Hits:

Date of Publication:2022-10-10

Journal:铁道建筑

Affiliation of Author(s):建设工程学部

Issue:2

Page Number:111-115

ISSN No.:1003-1995

Abstract:Karst cavern collapse is the most serious failure mode of railway subgrade with strong insidious and wide spatial distribution. Common monitoring and inspection methods cannot meet the requirement of distributed monitoring,so distributed Brillouin Optical Fiber sensing technology was put forward for the collapse location and identification. Collapse monitoring sensor was packaged by the fiber reinforced polymer,and absolute temperature compensation was developed to eliminate the effect of environmental temperature on collapse strain measurement. Experimental results show that absolute temperature can effectively eliminate the strain error induced by the temperature influence,the collapse strain was agreed with the real condition of cavern collapse based on the distributed collapse strain from cavern collapse identification and location.

Note:新增回溯数据