Tunnel Segment Dislocation Monitoring With Graphene Sensor Plates
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Solution Overview
Problem
Tunnel segment dislocation, which affects the appearance and safety of tunnel structures by causing segment cracking, falling off, and potential waterproofing issues, has not been adequately monitored in shield tunnels.
Innovation Solution
An intelligent tunnel segment monitoring system using displacement transfer plates and dislocation monitoring sensors, equipped with graphene resistive sensor chips, converts relative displacements into electric signals for analysis by an external data terminal, providing real-time monitoring of tunnel segment conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional monitoring methods are used for tunnel segments, then the monitoring system is simple, but the measurement precision and reliability of detecting segment dislocation is insufficient
Solution Approach 1:
The patent replaces traditional mechanical monitoring methods with a sensor-based electrical measurement system. Displacement transfer plates convert mechanical displacement into measurable quantities, while sensors (such as strain gauges, LVDTs, or optical sensors) detect these changes and convert them into electrical signals for precise digital processing and analysis, achieving high measurement precision without complex mechanical linkages
Solution Approach 2:
The monitoring system is segmented into independent functional modules: displacement transfer plates attached to individual tunnel segments, separate sensors for detecting relative displacement, data acquisition devices for signal processing, and analysis systems for interpretation. This modular segmentation allows each component to be optimized independently while maintaining overall system precision without excessive complexity
2Reliability
If no monitoring system is installed, then the device complexity is low, but the reliability of tunnel structure safety is compromised
Solution Approach 1:
The patent introduces displacement transfer plates as intermediary elements that are attached to the tunnel segments. These plates serve as mediators between the tunnel structure and the sensors, transferring and amplifying displacement signals to make them detectable. This intermediary approach enables reliable safety monitoring while keeping the overall system complexity manageable through standardized, off-the-shelf sensor components
Solution Approach 2:
The monitoring system implements continuous feedback by constantly measuring the relative displacement between adjacent tunnel segments and transmitting this data to analysis systems. The system provides real-time feedback on segment alignment, enabling timely detection of dislocation trends and allowing operators to take preventive actions before structural damage occurs, thereby enhancing reliability without requiring overly complex active control mechanisms
3Measurement precision
If manual inspection methods are used, then the equipment cost is low, but the loss of time for detection and the measurement precision are insufficient
Solution Approach 1:
The monitoring system enables continuous measurement of tunnel segment displacement through permanently installed sensors and displacement transfer plates. Unlike manual inspection which occurs periodically, this system continuously captures displacement data in real-time, providing ongoing precise measurement without requiring repeated human intervention, thereby eliminating detection time loss while maintaining high measurement precision
Solution Approach 2:
The system performs self-service monitoring by automatically measuring, recording, and transmitting displacement data without requiring manual inspection. The sensors continuously monitor segment alignment and automatically generate measurement records, eliminating the time-consuming manual measurement process while maintaining or improving measurement precision through consistent, automated data collection
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system accurately detects and quantifies tunnel segment dislocations, enabling timely intervention to prevent structural damage and ensure safety by providing precise displacement and vibration data.
Implementation Method 1
each telescopic rod includes a first rod body, a first elastic member, a second elastic member, a third elastic member and a second rod body which are connected in sequence; a graphene resistive sensor chip is also connected between the first elastic member and the third elastic member
Data Source
AI summary
The present disclosure discloses an intelligent tunnel segment monitoring system, including two displacement transfer plates and a dislocation monitoring sensor; the two displacement transfer plates are respectively arranged on two adjacent tunnel segments; the dislocation monitoring sensor is connected to the two displacement transfer plates and is used for detecting relative displacement information between the two displacement transfer plates; when the two tunnel segments do not have a relative displacement, the two displacement transfer plates are located on the same plane; one of the displacement transfer plates is provided with a data acquisition and transmission device; the dislocation monitoring sensor is connected to an external data analysis terminal through the data acquisition and transmission device.