A temporary sealing device for water tightness test of a large-span arc-shaped steel gate

Abstract

This invention relates to the field of water tightness testing technology for large-span arc-shaped gates, and proposes a temporary sealing device for water tightness testing of large-span arc-shaped steel gates. The device includes a support frame fixed to the base plate and located on the backwater side, a sealing template on the water-facing side, reinforcing components, and a sealing structure. The support frame is formed by welding steel sections to create a side baffle and is equipped with internal reinforcing components to improve rigidity. The sealing template is connected to the support frame and forms a closed area with the arc-shaped steel gate and gate pier to withstand the water pressure of the water tightness test. The reinforcing components are arranged between the support frame and the base plate, limiting frame displacement through rigid anchoring or gravity. The sealing structure is located at the joints of the sealing template, the junction of the sealing template and the gate pier, and the contact area between the sealing template and the base plate, achieving multiple seals to prevent leakage. This invention has high structural strength and reliable sealing, effectively resisting the water pressure of the water tightness test, reducing the risk of leakage, adapting to different gate opening sizes, and ensuring the safe and smooth conduct of the arc-shaped gate water tightness test.

Description

Technical Field

[0001] This invention relates to the field of water tightness testing technology for large-span arc-shaped gates, and in particular to a temporary sealing device for water tightness testing of large-span arc-shaped steel gates. Background Technology

[0002] As a core component of hydraulic engineering projects, the water tightness test of the arc-shaped gate is a crucial step in verifying its sealing performance and safety. The test observes whether there is any leakage between the arc-shaped gate and its slot, between its various components, and at the water seal device under a certain water pressure. This verifies whether the gate's sealing performance meets design requirements, ensuring that it effectively blocks water flow and prevents leakage during normal operation.

[0003] The water seal device is a key component to ensure the sealing of the arc gate. The water tightness test can directly examine the working state of the arc gate water seal under water pressure, check whether it can effectively prevent water flow, and promptly identify potential problems such as damage or insecure installation, so as to repair or replace it.

[0004] Water tightness tests can simulate the working environment of arc gates in actual operation, exposing potential problems that are not easily detected during construction under water pressure, so that timely measures can be taken to deal with them, avoid safety hazards in the actual operation of arc gates, and ensure the safe operation of flood diversion gate projects. Summary of the Invention

[0005] The purpose of this invention is to provide a temporary sealing device for water tightness testing of large-span arc-shaped steel gates, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A temporary sealing device for water tightness testing of a large-span arc-shaped steel gate includes: A support frame is fixed to the base plate and located on the backwater side. The support frame is formed by welding steel sections to form a side frame, and has internal reinforcing components to improve rigidity. A sealing template is installed on the water-facing side of the support frame and connected to the support frame to withstand water pressure. The sealing template, together with the arc-shaped steel gate and the gate pier, forms a closed area. Reinforcing components are installed between the support frame and the base plate, and the displacement of the support frame is restricted by rigid anchoring or gravity. The sealing structure is installed between adjacent sealing templates, at the joint between the sealing template and the gate pier, and at the contact point between the sealing template and the base plate.

[0007] Preferably, the support frame includes a bottom rectangular I-beam frame and eight support frames arranged along the width of the gate, forming a right-angled trapezoidal structure. The eight support frames are reinforced internally with two I-beams and three double-layer angle steels to form a grid structure. The bottom of the eight support frames is connected to each other by I-beams and fixedly connected to the bottom rectangular I-beam frame.

[0008] Preferably, the base plate has rebar holes evenly arranged throughout the entire perimeter of the bottom rectangular I-beam frame, and the bottom rectangular frame is fixed to the base plate after the rebar adhesive is filled and cured.

[0009] Preferably, after the sealing template is assembled, it is fixedly connected to the support frame; a concrete counterweight is provided upstream of the connection between the support frame and the sealing template.

[0010] Preferably, the support frame includes seven support frames, forming a right-angled triangular structure; the seven support frames are connected to several horizontal I-beams through diagonal supports, and the diagonal supports are Q235 steel pipes with a diameter of not less than 60mm and a wall thickness of not less than 5mm.

