Intelligent trestle bridge for railway and iron combined transportation dam-penetrating railway

Abstract

An intelligent railway trestle bridge for railway and iron combined transportation through a dam comprises a ground railway section connected with a conventional railway network; the flood gate groove section penetrates through the dam and is provided with a flood gate capable of being opened and closed and a train passing rail; the trestle body is erected on the water surface and comprises a plurality of piers and trestles erected on the piers, the trestles are provided with overwater railway sections, and intelligent electric hydraulic lifting mechanisms are integrated in the piers and used for automatically adjusting the height of the trestles according to the real-time water level condition; wherein railway tracks of the ground railway section, the flood control gate groove section and the overwater railway section are connected in sequence to form a continuous transportation channel. Through seamless connection of tracks of the ground railway section, the flood control gate groove section and the overwater railway section, a complete transportation channel of railway-waterway combined transportation is formed, and the physical barrier of a traditional dam to cross-water-area transportation is broken through.

Description

Technical Field

[0001] The present invention relates to the field of iron-water intermodal transport, and in particular to an intelligent railway trestle for iron-water intermodal transport crossing a dam. Background Art

[0002] With the rapid development of intermodal transport between rail and water, railways are increasingly crossing rivers, seas, lakes and streams, and the need for railways to cross dikes (dams) is becoming increasingly urgent. How to solve the problem of meeting the needs of safe railway operation without affecting the flood control safety of dikes (dams) is an urgent problem to be solved. Summary of the Invention

[0003] In view of the technical defects and technical drawbacks in the prior art, the embodiments of the present invention provide an intelligent railway trestle for iron-water intermodal transport across embankments that overcomes or at least partially solves the above problems. The specific solution is as follows:

[0004] An intelligent railway trestle for combined rail and water transport across a dam, comprising:

[0005] The surface railway section connects to the conventional railway network;

[0006] The flood control sluice section runs through the embankment and is equipped with openable and closable flood control gates and train tracks;

[0007] The main body of the trestle is erected on the water surface and comprises a number of piers and a trestle erected thereon. The trestle is provided with a water railway section. The piers are integrated with an intelligent electric hydraulic lifting mechanism to automatically adjust the height of the trestle according to the real-time water level conditions.

[0008] Among them, the railway tracks of the ground railway section, the flood control sluice section and the water railway section are connected in sequence to form a continuous transportation channel.

[0009] Furthermore, a photovoltaic power supply system and a gantry crane are provided on the trestle;

[0010] The photovoltaic power supply system is used to generate photovoltaic power to provide the electrical energy required by the gantry crane;

[0011] The gantry crane is used to lift the container on the cargo ship to the train docked at the water railway section after the cargo ship docks at one side of the pier, or to lift the container on the train docked at the water railway section to the cargo ship docked at one side of the pier.

[0012] Furthermore, the photovoltaic power supply system includes a photovoltaic corridor, an inverter group and an energy storage device arranged along the trestle;

[0013] The photovoltaic corridor uses a distributed photovoltaic module array, which is arranged along the top or both sides of the trestle, forming a DC power supply circuit through series and parallel connection. The output end of the power generation unit is equipped with a lightning protection junction box to achieve current collection and overvoltage protection of multiple photovoltaic arrays;

[0014] The inverter group adopts a modular design and is used to convert photovoltaic direct current into alternating current;

[0015] The energy storage device uses a lithium-ion battery pack and is used to store the electric energy converted by the inverter group.

[0016] Furthermore, the intelligent electro-hydraulic lifting mechanism includes:

[0017] A water level sensing unit that uses a radar water level gauge (accuracy ±1mm) and a float sensor for dual-redundancy detection of the real-time water level. It is installed on the upstream and downstream surfaces of the pier column of the trestle and three-level monitoring points are set, including the normal water level reference point H0, the warning water level threshold H1 = H0 + x1, and the emergency water level threshold H2 = H0 + x2. Here, x1 and x2 are preset water level increments, x2 is greater than x1, where x1 is default 1.5m and x2 is default 2.2m;

