Water closing test method for large-span radial gate

Abstract

The invention relates to the technical field of water closing tests of large-span radial gates, and provides a water closing test method of a large-span radial gate, which comprises the following steps: constructing a water closing test space, closing a gate of a target gate hole, and setting an upstream temporary closing area; arranging a water injection system, and arranging a water injection pump, a water conveying pipeline, a valve and a flow meter; checking the sealing and connecting state of each facility before the test; performing graded water injection, sequentially loading a low water head, a middle water head and a designed water head, and observing the leakage condition step by step; after water injection is stopped and the water level is maintained at the designed water head stage, water stop area leakage observation and gate structure displacement measurement are carried out; and after the test is finished, draining water and sorting data for performance evaluation. According to the invention, the sealing performance and the installation quality of the large-span radial gate can be effectively verified, and if the leakage amount is within a design allowable range, the gate is good in sealing and stable in structure; on the contrary, reasons need to be searched for and processed. The method is suitable for the standardized closed water test before field operation.

Description

Technical Field

[0001] The invention relates to the technical field of water-tightness testing of large-span radial gates, in particular to a water-tightness testing method of large-span radial gates. Background Art

[0002] As core equipment in water conservancy projects, radial gates undergo a water-tightness test, a crucial step in verifying their sealing and safety. This test examines water leaks between the radial gate and its slot, between its components, and at the water seals, while the radial gate is under a certain water pressure. This test verifies that the radial gate's sealing performance meets design requirements and ensures it can effectively block water flow and prevent leakage during normal operation.

[0003] The water seal device is a key component to ensure the sealing of the radial gate. The closed water test can directly examine the working status of the radial gate water seal under the action of water pressure, check whether it can effectively prevent the flow of water, and promptly discover possible problems such as damage, loose installation, etc., so as to repair or replace them.

[0004] The closed water test can simulate the working environment of the radial gate in actual operation, so that some potential problems that are difficult to find during the construction process are exposed under the action of water pressure, so that timely measures can be taken to deal with them, avoid safety hazards in the actual operation of the radial gate, and ensure the safe operation of the flood diversion gate project. Summary of the Invention

[0005] The purpose of the present invention is to provide a water-tightness test for a large-span radial gate to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A closed water test method for a large-span radial gate comprises the following steps: S1. Constructing a closed water test space: Close the radial gate of the target gate hole to form a preliminary seal between the radial gate and the radial gate groove and the water stop device between the radial gate and the sill. Set up a temporary closed area upstream of the radial gate to construct a closed water test space; S2. Lay out the water injection system: A water injection system is arranged on the upstream side of the radial gate, the water injection system including a water injection pump and a water delivery pipeline. A flow control valve and a flow meter are provided in the water delivery pipeline to supply water to the test area through the water injection system; S3. Inspection before test: Check the locking status of the radial gate, the sealing status of the temporarily closed area, and the connection of the water injection system to ensure that all facilities are correctly installed and firmly connected; S4, graded water injection: The water injection process is divided into multiple stages, which are filled step by step, including at least the low head stage, the medium head stage and the design head stage. After each stage of water injection is completed, the water is maintained for a set time and observed for leakage; S5. Leakage and deformation monitoring: After filling water to the design head, stop filling and maintain the water level for at least 2 hours. During this period, make the following observations: (a) Conduct manual or instrument inspections of the radial gate water stop area for leakage to determine whether there is dripping or line flow; (b) Use a total station or similar measuring equipment to conduct fixed-point measurements of the horizontal displacement of the radial gate and the temporarily closed area at preset intervals to obtain deformation trends; S6. End of test and evaluation: After draining the test water body, the water level, leakage and displacement monitoring data are collated to comprehensively evaluate whether the sealing performance of the radial gate meets the design standards.

[0007] Preferably, the low head stage, medium head stage and design head stage in S4 are 2.5 meters, 4.5 meters and 6.68 meters respectively, and the next water injection is carried out 30 minutes after each stage of water injection is completed.

[0008] Preferably, the water level rising rate during water injection in S4 does not exceed 0.2 m / min.

[0009] Preferably, an energy dissipation structure is provided at the end of the water injection pipe to buffer the impact of water flow.

[0010] Preferably, the energy dissipation structure is a flexible belt.

[0011] Preferably, after the design water head, horizontal displacement measurement is performed at least three monitoring points of the radial gate and the temporarily closed area using a total station, and observations are made every 2 hours to record the cumulative displacement changes of the radial gate and the temporarily closed area.

[0012] Preferably, before the graded water injection in S4, a color-changing anti-seepage cloth layer is attached to the water-stop area of ​​the radial gate for coloring leakage.

[0013] Preferably, before S1, the contact surface between the radial gate water-stop rubber strip and the radial gate groove and the bottom sill is cleaned to remove mud, sand and debris to ensure the flatness and sealing performance of the water-stop contact surface.

[0014] The present invention discloses a water-tightness test method for a large-span radial gate, which has the following beneficial effects.