[0011] Preferably, the base plate has rebar holes at the bottom oblique angle of each right triangle of the supporting frame, and rebars are inserted into the rebar holes and fixedly connected to the supporting frame.

[0012] Preferably, after the sealing template is assembled, it is fixed to the concrete counterweight block by a rectangular frame composed of transverse threaded steel bars and longitudinal steel pipes; the bottom of the concrete counterweight block is reinforced by drilling holes in square tubes and installing reinforcing bars.

[0013] Preferably, the sealing structure includes multiple seals using structural sealant, leak-stopping agent, and SBS waterproof membrane at the joints of the sealing template, the joint between the sealing template and the gate pier, and the joint between the bottom of the sealing template and the base plate; a self-adhesive waterproof membrane is horizontally laid at the connection between the inner side of the sealing template and the gate pier, with an overlap length of not less than 30cm and extending not less than 50cm on both sides towards the gate pier; a waterproof layer is added at the bottom of the sealing template and adheres to the base plate.

[0014] Preferably, the method further includes stacking sandbags on the water-facing side of the sealing template for energy dissipation and erosion prevention. The sandbags are 1m wide and 1m high in the middle, and 2m wide and 3m high at the bottom on both sides.

[0015] Preferably, the test gate also includes a water level gauge installed on the side of the gate pier inside the test gate to monitor changes in the test water level.

[0016] The present invention discloses a temporary sealing device for water tightness testing of a large-span arc-shaped steel gate, which has the following beneficial effects.

[0017] This invention includes a support frame fixed to a base plate and located on the back side of the water-retaining structure, a sealing template on the front side, reinforcement components, and a sealing structure. The support frame is formed by welding steel sections to create a side baffle and is equipped with internal reinforcement components to improve rigidity. The sealing template is connected to the support frame and forms a closed area with the arc-shaped steel gate and gate pier to withstand the water pressure of the water tightness test. The reinforcement components are arranged between the support frame and the base plate, limiting the frame displacement through rigid anchoring or gravity. The sealing structure is set at the joints of the sealing template, the junction of the sealing template and the gate pier, and the contact area between the sealing template and the base plate, achieving multiple seals to prevent leakage. This invention has high structural strength and reliable sealing, effectively resisting the water pressure of the water tightness test, reducing the risk of leakage, adapting to different gate opening sizes, and ensuring the safe and smooth conduct of the arc-shaped gate water tightness test. Attached Figure Description

[0018] Figure 1 This is a side view of the temporary sealing device for a large-span arc-shaped steel gate water tightness test according to the present invention. Figure 2 This is a side view of the temporary sealing device for the water tightness test of a large-span arc-shaped steel gate according to Embodiment 2 of the present invention. Figure 3 This is a top view of the temporary sealing device for the water tightness test of a large-span arc-shaped steel gate according to Embodiment 2 of the present invention. Figure 4 This is a schematic diagram of the connection structure of the support frame, sealing template and reinforcement components in Embodiment 2 of the present invention; Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure of section AA; Figure 6 This is another schematic diagram of the connection structure of the supporting frame, sealing template and reinforcement components in Embodiment 2 of the present invention; Figure 7 This is a side view of the temporary sealing device for the water tightness test of a large-span arc-shaped steel gate according to Embodiment 3 of the present invention. Figure 8 This is a top view of the temporary sealing device for the water-tightness test of a large-span arc-shaped steel gate according to Embodiment 3 of the present invention.

[0019] In the attached diagram: 1. Support frame; 11. Rectangular I-beam frame; 12. Support frame; 13. Diagonal support; 2. Sealing template; 3. Reinforcing components; 31. Rebar installation; 32. Concrete counterweight; 33. Transverse threaded steel; 34. Longitudinal steel pipe; 35. Square tube; 4. Sealing structure; 5. Sandbag; 6. Gate pier; 7. Arc-shaped steel gate; 8. Water level gauge; 9. Base plate. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "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 this invention. Example 1

[0022] like Figure 1 As shown, a temporary sealing device for a water tightness test of a large-span arc-shaped steel gate includes: The support frame 1 is fixed on the base plate 9 and located on the back side. The support frame 1 is formed by welding steel sections to form a side frame. The support frame 1 is equipped with reinforcing components to improve rigidity. The sealing template 2 is set on the water-facing side of the support frame 1 and connected to the support frame 1 to withstand water pressure. The sealing template 2, the arc-shaped steel gate 7, and the gate pier 6 form a closed area. The reinforcement 3 is set between the support frame 1 and the base plate 9, and restricts the displacement of the support frame 1 by rigid anchoring or gravity. The sealing structure 4 is installed between adjacent sealing templates 2, at the joint between the sealing template 2 and the gate pier 6, and at the contact point between the sealing template 2 and the bottom plate 9.