[0018] A control decision-making unit that integrates a fuzzy PID algorithm through a PLC controller, processes sensor data in real time, and generates a hydraulic cylinder stroke command;

[0019] It has three built-in adjustment modes:

[0020] Normal mode, water level ≤ H1, water level fluctuation < 0.3m: Fine-tune the hydraulic cylinder to maintain a floating accuracy of ±5cm

[0021] Flood season mode, H1 < water level < H2: Start the fast response mechanism (lifting speed 0.5m / min)

[0022] Emergency mode, water level ≥ H2: Trigger an audible and visual alarm and lock the gantry crane operation, and raise the trestle to a preset safe height;

[0023] A hydraulic execution unit that adopts a synchronous flow dividing motor design based on an electric hydraulic cylinder group, making the multi-point lifting synchronous error ≤ 3mm, and equipped with an emergency accumulator that can maintain the basic hydraulic pressure for 30 minutes when power is cut off.

[0024] Furthermore, the intelligent electro-hydraulic lifting mechanism also includes;

[0025] An early warning linkage unit: Configure a hierarchical alarm strategy, where:

[0026] Primary warning, water level reaches H1: Pop-up prompt in the central control room and generate a dispatching adjustment suggestion;

[0027] Secondary alarm, water level reaches H1 + 0.5m: Link to the pre-closing procedure of the flood control gate;

[0028] Tertiary emergency response, water level reaches H2: Forcefully terminate the operation and start the flood control emergency plan.

[0029] Furthermore, the intelligent trestle for combined rail and water transportation across the dam also includes an intelligent control box, which includes:

[0030] Central control unit: A dual-redundant PLC control station is set up. The main control station is directly connected to the flood control command center and integrates a train positioning system;

[0031] Interlocking execution unit: It is a gate opening and closing mechanism equipped with a dual power source of hydraulic drive + electric standby

[0032] The interlocking execution unit sets up three-level status detection:

[0033] Normal passage, water level < H1: Keep the gate open;

[0034] Early warning state, H1 ≤ water level < H2: Trigger a 15-minute countdown closing program

[0035] Emergency lockdown, water level ≥ H2: Immediately cut off the track power supply and lower the gate;

[0036] Train control system, used to control the entry and exit of trains and conduct in-gate verification, including checking the matching degree of train ID, load data and flood control level;

[0037] Controlling the entry and exit of trains includes dynamic speed limit control, including:

[0038] Normal speed passage, that is, normal passage when the water level < H1;

[0039] Early warning state: The passing speed ≤ 20 km / h

[0040] During the gate operation: Passage is prohibited.

[0041] Furthermore, the sealing structure of the flood control gate includes three layers of protection components, from outside to inside in sequence:

[0042] Rubber water stop belt, embedded in the gate slot concrete structure;

[0043] Stainless steel pressure seal strip, applying lateral pressure through a hydraulic mechanism;

[0044] Water-expandable rubber strip, arranged around the gate body.

[0045] Furthermore, the above-water part of the railway is provided with adjustable track joints, including:

[0046] Corrugated steel plate compensation system, compensating for the track expansion and contraction through corrugated steel plates;

[0047] Elastic fastener system, meeting the longitudinal displacement of ±50 mm through elastic fasteners;

[0048] Dynamic monitoring system, deploying fiber Bragg grating sensors (sampling frequency 1 kHz), for monitoring:

[0049] Gauge variation (accuracy ±0.2mm);

[0050] Longitudinal displacement (range ±60mm);

[0051] Bolt axial force attenuation rate.

[0052] Furthermore, the railway intelligent trestle for intermodal transport through dams also includes:

[0053] The meteorological linkage system integrates a dual trigger mechanism of wind speed monitoring (threshold 25m / s) and water level sensing (accuracy ±2cm), which automatically initiates a 15-minute emergency preparation procedure after receiving warning information from the meteorological department.

