Construction method for adding check valve to canal lining

Abstract

The invention discloses a construction method for additionally installing a check valve on a canal lining. The method comprises the following steps that a rectangular hole is cut in the position where a new check valve is determined to be additionally installed, and the length of the short side of the rectangular hole is larger than the diameter of an outer barrel of the new check valve; a rectangular geomembrane repairing plate is arranged, and the side length of the short side of the rectangular geomembrane repairing plate is consistent with the length of the diagonal line of the rectangular hole; the short edge of the rectangular geomembrane repairing plate is inserted into the bottom layer of the rectangular hole along the diagonal position of the rectangular hole, so that the rectangular hole is covered with the rectangular geomembrane repairing plate; a tool hole is dug in the center of the rectangular geomembrane repairing plate, and the tool hole is matched with the new check valve outer barrel; a new check valve outer barrel is inserted into the tool hole; and a gap between the outer cylinder of the new check valve and the rectangular hole is filled with concrete. The purpose that the check valve is additionally arranged on the operation channel is achieved for the first time, and the problem that the lining is upheaved and damaged by high-pressure underground water of the channel slope can be effectively and timely solved under the condition that the channel normally operates without cutting off water.

Description

Technical Field

[0001] The invention relates to the technical field of channel construction, and in particular to a method for installing a check valve on a channel lining. Background Art

[0002] If the hydrogeological conditions along the main canal are complex and changeable, and many canal sections are located in areas with high groundwater levels, it is necessary to install drainage check valves on the channel slope and channel bottom of the water-passing section to discharge groundwater under the structural layer, so as to reduce the uplift pressure of groundwater on the channel slope and channel bottom concrete lining, so that the channel lining will not be uplifted and damaged due to excessively high groundwater levels, thereby ensuring the safe operation of the main canal.

[0003] like Figure 1 As shown, during the operation of the channel, due to hydrogeological changes, the old check valve 0 designed during construction is difficult to meet the needs, or because the old check valve 0 set in the concrete lining of the channel slope (or channel bottom) (including the lower part of the water surface 10) is damaged and fails due to component damage, the groundwater 1 cannot be discharged by the old check valve 0, resulting in the rise of the groundwater level and the formation of uplift damage to the channel slope lining structure 2, and a new check valve needs to be installed on the channel slope or channel bottom of the channel.

[0004] In the prior art, there is no situation where a check valve is installed during channel operation. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention proposes a method for installing a check valve on a channel lining, which achieves the goal of installing a check valve on a channel for the first time. The drainage check valve can be quickly installed on the channel lining, thereby reducing the uplift pressure of groundwater on the concrete lining constituting the channel slope and bottom, avoiding uplift and damage to the channel lining. The method is particularly suitable for installing a check valve on the lining below the water surface line of the channel water-passing section.

[0006] In order to achieve the above-mentioned purpose, the invention provides a method for installing a check valve on a channel lining, which is particularly characterized in that it comprises the following steps:

[0007] S1) Determine the location for installing a new check valve on the lining structure surface of the channel slope or channel bottom, and cut a rectangular hole in the concrete layer at the location, and the length of the short side of the rectangular hole is greater than the diameter of the outer cylinder of the new check valve;

[0008] S2) providing a rectangular geomembrane repair plate, wherein the length of the short side of the rectangular geomembrane repair plate is consistent with the diagonal length of the rectangular hole;

[0009] S3) inserting the short side of the rectangular geomembrane repair plate into the bottom layer of the rectangular hole along the diagonal position of the rectangular hole, so that the rectangular geomembrane repair plate covers the rectangular hole;

[0010] S4) A tooling hole is drilled in the center of the rectangular geomembrane repair plate, 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) Fill the gap between the outer cylinder of the new check valve and the rectangular hole with concrete.

[0013] Further, in S1), when it is determined that the position for installing the new check valve is below the water surface, a water retaining 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 rectangular hole position, a perforated flower pipe is wedged into the groundwater, and the diameter of the perforated flower 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, the geomembrane layer is located at the bottom layer of the concrete layer, the rectangular holes are located at the surface layer of the geomembrane layer, and the top surface of the perforated flower pipe is lower than the geomembrane layer.