[0023] In this embodiment, preferably, the sealing structure 4 includes multiple seals using structural sealant, leak-stopping agent, and SBS waterproof membrane at the joints of the sealing template 2, the joint between the sealing template 2 and the gate pier 6, and the joint between the bottom of the sealing template 2 and the base plate 9; a self-adhesive waterproof membrane is laid laterally at the connection between the inner side of the sealing template 2 and the gate pier 6, with an overlap length of not less than 30cm and extending not less than 50cm on both sides towards the gate pier 6; a waterproof layer is added to the bottom of the sealing template 2 and adheres to the base plate 9.

[0024] Preferably, the method further includes stacking sandbags 5 on the water-facing side of the sealing template 2 for energy dissipation and erosion prevention. The sandbags 5 have a width of 1m and a height of 1m in the middle, and a bottom width of 2m and a height of 3m on both sides.

[0025] Preferably, the test gate also includes a water level gauge 8 installed on the side of the gate pier 6 inside the test gate hole to monitor changes in the test water level. Example 2

[0026] Based on Example 1, please refer to Figure 2-6In this embodiment, as a preferred embodiment, the support frame 1 includes a bottom rectangular I-beam frame 11 and eight support frames 12 arranged along the width direction of the gate, forming a right-angled trapezoidal structure. The eight support frames 12 are reinforced internally with two I-beams and three double-layer angle steels to form a grid structure. The bottom of the eight support frames 12 is connected to each support frame 12 by I-beams and fixedly connected to the bottom rectangular I-beam frame 11.

[0027] In this embodiment, the support frame 1 is formed by welding together I-beams cut to different sizes. Specifically, as shown below... Figure 2 and Figure 5 The right-angled trapezoidal structure of the support frame 12 shown is composed of four horizontal H-beams and one diagonal H-beam with their lengths decreasing from bottom to top, welded together. Two H-beams are welded vertically on one side. Double-layer angle steel is welded inside the rectangle formed by the adjacent H-beams for reinforcement, ultimately forming a grid structure. H-beams are welded to the outside of the eight diagonal braces of the support frame 12 to enhance the overall stability of the support frame 1.

[0028] like Figure 2 and Figure 6 As shown, in this embodiment, preferably, the bottom plate 9 has uniformly arranged anchoring holes 31 around the entire periphery of the bottom rectangular I-beam frame 11, and after the anchoring adhesive 31 is filled and cured, the bottom rectangular frame is fixed to the bottom plate 9.

[0029] like Figure 3 , Figure 4 and Figure 6 As shown, in this embodiment, preferably, the sealing template 2 is fixedly connected to the support frame 1 after assembly; a concrete counterweight block 32 is provided upstream of the connection between the support frame 1 and the sealing template 2.

