Aqueduct structure and reinforcing and repairing construction method

Abstract

This invention belongs to the field of water conservancy engineering technology, specifically relating to an aqueduct structure and a reinforcement and maintenance construction method. The aqueduct structure includes a steel aqueduct formed by a support frame and steel pipes. The support frame includes two sets of support rods connected by several cross braces to form a bottom support. A column is welded above the support rods, and a top rod is welded to the top of the column, forming a side enclosure. The bottom support and the side enclosure together constitute the support frame. A receiving space is formed between the two sets of side enclosures, in which a steel pipe is installed, with both ends of the steel pipe extending out of the receiving space to form extensions. Support legs are welded to the bottom end of the bottom support. The reinforcement and maintenance construction method is based on the steel aqueduct and mainly includes welding, transportation and hoisting, and sealing connections. This invention is easy to manufacture, eliminates the need for a full-span support structure, minimizes traffic impact on existing lines, and provides excellent seepage prevention, meeting both deformation and seepage prevention requirements.

Description

Technical Field

[0001] This invention belongs to the field of water conservancy engineering technology, specifically relating to an aqueduct structure and a reinforcement and maintenance construction method. Background Technology

[0002] An aqueduct is an elevated water channel that carries water across rivers, canals, valleys, depressions, and roads. It is commonly used for irrigation, flood control, and sediment removal; large aqueducts can also be navigable. Aqueducts are primarily constructed using materials such as masonry, concrete, and reinforced concrete. Currently, in some rural and urban areas of my country, many aqueducts built in the last century are still used for farmland irrigation and drainage. Most of these aqueducts are constructed of concrete, and their common structural forms include... Figure 1-2 As shown, the aqueduct mainly consists of a support column 1 and a channel body 2, with the channel body having a U-shaped or rectangular cross-sectional shape. Some aqueducts span roads. Due to the continuous raising and paving of roads in recent years, the clearance between the channel body and the road surface in some aqueducts is relatively small. Sometimes, drivers of oversized vehicles are not paying attention and collide with the channel section above the road, causing damage to the aqueduct and safety accidents. Subsequent repairs using concrete pouring require installing a full-span support frame on the road surface, necessitating formwork erection, pouring, and formwork removal, resulting in a long construction period and significant impact on existing traffic flow. Moreover, due to the limitations of the channel structure, the clearance cannot be changed when using concrete pouring, still resulting in a small clearance and posing a safety hazard. Therefore, for the repair of aqueducts spanning roads, it is necessary to research an aqueduct structure that can be constructed quickly, has minimal impact on existing traffic flow, is easy to fabricate, and can increase clearance. Summary of the Invention

[0003] To address the problems existing in the prior art, an aqueduct structure and a reinforcement and maintenance construction method are provided.

[0004] The technical solution adopted by this invention to solve its technical problem is:

[0005] This technical solution proposes an aqueduct structure, including a steel aqueduct formed by a support frame and steel pipes; the support frame includes two sets of support rods, with several cross braces connecting the two sets of support rods to form a bottom support; several columns are welded above the support rods, and top rods are welded to the top of the columns, with the columns and top rods forming side enclosures; the bottom support and the side enclosures together constitute the support frame; an accommodating space is formed between the two sets of side enclosures, and the steel pipes are installed in this accommodating space, with the steel pipes welded and fixed above the bottom support, and both ends of the steel pipes extending through the accommodating space to form extensions; support legs are welded to the bottom end of the bottom support for raising the bottom support.

[0006] Preferably, several reinforcing ribs are welded between the cross braces; several diagonal braces are welded between the columns.

[0007] Preferably, an end plate is detachably connected to the extension of the steel pipe. The end plate is formed by two sets of half end plates joined together. A through hole for the steel pipe to pass through is opened in the center of the end plate. Two sets of vertically arranged fixing members are welded to one side of the end plate. Each set of fixing members is provided with two sleeves. The two sleeves are welded to the two sets of half end plates respectively. Fastening bolts are passed between the sleeves to fix the end plate to the steel pipe.