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

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

[0018] Furthermore, in S3), the rectangular geomembrane repair plate and the geomembrane layer are tightly bonded with 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] Further, in S5), a water-swellable sealing rubber ring is provided 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), a connecting pipe body connected to groundwater is also provided at the bottom end of the outer cylinder of the new check valve, and both the connecting pipe body and the outer cylinder can be inserted into the tooling hole.

[0022] The advantages of the present invention are:

[0023] 1. The present invention only needs to cut a rectangular hole on the concrete surface where the new check valve is installed, and then insert a rectangular geomembrane repair plate into the bottom of the rectangular hole so that the rectangular geomembrane repair plate covers the rectangular hole, and then drill a tooling hole on the rectangular geomembrane repair plate, insert the outer cylinder of the new check valve into the tooling hole, and finally fill the gap between the outer cylinder of the new check valve and the rectangular hole with concrete, so as to realize the installation of the new check valve; the installation process can install the new check valve on the bottom of the channel, especially on the slope surface, in real time when the channel is operating normally without stopping water, and has the characteristics of fast installation and little disturbance to the original environment, and can effectively and timely solve the problem of uplift damage to the lining caused by high-pressure groundwater on the channel slope due to damage to the old check valve;

[0024] 2. The present invention designs the short side length of the rectangular geomembrane repair plate to be consistent with the diagonal length of the rectangular hole, and inserts the short side of the rectangular geomembrane repair plate along the diagonal position of the rectangular hole toward the bottom of the rectangular hole, and covers the rectangular hole by pushing, pulling and rotating the rectangular geomembrane repair plate;

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

[0026] 4. The present invention inserts a perforated flower pipe into the groundwater at the rectangular hole position (if the lining structure also includes a geomembrane layer, the sheared geomembrane layer is lifted up and the perforated flower pipe is inserted into the groundwater), which can effectively prevent the sand in the channel slope structure from flowing out of the rectangular hole, and effectively ensure the integrity and stability of the cushion layer under the lining structure;

[0027] The method of installing a check valve on a channel lining of the present invention realizes the goal of installing a check valve on a running channel for the first time. The new check valve can be installed on the channel bottom, especially on the slope surface, while the channel is operating normally without water stopping. It has the characteristics of rapid installation and little disturbance to the original environment, and can effectively and timely solve the problem of uplift damage to the lining caused by high-pressure groundwater on the channel slope due to damage to the old check valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the old check valve on the channel slope in the prior art in the use state;

[0029] Figure 2 It is a schematic structural diagram of a rectangular hole cut out on a concrete layer in the present invention;

[0030] Figure 3 It is a schematic diagram of the structure of the rectangular geomembrane repair plate provided in the present invention;

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

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

[0033] Figure 6 It is a structural schematic diagram of the short side of the rectangular geomembrane repair plate in the present invention being inserted into the shear seam of the geomembrane layer;

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

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

[0036] Fig. 9 It is a schematic diagram of the planar structure of the rectangular hole in the present invention;

[0037] Fig.10 It is a structural schematic diagram of a new check valve after being installed in the present invention;

[0038] In the figure: old check valve 0, groundwater 1, lining structure 2, rectangular hole 3, rectangular geomembrane repair plate 4, perforated flower pipe 5, new check valve 6, water-expandable sealing rubber ring 7, concrete 8, tooling hole 9, water surface 10, gap 11, water retaining ring mechanism 12;

[0039] The lining structure 2 includes: a concrete layer 2-1, a geomembrane layer 2-2, and a 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 DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0042] In the description of the present invention, it is necessary to understand that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention.

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

[0044] S1) Determine the position for installing a new check valve 6 on the surface of the lining structure 2 of the channel slope or channel bottom, and cut a rectangular hole 3 in the concrete layer 2-1 at the position, and 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.

[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 whose short side length is greater than the diameter of the outer cylinder 6-1 of the new check valve 6 to be installed is cut along the frame.

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

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

[0048] Generally, the new check valve 6 for discharging groundwater 1 is arranged below the water surface line of the channel. Therefore, when installing the new check valve 6, a water retaining ring mechanism 12 is arranged on the basis of the channel where the new check valve 6 is to be installed.