[0030] In this embodiment, when fabricating a temporary sealing device for a water tightness test of a large-span arc-shaped steel gate: (1) Cut the I-beams and weld them on the ground to form the bottom rectangular I-beam frame 11, in preparation for the subsequent hoisting of the overall support system; (2) Cut the I-beams and weld them on the ground to form eight support frames 12. At this time, all eight support frames 12 are triangular skeleton structures. (3) According to the installation position and outer contour of the bottom rectangular I-beam frame 11, use an electric drill and water drills of different diameters to drill holes for the rebar 31 on the bottom plate 9; (4) Hoist the bottom rectangular I-beam frame 11 and the eight-way support frame 12 to the installation position, and weld the bottom of the eight-way support frame 12 to the rectangular I-beam frame 11 by adding I-beams; (5) After (4), weld three I-beams on one side of each of the eight support frames 12 to form a right-angled trapezoidal structure to enhance the overall stability of the frame structure; (6) Based on (5), two H-beams are vertically welded on one side of the right trapezoidal structure, and double-layer angle steel is welded inside the rectangle formed by the adjacent H-beams for reinforcement; (7) Based on (6), two I-beams are welded to the outside of the diagonal brace of the right trapezoidal structure for reinforcement; (8) Based on (7), use the anchoring holes (3) drilled to reinforce the anchoring 31, that is, fix the bottom rectangular I-beam frame 11 to the installation position with anchoring 31. Specifically: First, use a high-pressure water gun to clean the dust, debris and other debris in the anchoring holes to ensure that the anchoring holes are clean and dry, so as to improve the bonding strength of the anchoring 31; then, finely adjust the plane position of the bottom rectangular I-beam frame 11 so that it matches the position designed in the drawing, and inject the anchoring 31 adhesive into the cleaned anchoring holes. The amount of adhesive should be moderate, generally about 2 / 3 of the hole depth; finally, insert anchor bars and steel pipes respectively, insert one end into the anchoring hole, insert the depth into the concrete not less than 500mm, and weld the other end to the bottom rectangular I-beam frame 11 for surface fixation. During the insertion of the steel bars, the steel bars should be rotated so that the anchoring 31 adhesive is evenly attached to the surface of the steel bars and the hole wall. For any holes where the adhesive 31 is insufficient, apply additional adhesive and cure as required, ensuring the rebar is not disturbed during the process. After curing, conduct a pull-out test to verify that the bond strength of the rebar 31 meets the requirements. Once the test confirms that the requirements are met, weld the rebar 31 to the I-beam on both sides, with a weld length of not less than 100mm. The support frame 1 is now complete.

[0031] (9) Downstream of the supporting frame 1, the sealing template 2 is hoisted. The sealing template 2 consists of two layers, with seven pieces in each layer spliced ​​together to form the sealing surface of the temporary sealing facility for the test gate hole. It should be noted that: before hoisting the sealing template 2, sealing materials and waterproof membranes are used to seal the bolt holes of the sealing template 2. The sealing template 2 is connected and reinforced with matching high-strength bolts. The installation of the sealing template 2 should be firm and stable, and the joints should be tight. The sealing template 2 is welded to the bottom rectangular I-beam frame 11 as a whole. During the welding process, the welding process parameters are strictly controlled to ensure that the weld quality meets the specifications. The weld should be full, without cracks, slag inclusions and other defects; the fillet weld is a double-sided continuous weld with a weld height of 8mm; the butt weld is a single-sided continuous weld; the welding parts where multiple profiles intersect are connected by node plates.

[0032] (10) After completing the assembly of the sealing template 2, hoist the concrete counterweight 32. It is important to ensure that the concrete counterweight 32 is placed stably and firmly, and confirm that the contact surface between the counterweight and the bottom plate 9 is stable, without any suspension or local pressure. One side should be tightly attached to the bottom rectangular I-beam frame 11 to ensure the stability and safety of the sealing structure; (11) After the concrete counterweight block 32 is hoisted, sealing construction is carried out. Special attention: In order to ensure the airtightness of the test device, the tie rod holes of the sealing template 2, the connection joints between the sealing templates 2, and the connection between the sealing template 2 and the gate pier 6 are sealed with structural sealant + leak-stopping agent + SBS waterproof membrane. Self-adhesive waterproof membrane is laid horizontally on all the connection parts between the inner side of the sealing template 2 and the gate pier 6. The horizontal and vertical overlap lengths are strictly controlled to be more than 30cm. The two sides are extended 50cm towards the gate pier 6 for reinforcement. A waterproof layer is added to the bottom of the sealing template 2 and tightly connected to the bottom plate 9. The bottom joint is sealed with special attention. (12) After the sealing construction is completed, sandbags 518 with a width of 1m and a height of 1m in the middle and a width of 2m and a height of 3m on both sides are stacked on the water-facing side of the sealing template 2 to dissipate energy and prevent water flow from damaging the sealing material. A water level gauge 819 is set on the side of the gate pier 6 inside the test gate to facilitate real-time observation of the test water level changes; (13) After completing all the above work, close the arc-shaped working steel gate of the gate to be tested. The downstream side is sealed by the water-stopping device between the gate and the gate slot, and the upstream side is sealed by the temporary sealing facility that has been erected and reinforced. The temporary sealing facility should have sufficient strength and stability, be able to withstand the test water head pressure, have the conditions for water tightness test, and be able to carry out water tightness test. Example 3

