Structure health monitoring system for weak soil shield tunnel

Abstract

The invention provides a structure health monitoring system for a weak soil shield tunnel. Monitoring on the interior of the whole line range of a tunnel is conducted aiming at the characteristics ofthe weak soil shield tunnel structure, the requirements for health monitoring of construction and maintenance of the tunnel are met, and the structure health monitoring system comprises a data collection sub system, a monitoring data transmission network sub system, a center database sub system, a tunnel structure health evaluation sub system and a tunnel BIM model information sub system which arein communication connection with one another. The data collection sub system comprises a strain fiber optic sensor and a temperature fiber optic sensor which are arranged in the weak soil shield tunnel, the temperature fiber optic sensor is arranged in the length direction of the weak soil shield tunnel, the strain fiber optic sensor comprises longitudinal strain distributed optic fibers arrangedin the length direction of the weak soil shield tunnel and annular strain distributed optic fibers arranged in the circumferential direction of the weak soil shield tunnel, wherein the longitudinal strain distributed optic fibers and the annular strain distributed optic fibers are connected, and the annular strain distributed optic fibers are arranged at the joints of every two adjacent tunnel duct pieces, and used for collecting and obtaining monitoring data of the weak soil shield tunnel.

Description

technical field [0001] The invention relates to the technical field of tunnels, in particular to a structural health monitoring system for soft soil shield tunnels. Background technique [0002] Under the dual effects of the long-term natural environment and the use environment, the existing tunnels will have lining cracks, deformation and water leakage and other diseases to varying degrees with use. Due to the influence of structural cracks, erosive groundwater seepage and other factors, various diseases with insufficient durability such as corrosion of tunnel lining steel bars and structural concrete corrosion will occur, which will seriously affect the performance of the tunnel and lead to failure to meet the tunnel structural design. The base period is in urgent need of major repairs, which not only wastes a lot of money, but also affects the normal use of the tunnel. Therefore, it is not only extremely necessary but also urgent to study the application technology of su...

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Problems solved by technology

[0007] For the existing tunnel structure health monitoring system, either the point monitoring technology is used, which is not suitable for soft soil shield tunnel monitoring; and the distributed sensing technology monitoring system has an inaccurate understanding of the deformation characteristics of the soft soil shield tunnel structure As a result, the data monitored by the distributed sensing technology for monitoring cannot reflect the technical problems of the structural characteristics of the soft soil shield tunnel. The present invention provides a structural health monitoring system for the soft soil shield tunnel, aiming at the soft soil shield tunnel structure The characteristics of the tunnel are monitored throughout the tunnel to meet the health monitoring needs of its construction and maintenance

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