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Rail Transit Subgrade Settlement Monitoring Solution
Applicable scenarios for 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 and settlement monitoring of subway tunnel foundations, railway foundations, and high-speed rail bridge foundations during the operational period;
2. Deformation and settlement monitoring of railway foundations under the surface by shield tunneling;
3. Deformation and settlement monitoring of high-speed rail bridge foundations under the surface by shield tunneling;
4. Deformation 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 advanced technology, economic reasonableness, and reliable solutions, safeguarding the safety of personnel, property, and traffic line operations in the engineering structure and surrounding environment.
Schematic diagram of the plan:
This plan is a comprehensive 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 itemItem |
Monitoring 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 gauge |
Railway settlement observation
Functional achievements
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 comprehensive early warning functionality.
4. Emergency response handling: Corresponding handling methods are directly extracted from the expert system, and timely measures such as personnel intervention and road closures 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.
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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