer cylinder 6-1 of the new check valve 6 is inserted into the tooling hole 9.

[0070] During the installation of the new check valve 6, based on the structure of the new check valve 6, the outer cylinder 6-1 of the new check valve 6 can be either the outer cylinder of the new check valve 6 itself or the connecting pipe 6-2 used to connect the new check valve body with the groundwater. Both the outer cylinder 6-1 and the connecting pipe 6-2 can be inserted into the tooling hole 9 in the center of the rectangular geomembrane repair plate 4 to form a through connection with the groundwater. Before inserting the connecting pipe 6-2 into the tooling hole 9, it is best to assemble the new check valve 6 body onto the connecting pipe 6-2.

[0071] S6) The gap between the outer cylinder 6-1 of the new check valve 6 and the rectangular hole 3 is filled with concrete 8, thus completing the installation of the new check valve 6 on the lining structure 2 of the channel slope or bottom.

[0072] This installation process achieves the goal of installing check valves on operating channels for the first time. It is particularly suitable for installing check valves on the lining below the water level in the channel cross-section. It can quickly install drainage check valves on the channel lining, reduce the uplift pressure of groundwater on the concrete lining that makes up the channel slope and bottom, and prevent the channel lining from heaving and being damaged.

[0073] When replacing the old, failed check valve 0 on the channel slope lining, remove the old check valve 0 and cut a rectangular hole in the concrete layer 2-1 with the short side length greater than the diameter of the new check valve, using the circular hole of the old check valve 0 as the center.

[0074] The method for installing check valves on channel linings according to this invention enables the real-time installation of new check valves on the channel bottom, especially on the sloping surface, without interrupting normal water flow in the channel. It features rapid installation, minimal disturbance to the original environment, and can effectively and promptly solve the problem of bulging damage to the lining caused by high-pressure groundwater on the channel slope due to damage to the old check valves.

[0075] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A method for installing check valves in channel linings, characterized in that, Includes the following steps: S1) Determine the location for installing the new check valve (6) on the surface of the lining structure (2) of the channel slope or bottom, and cut a rectangular hole (3) in the concrete layer (2-1) at that location, with the short side length of the rectangular hole (3) being greater than the diameter of the outer cylinder (6-1) of the new check valve (6); The lining structure (2) also includes a geomembrane layer (2-2), which is located at the bottom of the concrete layer (2-1), and the rectangular hole (3) is located on the surface of the geomembrane layer (2-2); S2) Set a rectangular geomembrane repair plate (4), the length of the short side of the rectangular geomembrane repair plate (4) is the same as the length of the diagonal of the rectangular hole (3); S3) When the geomembrane layer (2-2) is located at the bottom of the concrete layer (2-1), cut a shear seam (2-3) on the geomembrane layer (2-2) exposed in the rectangular hole (3) that corresponds to the diagonal of the rectangular hole (3). Insert the short side of the rectangular geomembrane repair plate (4) along the shear seam (2-3) into the bottom of the geomembrane layer (2-2). By pushing, pulling and rotating, the rectangular geomembrane repair plate (4) covers the rectangular hole (3). S4) A tooling hole (9) is drilled in the center of the rectangular geomembrane repair board (4), and the tooling hole (9) matches the outer cylinder (6-1) of the new check valve (6); S5) Insert the outer cylinder (6-1) of the new check valve (6) into the tooling hole (9); S6) The gap between the outer cylinder (6-1) of the new check valve (6) and the rectangular hole (3) is filled with concrete (8).

2. The method for installing a check valve in the channel lining according to claim 1, characterized in that: In S1), when it is determined that the location for installing the new check valve (6) is below the water surface (10), a water-blocking ring mechanism (12) is set on the channel where the new check valve (6) needs to be installed to form a convenient working area.

3. The method for installing a check valve in the channel lining according to claim 1, characterized in that: In S3), the cut geomembrane layer (2-2) is lifted up and the perforated pipe (5) is wedged inward, and the diameter of the perforated pipe (5) is larger than the diameter of the outer cylinder (6-1) of the new check valve (6). A gap (11) is formed between the top surface of the perforated pipe (5) and the geomembrane layer (2-2), and the rectangular geomembrane repair plate (4) is inserted into the gap (11).

4. The method for installing a check valve in the channel lining according to claim 3, characterized in that: In S3), the rectangular geomembrane repair plate (4) and the geomembrane layer (2-2) are tightly bonded together with an adhesive.

5. The method for installing a check valve in the channel lining according to claim 1, characterized in that: In S1), the length of the short side of the rectangular hole (3) is 2~15cm longer than the diameter of the outer cylinder (6-1) of the new check valve (6).

6. The method for installing a check valve in channel lining according to claim 1, characterized in that: In S5), a water-swellable sealing rubber ring (7) is installed between the outer cylinder (6-1) of the new check valve (6) and the tooling hole (9) to make the outer cylinder (6-1) of the new check valve (6) and the tooling hole (9) sealed together.

7. The method for installing a check valve in channel lining according to claim 6, characterized in that: In S5), the bottom end of the outer cylinder (6-1) of the new check valve (6) is also provided with a connecting pipe (6-2) that communicates with the groundwater. Both the connecting pipe (6-2) and the outer cylinder (6-1) can be inserted into the tooling hole (9).

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