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

[0050] Preferably, at the position of the rectangular hole 3, a perforated flower pipe 5 is inserted toward the inside of the groundwater 1, and the diameter of the perforated flower pipe 5 is larger than the diameter of the outer cylinder 6-1 of the new check valve 6, such as Figure 4 The perforated flower pipe 5 is provided with a plurality of leakage and seepage holes on its wall, and the perforated flower pipe 5 can effectively prevent the sand in the channel slope structure from flowing out from the rectangular hole 3, and effectively ensure the integrity and stability of the cushion layer under the lining structure 2.

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

[0052] When the rectangular hole 3 whose short side length is greater than the diameter of the outer cylinder 6-1 of the new check valve 6 is cut out of the concrete layer 2-1, the concrete debris needs to be cleaned to expose the geomembrane layer 2-2 laid thereunder.

[0053] S2) a rectangular geomembrane repair plate 4 is provided, wherein the short side length of the rectangular geomembrane repair plate 4 is consistent with the diagonal length of the rectangular hole 3, such as Figure 3 shown.

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

[0055] S3) inserting the short side of the rectangular geomembrane repair plate 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 plate 4 covers the rectangular hole 3.

[0056] The rectangular hole 3 is preferably set to a square. Of course, the rectangular geomembrane repair plate 4 inserted into the rectangular hole 3 is a corresponding square plate, and the insertion, pulling back and rotating of the square plate is more labor-saving, simple and convenient.

[0057] Specifically, when there is a geomembrane layer 2-2 and the geomembrane layer 2-2 is located at the bottom layer of the concrete layer 2-1, a shear seam 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, and the short side of the rectangular geomembrane repair plate 4 is inserted into the bottom layer of the geomembrane layer 2-2 along the shear seam 2-3, and the rectangular geomembrane repair plate 4 is covered with the rectangular hole 3 by pushing, pulling and rotating.

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

[0059] The sheared geomembrane layer 2-2 is lifted up and the perforated flower tube 5 is wedged inwardly, and a gap 11 is formed between the top surface of the perforated flower tube 5 and the geomembrane layer 2-2, and the rectangular geomembrane repair plate 4 is inserted into the gap 11. Figure 4 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 seams 2-3 on the geomembrane layer 2-2 and enters the gap 11 between the perforated flower tube 5 and the geomembrane layer 2-2.

[0061] In this step, the shear seams 2-3 can be cut to their diagonals (the longest), and the short sides of the rectangular geomembrane repair plate 4 can be selected to insert the bottom layer of the geomembrane layer 2-2 into the two shear seams 2-3 according to the construction direction and difficulty; of course, only one of the shear seams 2-3 can be cut to its diagonal for the insertion of the rectangular geomembrane repair plate 4.

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

[0063] Preferably, the rectangular geomembrane repair plate 4 and the geomembrane layer 2-2 are tightly bonded with an adhesive.

[0064] S4) A tooling hole 9 is excavated 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 Fig. 9 As shown, a tooling hole 9 into which the outer cylinder 6-1 of the new check valve 6 can be inserted is provided at the center of the rectangular geomembrane repair plate 4 that covers the rectangular hole 3. 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 an adhesive.

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

[0067] like Fig.10 As shown, a water-swellable sealing rubber ring 7 is provided between the outer cylinder 6 - 1 of the new check valve 6 and the tooling hole 9 , so that the outer cylinder 6 - 1 of the new check valve 6 and the tooling hole 9 are sealed and connected.

[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 body 6-2 connected to the groundwater, and both the connecting pipe body 6-2 and the outer cylinder 6-1 can be inserted into the tooling hole 9.

[0069] If the geomembrane layer 2-2 is not used in the lining structure 2 constituting the channel, the rectangular geomembrane repair plate 4 can be directly inserted into the rear part through the rectangular hole 3, and then the rectangular hole 3 can be directly covered by pushing, pulling and rotating, and then a tooling hole 9 is dug out 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 process of the new check valve 6, according to the structure of the new check valve 6, the outer cylinder 6-1 of the new check valve outer 6 can be either the outer cylinder constituting the new check valve 6 itself or the connecting pipe body 6-2 part used to connect the new check valve body with groundwater; both the outer cylinder 6-1 of the new check valve 6 and the connecting pipe body 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 the connecting pipe body 6-2 is inserted into the tooling hole 9, it is best to assemble the new check valve 6 body on the connecting pipe body 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 channel bottom.