[0008] Preferably, the support frame is further provided with several sets of top support mechanisms for driving the end plate to move. The top support mechanism includes a fixing nut welded to the support frame, and the fixing nut is threadedly connected to a screw rod. When the screw rod is rotated, the screw rod can drive the end plate to move.

[0009] Preferably, a rubber waterstop is provided on the other side of the end plate, and the cross-sectional shape of the rubber waterstop is a U-shaped structure adapted to the cross-section of the groove.

[0010] Preferably, the half-end plate has a sealing strip on its side.

[0011] This invention also proposes a method for reinforcing and repairing aqueducts, comprising the following steps:

[0012] S1: Remove the corresponding section of the groove above the road and clean the top of the corresponding frame column; at the same time, clean the end faces of the existing grooves on both sides of the corresponding section of the groove.

[0013] S2: Bond a geomembrane to the cleaned existing trench end face. The geomembrane is a U-shaped structure that matches the trench cross-section.

[0014] S3: The steel aqueduct is prefabricated and welded in the factory according to the design dimensions; the steel aqueduct is transported to the construction site and then hoisted, with the legs placed on top of the frame columns and the extensions of the steel pipes extending into the existing trough body on both sides.

[0015] S4: Install end plates on the extension of the steel pipe and pre-fix the half end plates with fastening bolts; tighten the screws to push the end plates to the end face of the trench body, and the end plates are tightly attached to the end face of the trench body. At this time, the rubber waterstop is tightly pressed onto the geomembrane to form a seepage-proof sealing layer; then tighten the fastening bolts to fix the top for a second time, so as to achieve a tight connection between the end plates and the steel pipe.

[0016] S5: A baffle is installed in the existing trench, so that one side of the baffle abuts against the end of the steel pipe; a casting zone is formed between the baffle and the end plate.

[0017] S6: Pour impermeable concrete in the pouring area to form a concrete layer that encloses the extension of the steel pipe.

[0018] S7: Remove the baffle after the concrete has been poured and cured;

[0019] S8: Apply a polyurea coating to the end face of the formed concrete layer.

[0020] Preferably, the method for supporting the baffle in S5 is as follows: the baffle is supported by an enclosure support system, wherein the enclosure support system includes a first pair of tie rods positioned at the bottom of the trench and a second pair of tie rods positioned at the top of the trench, the first pair of tie rods and the second pair of tie rods are connected and fixed by tie rods; the top of the second pair of tie rods is threaded with a pressing bolt, the bottom end of the pressing bolt is rotatably connected to a channel steel, the channel steel is used to press and clamp onto the top of the baffle; a support frame is also welded to one side of the second pair of tie rods, the support frame is a U-shaped structure, a horizontal plate is welded on the support frame, and five sets of side pressure bolts are threaded on the horizontal plate and the support frame, the side pressure bolts form a five-point support system, used to make the baffle rest against the end of the steel pipe;

[0021] The specific usage method of the enclosure scaffolding system is as follows:

[0022] S51: Select a suitable position, install the first pair of tie rods at the bottom of the tank body and the second pair of tie rods at the top of the tank body. The first pair of tie rods and the second pair of tie rods are connected and fixed by tie rods to achieve a fixed connection between the first pair of tie rods and the tank body.

[0023] S52: Install baffles in the tank and adjust the baffles to the appropriate position;

[0024] S53: Tighten the side pressure bolts to press the baffle against the end of the steel pipe;

[0025] S54: Tighten the lowering bolt to press the baffle against the inner wall of the bottom of the tank.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] 1. This device uses a steel aqueduct instead of a concrete structure. Firstly, it is easier to manufacture, as it can be prefabricated in a factory, eliminating the need for on-site casting and saving construction time. Secondly, because the steel aqueduct is prefabricated, installation is faster, eliminating the need for full-span scaffolding and minimizing disruption to existing traffic. Furthermore, the steel aqueduct incorporates steel pipes connected to the trough body, forming a steel pipe-concrete trough combination. Compared to a concrete trough, the steel aqueduct is lighter, and the support legs at the bottom raise the steel pipes, increasing the clearance between the support structure and the road surface, improving height limits, facilitating the passage of oversized vehicles, and reducing the likelihood of subsequent accidents.

