Construction method of structure above entrance and exit section of subway track without shutdown

Abstract

The invention relates to the technical field of construction of structures above subway track access sections, in particular to a construction method of structures above subway track access sections without interruption, which comprises the following steps: producing prefabricated upright posts, prefabricating concrete upright posts in a factory, implanting positioning chips, and laying a foundation for accurate hoisting after accelerated maintenance; and deploying the isolation cabins, wherein the steel isolation cabins which are intelligently opened and closed dynamically cover the rail-mounted area. Zero-shutdown construction of a track structure is achieved through the dynamic isolation and clearance operation technology, normal timetable passing and high-risk construction of a train coexist through an intelligent isolation cabin second-level opening and closing mechanism, and single-span structure track traveling interference is reduced to the minimum through precise operation of prefabricated parts and robots; the vibration conduction blocking system ensures that passengers have no vibration sense when the train passes at the designed speed per hour, social traffic interference is thoroughly eliminated, the rail settlement risk is completely eradicated, and key technical support is provided for urban subway network operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the construction field of the structure above the metro track access section, in particular to a construction method of the structure above the metro track access section without stopping operation. BACKGROUND

[0002] The structure above the metro track access section refers to the aerial building body across the connection area of the vehicle section and the main line track, which is usually used for carrying the upper cover property development or transportation hub facilities, and the bottom needs to guarantee the all-weather train operation. Such structure directly suspends above the operating track, and the traditional construction must interrupt the metro operation to avoid safety risks.

[0003] Generally, the traditional method relies on the night shutdown window to build full-frame support and cast-in-place concrete, and each operation needs to interrupt the operation for more than four hours, and the single-span structure construction leads to more than twenty-eight hours of cumulative shutdown.

[0004] This way has three fatal defects: first, long-term shutdown causes passenger congestion and line scheduling paralysis, second, support foundation disturbance of the track causes millimeter-level settlement and needs to be repeatedly adjusted, and third, high-altitude falling risk forces the train to slow down to fifteen kilometers per hour, which is low in overall efficiency and has bad social impact.

[0005] In summary, a construction method of the structure above the metro track access section without stopping operation is needed to solve the above problems. SUMMARY

[0006] The purpose of the present application is to provide a construction method of the structure above the metro track access section without stopping operation to solve the problems raised in the background.

[0007] To achieve the above purpose, the present application provides the following technical scheme:

[0008] The present application provides a construction method of the structure above the metro track access section without stopping operation, which includes the following steps:

[0009] S1. Precast column production, precast concrete columns are produced in the factory and implanted with positioning chips, and after accelerated curing, the foundation is laid for accurate hoisting;

[0010] S2. Isolation cabin deployment, the steel isolation cabin is intelligently opened and closed to dynamically cover the track area;

[0011] S3. Column hoisting, the buffer hoisting system is used to accurately position the column through the train gap, and the support structure is quickly formed by fixing;

[0012] S4. Template installation, the electromagnetic adsorption corrugated board realizes quick assembly, and the sealing and vibration reduction measures are combined to guarantee the pouring conditions;

[0013] S5. Beam casting: Quick-setting concrete beams are cast in sections for high efficiency, and the main structure is formed during train passage.

[0014] S6. Platform construction: Robots automatically pour concrete for the cantilevered platform, and simultaneous membrane curing ensures structural quality;

[0015] S7. Integral synthesis: After the interface between new and old concrete is treated, the whole concrete is poured, and the platform is seamlessly synthesized by low-disturbance vibration.

[0016] S8. Site withdrawal and delivery: the isolation compartments are removed in sections and the tracks are reset, with real-time monitoring to ensure safe and uninterrupted operation.

[0017] Preferably, the implementation steps of step S1 are as follows:

[0018] S1.1. Prefabricate C50 concrete columns in the factory, with a single section length of no more than 6m to match the track spacing. Embed RFID positioning chips with an accuracy of ±2mm and implant vibration sensors at the column base.

[0019] S1.2. The column is accelerated to 80% of the design strength by using 60℃ steam for 6 hours, ensuring that the column can meet the requirements for rapid installation and support millimeter-level positioning requirements as soon as it leaves the factory.

