Tunnel online health monitoring system

1.System Overview

Figure 1.1 Topology diagram of online monitoring system

The system consists of a perception layer, a transmission layer, and an application layer, specifically consisting of a sensor subsystem, a data acquisition subsystem, a data transmission subsystem, a database subsystem, a data processing and control subsystem, a security evaluation and early warning subsystem. Through mutual coordination among various layers, the corresponding functions of the system are achieved.

2. Main monitoring content

3.Monitoring content and equipment

Table 3.1 Monitoring Content and Equipment

Monitoring content	MONITORING EQUIPMENT
Settlement and uneven settlement	Static level
Arch soil pressure	Fiber optic earth pressure box
Structural temperature distribution monitoring	Fiber Optic Temperature Sensor
Stress on segment reinforcement	Anchor stress gauge
Segment concrete	Embedded fiber optic strain sensor
Opening degree of pipe segment (deformation) joint	Fiber optic displacement sensor
Segment joint	Fiber optic pressure sensor
Connecting bolt force	Fiber optic strain sensor
Surface crack width of tunnel lining	Fiber optic displacement sensor
Cross section convergence deformation	Convergence gauge
internal displacement of surrounding rock	Multi-point displacement meter
Permeate	Fiber optic osmotic pressure sensor