[0028] 2. The extension of the steel pipe is equipped with end plates. The end plates adopt a structure of two sets of mating half-end plates, which is convenient for disassembly and installation. The two sets of half-end plates with sealing strips are clamped on the steel pipe to achieve a sealed connection between the end plates and the steel pipe. The end plates rest against the end face of the trench body. A geomembrane and a rubber waterstop are set between the end plates and the end face of the trench body to form a third anti-seepage layer. In addition, the end plates can also serve as formwork in subsequent construction procedures, which is beneficial for concrete pouring.

[0029] 3. To ensure a tight fit between the end plate and the trough body, a top support mechanism is also provided on the steel aqueduct to drive the end plate to move. In this invention, the top support mechanism adopts a structure of fixed nuts and screws. By setting up 4 sets of top support mechanisms, the four corners of the end plate can be supported by turning the screws during use, thereby achieving a tight contact between the end plate and the trough body. Moreover, the four-point top support method has the advantage of uniform force distribution.

[0030] 4. In this invention, a geomembrane is bonded to the end face of the trench body, which can provide a relatively flat base surface, which is conducive to the sealing connection with the rubber waterstop. In addition, due to the thermal expansion and contraction of the trench body in all seasons, the length of the base material changes. By setting the rubber waterstop, the expansion and contraction can be provided, which can meet both the deformation requirements and the seepage prevention requirements.

[0031] 5. A pouring zone is formed between the end plate and the steel pipe end. Impermeable concrete is poured in the pouring zone to form a concrete layer, which can serve as a second impermeable layer and further improve the impermeability. A polyurea coating is sprayed on the end face of the concrete layer to form the first impermeable layer. In total, three layers of impermeability are formed, which can greatly improve the impermeability.

[0032] 6. During concrete pouring, baffles are installed in the trench body, serving as inner and outer formwork along with end plates to facilitate pouring. The baffles are fixed by a retaining support system, which uses a structure of first pair of tie rods, second pair of tie rods, and tie rods. This facilitates fixing to the trench body, forming a carrier for the baffles. The structure is simple and easy to construct. In addition, the retaining support system has downward and side bolts for easy support of the baffles, ensuring their fixation and facilitating worker operation and adjustment. Furthermore, the side bolts are arranged in a five-point configuration, resulting in uniform force distribution on the baffles and a more stable fixation effect. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a front view of a concrete aqueduct structure in the prior art.

[0035] Figure 2 yes Figure 1 Side view of the concrete aqueduct structure.

[0036] Figure 3 This is the main view of the steel aqueduct structure in this invention.

[0037] Figure 4 yes Figure 3 A top view showing the connection between the bottom support and the steel pipe of the central steel structure aqueduct.

[0038] Figure 5 This is a left view of the end plate in this invention.

[0039] Figure 6 This is a right view of the end plate in this invention.

[0040] Figure 7 yes Figure 1 A schematic diagram of the structure after the tank body awaiting repair has been removed.

[0041] Figure 8 This is a schematic diagram of the steel aqueduct after installation.

[0042] Figure 9 This is a partially enlarged schematic diagram showing the fit between the lower end plate, the steel aqueduct, and the aqueduct body in the main view direction.

[0043] Figure 10 yes Figure 9 Enlarged schematic diagram of the structure of region B in the middle.

[0044] Figure 11 This is a schematic diagram of the baffle installed in the tank.

[0045] Figure 12 This is a partially enlarged schematic diagram showing the fit between the steel aqueduct, end plates, and baffles from a top-down view.

[0046] Figure 13 This is a schematic diagram of the structure after the end face of the trench is cleaned and the geomembrane is pasted on.

[0047] Figure 14 This is a schematic diagram of the structure after the impermeable concrete has been poured in the pouring area.

[0048] Figure 15 This is a schematic diagram of the structure after the concrete layer end face is sprayed with a polyurea coating.

[0049] Figure 16 This is a structural diagram of the enclosure support system.

