Bridge structure applied to nuclear power cold source interception and filtration

Abstract

Compared with the prior art, the bridge structure applied to nuclear power cold source interception and filtration has the advantages that net bags are arranged between pile foundations, a plurality of pile foundation cross beams below cross beams are transversely arranged, the supporting stability of the cross beams is guaranteed, a plurality of cross beams are longitudinally arranged along longitudinal beams, the pile foundations are connected through the cross beams and the longitudinal beams, and the supporting stability of the cross beams is guaranteed; the transverse beams are arranged in a thickened mode, the extending beams are arranged at the two ends of the thickened transverse beams in an equal-thickness mode, the stability of net bag opening and closing equipment on the extending beams is improved, then the stability of the net bag opening and closing equipment on net bag collecting, releasing and filtering can be improved, and the overall strength of the bridge structure is improved. And moreover, a wide bridge is formed, mechanical equipment such as net bag opening and closing equipment can be conveniently cleaned and maintained, cleaning and transporting vehicles can pass through the net bag, the net bag can be conveniently lifted to be cleaned, and the efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of nuclear power cold source interception and filtration technology, and in particular to a bridge structure applied to nuclear power cold source interception and filtration. Background Technology

[0002] The existing civil engineering structures for intercepting and filtering cold sources in nuclear power plants are mostly simple pile-foundation type net bags. The structure is as follows: pile foundations are laid in the water, and crossbeams are set on top of the pile foundations for placing mechanical equipment. The net bags are hung between the pile foundations, and the net bags covering the entire cross-section of the water passage are used to intercept small marine organisms and marine debris to ensure the safety of the cold source water.

[0003] This simple pile-foundation net structure platform achieves its filtration function by simply hanging netting on the pile foundation and installing winches and other equipment on the cap beam to open and close the net. However, this structure has poor overall integrity, poor resistance to earthquakes, wind, and water erosion, and low efficiency in cleaning and maintaining the net, as well as the mechanical equipment for opening and closing the net. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a bridge structure for intercepting and filtering cold sources in nuclear power plants.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] According to the present invention, a bridge structure for intercepting and filtering cold sources in nuclear power plants includes a net, longitudinal beams, multiple crossbeams, and multiple pile foundations. The multiple crossbeams are arranged longitudinally along the longitudinal direction of the longitudinal beams, and the longitudinal beams are fixed to the multiple crossbeams. Each crossbeam corresponds to at least two pile foundations, and the crossbeams are fixed to the top of the pile foundations, with the corresponding pile foundations arranged transversely along the crossbeams. At least a portion of the crossbeams are vertically thickened, and the two thickened end faces of the thickened crossbeams extend into extension beams along the transverse direction of the crossbeams, so that the extension beams are integrally formed with the corresponding crossbeams. The net is installed between at least a portion of the pile foundations along the longitudinal direction of the longitudinal beams, and the extension beams are used to install net opening and closing devices, which are used to open and close the net for filtering.

[0007] Compared with existing technologies, this invention places the net between the pile foundations. Multiple horizontal beams are arranged under the pile foundations to ensure the stability of the beams. Multiple horizontal beams are also arranged longitudinally along the longitudinal beams. The pile foundations are connected through the horizontal and longitudinal beams, forming a longitudinally connected integral structure to ensure the stability of the pile foundations. The horizontal beams are thickened, and extension beams of equal thickness are set at both ends of the thickened beams to increase the stability of the net opening and closing device on the extension beams. This increases the stability of the net opening and closing device in terms of net opening and closing and filtration, and improves the overall strength of the bridge structure, enhancing its resistance to earthquakes, wind, and water erosion. Furthermore, it forms a wide bridge, facilitating the cleaning and maintenance of mechanical equipment such as the net opening and closing device, allowing passage for cleaning vehicles, and facilitating the lifting and lowering of the net for cleaning, thus improving efficiency. Attached Figure Description

[0008] Figure 1 This is a bridge site plan view of the bridge structure applied to the interception and filtration of nuclear power cold sources according to the present invention;

[0009] Figure 2 This is a partial bridge layout diagram of the bridge structure applied to the interception and filtration of nuclear power cold sources according to the present invention;

[0010] Figure 3 A schematic diagram to highlight the bridge type corresponding to the winch;

[0011] Figure 4 A schematic diagram to highlight the bridge type corresponding to the elevator;

[0012] Figure 5 A schematic diagram to highlight the bridge type corresponding to the power distribution room;

[0013] Figure 6 To highlight the front view of the pier structure corresponding to the winch;

[0014] Figure 7 A top view to highlight the partial pier structure of the winch;

[0015] Figure 8 for Figure 7 A schematic diagram of the CC section view along the center line;

[0016] Figure 9 for Figure 7 A schematic diagram of the DD section along the middle;

[0017] Figure 10 To highlight the front view of the pier structure corresponding to the elevator;

[0018] Figure 11 A top view to highlight the structure of the pier corresponding to the elevator;

[0019] Figure 12 for Figure 11 A schematic diagram of the EE section view;

[0020] Figure 13 for Figure 11 A schematic diagram of the section view along the FF line;

[0021] Figure 14 To highlight the front view of the bridge pier structure corresponding to the power distribution room;

[0022] Figure 15 A top view to highlight the structure of the bridge pier corresponding to the power distribution room;

[0023] Figure 16 for Figure 15 A schematic diagram of the cross-section along the GG line;

[0024] Figure 17 A front view to highlight the reinforcement details of the irregularly shaped cap beam;

[0025] Figure 18 A top view to highlight the reinforcement details of the irregularly shaped cap beam;

[0026] Figure 19 for Figure 18 A schematic diagram of the cross-section along the HH axis;

[0027] Figure 20 A schematic diagram to highlight the tilt angle of the local bearing plate;

[0028] Figure 21 A schematic diagram to highlight the structure of the cable trough;

[0029] Figure 22 A diagram to highlight the dosing tube.

