Full-scale optic fiber sensing technology for monitoring road structural form
An optical fiber sensing technology and road structure technology, which are applied in the field of structural intelligent health monitoring to achieve good guiding significance.
Inactive Publication Date: 2011-10-19
DALIAN UNIV OF TECH
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[0003] The purpose of the present invention is to provide a full-scale optical fiber sensing technology based on road structure shape monitoring, which solves the problem of full-scale monitoring of road structure shape
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[0020] The implementation of full-scale optical fiber sensing technology based on road structure shape monitoring is as follows:
[0021] Firstly, 1 distributed optical fiber is clamped by 3 shape memory alloys and placed in the small square groove of 2 metal circular tubes, and then buried in the base layer of the road structure as a whole (wherein, the optical fiber is placed on both sides of the road structure in the full-scale direction). Redundant leads are reserved at the end); the lead-out line at one end of the optical fiber is connected to the 11 distributed optical fiber demodulator, the 11 distributed optical fiber demodulator is connected to the data processor, and the 5 dowel bar is connected to the external 12 force transmission device. At this point, the required equipment is configured, and the system is checked for the smoothness of the optical path. During the test, the force is transmitted to the 5 dowel bar through the external 12 force transmission device,...
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The invention discloses a full-scale optic fiber sensing technology for monitoring a road structural form and belongs to the field of intelligently and healthily monitoring structures. The technology is characterized by comprising the following steps of: performing full-scale monitoring on the road structural form by utilizing a distributed optic fiber sensing technology; and on the basis of optic fiber sensing information in a full-scale direction, reshaping the monitored road structural form by a method for reconstructing a relationship between bending strain and curvature, and comparatively analyzing the reconstructed road structural form and the initial form to reflect health information of a road structure. The invention has the advantages that: a basic form of a road structure service condition can be reconstructed, the road structural form can be timely monitored on a full scale, the initial form and the reconstructed form of the road structure are comparatively analyzed, and the health information of the road structure in the full-scale direction can be mastered.
Description
technical field [0001] The invention belongs to the technical field of structural intelligent health monitoring, and relates to a full-scale optical fiber sensing technology for road structural shape monitoring. Background technique [0002] For road structures, the actual load-bearing body is the foundation, whose strength and stability directly affect the use properties of the road. However, when the foundation of the road structure has defects such as local subsidence and cracking, it will quickly spread to the road surface due to the multiple actions of external loads. If such damage to the road structure is repaired, it is necessary to remediate from the bottom foundation, and the financial and material resources required will be quite large. Therefore, it is necessary to monitor and maintain the state of the road structure foundation in time, so as not to cause major problems to the later work. Regarding the road structure, the current detection technologies include:...
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IPC IPC(8): G01B11/24G01B11/16E01F11/00
Inventor 周智刘婉秋王花平何建平黄明华
Owner DALIAN UNIV OF TECH