[0050] Figure 17 This is a schematic diagram of the structure of the retaining support system installed behind the trench.

[0051] Explanation of reference numerals in the attached figures:

[0052] 1-Frame column; 2-Trench body; 201 Geomembrane; 3-Support rod; 31-Horizontal brace; 32-Reinforcing rib; 4-Top rod; 5-Column; 6-Diagonal brace; 7-Outer leg; 8-Steel pipe; 9-Fixing nut; 10-Screw rod; 11-Locking nut; 12-End plate; 121-Half end plate; 122-Through hole; 13-Rubber waterstop; 14-Sleeve; 15-Fastening bolt; 16-Sealing strip; 17-Baffle; 18-First pair of tie rods; 19-Second pair of tie rods; 20-Pair of tie rods; 21-High-strength nut; 22-Protrusion; 23-Pressing bolt; 24-Channel steel; 25-Support frame; 26-Horizontal plate; 27-Side pressure bolt; 28-Flexible gasket; 29-Concrete layer; 30-Polyurea coating. Detailed Implementation

[0053] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0054] In the description of this invention, it should be understood that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component present simultaneously. When a component is considered to be "set" on another component, it can be directly set on the other component or there may be an intermediate component present simultaneously.

[0055] Furthermore, terms such as “long,” “short,” “inner,” and “outer” indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings. They are used only for the purpose of describing the present invention and are not intended to indicate or imply that the device or component referred to must have this specific orientation or operate in a specific orientational configuration. Therefore, they should not be construed as limitations of the present invention.

[0056] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection of the present invention.

[0057] like Figure 3-15 As shown, this embodiment proposes an aqueduct structure, including a steel aqueduct formed by a support frame and steel pipes 8; the support frame includes two sets of support rods 3, and several cross braces 31 are connected between the two sets of support rods 3 to form a bottom support, which is a rectangular frame structure; several columns 5 are welded above the support rods 3, and top rods 4 are welded to the top of the columns 5, forming side enclosures with the columns 5 and the top rods 4; the bottom support and the side enclosures together constitute the support frame; in this embodiment, the support rods 3, columns 5, and top rods 4 can all be made of square tubing to reduce the overall weight.

[0058] A receiving space is formed between the two sets of side barriers. A steel pipe 8 is installed in this receiving space to connect the two sides of the trough 2 and transport water. The steel pipe 8 is welded and fixed above the bottom support. Both ends of the steel pipe 8 extend through the receiving space to form extensions for connecting with the trough 2. The bottom support is welded with outriggers 7 to raise the bottom support. In turn, the outriggers 7 can raise the steel pipe 8, which increases the clearance between the bottom support and the road surface, improves the height restriction standard, facilitates the smooth passage of some over-height vehicles, and reduces the possibility of subsequent safety accidents.

[0059] To improve overall strength, several reinforcing ribs 32 are welded between the horizontal braces 31; several diagonal braces 6 are welded between the columns 5.

[0060] An end plate 12 is detachably connected to the extension of the steel pipe 8. One side of the end plate 12 is used to support the end face of the groove body 2. The end plate 12 is formed by two sets of half end plates 121 joined together. A through hole 122 for the steel pipe 8 to pass through is opened in the center of the end plate 12. Two sets of vertically arranged fixing members are welded to one side of the end plate 12. Each set of fixing members is provided with two sleeves 14. The two sleeves 14 are respectively welded to the two sets of half end plates 121. Fastening bolts 15 are passed between the sleeves 14. The fastening nuts on them are screwed on to fix the end plate 12 to the steel pipe 8.

[0061] The above design of end plate 12 can bring the following advantages:

[0062] The extension of the steel pipe 8 is fitted with an end plate 12. The end plate 12 adopts a structure of two sets of mating half end plates 121, which is convenient for disassembly and installation. The two sets of half end plates 121 with sealing strips 16 are clamped on the steel pipe 8 to achieve a sealed connection between the end plate 12 and the steel pipe 8. The end plate 12 rests against the end face of the trench body 2. A geomembrane 201 and a rubber waterstop 13 are set between the end plate 12 and the end face of the trench body 2 to form a third anti-seepage layer. In addition, the end plate 12 can also serve as a formwork in subsequent construction procedures, eliminating the need for additional formwork and facilitating concrete pouring.