[0015] The present invention constructs a complete closed water test space, injects water step by step and loads it to the designed water head, which can fully simulate the actual operating status of the arc gate under test conditions and effectively check the sealing of the gate. The present invention divides the water injection process into multiple stages of low head, medium head and designed head, and sets a static observation time after each stage of water injection, which effectively avoids the structural impact risk caused by one-time loading, and facilitates real-time observation of leakage phenomena; the present invention uses a total station to regularly observe the displacement changes of the gate and the closed structure, and combines manual or auxiliary equipment to inspect the water-stop area, which can accurately obtain the sealing status and structural deformation information. The present invention exposes some potential problems that are not easy to find during the construction process under the action of water pressure, so that timely measures can be taken to deal with them, avoid safety hazards in the actual operation of the gate, and ensure the safe operation of the flood diversion gate project. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a flow chart of a water-tightness test method for a large-span radial gate according to the present invention; Figure 2 It is a side view schematic diagram of the closed water test space of the present invention; Figure 3 It is a schematic top view of the closed water test space of the present invention.

[0017] In the attached figure: 1. Radial gate; 2. Large formwork; 3. Formwork reinforcement components; 4. Water level gauge; 5. Sandbag; 6. Gate pier. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention. Example

[0020] like Figure 1-Figure 3 As shown, a closed water test method for a large-span radial gate includes the following steps: S1. Constructing a closed water test space: Clean the contact surface between the radial gate 1 water-stop rubber strip and the radial gate 1 gate groove and sill to remove mud, sand and debris to ensure the flatness and sealing performance of the water-stop contact surface. Close the radial gate 1 of the target gate hole to form a preliminary seal between the radial gate 1 and the radial gate 1 gate groove and sill of the water-stop device. Set up a temporary closed area upstream of the radial gate 1 to construct a closed water test space. For example, in this embodiment, a temporary closed area can be set up upstream of the radial gate 1 using a large formwork 2. Formwork reinforcement components 3 are installed upstream of the large formwork 2 to reinforce the large formwork 2. A waterproof sheet is laid on the downstream surface of the large formwork 2, with an overlap length of greater than 30 cm. The waterproof sheet can be made of double-layer waterproof membrane SBS. The overlap is sealed with structural adhesive and leak-proof sealant. Both sides of the waterproof sheet are extended 50 cm toward the gate pier 6 for reinforcement. Similarly, the waterproof sheet is extended 50 cm along the bottom surface for reinforcement. Structural adhesive and leak-proof sealant are used to seal the junction of the waterproof sheet and the gate pier 6 to ensure a tight seal and prevent leakage during water injection. The temporary closed area should have sufficient strength and stability to withstand the test head pressure.

[0021] S2. Lay out the water injection system: A water injection system is installed upstream of the radial gate 1. This system includes a water injection pump and a water pipeline. A flow control valve and flow meter are installed in the pipeline to supply water to the test area. In this embodiment, the water injection pipeline should be made of high-pressure, corrosion-resistant pipes, and the pipe joints should be reliably sealed. In this embodiment, a water level gauge 4 is installed on the side of the gate pier 6 within the gate opening to monitor water level changes.

[0022] S3. Inspection before test: Check the locking status of Radial Gate 1, the sealing status of the temporarily closed area, and the connection of the water injection system to ensure that all facilities are correctly installed and securely connected. It is important to check the reliability of the locking device of Radial Gate 1 to prevent displacement of Radial Gate 1 during the water injection process. Reconfirm the safety protection measures in the test area to ensure a safe test environment.

[0023] Preferably, in this embodiment, a color-changing anti-seepage fabric layer is attached to the water-stop area of ​​the radial gate 1 to display color when leakage occurs.

[0024] S4, graded water injection: The water injection process is divided into multiple stages, with step-by-step injection performed sequentially, including at least a low head stage, a medium head stage, and a design head stage. After each stage, water injection is maintained for a set time, and any leakage is observed. In this embodiment, the purpose of maintaining the water injection for a set time after each stage is to observe whether the water seal and temporary plugging facilities of the radial gate 1 are abnormally deformed or leaking. During the water injection process, the water injection rate, water level changes, and the condition of the various components of the radial gate 1 are closely monitored. If any abnormality is detected, the water injection is promptly stopped and addressed.

[0025] Preferably, in this embodiment, the low head stage, medium head stage and design head stage in S4 are 2.5 meters, 4.5 meters and 6.68 meters respectively, and the next water injection is carried out 30 minutes after each stage of water injection is completed.

[0026] Preferably, in this embodiment, the water level rising rate during water injection in S4 does not exceed 0.2 m / min to avoid impact damage to the closed structure or components of the radial gate 1 due to a sudden rise in water head.

[0027] Preferably, in this embodiment, an energy dissipation structure is provided at the end of the water injection pipe to buffer the impact of water flow.