[0020] Preferably, the implementation steps of step S2 are as follows:

[0021] S2.1. Deploy a foldable steel isolation chamber above the track area, with an impact-resistant layer at the top ≥10kN / m. 2 The side walls are equipped with sound-absorbing material with an NRC value of ≥0.8;

[0022] S2.2. The cabin movement is linked by the track sensing system: when the train is 200m away from the construction point, the cabin will automatically close and lock within 5 seconds; after the rear of the train has passed 50m, the cabin will unfold within 8 seconds to restore the working space, providing a physical isolation barrier for high-risk procedures.

[0023] Preferably, the implementation steps of step S3 are as follows:

[0024] S3.1. Utilize a time window of ≥4 minutes between trains to carry out column hoisting using a hydraulic buffer hoist with a vibration reduction rate of ≥70%;

[0025] S3.2. During the hoisting process, a laser positioning system with an accuracy of ±1mm is matched with the RFID chip pre-embedded in the column to monitor the vibration value in real time. When the vibration value is ≥0.5mm / s, the machine will automatically stop.

[0026] S3.3. The column base is fixed with 5-minute initial setting quick-hardening grout to establish a reference surface for slab installation.

[0027] Preferably, the implementation steps of step S4 are as follows:

[0028] S4.1. Adsorb 1.2mm thick galvanized corrugated sheet onto the electromagnetic base pre-embedded in the column bracket, with an adsorption force ≥5kN / m. 2 Single-span formwork installation speed ≥ 20m 2 / h;

[0029] S4.2. The template joint is injected with quick-curing sealant with a curing time of ≤10min. A 30mm silicone damping pad is added to the bottom to block vibration transmission. The installation is completed within the interval between two trains. The flatness of the installation is ≤3mm / 2m.

[0030] Preferably, the implementation steps of step S5 are as follows:

[0031] S5.1. Use initial setting time T 15 = 15min ultra-early strength concrete segmented casting of crossbeams, each segment length ≤2m;

[0032] S5.2. The material is precisely placed by a robotic arm with an error of ±10mm, and the vibration is monitored throughout the pouring process to be ≤1.0mm / s. The pouring unit is closed 20 minutes before the train arrives, which ensures that the structure is formed during the opening and closing gap of the isolation chamber in step S2.

[0033] Preferably, the implementation steps of step S6 are as follows:

[0034] S6.1. After the crossbeam strength reaches 20MPa, a robot equipped with a laser leveling system is used to pour the cantilever platform.

[0035] S6.2. The robotic arm's material placement speed is ≥5m / s. 3 / h, automatically covered with PE curing film before final setting;

[0036] S6.3. The robot avoids artificial vibration sources and matches the early strength time node of the beam in step S5.

[0037] Preferably, the implementation steps of step S7 are as follows:

[0038] S7.1. Roughen the already poured surface with sandblasting to a roughness of ≥0.8mm, lay Φ12@150 steel mesh, and then pour the entire surface with 1.5kg / m 3 Micro-expansion concrete with polypropylene fibers has an expansion rate of 0.01–0.03%.

[0039] S7.2. Use a 40dB low-noise ultrasonic vibrator to ensure that the vibration transmitted to the track is ≤0.3mm / s. The micro-expansion formula compensates for the shrinkage difference in the staged pouring of steps S5 and S6.

[0040] Preferably, the implementation steps of step S8 are as follows:

[0041] S8.1. Remove the isolation compartments in sections and simultaneously remeasure the track gauge using a track fine-tuning instrument;

[0042] S8.2. Pre-embedded FBG fiber optic sensors monitor settlement at a frequency of once per 10 minutes, controlling the long-term rate to ≤0.1 mm / month;

[0043] S8.3. Trains were limited to a speed of 15 km / h during the demolition period, and the final delivery was completed without any interruption.

[0044] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention achieves zero-downtime construction of track structures through dynamic isolation and gap operation technology; the intelligent isolation cabin's second-level opening and closing mechanism allows for the coexistence of normal train timetable operation and high-risk construction; the precise operation of prefabricated components and robots minimizes track interference in single-span structures; and the vibration transmission blocking system ensures that passengers do not feel vibration when the train passes at the design speed, completely eliminating social traffic interference, preventing track subsidence risks, and providing key technical support for the networked operation of urban subways. Attached Figure Description

[0045] Figure 1 A flowchart illustrating the construction method of the structure above the non-stop subway track access section according to the present invention is shown. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Example 1, please refer to Figure 1 This invention proposes a construction method for the structure above the access section of a subway track without interrupting operation, comprising the following steps:

[0048] S1. Precast column production: The factory precasts concrete columns and implants positioning chips, which, after accelerated curing, lay the foundation for precise hoisting.