[0063] The sleeve 14 can be made from a discarded pipe body; it should be noted that the half end plate 121 has a sealing strip 16 on its side. The sealing strip 16 is set on the side of the half end plate 121 that contacts the steel pipe 8. By setting the sealing strip 16, when the end plate 12 is clamped on the steel pipe 8, the sealing strip 16 can ensure the sealed connection between the end plate 12 and the steel pipe 8.

[0064] The support frame is also equipped with several sets of top support mechanisms for moving the end plate 12. Each top support mechanism includes a fixing nut 9 welded to the support frame, and a screw 10 threadedly connected to the fixing nut 9. When the screw 10 is rotated, it drives the end plate 12 to move, thereby tightly pressing the end plate 12 against the end face of the groove body 2. In this embodiment, four sets of top support mechanisms are provided on each side, two sets on the top and two on the bottom, forming four-point support, which has the advantage of uniform force distribution.

[0065] A locking nut 11 can also be threaded onto the screw 10. When the screw 10 is tightened, tightening the locking nut 11 can prevent loosening and ensure the supporting effect.

[0066] To ensure a tight seal between end plate 12 and the end face of groove body 2, we implemented the following design:

[0067] A rubber waterstop 13 is provided on the other side of the end plate 12. The rubber waterstop 13 is fixed to the side of the end plate 12 by adhesive. The cross-sectional shape of the rubber waterstop 13 is a U-shaped structure that matches the cross-section of the trench body 2. The rubber waterstop 13 can be directly supported at the end face of the trench body 2. In this embodiment, considering that the trench body 2 has been used for many years, when the damaged section of the trench body 2 is removed, the end faces of the two sides of the trench body 2 may not be flat enough, affecting the adhesion of the rubber waterstop 13. Therefore, we can also adopt the following measures: First, clean the end face of the trench body 2 and grind it, then apply adhesive, and then bond the geomembrane 201 to the end face of the trench body 2. It should be noted that in order to ensure the sealing between the rubber waterstop 13 and the geomembrane 201, before the rubber waterstop 13 and the geomembrane 201 are squeezed, a layer of adhesive is applied to the surface of the geomembrane 201 and the rubber waterstop 13.

[0068] In this invention, a geomembrane 201 is bonded to the end face of the trough body 2, which can provide a relatively flat base surface, which is conducive to the sealing connection with the rubber waterstop 13. In addition, due to the thermal expansion and contraction of the trough body 2 throughout the four seasons, the length of the substrate changes. By setting the rubber waterstop 13, the expansion and contraction can be provided, which satisfies both the deformation requirements and the seepage prevention requirements.

[0069] As can be seen from the above description:

[0070] This device uses a steel aqueduct instead of a concrete structure. Firstly, it is easier to manufacture, as it can be prefabricated in a factory, eliminating the need for on-site pouring of the aqueduct body 2 and saving construction time. Secondly, since the steel aqueduct is prefabricated, installation is faster, eliminating the need for full-span scaffolding and minimizing disruption to existing traffic. Furthermore, the steel aqueduct incorporates steel pipes 8, which connect to the aqueduct body 2 to form a combined structure of steel pipes 8 and concrete aqueduct body 2. Compared to the concrete aqueduct body 2, the steel aqueduct is lighter, and the support legs 7 at the bottom can raise the steel pipes 8, increasing the clearance between the bottom support and the road surface, raising the height limit, facilitating the passage of oversized vehicles, and reducing the likelihood of subsequent safety accidents.

[0071] This invention also proposes a reinforcement and maintenance construction method for aqueducts. When a section of the aqueduct spanning the road surface is damaged and needs repair or replacement, the method utilizes the aforementioned steel aqueduct and includes the following steps:

[0072] S1: Remove the corresponding section of the groove body 2 above the road and clean the top of the corresponding frame column 1 to provide a flat base surface; at the same time, clean the end faces of the existing groove bodies 2 on both sides of the section of the groove body 2.