[0028] Preferably, in this embodiment, the energy dissipation structure is a flexible belt. Specifically, in this embodiment, the energy dissipation structure is a colored strip cloth. In this embodiment, in order to prevent the impact force of the water flow from damaging the sealing material, several sand bags 5 are laid downstream of the waterproof cloth.

[0029] Preferably, in this embodiment, before the graded water injection in S4, a color-changing anti-seepage cloth layer is attached to the water-stop area of ​​the radial gate 1 for coloring leakage.

[0030] S5. Leakage and deformation monitoring: After filling water to the design head, stop filling and maintain the water level for at least 2 hours. During this period, make the following observations: (a) Conduct manual or instrument inspections of the leakage in the water stop area of ​​the radial gate 1 to determine whether there is dripping or line flow; (b) Use a total station or similar measuring equipment to perform fixed-point measurement of the horizontal displacement of the radial gate 1 and the temporarily closed area at preset intervals to obtain deformation trends; Preferably, in this embodiment, after the water head is designed, horizontal displacement measurement is performed on the radial gate 1 and at least three monitoring points in the temporarily closed area using a total station, and observations are made every 2 hours to record the cumulative displacement changes of the radial gate 1 and the temporarily closed area.

[0031] S6. End of test and evaluation: After draining the test water, the water level, leakage, and displacement monitoring data are collated to comprehensively assess whether the sealing performance of the radial gate 1 meets the design standards. This method can effectively verify the sealing performance and installation quality of the long-span radial gate 1. If the leakage is within the design allowable range, the seal between the gate and the side radial gate groove and the bottom sill is good and the structure is stable. Otherwise, the cause needs to be identified and addressed.

[0032] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Replacement may be partial structure, device, or method step replacement, or it may be a complete technical solution. Equivalent replacements or modifications based on the technical solution and inventive concept of the present invention are all within the scope of protection of the present invention.

Claims

1. A water-tightness test method for a large-span radial gate, characterized in that: The following steps are involved: S1. Constructing a closed water test space: Close the radial gate of the target gate hole to form a preliminary seal between the radial gate and the radial gate groove and the water stop device between the radial gate and the sill. Set up a temporary closed area upstream of the radial gate to construct a closed water test space; S2. Lay out the water injection system: A water injection system is arranged on the upstream side of the radial gate, the water injection system including a water injection pump and a water delivery pipeline. A flow control valve and a flow meter are provided in the water delivery pipeline to supply water to the test area through the water injection system; S3. Inspection before test: Check the locking status of the radial gate, the sealing status of the temporarily closed area, and the connection of the water injection system to ensure that all facilities are correctly installed and firmly connected; S4, graded water injection: The water injection process is divided into multiple stages, which are filled step by step, including at least the low head stage, the medium head stage and the design head stage. After each stage of water injection is completed, the water is maintained for a set time and observed for leakage; S5. Leakage and deformation monitoring: After filling water to the design head, stop filling and maintain the water level for at least 2 hours. During this period, make the following observations: (a) Conduct manual or instrument inspections of the radial gate water stop area for leakage to determine whether there is dripping or line flow; (b) Use a total station or similar measuring equipment to conduct fixed-point measurements of the horizontal displacement of the radial gate and the temporarily closed area at preset intervals to obtain deformation trends; S6. End of test and evaluation: After draining the test water body, the water level, leakage and displacement monitoring data are collated to comprehensively evaluate whether the sealing performance of the radial gate meets the design standards.

2. A closed water test method for a large-span radial gate according to claim 1, characterized in that: The low head stage, medium head stage and design head stage in S4 are 2.5 meters, 4.5 meters and 6.68 meters respectively. After each stage of water injection is completed, the next water injection is carried out 30 minutes later.

3. The closed water test method for a large-span radial gate according to claim 1, characterized in that: When water is injected into S4, the water level rising rate does not exceed 0.2 m / min.

4. A closed water test method for a large-span radial gate according to claim 1, characterized in that: An energy dissipation structure is provided at the end of the water injection pipe to buffer the impact of water flow.

5. A closed water test method for a large-span radial gate according to claim 4, characterized in that: The energy dissipation structure is a flexible belt.

6. A closed water test method for a large-span radial gate according to claim 1, characterized in that: After the design water head, horizontal displacement measurement is carried out at least three monitoring points of the radial gate and the temporarily closed area using a total station, with observations made every 2 hours, and the cumulative displacement changes of the radial gate and the temporarily closed area are recorded.

7. A closed water test method for a large-span radial gate according to claim 1, characterized in that: Before the graded water injection in S4, a color-changing anti-seepage cloth layer is attached to the water-stop area of ​​the radial gate to display the color of leakage.

8. A closed water test method for a large-span radial gate according to claim 7, characterized in that: Before S1, the contact surface between the radial gate water-stop rubber strip and the radial gate groove and the bottom sill is cleaned to remove mud, sand and debris to ensure the flatness and sealing performance of the water-stop contact surface.

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