[0072] This installation process achieves the goal of installing a check valve on a running channel for the first time. It is particularly suitable for installing a check valve on the lining below the water surface line of the channel's water-passing section. It can quickly install a drainage check valve on the channel lining to reduce the uplift pressure of groundwater on the concrete lining that constitutes the channel slope and bottom, and avoid uplift and damage to the channel lining.

[0073] When the original invalid old check valve 0 on the channel slope lining needs to be replaced, the invalid old check valve 0 is removed, and a rectangular hole with a short side length greater than the diameter of the new check valve is cut out of the concrete layer 2-1 with the circular hole of the old check valve 0 as the center.

[0074] The method of installing a check valve on a channel lining of the present invention can install a new check valve on the channel bottom, especially on the slope surface, in real time when the channel is operating normally without water stopping. It has the characteristics of rapid installation and little disturbance to the original environment, and can effectively and timely solve the problem of uplift damage to the lining caused by high-pressure groundwater on the channel slope due to damage to the old check valve.

[0075] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A method for installing a check valve on a channel lining, characterized in that: The steps include: S1) determining a position for installing a new check valve (6) on the surface of a lining structure (2) at a channel slope or channel bottom, and cutting a rectangular hole (3) in a concrete layer (2-1) at the position, wherein the length of a short side of the rectangular hole (3) is greater than the diameter of an outer cylinder (6-1) of the new check valve (6); S2) providing a rectangular geomembrane repair plate (4), wherein the length of the short side of the rectangular geomembrane repair plate (4) is consistent with the length of the diagonal line of the rectangular hole (3); S3) inserting the short side of the rectangular geomembrane repair plate (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 plate (4) covers the rectangular hole (3); S4) a tooling hole (9) is bored 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); S5) inserting 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 on a channel lining according to claim 1 is characterized by: In S1), when it is determined that the position for installing the new check valve (6) is below the water surface (10), a water retaining ring mechanism (12) is arranged on the basis of the channel where the new check valve (6) needs to be installed, so as to form a convenient working area.

3. The method for installing a check valve on a channel lining according to claim 1 is characterized in that: In step S1), at the position of the rectangular hole (3), a perforated flower pipe (5) is inserted toward the inside of the groundwater (1), and the diameter of the perforated flower pipe (5) is larger than the diameter of the outer cylinder (6-1) of the new check valve (6).

4. The method for installing a check valve on a channel lining according to claim 3 is characterized by: S1), the lining structure (2) further comprises a geomembrane layer (2-2), the geomembrane layer (2-2) is located at the bottom layer of the concrete layer (2-1), the rectangular hole (3) is located at the surface layer of the geomembrane layer (2-2), and the top surface of the perforated flower pipe (5) is lower than the geomembrane layer (2-2).

5. The method for installing a check valve on a channel lining according to claim 4 is characterized in that: S3), when the geomembrane layer (2-2) is located at the bottom layer of the concrete layer (2-1), a shear 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), and the short side of the rectangular geomembrane repair plate (4) is inserted into the bottom layer of the geomembrane layer (2-2) along the shear slit (2-3), and the rectangular geomembrane repair plate (4) is covered with the rectangular hole (3) by pushing, pulling and rotating.

6. The method for installing a check valve on a channel lining according to claim 5 is characterized by: In S3), the sheared geomembrane layer (2-2) is lifted up and wedged into the perforated flower tube (5) toward the inside, and a gap (11) is formed between the top surface of the perforated flower tube (5) and the geomembrane layer (2-2), and the rectangular geomembrane repair plate (4) is inserted into the gap (11).

7. The method for installing a check valve on a channel lining according to claim 6 is characterized by: In S3), the rectangular geomembrane repair plate (4) and the geomembrane layer (2-2) are tightly bonded by an adhesive.

8. The method for installing a check valve on a channel lining according to claim 1 is characterized by: S1), the length of the short side of the rectangular hole (3) is 2 to 15 cm greater than the diameter of the outer cylinder (6-1) of the new check valve (6).

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

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

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