[0073] S2: Bond the cleaned existing trench body 2 end face to the geomembrane 201. The geomembrane 201 is a U-shaped structure adapted to the cross-section of trench body 2. Precautions: The concrete base surface of trench body 2 must be flat and clean. Apply adhesive to both the concrete and the membrane surface for bonding. To improve the bonding strength with the concrete, a 20% toluene solution of geomembrane composite adhesive can be applied to the concrete surface first, allowed to dry, and then the adhesive can be applied for bonding. If the concrete base surface is damp or the concrete has been poured recently, to speed up the construction process, a layer of EF waterproof coating can be applied to the concrete surface first, allowed to solidify, and then the bonding can proceed.

[0074] S3: The steel aqueduct is prefabricated and welded in the factory according to the design dimensions; the steel aqueduct is transported to the construction site and then hoisted, with the support legs 7 placed on top of the frame columns 1, and the extension of the steel pipes 8 extending into the existing trough bodies 2 on both sides.

[0075] S4: Install end plates 12 on the extension of steel pipe 8 and pre-fix the half end plates 121 with fastening bolts 15; tighten screws 10 to push end plates 12 to the end face of the trench body 2, and the end plates 12 are tightly attached to the end face of the trench body 2. At this time, the rubber waterstop 13 is tightly pressed onto the geomembrane 201 to form a seepage-proof sealing layer; then tighten the fastening bolts 15 to fix the top for a second time, so as to achieve a tight connection between end plates 12 and steel pipe 8.

[0076] Note: When pre-fixing the end plate 12, do not fix it too tightly, so as to prevent the end plate 12 from being unable to move along the length of the steel pipe 8.

[0077] S5: A baffle 17 is installed in the existing trough 2, so that one side of the baffle 17 abuts against the end of the steel pipe 8; a casting area is formed between the baffle 17 and the end plate 12.

[0078] S6: Pour impermeable concrete in the pouring area to form a concrete layer 29, which encloses the extension of the steel pipe 8; the formed concrete layer 29 can serve as a second impermeable layer.

[0079] S7: After the concrete has been poured and cured, remove the baffle 17;

[0080] S8: Spray polyurea onto the end face of the formed concrete layer 29 and the inner wall of the tank body 2 (spraying is required at the gaps formed by the contact between the concrete layer and the inside of the tank body) to form a polyurea coating 30, which forms the first anti-seepage layer.

[0081] Polyurea is produced by on-site spraying of semi-prepolymers, amino-terminated polyethers, amine chain extenders, and other raw materials. It is extremely hydrophobic, insensitive to environmental humidity, and can even be sprayed onto water (or ice) to form a film. It can be applied normally under extremely harsh environmental conditions, demonstrating exceptional performance. The advent of polyurea has completely shattered traditional concepts of corrosion prevention and protection, setting a higher standard for the materials protection industry. Polyurea coatings are flexible yet rigid, available in a variety of colors. They are dense, continuous, and seamless, completely isolating the penetration of moisture and oxygen from the air, providing unparalleled corrosion and protection. It also possesses multiple functions such as wear resistance, waterproofing, impact resistance, fatigue resistance, aging resistance, high-temperature resistance, and nuclear radiation resistance.

[0082] In this embodiment, a casting zone is formed between the end plate 12 and the end of the steel pipe 8. Impermeable concrete is poured in the casting zone to form a concrete layer 29, which can serve as a second impermeable layer and further improve the impermeability. A polyurea coating 30 is sprayed on the end face of the concrete layer 29 to form a first impermeable layer. In total, three layers of impermeability are formed, which can greatly improve the impermeability.