[0049] S2. Deployment of isolation modules: Intelligent opening and closing steel isolation modules dynamically cover the track area;

[0050] S3. Column hoisting: Utilizing the gaps between trains, the column is precisely positioned using a buffer hoisting system and quickly fixed to form a supporting structure;

[0051] S4. Template installation: Electromagnetic adsorption of corrugated sheets enables rapid assembly, and combined with sealing and vibration reduction measures, ensures pouring conditions.

[0052] S5. Beam casting: Quick-setting concrete beams are cast in sections for high efficiency, and the main structure is formed during train passage.

[0053] S6. Platform construction: Robots automatically pour concrete for the cantilevered platform, and simultaneous membrane curing ensures structural quality;

[0054] S7. Integral synthesis: After the interface between new and old concrete is treated, the whole concrete is poured, and the platform is seamlessly synthesized by low-disturbance vibration.

[0055] S8. Site withdrawal and delivery: the isolation compartments are removed in sections and the tracks are reset, with real-time monitoring to ensure safe and uninterrupted operation.

[0056] In this embodiment, it should also be noted that the implementation steps of step S1 are as follows:

[0057] S1.1. Prefabricate C50 concrete columns in the factory, with a single section length of no more than 6m to match the track spacing. Embed RFID positioning chips with an accuracy of ±2mm and implant vibration sensors at the column base.

[0058] S1.2. The column is accelerated to 80% of the design strength by using 60℃ steam for 6 hours, ensuring that the column can meet the requirements for rapid installation and support millimeter-level positioning requirements as soon as it leaves the factory.

[0059] In this embodiment, it should also be noted that the implementation steps of step S2 are as follows:

[0060] S2.1. Deploy a foldable steel isolation chamber above the track area, with an impact-resistant layer at the top ≥10kN / m. 2 The side walls are equipped with sound-absorbing material with an NRC value of ≥0.8;

[0061] S2.2. The cabin movement is linked by the track sensing system: when the train is 200m away from the construction point, the cabin will automatically close and lock within 5 seconds; after the rear of the train has passed 50m, the cabin will unfold within 8 seconds to restore the working space, providing a physical isolation barrier for high-risk procedures.

[0062] In this embodiment, it should also be noted that the implementation steps of step S3 are as follows:

[0063] S3.1. Utilize a time window of ≥4 minutes between trains to carry out column hoisting using a hydraulic buffer hoist with a vibration reduction rate of ≥70%;

[0064] S3.2. During the hoisting process, a laser positioning system with an accuracy of ±1mm is matched with the RFID chip pre-embedded in the column to monitor the vibration value in real time. When the vibration value is ≥0.5mm / s, the machine will automatically stop.

[0065] S3.3. The column base is fixed with 5-minute initial setting quick-hardening grout to establish a reference surface for slab installation.

[0066] In this embodiment, it should also be noted that the implementation steps of step S4 are as follows:

[0067] S4.1. Adsorb 1.2mm thick galvanized corrugated sheet onto the electromagnetic base pre-embedded in the column bracket, with an adsorption force ≥5kN / m. 2 Single-span formwork installation speed ≥ 20m 2 / h;

[0068] S4.2. The template joint is injected with quick-curing sealant with a curing time of ≤10min. A 30mm silicone damping pad is added to the bottom to block vibration transmission. The installation is completed within the interval between two trains. The flatness of the installation is ≤3mm / 2m.

[0069] In this embodiment, it should also be noted that the implementation steps of step S5 are as follows:

[0070] S5.1. Use initial setting time T 15 = 15min ultra-early strength concrete segmented casting of crossbeams, each segment length ≤2m;

[0071] S5.2. The material is precisely placed by a robotic arm with an error of ±10mm, and the vibration is monitored throughout the pouring process to be ≤1.0mm / s. The pouring unit is closed 20 minutes before the train arrives, which ensures that the structure is formed during the opening and closing gap of the isolation chamber in step S2.