[0033] Based on Example 1, please refer to Figures 7 to 8 In this embodiment, preferably, the support frame 1 includes seven support frames 12, forming a right-angled triangular structure; the seven support frames 12 are connected to several horizontal I-beams through diagonal supports 13, and the diagonal supports 13 are Q235 steel pipes with a diameter of not less than 60mm and a wall thickness of not less than 5mm.

[0034] Specific examples Figure 7 As shown, the right-angled triangular structure formed by the seven support frames 12 is reinforced with two I-beams, one horizontal and one diagonal.

[0035] In this embodiment, preferably, the base plate 9 has a rebar 31 hole at the bottom oblique angle of each right triangle of the support frame 1, and rebars are inserted into the rebar 31 holes and fixedly connected to the support frame 1.

[0036] like Figure 8As shown, in this embodiment, preferably, after the sealing template 2 is assembled, it is fixed to the concrete counterweight block 32 by a rectangular frame formed by a transverse threaded steel bar 33 and a longitudinal steel pipe 34; the bottom of the concrete counterweight block 32 is reinforced by drilling holes in square tubes 35 and planting reinforcing bars 31.

[0037] In this embodiment, when fabricating a temporary sealing device for a water tightness test of a large-span arc-shaped steel gate: (1) Measure and mark out the placement position of the concrete counterweight block 32 and the installation position of the sealing template 2 on the base plate 9; (2) Based on the placement of the concrete counterweight 32 laid out in (1), four layers of concrete counterweight 32 are pre-stacked; (3) Based on the installation position of the sealing template 2 laid out in (1), the sealing template 2 is assembled downstream of the concrete counterweight block 32 placed in (2). Seven 2*3.3m sealing templates 2 are arranged in a single layer, with the sealing templates 2 on both sides close to the inner side of the gate pier 6. The sealing templates 2 are connected and fixed with each other using matching high-strength bolts. After the first layer of sealing templates 2 is assembled, it is adjusted to the pre-set position, with the back of the sealing template 2 close to the concrete counterweight block 32; (4) The sealing template 2 adjusted in (3) above is fixedly connected to the concrete counterweight block 32 as a whole by using the φ20 transverse threaded steel bar 33 and the longitudinal steel pipe 34 that are matched with the sealing template 2 to form a circumferential reinforcement measure. (5) On the basis of the concrete counterweight 32 placed in (2), the remaining three layers of concrete counterweight 32 are stacked on top and the second layer of sealing template 2 is assembled on top of the sealing template 2 reinforced in (4). The second layer of sealing template 2 is connected and reinforced with the first layer of sealing template 2 using matching bolts. The connection and fixation of the sealing template 2 and the concrete counterweight 32 are further completed, and a temporary sealing system is initially formed; (6) Take anti-slip and fixation measures at the bottom of the first layer of concrete counterweight 32 placed in (2): add a square tube 35 at the bottom of the first layer of concrete counterweight 32, with one side tightly attached to the concrete counterweight 32 and the other side reinforced by the anchoring bar 31. (7) After the temporary sealing system of (5) is completed, due to space limitations, the support frame 1 is assembled and welded separately at the test gate hole to form a right-angled triangular support frame 1. (8) On the upstream side of the temporary sealing system sealing template 2 formed in (5), seven I-beams are evenly arranged and fixed to the sealing template 2 by direct welding; (9) An oblique support 13 I-beam is arranged at the corresponding position of the I-beam in (8) above, and the bottom is fixed by welding with I-beams to form a support frame 1 with a right-angled triangle structure; (10) A transverse I-beam and a diagonal I-beam are used to reinforce the support frame 1 formed in (9) above. (11) Two I-beams are added to the inclined surface of the support frame 1 formed in (9) to connect the seven support triangular frames to form the overall support frame 1. (12) The contact point between the inclined support 13 I-beam formed by the support frame 1 in (11) and the base plate 9 is one of the main stress points and reinforcement measures need to be taken. Specifically, five 0.19m×3.3m templates are set on the outside of the inclined support 13 I-beam. The templates are connected by matching high-strength bolts to form a whole. The template whole connects and welds the lower part of the I-beam into a whole. Drilled rebar 31 is added to the connection between the template and the I-beam and the base plate 9 for reinforcement. Then, a layer of concrete counterweight block 32 is placed on the upstream side of the template to enhance the support force of the inclined brace and prevent the inclined brace from being displaced and deformed due to excessive lateral pressure during the test. (13) After completing the reinforcement work in (12) above, carry out sealing construction. Special note: In order to ensure the sealing of the test device, the tie rod holes of the sealing template 2, the connection joints between the sealing templates 2, and the connection between the sealing template 2 and the gate pier 6 are sealed with structural sealant + leak-stopping agent + SBS waterproof membrane. The inner side of the sealing template 2 and the connection between the gate pier 6 are all horizontally laid with self-adhesive waterproof membrane, and the horizontal and vertical overlap lengths are strictly controlled to be more than 30cm. Both sides are extended 50cm towards the gate pier 6 for reinforcement. A waterproof layer is added to the bottom of the sealing template 2 and tightly connected to the bottom plate 9. The bottom joint is sealed with special attention. (14) After completing the sealing work in (13) above, sandbags 5 with a width of 1m and a height of 1m in the middle and a width of 2m and a height of 3m on both sides of the sealing template 2 are stacked on the water-facing side to dissipate energy and prevent water flow from damaging the sealing material. A water level gauge 8 is set on the side of the gate pier 6 inside the test gate to facilitate real-time observation of the test water level changes; (15) After completing all the above work, close the arc-shaped working steel gate of the gate to be tested. The downstream side is sealed by the water-stopping device between the gate and the gate slot, and the upstream side is sealed by the temporary sealing facility that has been erected and reinforced. The temporary sealing facility should have sufficient strength and stability, be able to withstand the test water head pressure, have the conditions for water tightness test, and be able to carry out water tightness test.

