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Rail Transit Subgrade Settlement Monitoring Solution
Applicable scenarios of the plan:
This plan mainly addresses the issues of untimely data collection for rail environment monitoring, delayed monitoring information, and the difficulties in equipment management and line operation management.
This plan can be applied to:
1. Deformation monitoring and settlement monitoring of subway tunnel subgrades, railway subgrades, and high-speed rail bridge subgrades during the operational period;
2. Deformation monitoring and settlement monitoring of railway subgrades under surface shield tunneling;
3. Deformation monitoring and settlement monitoring of high-speed rail bridge subgrades under surface shield tunneling;
4. Deformation monitoring and settlement monitoring of large surrounding structures, highways/city roads, bridges/culverts, etc. during construction;
5. Real-time monitoring can be conducted not only during the construction period of rail transit line projects but also during the operational phase after construction.
The entire solution is centered around a monitoring and early warning cloud service platform, using mobile internet as the information transmission medium to connect real-time interactions between sensor devices and users. This plan achieves long-term, continuous collection and transmission of information reflecting the geotechnical safety status, change characteristics, and development trends of rail transit lines, and carries out statistical analysis, information feedback, and safety early warning throughout the entire workflow. It ensures that the technology is mature, economically reasonable, and the plan is reliable, ensuring the safety of personnel, property, and traffic line operations in the engineering structure and surrounding environment.
Schematic diagram of the plan:
This plan is an integrated monitoring information solution, consisting of three parts: monitoring equipment, communication network, and monitoring and early warning cloud service platform.
Introduction to core monitoring equipment:
Maiko Sensor - SVT626T-MB Tilt Sensor:
| Accuracy |
0.01° |
| Range |
±15° |
| Output |
RS485 |
| Temperature drift |
0.001°/℃ |
| Operating temperature |
-40-85℃ |
| Input voltage |
DC 9-36V |
| Product dimensions |
L92*M18*H16mm |
Monitoring items and monitoring instruments:
| Monitoring itemMonitoring instrument |
Horizontal displacement |
| Convergence meter |
Vertical displacement |
| Static level gauge |
Deep horizontal displacement |
| Fixed inclinometer |
Soil layer vertical displacement |
| Electromagnetic settlement gauge |
Tilt |
| Tilt meter |
Crack |
| Crack gauge |
Pore water pressure |
| Piezometer |
Groundwater level |
| Water level gauge |
Geotechnical pressure |
| Soil pressure gauge |
Anchor rod, anchor cable, and soil nail tension |
| Load cell |
Structural stress |
| Strain gauge |
Rebar gaugeRailway line settlement observation |
Achieved functions:
1. 24-hour real-time monitoring: By monitoring support structures, surface settlement, and the tilt of surrounding piles in real-time, the structural changes of the building foundation pit can be grasped.
2. Report pushing: Monitoring results are displayed and published in real-time, and monitoring reports are regularly pushed to users.
3. Multiple levels of early warning: A three-level alarm mechanism is established, and when detection data is abnormal, users are notified immediately via SMS, fax, broadcast, etc., achieving a comprehensive early warning function.
4. Emergency plan handling: Corresponding handling methods are directly extracted from the expert system, and timely measures such as personnel intervention and road closure are taken to eliminate safety hazards at the budding stage.
5. Structural trend analysis: Through the analysis and safety evaluation of monitoring data during the foundation pit construction period, structural stability trend analysis can be achieved.
6. Historical data storage: The storage of monitoring data provides a comparative basis for the design and construction of similar projects in the future.
6. 历史资料存储：监测数据的存储，为今后同类工程设计、施工提供类比依据。
Inclination monitoring
X, Y axis, industrial design, small size, low power consumption
Compass heading
X, Y, Z three axis, attitude calculation measurement algorithm
Imu inertial sensor
Three-axis angle, angular velocity, acceleration, magnetic field measurement
Attitude heading reference system
Meet the static, dynamic, high and low temperature of a variety of complex environmental use
Engineering case
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