[0054] Mechanical locking device, including a hydraulic latch locker (pin diameter 80mm, 42CrMo material), which is driven by the hydraulic system to insert the latch into the preset lock hole of the trestle to achieve a rigid connection;

[0055] The condition monitoring system deploys a strain gauge sensor network (sampling rate 100Hz) to monitor in real time:

[0056] Axial stress of locking pin;

[0057] Trestle vibration acceleration (range ±5g);

[0058] Structural displacement (laser ranging accuracy 0.1mm).

[0059] Furthermore, the locking process of the mechanical locking device includes:

[0060] Wind speed ≥ 20m / s, enter the warning stage: automatically tighten the damper, reduce the freedom of movement of the trestle, and start the locking mechanism preheating program (applicable to low temperature environments of -30℃)

[0061] When the wind speed is ≥25m / s, the system enters the emergency locking stage, controls the hydraulic system to complete the locking of all latches within 30 seconds, cuts off non-essential power loads, and switches to UPS power supply mode.

[0062] The present invention has the following beneficial effects:

[0063] 1. By seamlessly connecting the ground railway section, the flood control sluice section, and the water railway section, a complete rail-waterway transport corridor is formed, breaking through the physical barriers of traditional embankments to cross-water transport;

[0064] 2. The intelligent trestle is equipped with an electric hydraulic lifting mechanism that can achieve dynamic leveling with an accuracy of ±5cm. Combined with a three-level water level response mechanism (H0 / H1 / H2), it ensures that the trestle can be safely raised within 30 minutes during flood season, maintaining a navigation rate of over 95% year-round.

[0065] 3. The three-layer sealing structure of the flood gate (rubber + stainless steel + water-swelling rubber strip) achieves watertight protection with a compressive strength ≥1MPa, and can withstand the impact of a flood that occurs once every 50 years. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 A schematic diagram of the layout of a railway intelligent trestle for intermodal transport through an embankment (dam) provided by an embodiment of the present invention;

[0067] Figure 2 A schematic cross-sectional view of an intelligent railway trestle for intermodal transport through an embankment (dam) provided by an embodiment of the present invention;

[0068] Among them: 1. Ground railway section, 2. Flood control gate section, 3. Pier, 4. Cargo ship, 5. Container, 6. Photovoltaic corridor, 7. Gate, 8. Train, 9. Bridge pier, 10. Intelligent electric hydraulic lifting mechanism, 11. Gantry crane, 12. System control room, 13. Intelligent control box. DETAILED DESCRIPTION

[0069] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0070] See also Figure 1 and 2 As shown, the intelligent railway trestle for iron-water intermodal transport through dams provided by the embodiment of the present invention includes:

[0071] Ground railway section 1, connected to the conventional railway network;

[0072] The flood gate trough section 2 runs through the embankment and is provided with a closable flood gate 7 and a train 8 passage track;

[0073] The main body of the trestle is erected on the water surface and includes a plurality of piers 9 and a trestle 3 erected thereon. The trestle 3 is provided with a water railway section. The piers 9 are integrated with an intelligent electric hydraulic lifting mechanism 10 for automatically adjusting the height of the trestle 3 according to the real-time water level.

[0074] For example, referring to the reference water level, when the water level drops, the intelligent electric hydraulic mechanism will contract the bridge piers accordingly based on the amount of water level drop, thereby lowering the height of the railway trestle; when the water level rises, the intelligent electric hydraulic mechanism will lift the bridge piers accordingly based on the amount of water level rise, thereby raising the height of the railway trestle.

[0075] Among them, the railway tracks of the ground railway section 1, the flood control sluice section 2 and the water railway section are connected in sequence to form a continuous transportation channel.

[0076] Optionally, the railway trestle system further includes a dam pavement transition section for connecting the ground railway section 1 and the flood control gate trough section 2.

[0077] The seamless connection between the ground railway section 1, the flood control sluice section 2, and the water railway section overcomes the traditional embankment barrier to railway crossings, enabling direct railway access to the core port operating area and reducing transshipment links by 30%-50%. Combined with a three-level water level response mechanism (H0 / H1 / H2) and hydraulic synchronous lifting technology, the track elevation deviation is guaranteed to be ≤3mm under once-in-a-century flood conditions, ensuring a 95% navigation guarantee rate.