[0038] This application discloses a temporary sealing device for the water tightness test of a large-span arc-shaped steel gate 7, aiming to provide an efficient and safe temporary sealing solution for the water tightness test of the large-span arc-shaped steel gate 7. The core difference between the temporary sealing devices for the water tightness test of a large-span arc-shaped steel gate 7 in Embodiments 2 and 3 of this application lies in the design of the I-beam structure, the internal reinforcement method of the supporting triangular frame, the reinforcement method of the I-beam frame and the base plate 9, and the template reinforcement method. Among them, the temporary sealing device for the water tightness test of a large-span arc-shaped steel gate 7 in Embodiment 2 has better performance. Specifically, the I-beam structure in Embodiment 2 has been optimized, adopting a combination of "rectangular I-beam frame 11 + triangular I-beam frame" to form a right-angled trapezoidal support system, which improves the deformation resistance and load-bearing strength. In terms of internal reinforcement of the supporting frame 1, this scheme introduces a triangular support structure, forming a stable triangular grid through multi-point welding, effectively dispersing the water pressure load and enhancing the overall deformation resistance performance. The I-beam frame and base plate 9 are reinforced by drilling 31 holes for rebar installation, installing 31 rebars, filling with 31 adhesive, and then welding them together to form a stable rigid connection, ensuring that they do not loosen or shift under high pressure. The sealing template 2 is reinforced by direct welding to the support system, which, together with the support of the triangular frame, achieves a high-precision fit of the sealing surface.

[0039] In contrast, the temporary sealing device for the large-span arc-shaped steel gate 7 in Example 3 has weak overall stability, deformation resistance, and load-bearing strength in its support frame 1. The support frame 1 and base plate 9 are only locally reinforced, and the triangular support frame lacks internal triangular mesh reinforcement, making it prone to localized stress concentration and minor displacement under water pressure. The sealing template 2 relies on the reinforcement of concrete counterweights 32, resulting in insufficient sealing stability and a risk of leakage in practical applications.