[0030] Reference numerals: 1. Net; 2. Longitudinal beam; 201. Approach bridge section; 202. Main bridge section; 203. Abutment section; 3. Crossbeam; 301. Widened crossbeam; 4. Pile foundation; 401. Steel sleeve; 5. Extension beam; 6. Cantilever plate; 7. Local bearing rib; 8. Roller embedded part; 9. Local bearing plate; 10. Inclined side; 11. Arc-shaped plate embedded part; 12. Column base anchor beam; 13. Shaped bearing stone; 14. Reinforced pile foundation; 15. Plate-shaped cantilever platform; 16. Guardrail; 17. Power distribution platform; 18. First base; 19. Second base; 20. Cable trough; 21. Cover plate; 22. Step; 23. Dosing pipe; 24. Placement groove; 25. Bridge bearing; 26. Positioning block. Detailed Implementation

[0031] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0032] Through in-depth research and improvement exploration of the simplified mesh pile foundation, the applicant discovered the following: 1. This simplified mesh pile structure platform typically has few civil engineering interfaces connecting to automated process equipment. 2. There is no longitudinal superstructure connection between piles; each mesh anchor point relies on an independent pile platform, resulting in poor overall structural integrity in terms of wind resistance, earthquake resistance, and water erosion resistance. 3. There is no bridge deck connection between piles; the original structure only has simple cableways for personnel to walk to different work points for maintenance. Large maintenance equipment (such as maintenance vehicles) cannot reach the work points at the cap beam via the bridge deck structure, leading to low efficiency in non-mechanized cleaning and maintenance operations. Furthermore, the lack of a bridge deck connection prevents the laying of low-voltage cables for automated and intelligent equipment, necessitating the use of mechanized equipment. 4. Cleaning the mesh is difficult, relying solely on manual labor, resulting in low cleaning efficiency. When the debris nets need to be cleaned, workers can only be carried out on the sea by small boats to clean the nets. Mechanical equipment is used to bring the nets to the surface, and the maintenance personnel on the boats clean and disassemble the nets while the boats are floating. The operation is unstable and the working experience is poor, especially in strong winds at sea.

[0033] Based on this, the technical solutions provided by the various embodiments of this application will be described below with reference to the accompanying drawings.

[0034] This specification presents an embodiment of a bridge structure for intercepting cold sources in nuclear power plants, such as... Figure 1 , Figure 2 as well as Figure 3 As shown, the system includes a net bag 1, longitudinal beams 2, multiple crossbeams 3, and multiple pile foundations 4. The multiple crossbeams 3 are arranged longitudinally along the longitudinal beams 2, with the longitudinal beams 2 fixed to the crossbeams 3. Each crossbeam 3 corresponds to at least two pile foundations 4, and the crossbeams 3 are fixed to the top of the pile foundations 4, with the corresponding pile foundations 4 arranged transversely along the crossbeams 3. At least some of the crossbeams 3 are vertically thickened, and the two thickened end faces of the thickened crossbeams 3 extend into extension beams 5 along the transverse direction of the crossbeams 3, so that the extension beams 5 are integrally formed with the corresponding crossbeams 3. The net bag 1 is installed between at least some of the pile foundations 4 along the longitudinal direction of the longitudinal beams 2. The extension beams 5 are used to install net bag opening and closing devices, which are used for loading and unloading the net bag 1 for filtration. The extension beams 5 mainly house the winch of the net bag opening and closing device. The net bag 1 is mainly located between the pile foundations 4 corresponding to the extension beams 5, and can also be installed between the pile foundations 4 corresponding to the approach bridge section 201 of the longitudinal beams 2. This application arranges the net bag 1 according to the tide level and the height of the pile foundations 4 according to the underwater structure.

[0035] In one embodiment, such as Figure 3 , Figure 4 As shown, the net bag opening and closing device includes a winch, and cantilever plates 6 extend along the longitudinal direction of the longitudinal beam 2 on both sides of the extension beam 5, and the cantilever plates 6 and the extension beam 5 constitute a winch platform for installing the winch.