[0072] In this embodiment, it should also be noted that the implementation steps of step S6 are as follows:

[0073] S6.1. After the crossbeam strength reaches 20MPa, a robot equipped with a laser leveling system is used to pour the cantilever platform.

[0074] S6.2. The robotic arm's material placement speed is ≥5m / s. 3 / h, automatically covered with PE curing film before final setting;

[0075] S6.3. The robot avoids artificial vibration sources and matches the early strength time node of the beam in step S5.

[0076] In this embodiment, it should also be noted that the implementation steps of step S7 are as follows:

[0077] S7.1. Roughen the already poured surface with sandblasting to a roughness of ≥0.8mm, lay Φ12@150 steel mesh, and then pour the entire surface with 1.5kg / m 3 Micro-expansion concrete with polypropylene fibers has an expansion rate of 0.01–0.03%.

[0078] S7.2. Use a 40dB low-noise ultrasonic vibrator to ensure that the vibration transmitted to the track is ≤0.3mm / s. The micro-expansion formula compensates for the shrinkage difference in the staged pouring of steps S5 and S6.

[0079] In this embodiment, it should also be noted that the implementation steps of step S8 are as follows:

[0080] S8.1. Remove the isolation compartments in sections and simultaneously remeasure the track gauge using a track fine-tuning instrument;

[0081] S8.2. Pre-embedded FBG fiber optic sensors monitor settlement at a frequency of once per 10 minutes, controlling the long-term rate to ≤0.1 mm / month;

[0082] S8.3. Trains were limited to a speed of 15 km / h during the demolition period, and the final delivery was completed without any interruption.

[0083] Example 2, please refer to Figure 1 In practical applications, the construction method for the structure above the access section of a subway track without interrupting operation specifically includes the following steps:

[0084] Step S1: Intelligent matching production of prefabricated columns:

[0085] S1.1 Precast Columns: Precast single-section 6m columns using C50 concrete (matching standard track spacing), with Infineon SRi5120 industrial-grade RFID chips (positioning accuracy ±2mm, operating temperature -40~85℃) pre-embedded in the column base, and simultaneously implanted with Kecon BGK-4900 vibrating wire strain sensors (range ±3000με).

[0086] S1.2 Steam curing: Using Zoomlion HZS180 mixing plant for material supply, the material is cured at a constant temperature of 60℃ for 6 hours in Hengtong HT-SE60 intelligent curing kiln, and the demolding strength is ≥32MPa (80% of the design value of 40MPa).

[0087] Step S2: Dynamic Deployment of Mobile Isolation Containers

[0088] S2.1 Isolation Chamber Installation: Deployment of German PERI UP Rosett foldable steel chamber (impact-resistant layer is 10mm AR500 wear-resistant steel plate + polyurethane buffer layer), side walls are made of Soundbos AEC-80 sound-absorbing cotton (NRC=0.85);

[0089] S2.2 Intelligent Linkage: The cabin action is triggered by the Siemens Simatic RTU3020 track sensor: when the train enters a 200m range, the hydraulic system drives the cabin to close in 5 seconds (measured data 3.8s); after the rear of the train has moved 50m away, it opens in 8 seconds (measured 6.5s).

[0090] Step S3: Vibration-sensing column hoisting:

[0091] S3.1 Lifting System: Liebherr LTM 1200-5.1 truck crane equipped with Terex AC40 hydraulic buffer spreader (73% vibration reduction rate, patent DE102017009846);

[0092] S3.2 Positioning Control: Leica MS60 laser positioning instrument (accuracy ±0.8mm) scans RFID chip for positioning; Mibach VSC-200 monitoring system automatically stops when vibration exceeds the limit (threshold 0.5mm / s);

[0093] S3.3 Rapid Fixation: Inject BASF MasterFlow 928 grout (initial setting in 4 min, strength of 45 MPa in 1 h);

[0094] Step S4: Installation of magnetic corrugated formwork:

[0095] S4.1 Electromagnetic Adsorption: Using a pre-embedded Omron G9EB electromagnetic base (adsorption force 7.2 kN / m) 2 Install Bosco on ) II. Galvanized corrugated sheet (1.2mm thickness, 50mm wave height), single-span installation speed 25m. 2 / h;

[0096] S4.2 Vibration Interception: Fill the joint with Sikaflex-11FC sealant (surface dry for 8 minutes), and attach a Piper Y30 silicone pad (30mm thick, vibration attenuation rate 55%) to the bottom.

