Distributed optical fiber monitoring method and system for ship lock structure strain and stress

Abstract

The invention brings forward a distributed fiber monitoring method and system for strains and stresses of a ship lock structure. The system comprises distributed sensitive optical cables, a data acquisition device, and a data processing and analyzing module; and the distributed sensitive optical cables are laid into tops and bottoms or inner surfaces and outer surfaces of reinforced concrete surface layers of a lock head base plate, a water delivery gallery, a lock chamber base plate, and a lock chamber wall by a way of binding with main ribs so as to form a U-shaped loop. After concrete pouring is completed for laying of the distributed sensitive optical cables into the tops and bottoms or inner surfaces and outer surfaces of the reinforced concrete surface layers of the lock head base plate, the water delivery gallery, the lock chamber base plate, and the lock chamber wall by a way of binding with main ribs, the distance between the sensitive optical cables and the surfaces of the concretes is 5 to 10cm; and the sensitive optical cables are deformed synchronously with the reinforced concrete structures and optical fiber sensors generate corresponding stresses. And a data acquisition station is established at the top of the lock head; and the laid sensitive optical cables lines are connected to the data acquisition station by optical cables.

Description

technical field [0001] The invention belongs to the technical field of water transportation engineering monitoring, and in particular relates to a method and system for monitoring the strain and stress of the main structure of a ship lock based on distributed optical fiber sensing technology. Background technique [0002] my country's waterway engineering infrastructure is in a period of large-scale construction, and large-scale concrete structures have also been more and more widely used in waterway engineering such as ship locks. Due to the complex structure and difficult construction of water transport projects such as ship locks, in order to ensure the safety of structures, it is necessary to monitor the strain and stress states of key parts during construction and operation. Through monitoring, the construction quality control parameters can be accurately known, and the stress characteristics of key parts of the structure can be understood, which is of great significanc...

AI Technical Summary

Problems solved by technology

However, due to the complex structure of the ship lock project, various construction nodes, and the complicated design of the distributed monitoring system, BOTDA technology has not been effectively applied in the ship lock project.

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