[0036] In one embodiment, such as Figure 17 , Figure 18 as well as Figure 19 As shown, the reinforcing bars within the cantilever slab 6 are arranged in multiple layers, such as two layers, depending on the thickness of the cantilever slab 6. The reinforcing bars in each layer of the cantilever slab 6 extend longitudinally along the longitudinal direction of the longitudinal beam 2 and laterally along the transverse direction of the transverse beam 3. The reinforcing bars extending longitudinally along the longitudinal direction of the longitudinal beam 2 are arranged laterally along the transverse direction of the transverse beam 3, and the reinforcing bars extending laterally along the transverse direction of the transverse beam 3 are arranged longitudinally along the longitudinal direction of the longitudinal beam 2, forming a crisscross arrangement. The reinforcing bars extending longitudinally along the longitudinal direction of the longitudinal beam 2 pass through the extension beam 5. The cantilever slab 6 and the extension beam 5 are integrally formed, improving the structural strength of both. The extension direction of the cantilever slab 6 is longitudinally along the longitudinal direction of the longitudinal beam 2, and the extension direction of the extension beam 5 is transversely along the transverse direction of the transverse beam 3. The extension direction of the cantilever slab 6 is perpendicular to the two sides of the extension beam 5.

[0037] In one embodiment, such as Figure 6 , Figure 7 , Figure 8 as well as Figure 9 As shown, a local pressure-bearing rib 7 is formed under the cantilever plate 6. The local pressure-bearing rib 7 corresponds to the installation corner point of the winch. The local pressure-bearing rib 7 is perpendicular to the side of the extension beam 5. The winch embedded part 8 at the installation corner point of the winch is located in the local pressure-bearing rib 7.

[0038] A local bearing rib 7 extends a local bearing plate 9 at its bottom along the direction perpendicular to the cantilever plate 6, so that the local bearing plate 9 corresponds to the installation corner point of the winch. The local bearing plate 9 extends perpendicularly to the side of the extension beam 5. The local bearing rib 7 is symmetrically arranged along the plane where the local bearing plate 9 is located, and the width of the cross section of the local bearing rib 7 parallel to the side of the extension beam 5 gradually decreases from the cantilever plate 6 to the local bearing plate 9, forming two symmetrical inclined side surfaces 10 of the local bearing rib 7. The width of the local bearing plate 9 gradually decreases from the side of the extension beam 5 toward the side away from the side of the extension beam 5.

[0039] In one embodiment, such as Figure 6 and Figure 20 As shown, the tilt angle of the local bearing plate 9 is 15 to 25 degrees.

[0040] In one embodiment, such as Figure 17 , Figure 18 as well as Figure 19 As shown, the reinforcing bars in the local bearing rib 7 extend longitudinally along the longitudinal beam 2 and along the inclined direction of the inclined side 10 at the two inclined sides 10 of the local bearing rib 7; the reinforcing bars of the local bearing rib 7 extending longitudinally along the longitudinal beam 2 are arranged along the inclined direction of the inclined side 10, and the reinforcing bars of the local bearing rib 7 extending along the inclined direction of the inclined side 10 are arranged longitudinally along the longitudinal beam 2, forming a cross arrangement.

[0041] The reinforcing bars in the partial bearing plate 9 extend longitudinally along the longitudinal beam 2 and perpendicularly along the cantilever plate 6 at both surfaces of the partial bearing plate 9. The reinforcing bars extending longitudinally along the longitudinal beam 2 at the surface of the partial bearing plate 9 are arranged perpendicularly along the cantilever plate 6, and the reinforcing bars extending perpendicularly along the cantilever plate 6 at the surface of the partial bearing plate 9 are arranged longitudinally along the longitudinal beam 2, forming a cross arrangement.

[0042] In one embodiment, such as Figure 17 , Figure 18 as well as Figure 19 As shown, the reinforcing bars extending along the direction perpendicular to the cantilever plate 6 at the two surfaces of the local bearing plate 9 pass through the local bearing ribs 7 and extend into the cantilever plate 6.

[0043] One end of the reinforcing bar extending along the inclined direction of the inclined side 10 is connected to the cantilever plate 6 and extends into an embedded section that is parallel to and embedded in the cantilever plate 6. The other end of the reinforcing bar extending along the inclined direction of the inclined side 10 is connected to the reinforcing bar located on the surface of the local bearing plate 9 that extends in a direction perpendicular to the cantilever plate 6.

[0044] The reinforcing bars in the local bearing plate 9 also extend into the local bearing rib 7 between the two surfaces of the local bearing plate 9 along the direction perpendicular to the cantilever plate 6.

[0045] In one embodiment, such as Figure 6 As shown, a local reinforcing mesh is formed in the local bearing rib 7 at the position corresponding to the embedded part 8 of the winding machine. The reinforcing bars of the local reinforcing mesh are arranged in multiple layers, such as four or five layers, along the direction perpendicular to the cantilever slab 6. The reinforcing bars of each layer of the local reinforcing mesh extend longitudinally along the longitudinal beam 2 and transversely along the transverse beam 3, forming a crisscross arrangement. The reinforcing bars on both sides of the local reinforcing mesh along the transverse direction of the transverse beam 3 extend perpendicular to the cantilever slab 6 and are arranged longitudinally along the longitudinal beam 2.

[0046] The winding machine embedded part 8 includes a winding machine embedded plate and winding machine embedded rods vertically set on the winding machine embedded plate. The winding machine embedded rods are arranged longitudinally and transversely along the longitudinal direction of the longitudinal beam 2 and the transverse direction of the transverse beam 3. The winding machine embedded rods are inserted into the local reinforcing mesh. The winding machine embedded part 8 also includes a winding machine profile stone.