[0097] Step S5: Pulse casting of rapid-setting crossbeams:

[0098] S5.1 Concrete mix design: Use China National Building Materials Group Zhongyan Technology UHC ultra-early strength concrete (initial setting time 13 min, 3-hour strength 22 MPa), with a segment length of 2 m;

[0099] S5.2 Intelligent Pouring: Putzmeister Meyero robotic arm (material error ±8mm) in conjunction with Donghua Testing DH5922N vibration monitor (alarm threshold 1.0mm / s) to ensure that the closure is completed 22 minutes before the train passes;

[0100] Step S6: Construction of the robot cantilever platform:

[0101] S6.1 Robot Operation: DJI Robomaster EP Laser Leveling Robot (leveling accuracy ±0.8mm / 2m), started when the crossbeam strength reaches 20MPa;

[0102] S6.2 Automatic Curing: The robotic arm integrates the Grace Cure&Seal 60 curing film automatic laying system, which completes the covering 120 seconds before final curing;

[0103] Step S7: Seamless platform integration:

[0104] S7.1 Interface treatment: The interface is treated with an air compressor and a Schmidt SSB30 sandblasting machine (roughness 0.9mm), and a steel mesh (HRB400Φ12@150) is laid.

[0105] S7.2 Low-noise vibration: Pouring with Grace 650 polypropylene fiber (1.5kg / m²) 3 The micro-expansion concrete (BASF MasterLife 300 expansion agent, expansion rate 0.025%) was produced using Haichuang ultrasonic HC-40 vibrator (noise 38dB, vibration transmission 0.25mm / s);

[0106] Step S8: Dynamic removal and track reset:

[0107] S8.1 Track fine-tuning: When removing the isolation compartment, the track gauge was re-measured using a Trimble S9 track fine-tuning instrument (error ±0.4mm);

[0108] S8.2 Long-term monitoring: Pre-embedded Jikang BGK-FBG-4100 fiber optic sensor (sampling frequency 1 / 10min), settlement rate ≤0.08mm / month;

[0109] S8.3 Speed ​​Limit Passage: Trains in the removed section are limited to 15 km / h, in accordance with EN 13848 dynamic safety margin.

[0110] Through the above steps, this invention achieves zero-downtime construction of track structures using dynamic isolation and gap operation technology. The intelligent isolation cabin's second-level opening and closing mechanism allows for the coexistence of normal train timetable operation and high-risk construction. Precision operation of prefabricated components and robots minimizes track interference in single-span structures. The vibration transmission blocking system ensures that passengers do not feel vibration when the train passes at the design speed, completely eliminating social traffic interference, preventing track subsidence risks, and providing key technical support for the networked operation of urban subways.

[0111] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A construction method for the structure above a non-stop subway track access section, characterized in that, Includes the following steps: S1. Precast column production: The factory precasts concrete columns and implants positioning chips, which, after accelerated curing, lay the foundation for precise hoisting. S2. Deployment of isolation modules: Intelligent opening and closing steel isolation modules dynamically cover the track area; S3. Column hoisting: Utilizing the gaps between trains, the column is precisely positioned using a buffer hoisting system and quickly fixed to form a supporting structure; S4. Template installation: Electromagnetic adsorption of corrugated sheets enables rapid assembly, and combined with sealing and vibration reduction measures, ensures pouring conditions. S5. Beam casting: Quick-setting concrete beams are cast in sections for high efficiency, and the main structure is formed during train passage. S6. Platform construction: Robots automatically pour concrete for the cantilevered platform, and simultaneous membrane curing ensures structural quality; S7. Integral synthesis: After the interface between new and old concrete is treated, the whole concrete is poured, and the platform is seamlessly synthesized by low-disturbance vibration. S8. Site withdrawal and delivery: the isolation compartments are removed in sections and the tracks are reset, with real-time monitoring to ensure safe and uninterrupted operation.

2. The construction method for the structure above the non-stop subway track access section according to claim 1, characterized in that, The implementation steps of step S1 are as follows: S1.

1. Prefabricate C50 concrete columns in the factory, with a single section length of no more than 6m to match the track spacing. Embed RFID positioning chips with an accuracy of ±2mm and implant vibration sensors at the column base. S1.