[0040] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Substitutions may include replacements for some structures, devices, or method steps, or may be complete technical solutions. Equivalent substitutions or modifications made to the technical solutions and inventive concepts of the present invention should all be covered within the scope of protection of the present invention.

Claims

1. A temporary sealing device for a water tightness test of a large-span arc-shaped steel gate, characterized in that, include: A support frame is fixed to the base plate and located on the backwater side. The support frame is formed by welding steel sections to form a side frame, and has internal reinforcing components to improve rigidity. A sealing template is installed on the water-facing side of the support frame and connected to the support frame to withstand water pressure. The sealing template, together with the arc-shaped steel gate and the gate pier, forms a closed area. Reinforcing components are installed between the support frame and the base plate, and the displacement of the support frame is restricted by rigid anchoring or gravity. The sealing structure is installed between adjacent sealing templates, at the joint between the sealing template and the gate pier, and at the contact point between the sealing template and the base plate.

2. The temporary sealing device for water tightness testing of a large-span arc-shaped steel gate according to claim 1, characterized in that, The supporting frame includes a bottom rectangular I-beam frame and eight support frames arranged along the width of the gate, forming a right-angled trapezoidal structure. The eight support frames are reinforced internally with two I-beams and three double-layer angle steels to form a grid structure. The bottom of the eight support frames is connected to each other by I-beams and fixedly connected to the bottom rectangular I-beam frame.

3. The temporary sealing device for water tightness testing of a large-span arc-shaped steel gate according to claim 2, characterized in that, The base plate has rebar holes evenly arranged throughout the entire perimeter of the bottom rectangular I-beam frame. After the rebar holes are filled with adhesive and cured, the bottom rectangular frame is fixed to the base plate.

4. The temporary sealing device for water tightness testing of a large-span arc-shaped steel gate according to claim 2, characterized in that, After the sealing template is assembled, it is fixedly connected to the support frame; a concrete counterweight is provided on the upstream side of the support frame connected to the sealing template.

5. The temporary sealing device for water tightness testing of a large-span arc-shaped steel gate according to claim 1, characterized in that, The supporting frame includes seven support frames, forming a right-angled triangular structure. The seven support frames are connected to several horizontal I-beams through diagonal supports. The diagonal supports are Q235 steel pipes with a diameter of not less than 60mm and a wall thickness of not less than 5mm.

6. The temporary sealing device for water tightness testing of a large-span arc-shaped steel gate according to claim 5, characterized in that, The base plate has rebar holes at the bottom oblique angle of each right triangle of the supporting frame, and rebars are inserted into the rebar holes and fixedly connected to the supporting frame.

7. The temporary sealing device for water tightness testing of a large-span arc-shaped steel gate according to claim 5, characterized in that, After the sealing template is assembled, it is fixed to the concrete counterweight block by a rectangular frame composed of transverse threaded steel bars and longitudinal steel pipes; the bottom of the concrete counterweight block is reinforced by drilling holes in square tubes and installing reinforcing bars.

8. The temporary sealing device for water tightness testing of a large-span arc-shaped steel gate according to claim 1, characterized in that, The sealing structure includes multiple seals using structural sealant, leak-stopping agent, and SBS waterproof membrane at the joints of the sealing template, the joint between the sealing template and the gate pier, and the joint between the bottom of the sealing template and the base plate. Self-adhesive waterproof membrane is laid laterally at the connection between the inner side of the sealing template and the gate pier, with an overlap length of not less than 30cm and extending not less than 50cm on both sides towards the gate pier. A waterproof layer is added to the bottom of the sealing template and adheres to the base plate.

9. The temporary sealing device for water tightness testing of a large-span arc-shaped steel gate according to claim 1, characterized in that, It also includes stacking sandbags on the water-facing side of the sealing template for energy dissipation and erosion prevention. The sandbags are 1m wide and 1m high in the middle, and 2m wide and 3m high at the bottom on both sides.

10. The temporary sealing device for water tightness testing of a large-span arc-shaped steel gate according to claim 1, characterized in that, It also includes installing a water level gauge on the side of the gate pier inside the test gate to monitor changes in the test water level.

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