[0047] A winch platform is installed at both ends of the irregularly shaped cap beam. The platform structure adopts a cantilever plate 6 with supporting stiffening beams. The cantilever plate 6 has a cantilever length of 2930mm and a width of 3700mm. Local bearing steel mesh is installed at the corresponding winch installation corners of the cantilever plate 6 to resist the adverse effects on the equipment footings under the action of the winch during cable winding and unwinding and tornado loads, ensuring sufficient platform strength. The platform is anchored to the winch equipment using pre-embedded flange bolts. The installed winch is used for the automated and mechanized winding and unwinding of the net bag 1 cable.

[0048] When the reinforcing bars of the working platform interfere with the reinforcing bars of the cap beam, the position of the platform reinforcing bars should be adjusted appropriately. Locally compressed reinforcing mesh is installed directly below each winch embedded part. The embedded plate is made of Q235B steel, and the welding rods are E43XX type. The embedded plate is hot-dip galvanized for corrosion protection.

[0049] In one embodiment, such as Figure 6 , Figure 7 , Figure 8 as well as Figure 9 As shown, the winch embedded part 8 corresponding to the installation corner point of the winch is also set on the extension beam 5, and multiple winch embedded parts 8 are connected by ribs, and the ribs extend longitudinally along the longitudinal beam 2, laterally along the transverse beam 3, and along the direction of the vertical cantilever plate 6.

[0050] In one embodiment, such as Figure 10 , Figure 11 , Figure 12 as well as Figure 13 As shown, the extended beam 5 has a type-shaped bearing stone 13, and the local bearing rib 7 also corresponds to the type-shaped bearing stone 13; the local bearing rib 7 corresponding to the winding machine embedded part 8 is set as multiple and arranged transversely along the crossbeam 3, the local bearing rib 7 corresponding to the type-shaped bearing stone 13 is located on the side of the local bearing rib 7 corresponding to the winding machine embedded part 8 away from the longitudinal beam 2, and a reinforced pile foundation 14 is formed below the extended beam 5 corresponding to the type-shaped bearing stone 13.

[0051] In one embodiment, such as Figure 10 , Figure 11 , Figure 12 as well as Figure 13 As shown, the net bag opening and closing device also includes a lift. A plate-shaped cantilever platform 15 for installing the lift is fixed between the bottom of the extension beam 5 and the reinforcing pile foundation 14, and the plate-shaped cantilever platform 15 is set to protrude from the end face of the extension beam 5 away from the longitudinal beam 2.

[0052] In one embodiment, the reinforcing bars within the plate-shaped cantilever platform 15 are arranged in multiple layers, such as two layers, depending on the thickness of the plate-shaped cantilever platform 15. The reinforcing bars in each layer of the plate-shaped cantilever platform 15 extend longitudinally along the longitudinal beam 2 and laterally along the transverse beam 3. The reinforcing bars extending longitudinally along the longitudinal beam 2 are arranged laterally along the transverse beam 3, and the reinforcing bars extending laterally along the transverse beam 3 are arranged longitudinally along the longitudinal beam 2, forming a crisscrossing arrangement. The plate-shaped cantilever platform 15, the extension beam 5, and the reinforcing pile foundation 14 are integrally formed.

[0053] In one embodiment, such as Figure 1 As shown, the type-shaped support stone 13 is located on the same side of the longitudinal direction of the longitudinal beam 2, and adjacent type-shaped support stones 13 are set every three crossbeams 3. The elevator is located on the same side of the longitudinal direction of the longitudinal beam 2, and adjacent elevators are set every three crossbeams 3.

[0054] A 2900mm x 2000mm lifting platform is installed on top of the side pile below the end of the irregular cap beam. The platform is constructed of a 300mm thick reinforced concrete cantilever slab. This structure is used to install the lifting equipment.

[0055] In one embodiment, the local bearing ribs 7 corresponding to the shaped bearing stone 13 are connected by reinforcing ribs extending longitudinally along the longitudinal beam 2, and reinforcing ribs extending laterally along the transverse beam 3 are also present between the reinforcing ribs of the upper winding machine embedded part 8 located on the transverse beam 3. The reinforcing mesh of the shaped bearing stone 13 is set inside the foundation pad stone of the monitoring equipment.

[0056] The bearing stone 13 includes a bearing stone body and a bearing embedded part disposed in the bearing stone body. The bearing embedded part includes a bearing embedded plate and a plurality of bearing bolts fixed on the bearing embedded plate. The bearing bolts are fixed in the bearing stone body.

[0057] In one embodiment, such as Figure 3 As shown, an inclined surface is formed at the bottom of the extension beam 5, which only has a winch, and the width of the inclined surface gradually decreases on the side of the extension beam 5 in the direction away from the crossbeam 3.

[0058] In one embodiment, such as Figure 3 As shown, guardrails 16 are also provided on the plate-shaped cantilever platform 15 and the cantilever plate 6.

[0059] In one embodiment, such as Figure 5 , Figure 14 , Figure 15 as well as Figure 16 As shown, some of the crossbeams 3 are formed as adjacent widened crossbeams 301. The widened crossbeams 301 are widened in the transverse direction of the crossbeams 3. A power distribution platform 17 for installing the power distribution room is formed on the adjacent widened crossbeams 301 along the longitudinal direction of the longitudinal beam 2. The power distribution room is connected to the net bag opening and closing device through a cable.