[0078] In some embodiments, the trestle 3 is provided with a photovoltaic power supply system and a gantry crane 11;

[0079] The photovoltaic power supply system is used to generate photovoltaic power to provide the electrical energy required by the gantry crane 11;

[0080] The gantry crane 11 is used to lift the container 5 on the cargo ship 4 to the train 8 docked at the water railway section after the cargo ship 4 docks at one side of the pier 3, or to lift the container 5 on the train 8 docked at the water railway section to the cargo ship 4 docked at one side of the pier 3.

[0081] Wherein, the photovoltaic power supply system comprises a photovoltaic corridor 6 arranged along the trestle, an inverter group and an energy storage device;

[0082] The photovoltaic corridor 6 uses a distributed photovoltaic module array, which is arranged along the top or both sides of the trestle 3, forming a DC power supply circuit through series and parallel connection. The output end of the power generation unit is equipped with a lightning protection junction box to achieve current collection and overvoltage protection of multiple photovoltaic arrays;

[0083] Photovoltaic corridor 6 installation forms include:

[0084] Fixed bracket (suitable for trestle flat paving area);

[0085] Adjustable angle bracket (adjusts the photovoltaic tilt angle according to water level changes to optimize power generation efficiency);

[0086] A lightning protection combiner box is configured at the output end of the power generation unit to achieve current collection and overvoltage protection for multiple photovoltaic arrays.

[0087] The inverter group adopts a modular design and is used to convert photovoltaic direct current into alternating current;

[0088] Among them, the inverter group supports grid-connected / off-grid dual-mode operation. In the grid-connected mode, it preferentially supplies power to the gantry crane 11, and the surplus power is fed back to the power grid. It integrates the maximum power point tracking (MPPT) algorithm to adapt to the dynamic light conditions of the trestle. The output end is connected to the intelligent power distribution cabinet to realize real-time monitoring and adjustment of voltage and frequency.

[0089] The energy storage device uses a lithium-ion battery pack to store the electric energy converted by the inverter group.

[0090] In some embodiments, the intelligent electro-hydraulic lifting mechanism 10 includes:

[0091] A water level sensing unit that uses a radar water level gauge (accuracy ±1mm) and a float-type sensor for dual-redundancy detection of the real-time water level. It is installed on the upstream and downstream surfaces of the trestle pier column and sets three-level monitoring points, including the normal water level reference point H0, the warning water level threshold H1 = H0 + x1, and the emergency water level threshold H2 = H0 + x2. Here, x1 and x2 are preset water level increments, where x1 defaults to 1.5m and x2 defaults to 2.2m;

[0092] A control decision-making unit that integrates a fuzzy PID algorithm through a PLC controller to process sensor data in real time and generate a hydraulic cylinder stroke command;

[0093] It has three built-in adjustment modes:

[0094] Normal mode, water level ≤ H1, water level fluctuation < 0.3m: Fine-tune the hydraulic cylinder to maintain a floating accuracy of ±5cm

[0095] Flood season mode, H1 < water level < H2: Start the fast response mechanism (lifting speed 0.5m / min)

[0096] Emergency mode, water level ≥ H2: Trigger an audible and visual alarm and lock the operation of the gantry crane 11, and raise the trestle to a preset safe height;

[0097] A hydraulic execution unit that is designed with a synchronous flow divider motor based on an electric hydraulic cylinder group, making the synchronous error of multi-point lifting ≤ 3mm, and equipped with an emergency accumulator that can maintain the basic hydraulic pressure for 30 minutes when power is off.

[0098] In the above embodiments, the water level monitoring error is ≤ 2cm through the dual-redundancy sensor + fuzzy PID algorithm, the control accuracy of the hydraulic cylinder stroke reaches ±1mm, and the emergency accumulator supports the locking of the trestle for 30 minutes after power off, avoiding accidents caused by track offset due to flood impact.