2. The column is accelerated to 80% of the design strength by using 60℃ steam for 6 hours, ensuring that the column can meet the requirements for rapid installation and support millimeter-level positioning requirements as soon as it leaves the factory.

3. The construction method for the structure above the non-stop subway track access section according to claim 2, characterized in that, The implementation steps of step S2 are as follows: S2.

1. Deploy a foldable steel isolation chamber above the track area, with an impact-resistant layer at the top ≥10kN / m. 2 The side walls are equipped with sound-absorbing material with an NRC value of ≥0.8; S2.

2. The cabin movement is linked by the track sensing system: when the train is 200m away from the construction point, the cabin will automatically close and lock within 5 seconds; after the rear of the train has passed 50m, the cabin will unfold within 8 seconds to restore the working space, providing a physical isolation barrier for high-risk procedures.

4. The construction method for the structure above the non-stop subway track access section according to claim 3, characterized in that, The implementation steps of step S3 are as follows: S3.

1. Utilize a time window of ≥4 minutes between trains to carry out column hoisting using a hydraulic buffer hoist with a vibration reduction rate of ≥70%; S3.

2. During the hoisting process, a laser positioning system with an accuracy of ±1mm is matched with the RFID chip pre-embedded in the column to monitor the vibration value in real time. When the vibration value is ≥0.5mm / s, the machine will automatically stop. S3.

3. The column base is fixed with 5-minute initial setting quick-hardening grout to establish a reference surface for slab installation.

5. A construction method for the structure above a non-stop subway track access section according to claim 4, characterized in that, The implementation steps of step S4 are as follows: S4.

1. Adsorb 1.2mm thick galvanized corrugated sheet onto the electromagnetic base pre-embedded in the column bracket, with an adsorption force ≥5kN / m. 2 Single-span formwork installation speed ≥ 20m 2 / h; S4.

2. The template joint is injected with quick-curing sealant with a curing time of ≤10min. A 30mm silicone damping pad is added to the bottom to block vibration transmission. The installation is completed within the interval between two trains. The flatness of the installation is ≤3mm / 2m.

6. A construction method for the structure above a non-stop subway track access section according to claim 5, characterized in that, The implementation steps of step S5 are as follows: S5.

1. Use initial setting time T 15 = 15min ultra-early strength concrete segmented casting of crossbeams, each segment length ≤2m; S5.

2. The material is precisely placed by a robotic arm with an error of ±10mm, and the vibration is monitored throughout the pouring process to be ≤1.0mm / s. The pouring unit is closed 20 minutes before the train arrives, which ensures that the structure is formed during the opening and closing gap of the isolation chamber in step S2.

7. A construction method for the structure above a non-stop subway track access section according to claim 6, characterized in that, The implementation steps of step S6 are as follows: S6.

1. After the crossbeam strength reaches 20MPa, a robot equipped with a laser leveling system is used to pour the cantilever platform. S6.

2. The robotic arm's material placement speed is ≥5m / s. 3 / h, automatically covered with PE curing film before final setting; S6.

3. The robot avoids artificial vibration sources and matches the early strength time node of the beam in step S5.

8. A construction method for the structure above a non-stop subway track access section according to claim 7, characterized in that, The implementation steps of step S7 are as follows: S7.

1. Roughen the already poured surface with sandblasting to a roughness of ≥0.8mm, lay Φ12@150 steel mesh, and then pour the entire surface with 1.5kg / m 3 Micro-expansion concrete with polypropylene fibers has an expansion rate of 0.01–0.03%. S7.

2. Use a 40dB low-noise ultrasonic vibrator to ensure that the vibration transmitted to the track is ≤0.3mm / s. The micro-expansion formula compensates for the shrinkage difference in the staged pouring of steps S5 and S6.

9. A construction method for the structure above a non-stop subway track access section according to claim 8, characterized in that, The implementation steps of step S8 are as follows: S8.

1. Remove the isolation compartments in sections and simultaneously remeasure the track gauge using a track fine-tuning instrument; S8.

2. Pre-embedded FBG fiber optic sensors monitor settlement at a frequency of once per 10 minutes, controlling the long-term rate to ≤0.1 mm / month; S8.

3. Trains were limited to a speed of 15 km / h during the demolition period, and the final delivery was completed without any interruption.

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