[0060] This bridge Figure 1 The upper structure of the 20th and 21st axes from left to right is widened to 17.5m, forming a large platform. The platform is used to install the power distribution room, which houses the information-based, intelligent, and mechanized control electronic modules and power hardware facilities for the deployment, retrieval, and monitoring of the entire bridge's debris-blocking net.

[0061] In one embodiment, such as Figure 21 and Figure 22As shown, cable mounting structures for installing cables are formed on both sides of the longitudinal beam 2. The cable mounting structure includes a first base 18 and a second base 19 fixed on the longitudinal beam 2. Both the first base 18 and the second base 19 extend longitudinally along the longitudinal beam 2. The first base 18 is located on the outer side of the longitudinal beam 2 near the longitudinal beam 2. A cable trough 20 for placing cables is formed between the first base 18 and the second base 19 and the longitudinal beam 2. A cover plate 21 is provided between the first base 18 and the second base 19. The first base 18 and the second base 19 extend towards each other with overlapping platforms that overlap the cover plate 21. The overlapping platforms extend vertically to the longitudinal beam 2. The cover plate 21 covers the cable trough 20.

[0062] In one embodiment, the cover plate 21 is made of lightweight grating cover plate 21.

[0063] In one embodiment, the upper surface of the second base 19 is flush with the cover plate 21; a step 22 extending from the longitudinal beam 2 to the cover plate 21 is formed on the side of the second base 19 away from the first base 18, forming a step. An arc-shaped plate embedded part 11 is provided on the first base 18.

[0064] Cable troughs 20 are installed on both sides of the bridge deck and contain cables for connecting each winch to the power distribution room. The cable troughs 20 are covered with lightweight grating covers 21 for easy daily maintenance and repair. Steps are provided on the inner and outer foundations of the cable troughs 20 for easy access by staff.

[0065] The embedded parts on the side wall of cable trough 20 are arranged along the entire length of both side walls of cable trough 20. The diameter d of the anchor bar is 8mm, the bar is bent, and the length of the bar hook is 6d.

[0066] In one embodiment, such as Figure 3 , Figure 21 and Figure 22 As shown, the dosing pipe 23 passes through the first base 18 and the second base 19, and the end of the dosing pipe 23 on the side of the second base 19 away from the first base 18 serves as the inlet of the dosing pipe 23. The dosing pipe 23 extends vertically into the water along the pile foundation 4 and is installed on the outside of the crossbeam 3 and the pile foundation 4.

[0067] The dosing pipe 23 is installed at the pier locations, with one pipe symmetrically installed on both sides of each pier. The horizontal pipe passes through the cable trough 20 and then connects to the vertical pipe, which extends to the lowest water level through components such as the cap beam and piles. This structure is used to deliver drugs to kill marine organisms in the debris-blocking net area, and also serves as a drainage pipe for the bridge deck.

[0068] In one embodiment, the thickness of the thickened crossbeam 3 ranges from 2500mm to 3000mm and the thickness is from 1000mm to 1500mm. A placement groove 24 for placing the longitudinal beam 2 is formed on the thickened crossbeam 3, and the placement groove 24 is arranged longitudinally through the longitudinal beam 2 so that the thickened crossbeam 3 is flush with the surface of the longitudinal beam 2.

[0069] The irregularly shaped cap beam with a concave structure has a groove that provides space for the installation of precast hollow slabs while reducing the weight of the cap beam. After the hollow slabs are installed, the bridge deck and the working platform are at the same level, which facilitates smooth passage for workers between the driving lane and the working platform.

[0070] In one embodiment, such as Figure 1 As shown, the longitudinal beam 2 includes the main bridge section 202 and the approach bridge section 201 and abutment section 203 connecting the two ends of the main bridge section 202; the crossbeam 3 corresponding to the main bridge section 202 includes the crossbeam 3 with the extension beam 5 and the widened crossbeam 301; the longitudinal beam 2 of the main bridge section 202 is a waterproof concrete hollow slab. The approach bridge section 201 is arc-shaped and can serve as a breakwater connection section, and the abutment section 203 is a pile foundation type 4 lightweight abutment.

[0071] The superstructure of this debris-blocking bridge adopts prestressed (post-tensioned) concrete precast hollow slab simply supported beams, while the section connecting to the breakwater uses cast-in-place reinforced concrete continuous beams. The substructure features integrated pile-column piers with irregular cap beams, and lightweight pile-column abutments. The overall span of the bridge is (3x11.73) + 20x16 + 4x13 = 407.19m. Hoops for rope threading are installed on the outer side of the pile foundations to secure the debris-blocking net and filter marine organisms, ensuring the safety of the pumping station's water intake and improving the reliability of the water intake and the safety of the cold source. The bridge's load rating is Highway-II. 80-type expansion joints are used at the abutments and piers, and the bridge deck is continuous. The pile foundations for the abutments and piers are rock-socketed piles, with the bearing stratum being moderately weathered rock. The depth of the rock-socketed pile bottom into the bearing stratum is controlled at ≥1D, where D is the pile diameter. This bridge is located on a straight line with a 0% longitudinal slope, and no longitudinal slope is provided; it uses transverse drainage. The dimensions in the drawing are in mm.