[0099] In some embodiments, the intelligent electro-hydraulic lifting mechanism 10 further includes;

[0100] An early warning linkage unit: Configure a hierarchical alarm strategy, where:

[0101] Primary warning, water level reaches H1: A pop-up window appears in the central control room, and dispatching adjustment suggestions are generated;

[0102] Secondary alarm, water level reaches H1 + 0.5m: Link to the pre-closure procedure of the flood control gate;

[0103] Tertiary emergency response, water level reaches H2: Forcefully terminate operations and activate the flood control emergency plan.

[0104] In the above embodiments, the water level threshold links to the pre-closure procedure of the gate, compressing the flood control operation response time to the 15-minute level, generating a train formation adjustment suggestion plan, and reducing the train detention rate caused by abnormal water levels.

[0105] In some embodiments, the intelligent trestle for combined rail and water transportation across the dam also includes an intelligent control box 13, which is installed in the system control room and connected to the train control system. The intelligent control box 13 includes:

[0106] Central control unit: Set up a dual-redundant PLC control station, with the main control station directly connected to the flood control command center and integrated with the train positioning system;

[0107] Interlock execution unit: It is the opening and closing mechanism of gate 7, equipped with a dual power source of hydraulic drive + electric standby

[0108] The interlock execution unit sets three-level status detection:[[ID=二十二]]

[0109] Normal passage, water level < H1: Keep gate 7 open;

[0110] Warning state, H1 ≤ water level < H2: Trigger a 15-minute countdown closing procedure

[0111] Emergency lockdown, water level ≥ H2: Immediately cut off the track power supply and lower the gate;

[0112] Train control system, used to control the entry and exit of train 8, and perform in-gate verification, including checking the matching degree of train ID, load data and flood control level;

[0113] Controlling the entry and exit of train 8 includes dynamic speed limit control, including:

[0114] Normal speed passage, that is, normal passage when the water level < H1;

[0115] Warning state: The passing speed ≤ 20 km / h[[ID=四十三]]

[0116] During the operation of gate 7: Passage is prohibited.[[ID=四十六]]

[0117] In the above embodiments, the dual PLC control stations achieve automatic fault switching, the track power supply cut-off response time ≤ 3 seconds, and the dual verification of train ID and load data to intercept illegal vehicles.

[0118] In some embodiments, the sealing structure of the flood gate 7 includes three layers of protective components, from the outside to the inside:

[0119] Rubber waterstop, embedded in the gate channel concrete structure;

[0120] Stainless steel pressurized sealing strip, applying lateral pressure through hydraulic mechanism;

[0121] The water-expandable rubber strip is arranged around the gate 7 body.

[0122] In the above embodiment, the triple sealing structure greatly improves the anti-seepage ability of the gate 7, and the stainless steel pressurized sealing strip dynamically compensates for the structural deformation of 0.5-3mm, ensuring the long-term sealing reliability.

[0123] In some embodiments, the above-water portion of the railway is provided with an adjustable track joint, comprising:

[0124] Corrugated steel plate compensation system, which compensates for track expansion and contraction through corrugated steel plates;

[0125] Elastic fastener system, which meets ±50mm longitudinal displacement through elastic fasteners;

[0126] Dynamic monitoring system, deploying fiber Bragg grating sensors (sampling frequency 1kHz), monitoring:

[0127] Gauge variation (accuracy ±0.2mm);

[0128] Longitudinal displacement (range ±60mm);

[0129] Bolt axial force attenuation rate.

[0130] In the above embodiment, the corrugated steel plate and elastic fastener combination design compensates for ±50mm longitudinal displacement and 2° horizontal rotation angle, and the fiber Bragg grating sensor achieves a 0.1mm level monitoring accuracy of track gauge change, and the bolt preload attenuation warning is provided 48 hours in advance.

[0131] In some embodiments, the intelligent railway trestle for intermodal transport across dams further comprises:

[0132] The meteorological linkage system integrates a dual trigger mechanism of wind speed monitoring (threshold 25m / s) and water level sensing (accuracy ±2cm), which automatically initiates a 15-minute emergency preparation procedure after receiving warning information from the meteorological department.