[0083] It needs to be further explained that:

[0084] The method for supporting the baffle 17 in S5 is as follows: the baffle 17 is supported by the enclosure support system, wherein, refer to the attached... Figure 16-17 As shown, the enclosure support system includes a first pair of tie rods 18 positioned at the bottom of the trench body 2 and a second pair of tie rods 19 positioned at the top of the trench body 2. The first pair of tie rods 18 and the second pair of tie rods 19 are connected and fixed by a tie rod 20. Both ends of the tie rod 20 are provided with threaded sections for connecting high-strength nuts 21. The top of the second pair of tie rods 19 is threadedly connected to a pressing bolt 23. Specifically, the middle of the second pair of tie rods 19 is raised upward to form a protrusion 22, and the pressing bolt 23 is threadedly connected to the protrusion 22. The bottom end of the pressing bolt 23 is rotatably connected to a channel steel 24, which is pressed down. Bolt 23 and channel steel 24 can rotate relative to each other. The cross-sectional shape of channel steel 24 is an inverted U-shaped structure. The width of the channel steel 24 is greater than the thickness of baffle 17. Channel steel 24 is used to press and clamp onto the top of baffle 17. Baffle 17 can move left and right relative to the groove of channel steel 24. A support frame 25 is also welded to one side of the second pair of tie rods 19. The support frame 25 is a U-shaped structure. A horizontal plate 26 is welded on the support frame 25. Five sets of side pressure bolts 27 are threaded on the horizontal plate 26 and the support frame 25. The side pressure bolts 27 form a five-point support system, which is used to make baffle 17 abut against the end of steel pipe 8.

[0085] To ensure a good seal between the baffle 17 and the opening of the steel pipe 8 during pouring, preventing concrete slurry from flowing into the steel pipe 8, a flexible gasket 28 is installed between the opening of the baffle 17 and the steel pipe 8, which can achieve a good sealing effect.

[0086] The specific usage method of the enclosure scaffolding system is as follows:

[0087] S51: Select a suitable position, install the first pair of tie rods 18 at the bottom of the tank body 2 and the second pair of tie rods 19 at the top of the tank body 2. The first pair of tie rods 18 and the second pair of tie rods 19 are connected and fixed by a tie rod 20, so as to achieve a fixed connection between the first pair of tie rods 18 and the second pair of tie rods 19 and the tank body 2.

[0088] S52: Install baffle 17 in the groove body 2 and adjust baffle 17 to a suitable position;

[0089] S53: Tighten the side pressure bolt 27 to press the baffle 17 against the end of the steel pipe 8;

[0090] S54: Tighten the pressing bolt 23 to press the baffle 17 against the inner wall of the bottom of the groove 2.

[0091] This method uses a steel aqueduct for repair and reinforcement, instead of a concrete structure. The steel aqueduct contains steel pipes 8, which are connected to the trough body 2 to form a combination of steel pipe 8 and concrete trough body 2. Firstly, it is convenient to process and manufacture, as it can be prefabricated in the factory, eliminating the need for on-site pouring of the trough body 2 and saving construction time. Secondly, the hoisting construction speed is fast, eliminating the need for full-span scaffolding and minimizing the impact on existing traffic. Thirdly, the steel aqueduct is lighter than the concrete trough body 2, and the steel aqueduct has support legs 7 at the bottom, which can raise the steel pipes 8, thus increasing the clearance between the bottom support and the road surface, raising the height limit standard, facilitating the smooth passage of oversized vehicles, and reducing the possibility of subsequent safety accidents. Fourthly, the steel aqueduct and the existing trough body 2 are connected by three layers of seepage prevention, which has a good seepage prevention effect, meeting both deformation requirements and seepage prevention requirements.

[0092] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An aqueduct structure, characterized in that, The system includes a steel aqueduct formed by a support frame and steel pipes. The support frame includes two sets of support rods, with several cross braces connecting the two sets of support rods to form a bottom support. Several columns are welded above the support rods, and top rods are welded to the top of the columns, forming side enclosures. The bottom support and the side enclosures together constitute the support frame. An accommodating space is formed between the two sets of side enclosures, and the steel pipes are installed in this accommodating space. The steel pipes are welded and fixed above the bottom support, with both ends of the steel pipes extending out of the accommodating space to form extensions. Support legs are welded to the bottom end of the bottom support for raising the bottom support. An end plate is detachably connected to the extension of the steel pipe. The end plate is formed by two sets of half end plates joined together. A through hole for the steel pipe to pass through is opened in the center of the end plate. Two sets of vertically arranged fixing members are welded to one side of the end plate. Each set of fixing members is provided with two sleeves. The two sleeves are welded to the two sets of half end plates respectively. Fastening bolts are passed between the sleeves to fix the end plate to the steel pipe. A rubber waterstop is provided on the other side of the end plate. The cross-sectional shape of the rubber waterstop is a U-shaped structure that is adapted to the cross-section of the groove.