[0072] In one embodiment, such as Figure 2 As shown, pile foundation 4 is inserted into the water bottom; pile foundation 4 includes a steel sleeve 401 and a reinforced concrete structure set in the steel sleeve 401; a column bottom anchor beam 12 is formed between some pile foundations 4. During construction, the pier pile foundation 4 is poured in two stages. The first stage is poured to a depth of 1m above the normal water level, the pile head is removed, and formwork is erected to continue the second stage of pouring the above part of pile foundation 4. When the site is limited, geological exploration drilling cannot be carried out normally. Pier piles are often determined with reference to the geological longitudinal profile. Before construction, it is necessary to conduct supplementary drilling for the pier. Construction of pile foundation 4 is prohibited before supplementary drilling. When the pile head is removed during the second stage of pier column pouring, the reinforcing steel should be protected to ensure the continuity of the reinforcing steel.

[0073] In one embodiment, such as Figure 2 As shown, a column bottom anchor beam 12 is formed between the bottom of the sides of the pile foundation 4. The column bottom anchor beam 12 provides anchor points for the cables used to fix the net bag 1 below the water surface. The column bottom anchor beam 12 is placed in the trench after the replacement layer is excavated, and the side walls are backfilled with crushed stone. Based on the water flow balance test under the bridge, the self-weight of the anchor beam is determined, thereby obtaining a reasonably stressed anchor beam cross-sectional size to prevent the underwater anchor points from being washed away by the water flow and to ensure effective interception.

[0074] The embedded plate of the pre-embedded part is a steel plate. A grouting hole and a vent hole should be opened in the middle of the steel plate. The grouting hole is 40-50mm in diameter. The vent hole is 30mm in diameter to facilitate the compaction of the concrete pouring.

[0075] In one embodiment, a rope clamp for installing the net bag 1 is provided on the outer side of the pile foundation 4, and the rope clamps are arranged vertically along the pile foundation 4. The rope clamp includes a clamp section and a fixing ring fixed on the clamp section. The fixing ring is used to pass the installation rope of the net bag 1 through, and the clamp section is fixed around the outside of the iron sleeve of the pile foundation 4.

[0076] In one embodiment, positioning blocks 26 for positioning the longitudinal beam 2 are formed on both sides of the crossbeam 3, and the positioning blocks 26 are inclined towards each other on the crossbeam 3.

[0077] In one embodiment, the crossbeam 3 is provided with multiple bridge supports 25 for supporting the longitudinal beam 2. The bridge supports 25 may be spherical steel GD fixed supports, spherical steel DX unidirectional movable supports, or spherical steel SX bidirectional movable supports. The bridge supports 25 are arranged linearly or rectangularly.

[0078] In one embodiment, the bridge bearing 25 includes a bearing pad, a bearing body on the bearing pad, and a bearing steel plate on the bearing body, with a longitudinal beam 2 connected to the bearing steel plate. The total support height of the bearing (exposed steel plate + bearing height + bearing pad height) is 250mm.

[0079] The height of the bearing pads on both sides of the pier centerline should be adjusted according to the longitudinal slope of the bridge deck. At the junction pier between approach bridge section 201 and the standard section, there is a 65mm height difference between the cast-in-place approach bridge beam and the standard precast beam. This height difference is adjusted using bearing pads; the height of the bearing pads on the smaller pile number side is 85mm, and the height of the bearing pads on the larger pile number side is 150mm. The standard section is the main bridge section 202.

[0080] In one embodiment, the cantilever plate 6, the partial bearing rib 7, the partial bearing plate 9, and the crossbeam 3 are made of high-performance concrete.

[0081] In one embodiment, a 4.0m driveway is formed on the longitudinal beam 2.

[0082] The wastewater interception net bridge of this application connects the pile foundations 4 longitudinally into a whole structure through the bridge's structural form, improving the structure's resistance to earthquakes, wind, and water erosion. By setting up an irregularly shaped cap beam and supporting the stiffening cantilever plate 6, the limited working area at the top of the original cap beam is overcome, providing ample space for the installation of hoisting equipment, lifting equipment, monitoring equipment, and personnel operations. A 4.0m driveway is reserved in the superstructure for the passage of waste collection vehicles, improving operation and maintenance efficiency. In accordance with the process concept of "mechanization, automation, and informatization," cable troughs 20 are set on the bridge deck to reserve weak point cables for various equipment. After the new wastewater interception net bridge is completed, it can fully realize automatic lifting, automatic suction, and automatic cleaning of the net bag 1, requiring only a small number of personnel for daily operation and maintenance and inspection. The technical feature of this invention lies in the concave cantilever plate 6 and the irregularly shaped cap beam, which has an extremely complex spatial structure.

[0083] The key problem solved by the new debris-blocking net bridge structure is providing a comprehensive civil engineering interface for the interception and filtration process, allowing the process and civil structure to be fully integrated, giving full play to its mechanized and intelligent functions, and greatly improving the interception and cleaning efficiency. The technical features of the new debris-blocking net bridge are summarized as follows: a mechanized deployment and retrieval device is installed on the cantilever slab 6 of the pier cap beam; rope clamps are installed on the pier piles; and precast anchor beams are installed between the piles at the bottom of the piles. The cable trough 20 on the bridge deck provides power support for the mechanized deployment and retrieval device, enabling the equipment to carry multiple task modules (such as deployment and retrieval of the flat net / net bag 1, mechanical monitoring, lighting, maintenance and hoisting, etc.). The superstructure of the bridge allows passage for dredging vehicles, and workers can deploy and retrieve the net using mechanical tools on the bridge deck, while simultaneously using a net-retrieval boat to retrieve the net bag 1.