[0133] Mechanical locking device, including a hydraulic latch locker (pin diameter 80mm, 42CrMo material), which is driven by the hydraulic system to insert the latch into the preset lock hole of the trestle to achieve a rigid connection;

[0134] The condition monitoring system deploys a strain gauge sensor network (sampling rate 100Hz) to monitor in real time:

[0135] Axial stress of locking pin;

[0136] Trestle vibration acceleration (range ±5g);

[0137] Structural displacement (laser ranging accuracy 0.1mm).

[0138] Furthermore, the locking process of the mechanical locking device includes:

[0139] Wind speed ≥ 20m / s, enter the warning stage: automatically tighten the damper, reduce the freedom of movement of the trestle, and start the locking mechanism preheating program (applicable to low temperature environments of -30℃)

[0140] When the wind speed is ≥25m / s, the system enters the emergency locking stage, controls the hydraulic system to complete the locking of all latches within 30 seconds, cuts off non-essential power loads, and switches to UPS power supply mode.

[0141] In the above embodiment, the hydraulic latch is locked by triggering wind speed sensing to resist the displacement of the trestle under typhoon conditions, and the strain gauge network monitors the vibration acceleration exceeding the standard in real time, with a positioning accuracy of 0.5 meters.

[0142] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An intelligent railway trestle for combined iron and water transport across embankments, characterized in that: Comprising: A ground railway section, connected to the conventional railway network; A flood control sluice section, running through the dam, equipped with openable and closable flood control gates and train passage tracks; A trestle main body, erected on the water surface, including several bridge piers and a trestle erected thereon. An underwater railway section is provided on the trestle, and an intelligent electric hydraulic lifting mechanism is integrated in the bridge pier to automatically adjust the height of the trestle according to the real-time water level; Among them, the railway tracks of the ground railway section, the flood control sluice section and the underwater railway section are connected in sequence to form a continuous transportation channel.

2. The intelligent railway trestle for combined iron and water transport across embankments according to claim 1 is characterized in that: A photovoltaic power supply system and a gantry crane are provided on the trestle; The photovoltaic power supply system is used for photovoltaic power generation to provide the electric energy required by the gantry crane; The gantry crane is used to lift the containers on the cargo ship to the train parked on the underwater railway section or lift the containers on the train parked on the underwater railway section to the cargo ship parked on one side of the trestle after the cargo ship docks on one side of the trestle.

3. The intelligent railway trestle for combined iron and water transport across embankments according to claim 2 is characterized in that: The photovoltaic power supply system includes a photovoltaic corridor arranged along the trestle, an inverter group and an energy storage device; The photovoltaic corridor adopts a distributed photovoltaic module array, arranged along the top or both sides of the trestle, forming a DC power circuit through series and parallel connection. A lightning protection busbar box is configured at the output end of the power generation unit to realize the current collection and overvoltage protection of multiple photovoltaic arrays; The inverter group adopts a modular design and is used to convert photovoltaic DC power into AC power; The energy storage device adopts a lithium-ion battery pack and is used to store the electric energy converted by the inverter group.

4. The intelligent railway trestle for combined iron and water transport across embankments according to claim 1 is characterized in that: The intelligent electric hydraulic lifting mechanism includes: A water level sensing unit, using a radar water level gauge and a float-type sensor for dual-redundancy detection of the real-time water level, installed on the upstream and downstream surfaces of the trestle bridge pier, and three-level monitoring points are set, including the normal water level reference point H0, the warning water level threshold H1 = H0 + x1 and the emergency water level threshold H2 = H0 + x2, where x1 and x2 are preset water level increments, and x2 is greater than x1; A control decision unit, integrating a fuzzy PID algorithm through a PLC controller, processing sensor data in real time and generating a hydraulic cylinder stroke command; Three built-in adjustment modes: Normal mode, water level ≤ H1, water level fluctuation < 0.3m: Fine-tune the hydraulic cylinder to maintain a floating accuracy of ±5cm; Flood season mode, H1 < water level < H2: Start the fast response mechanism, lifting speed 0.5m / min; Emergency mode, water level ≥ H2: Trigger an audible and visual alarm and lock the operation of the gantry crane, and the trestle is lifted to a preset safe height; A hydraulic execution unit, designed with a synchronous flow dividing motor based on an electric hydraulic cylinder group, making the multi-point lifting synchronous error ≤ 3mm, and equipped with an emergency energy accumulator to maintain the basic hydraulic pressure for 30 minutes when power is cut off.