2. The aqueduct structure according to claim 1, characterized in that, Several reinforcing ribs are welded between the horizontal braces; several diagonal braces are welded between the vertical columns.

3. The aqueduct structure according to claim 1, characterized in that, The support frame is also provided with several sets of top support mechanisms for driving the end plate to move. The top support mechanism includes a fixing nut welded to the support frame. The fixing nut is threadedly connected to a screw rod. When the screw rod is rotated, the screw rod can drive the end plate to move.

4. The aqueduct structure according to claim 3, characterized in that, The half-end plate has a sealing strip on its side.

5. A method for reinforcing and repairing an aqueduct, characterized in that, The aqueduct structure according to claim 4 includes the following steps: S1: Remove the corresponding section of the groove above the road and clean the top of the corresponding frame column; at the same time, clean the end faces of the existing grooves on both sides of the corresponding section of the groove. S2: Bond a geomembrane to the cleaned existing trench end face. The geomembrane is a U-shaped structure that matches the trench cross-section. S3: The steel aqueduct is prefabricated and welded in the factory according to the design dimensions; the steel aqueduct is transported to the construction site and then hoisted, with the legs placed on top of the frame columns and the extensions of the steel pipes extending into the existing trough body on both sides. S4: Install end plates on the extension of the steel pipe and pre-fix the half end plates with fastening bolts; tighten the screws to push the end plates to the end face of the trench body, and the end plates are tightly attached to the end face of the trench body. At this time, the rubber waterstop is tightly pressed onto the geomembrane to form a seepage-proof sealing layer; then tighten the fastening bolts to fix the top for a second time, so as to achieve a tight connection between the end plates and the steel pipe. S5: A baffle is installed in the existing trench, so that one side of the baffle abuts against the end of the steel pipe; a casting zone is formed between the baffle and the end plate. S6: Pour impermeable concrete in the pouring area to form a concrete layer that encloses the extension of the steel pipe. S7: Remove the baffle after the concrete has been poured and cured; S8: Apply a polyurea coating to the end face of the formed concrete layer.

6. The reinforcement and maintenance construction method for an aqueduct according to claim 5, characterized in that, The method for supporting the baffle in S5 is as follows: the baffle is supported by an enclosure support system, wherein the enclosure support system includes a first pair of tie rods positioned at the bottom of the trench and a second pair of tie rods positioned at the top of the trench. The first pair of tie rods and the second pair of tie rods are connected and fixed by tie rods. The top of the second pair of tie rods is threaded with a pressing bolt, and the bottom end of the pressing bolt is rotatably connected to a channel steel, which is used to press and clamp onto the top of the baffle. A support frame is also welded to one side of the second pair of tie rods. The support frame has a U-shaped structure and a horizontal plate is welded on the support frame. Five sets of side pressure bolts are threaded on the horizontal plate and the support frame. The side pressure bolts form a five-point support system for making the baffle rest against the end of the steel pipe. The specific usage method of the enclosure scaffolding system is as follows: S51: Select a suitable position, install the first pair of tie rods at the bottom of the tank body and the second pair of tie rods at the top of the tank body. The first pair of tie rods and the second pair of tie rods are connected and fixed by tie rods to achieve a fixed connection between the first pair of tie rods and the tank body. S52: Install baffles in the tank and adjust the baffles to the appropriate position; S53: Tighten the side pressure bolts to press the baffle against the end of the steel pipe; S54: Tighten the lowering bolt to press the baffle against the inner wall of the bottom of the tank.

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