[0084] Compared to the traditional pile-foundation type 4 net bag 1, this application offers the following advantages: 1) The debris-blocking net bridge structure provides more civil engineering interfaces for the debris-blocking process, resulting in a more rational structural stress distribution. By setting up a bridge deck structure, most of the work can be moved to the bridge deck, such as equipment installation, use and maintenance, and the deployment and cleaning of the net bag 1. The bridge deck structure ensures accessibility for waste collection vehicles to the equipment, improving operation and maintenance efficiency. 2) The irregularly shaped cap beam and the stiffened cantilever plate 6 structure have a significantly different stress distribution pattern from traditional cap beams, requiring consideration of more local loads, especially in resisting wind loads and local mechanical loads. This structure demonstrates excellent stress performance. The winch working platform structure designed in this application, namely the cantilever plate 6 structure with stiffened support beams, can provide a reference template for similar small offshore operating platforms. 3) The new debris-blocking net bridge, combined with various mechanical equipment and electronic modules, transforms the entire bridge from a simple civil engineering structure into an intelligent, information-based, and mechanized comprehensive waterborne operating platform. 4) The substructure strength standard of the new type of debris-blocking net bridge exceeds that of ordinary highway and municipal bridges. This bridge can maintain its elasticity even under rare earthquake conditions with a nuclear power plant seismic standard of SL-2 (once in 10,000 years), saving on post-earthquake repair work, time, and costs. Throughout its entire life cycle, it is relatively economical, and its strong seismic resistance provides sufficient protection for the safety of nuclear power plant water intake.

[0085] This application develops a nuclear power cold source interception and filtration bridge, the main technical points of which are: (1) an irregularly shaped cap beam with a supporting beam and stiffened cantilever plate 6, the cap beam supports the superstructure and provides an installation platform for the interception equipment (such as winches, elevators, etc.); (2) the interception net bag 1 is hung on the bridge pile foundation 4 and the column bottom anchor beam 12, and the automated net opening and closing operation is completed by the bridge deck machinery; (3) the upper part of the bridge is equipped with a cable trough 20 and a power distribution room to realize the intelligent, information-based and automated functions of opening and closing the interception net; (4) the strength of the substructure of the bridge reaches the nuclear power SL-2 seismic resistance standard, that is, the bridge structure remains in an elastic state under a rare earthquake that occurs once every 10,000 years, and its seismic resistance is higher than that of similar highway and municipal bridges.

[0086] This application presents a novel debris-blocking bridge structure, combining a circulating water monitoring and pre-filtration platform with a suction platform. The debris-blocking bridge structure is also suitable for the installation of suction platform structures in power plant water intake channels, enabling online suction and cleaning. This debris-blocking bridge provides a reference template for civil engineering structures used in nuclear power plants nationwide for debris interception and filtration.

[0087] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A bridge structure for intercepting and filtering cold sources in nuclear power plants, characterized in that, The system includes a net, longitudinal beams, multiple crossbeams, and multiple piles. The multiple crossbeams are arranged longitudinally along the longitudinal beams, and the longitudinal beams are fixed to the multiple crossbeams. Each crossbeam corresponds to at least two piles, and the crossbeams are fixed to the top of the piles, with the corresponding piles arranged transversely along the crossbeams. At least a portion of the crossbeams are vertically thickened, and the two thickened end faces of the thickened crossbeams extend into extension beams along the transverse direction of the crossbeams, so that the extension beams are integrally formed with the corresponding crossbeams. The net is installed between at least a portion of the piles along the longitudinal direction of the longitudinal beams. A net opening and closing device is installed on the extension beams, and the net opening and closing device is used to open and close the net for filtration.

2. The bridge structure for intercepting and filtering cold sources in nuclear power plants according to claim 1, characterized in that, The net bag opening and closing device includes a winch. Cantilever plates extend along the longitudinal direction of the longitudinal beam on both sides of the extension beam, and the cantilever plates and the extension beam constitute a winch platform for installing the winch. The reinforcing bars in the cantilever plates are arranged in multiple layers according to the thickness of the cantilever plates. The reinforcing bars of each layer of the cantilever plates extend along the longitudinal direction of the longitudinal beam and the transverse direction of the transverse beam. The reinforcing bars of the cantilever plates extending along the longitudinal direction of the longitudinal beam are arranged transversely along the transverse beam, and the reinforcing bars of the cantilever plates extending transversely along the transverse beam are arranged longitudinally along the longitudinal direction of the longitudinal beam, forming a crisscross arrangement. The reinforcing bars of the cantilever plates extending along the longitudinal direction of the longitudinal beam pass through the extension beam. The cantilever plates and the extension beam are integrally formed.