5. The intelligent railway trestle for combined iron and water transport across embankments according to claim 4 is characterized in that: The intelligent electric hydraulic lifting mechanism further includes; An early warning linkage unit: Configuring a hierarchical alarm strategy, where: Primary warning, water level reaches H1: Pop-up prompt in the central control room, generating a dispatching adjustment suggestion; Secondary alarm, water level reaches H1 + 0.5m: Link the flood control gate pre-closing procedure; Tertiary emergency response, water level reaches H2: Forcefully terminate the operation and start the flood control emergency plan.

6. The intelligent railway trestle for combined iron and water transport across embankments according to claim 4 is characterized in that: The intelligent trestle for railway-water combined transport through the dam railway also includes an intelligent control box, and the intelligent control box includes: Central control unit: A dual-redundant PLC control station is set up. The main control station is directly connected to the flood control command center and integrates a train positioning system; Interlocking execution unit: It is the gate opening and closing mechanism, equipped with a dual power source of hydraulic drive + electric standby The interlocking execution unit sets up three-level status detection: Normal passage, water level < H1: Keep the gate open; Warning state, H1 ≤ water level < H2: Trigger a 15-minute countdown closing program Emergency lockdown, water level ≥ H2: Immediately cut off the track power supply and lower the gate; Train control system, used to control the entry and exit of trains and conduct entry gate verification, including checking the matching degree of train ID, load data and flood control level; Controlling the entry and exit of trains includes dynamic speed limit control, including: Normal speed passage, that is, normal passage when the water level < H1; Warning state: The passage speed ≤ 20 km / h During the gate operation: Passage is prohibited.

7. The intelligent railway trestle for combined iron and water transport across embankments according to claim 1 is characterized in that: The sealing structure of the flood control gate includes three layers of protective components, from the outside to the inside in sequence: Rubber water stop belt, embedded in the gate slot concrete structure; Stainless steel pressure seal strip, applying lateral pressure through a hydraulic mechanism; Water swelling rubber strip, set around the gate body.

8. The intelligent railway trestle for combined iron and water transport across embankments according to claim 1 is characterized in that: The above-water part of the railway is provided with adjustable track joints, including: Corrugated steel plate compensation system, compensating for the track expansion and contraction through corrugated steel plates; Elastic fastener system, meeting the longitudinal displacement of ±50 mm through elastic fasteners; Dynamic monitoring system, deploying fiber Bragg grating sensors to monitor: Track gauge change; Longitudinal displacement; Axial force attenuation rate of bolts.

9. The intelligent railway trestle for combined iron and water transport across embankments according to claim 1 is characterized in that: The intelligent trestle for combined rail and water transportation across the dam railway also includes: Meteorological linkage system, integrating a dual-trigger mechanism of wind speed monitoring and water level sensing, automatically starting a 15-minute emergency preparation program after receiving early warning information from the meteorological department Mechanical locking device, including a hydraulic plug-type lock, achieving rigid connection by driving the plug into the preset lock hole of the trestle through a hydraulic system; Status monitoring system, deploying a strain gauge sensor network to monitor in real time: Axial stress of the locking pin; Vibration acceleration of the trestle; Structural displacement.

10. The intelligent railway trestle for combined iron and water transport across embankments according to claim 9 is characterized in that: The locking process of the mechanical locking device includes: Wind speed ≥ 20 m / s, entering the warning stage: Automatically tighten the damper, reduce the freedom of movement of the trestle, and start the preheating program of the locking mechanism; Wind speed ≥ 25 m / s, entering the emergency locking stage, controlling the hydraulic system to complete all plug lockings within 30 seconds, cutting off non-essential power loads, and switching to the UPS power supply mode.

Images