3. The bridge structure for intercepting and filtering cold sources in nuclear power plants according to claim 2, characterized in that, A local pressure-bearing rib is formed under the cantilever plate, corresponding to the installation corner point of the winch. The local pressure-bearing rib is perpendicular to the side of the extension beam. The winch embedded part at the installation corner point of the winch is located on the local pressure-bearing rib. A local pressure-bearing plate extends from the bottom of the local pressure-bearing rib in a direction perpendicular to the cantilever plate. The local pressure-bearing plate is perpendicular to the side of the extension beam. The local pressure-bearing rib is symmetrically arranged along the plane of the local pressure-bearing plate. The cross-section of the local pressure-bearing rib parallel to the side of the extension beam gradually decreases in width from the cantilever plate to the local pressure-bearing plate, forming two symmetrical inclined sides of the local pressure-bearing rib. The width of the local pressure-bearing plate gradually decreases from the side of the extension beam away from the side of the extension beam.

4. The bridge structure for intercepting and filtering cold sources in nuclear power plants according to claim 3, characterized in that, The reinforcing bars within the local bearing rib extend longitudinally along the longitudinal direction of the longitudinal beam and along the inclined direction of the inclined side at the two inclined sides of the local bearing rib; the reinforcing bars of the local bearing rib extending longitudinally along the longitudinal direction of the longitudinal beam are arranged along the inclined direction of the inclined side, and the reinforcing bars of the local bearing rib extending along the inclined direction of the inclined side are arranged longitudinally along the longitudinal direction of the longitudinal beam, forming a cross arrangement. The reinforcing bars in the partial bearing plate extend longitudinally along the longitudinal beam and perpendicularly to the cantilever plate at both surfaces of the partial bearing plate. The reinforcing bars extending longitudinally along the longitudinal beam at the surface of the partial bearing plate are arranged perpendicularly to the cantilever plate, and the reinforcing bars extending perpendicularly to the cantilever plate at the surface of the partial bearing plate are arranged longitudinally along the longitudinal beam, forming a cross arrangement.

5. The bridge structure for intercepting and filtering cold sources in nuclear power plants according to claim 4, characterized in that, Reinforcing bars extending perpendicularly to the cantilever plate at both surfaces of the partial bearing plate pass through the partial bearing ribs and extend into the cantilever plate. One end of the reinforcing bar extending along the inclined direction of the inclined side is connected to the cantilever plate and extends into an embedded section parallel to the cantilever plate. The other end of the reinforcing bar extending along the inclined direction of the inclined side is connected to the reinforcing bar located on the surface of the local bearing plate that extends in a direction perpendicular to the cantilever plate. The reinforcing bars within the partial bearing plate also extend into the partial bearing ribs between the two surfaces of the partial bearing plate in a direction perpendicular to the cantilever plate.

6. The bridge structure for intercepting and filtering cold sources in nuclear power plants according to claim 3, characterized in that, A partial reinforcing mesh is formed in the partial bearing rib corresponding to the position of the winding machine embedded part. The reinforcing bars of the partial reinforcing mesh are arranged in multiple layers along the direction perpendicular to the cantilever plate. The reinforcing bars of each layer of the partial reinforcing mesh extend longitudinally along the longitudinal beam and transversely along the transverse beam, forming a crisscross arrangement. The reinforcing bars of the partial reinforcing mesh on both sides of the transverse beam extend in the direction perpendicular to the cantilever plate and are arranged longitudinally along the longitudinal beam. The winding machine embedded part includes an embedded plate and embedded rods vertically set on the embedded plate. The embedded rods are arranged in a longitudinal and transverse pattern along the longitudinal direction of the longitudinal beam and the transverse direction of the transverse beam. The embedded rods are inserted into the local reinforcing mesh.

7. The bridge structure for intercepting and filtering cold sources in nuclear power plants according to claim 3, characterized in that, The extension beam has a shaped stone, and the local bearing rib also corresponds to the shaped stone; the local bearing rib corresponding to the winding machine embedded part is provided in multiple ways and arranged laterally along the crossbeam, the local bearing rib corresponding to the shaped stone is located on the side of the local bearing rib of the corresponding winding machine embedded part away from the longitudinal beam, and a reinforced pile foundation is formed below the extension beam corresponding to the shaped stone.

8. The bridge structure for intercepting and filtering cold sources in nuclear power plants according to claim 7, characterized in that, The net bag opening and closing device also includes a lift, and a plate-shaped cantilever platform for installing the lift is fixed between the bottom of the extension beam and the reinforcing pile foundation, and the plate-shaped cantilever platform is set to protrude from the end face of the extension beam away from the longitudinal beam.

9. The bridge structure for intercepting and filtering cold sources in nuclear power plants according to any one of claims 1 to 8, characterized in that, Some of the crossbeams are formed as adjacent widened crossbeams, which are widened in the transverse direction. A power distribution platform for installing a power distribution room is formed on the adjacent widened crossbeams along the longitudinal direction of the longitudinal beam. The power distribution room is connected to the net bag opening and closing device via a cable.

10. The bridge structure for intercepting and filtering cold sources in nuclear power plants according to any one of claims 1 to 8, characterized in that, The thickness of the thickened crossbeam ranges from 2500mm to 3000mm and the thickness increase ranges from 1000mm to 1500mm. The thickened crossbeam has a placement groove for placing the longitudinal beam, and the placement groove is arranged to run through the longitudinal direction of the longitudinal beam so that the thickened crossbeam is flush with the surface of the longitudinal beam.

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